← All changes | includes/class-mxchat-integrator.php +8252 -3454 2.0.4 → 2.5.6 View file →

		@@ -1,3454 +1,8252 @@
1		-<?php
2		-if (!defined('ABSPATH')) {
3		- exit;
4		-}
5		-
6		-class MxChat_Integrator {
7		- private $options;
8		- private $prompts_options;
9		- private $chat_count;
10		- private $fallbackResponse;
11		- private $productCardHtml;
12		- private $word_handler;
13		-
14		-public function __construct() {
15		- $this->options = get_option('mxchat_options');
16		- $this->prompts_options = get_option('mxchat_prompts_options', array());
17		-
18		- $this->chat_count = get_option('mxchat_chat_count', 0);
19		- $this->word_handler = new MXChat_Word_Handler($this->options);
20		-
21		- add_action('wp_enqueue_scripts', array($this, 'mxchat_enqueue_scripts_styles'));
22		- add_action('wp_ajax_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request'));
23		- add_action('wp_ajax_nopriv_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request'));
24		-
25		- add_action('wp_ajax_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message'));
26		- add_action('wp_ajax_nopriv_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message'));
27		- // Add the AJAX actions for checking if the pre-chat message was dismissed
28		- add_action('wp_ajax_mxchat_check_pre_chat_message_status', array($this, 'mxchat_check_pre_chat_message_status'));
29		- add_action('wp_ajax_nopriv_mxchat_check_pre_chat_message_status', array($this, 'mxchat_check_pre_chat_message_status'));
30		-
31		- add_action('wp_ajax_mxchat_fetch_conversation_history', [$this, 'mxchat_fetch_conversation_history']);
32		- add_action('wp_ajax_nopriv_mxchat_fetch_conversation_history', [$this, 'mxchat_fetch_conversation_history']);
33		-
34		- add_action('wp_ajax_mxchat_add_to_cart', [$this, 'mxchat_add_to_cart']);
35		- add_action('wp_ajax_nopriv_mxchat_add_to_cart', [$this, 'mxchat_add_to_cart']);
36		-
37		- if (!wp_next_scheduled('mxchat_reset_rate_limits')) {
38		- wp_schedule_event(time(), 'daily', 'mxchat_reset_rate_limits');
39		- }
40		-
41		- // Add REST API routes registration
42		- add_action('rest_api_init', array($this, 'register_routes'));
43		-
44		- add_action('wp_ajax_mxchat_fetch_new_messages', array($this, 'mxchat_fetch_new_messages'));
45		- add_action('wp_ajax_nopriv_mxchat_fetch_new_messages', array($this, 'mxchat_fetch_new_messages'));
46		-
47		- add_action('mxchat_reset_rate_limits', array($this, 'mxchat_reset_rate_limits'));
48		-
49		- add_action('wp_ajax_mxchat_upload_pdf', [$this, 'handle_pdf_upload']);
50		- add_action('wp_ajax_nopriv_mxchat_upload_pdf', [$this, 'handle_pdf_upload']);
51		- add_action('wp_ajax_mxchat_remove_pdf', [$this, 'handle_pdf_remove']);
52		- add_action('wp_ajax_nopriv_mxchat_remove_pdf', [$this, 'handle_pdf_remove']);
53		-
54		- // Add these with your other add_action hooks
55		- add_action('wp_ajax_mxchat_upload_word', array($this, 'mxchat_handle_word_upload'));
56		- add_action('wp_ajax_nopriv_mxchat_upload_word', array($this, 'mxchat_handle_word_upload'));
57		- add_action('wp_ajax_mxchat_remove_word', array($this, 'mxchat_handle_word_remove'));
58		- add_action('wp_ajax_nopriv_mxchat_remove_word', array($this, 'mxchat_handle_word_remove'));
59		- add_action('wp_ajax_mxchat_check_word_status', array($this, 'mxchat_check_word_status'));
60		- add_action('wp_ajax_nopriv_mxchat_check_word_status', array($this, 'mxchat_check_word_status'));
61		-
62		- add_action('wp_ajax_nopriv_mxchat_handle_save_email_and_response', [$this, 'mxchat_handle_save_email_and_response']);
63		- add_action('wp_ajax_mxchat_handle_save_email_and_response', [$this, 'mxchat_handle_save_email_and_response']);
64		- add_action('wp_ajax_nopriv_mxchat_check_email_provided', [$this, 'mxchat_check_email_provided']);
65		- add_action('wp_ajax_mxchat_check_email_provided', [$this, 'mxchat_check_email_provided']);
66		-}
67		-
68		-
69		- private function mxchat_increment_chat_count() {
70		- $chat_count = get_option('mxchat_chat_count', 0);
71		- $chat_count++;
72		- update_option('mxchat_chat_count', $chat_count);
73		- }
74		-
75		-function mxchat_fetch_conversation_history() {
76		- if (empty($_POST['session_id'])) {
77		- wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
78		- wp_die();
79		- }
80		-
81		- $session_id = sanitize_text_field($_POST['session_id']);
82		- $history = get_option("mxchat_history_{$session_id}", []); // Retrieve stored history
83		- $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai'); // Get current chat mode
84		-
85		- if (empty($history)) {
86		- // Even if history is empty, return the chat mode
87		- wp_send_json_success([
88		- 'conversation' => [],
89		- 'chat_mode' => $chat_mode
90		- ]);
91		- wp_die();
92		- }
93		-
94		- wp_send_json_success([
95		- 'conversation' => $history,
96		- 'chat_mode' => $chat_mode
97		- ]);
98		- wp_die();
99		-}
100		-private function mxchat_fetch_conversation_history_for_ajax($session_id) {
101		- $history = get_option("mxchat_history_{$session_id}", []); // Retrieve stored history based on session ID
102		- $formatted_history = [];
103		-
104		- // Format the history to align with the expected structure for OpenAI
105		- foreach ($history as $entry) {
106		- $formatted_history[] = [
107		- 'role' => $entry['role'], // Ensure this matches 'user' or 'assistant'
108		- 'content' => $entry['content']
109		- ];
110		- }
111		-
112		- return $formatted_history;
113		-}
114		-
115		-
116		-private function mxchat_fetch_conversation_history_for_ai($session_id) {
117		- $history = get_option("mxchat_history_{$session_id}", []);
118		- $formatted_history = [];
119		-
120		- // Adjusted for code-heavy conversations
121		- $max_tokens = 120000; // Context window size
122		- $reserved_tokens = 5000; // Space for system prompts + current query
123		- $current_token_count = 0;
124		-
125		- // Allowed HTML tags for content sanitization
126		- $allowed_tags = [
127		- 'pre' => ['class' => true],
128		- 'code' => ['class' => true],
129		- 'span' => ['class' => true],
130		- 'div' => ['class' => true],
131		- 'strong' => [],
132		- 'em' => []
133		- ];
134		-
135		- foreach (array_reverse($history) as $entry) {
136		- // Preserve code blocks while sanitizing other HTML
137		- $clean_content = wp_kses($entry['content'], $allowed_tags);
138		-
139		- // Detect code blocks in content
140		- $has_code = false;
141		-// Replace the HTML check with:
142		-// Allow messages that contain code blocks or are plain text
143		-if (strpos($clean_content, '<pre') === false &&
144		- strpos($clean_content, '<code') === false &&
145		- $clean_content !== strip_tags($entry['content'])) {
146		- continue;
147		-}
148		-
149		- // Skip entries that lost significant content during sanitization
150		- if (!$has_code && $clean_content !== strip_tags($entry['content'])) {
151		- continue;
152		- }
153		-
154		- // More accurate token estimation (1 token ≈ 4 characters)
155		- $token_estimate = ceil(mb_strlen($clean_content, 'UTF-8') / 4);
156		-
157		- // Check token budget with the new estimate
158		- if (($current_token_count + $token_estimate + $reserved_tokens) > $max_tokens) {
159		- // Try to fit partial content if it's the first entry
160		- if (empty($formatted_history)) {
161		- $clean_content = mb_substr($clean_content, 0, ($max_tokens - $reserved_tokens) * 4);
162		- $token_estimate = ceil(mb_strlen($clean_content, 'UTF-8') / 4);
163		- } else {
164		- break;
165		- }
166		- }
167		-
168		- // Add to formatted history
169		- $formatted_history[] = [
170		- 'role' => $entry['role'],
171		- 'content' => $clean_content
172		- ];
173		-
174		- $current_token_count += $token_estimate;
175		- }
176		-
177		- // Reverse back to maintain chronological order
178		- $formatted_history = array_reverse($formatted_history);
179		-
180		- // Add system message about code context
181		- array_unshift($formatted_history, [
182		- 'role' => 'system',
183		- 'content' => 'Preserved code blocks are marked with [CODE BLOCK PRESERVED]. '
184		- . 'Maintain formatting and syntax highlighting when referencing code.'
185		- ]);
186		-
187		- return $formatted_history;
188		-}
189		-
190		-public function register_routes() {
191		- //error_log(esc_html__('Registering MxChat REST routes', 'mxchat'));
192		-
193		- register_rest_route('mxchat/v1', '/stream', [
194		- 'methods' => 'GET',
195		- 'callback' => [$this, 'mxchat_stream_events'],
196		- 'permission_callback' => [$this, 'verify_chat_session'],
197		- ]);
198		-
199		- register_rest_route('mxchat/v1', '/agent-response', [
200		- 'methods' => 'POST',
201		- 'callback' => [$this, 'mxchat_handle_agent_response'],
202		- 'permission_callback' => [$this, 'verify_slack_request'],
203		- ]);
204		-
205		- register_rest_route('mxchat/v1', '/slack-interaction', [
206		- 'methods' => 'POST',
207		- 'callback' => [$this, 'handle_slack_interaction'],
208		- 'permission_callback' => [$this, 'verify_slack_request'],
209		- ]);
210		-
211		- //error_log(esc_html__('MxChat REST routes registered', 'mxchat'));
212		-}
213		-
214		-/**
215		- * Verify valid chat session
216		- */
217		-public function verify_chat_session($request) {
218		- $session_id = $request->get_param('session_id');
219		- if (empty($session_id)) {
220		- //error_log(esc_html__('Empty session ID in chat request', 'mxchat'));
221		- return false;
222		- }
223		-
224		- $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
225		- return $chat_mode === 'agent';
226		-}
227		-
228		-/**
229		- * Verify request is coming from Slack.
230		- *
231		- * @param WP_REST_Request $request
232		- * @return bool True if valid, false otherwise.
233		- */
234		-public function verify_slack_request($request) {
235		- // Get the Slack signing secret from your plugin options
236		- $valid_key = $this->options['live_agent_secret_key'] ?? '';
237		-
238		- if (empty($valid_key)) {
239		- //error_log(esc_html__('Slack signing secret not configured', 'mxchat'));
240		- return false;
241		- }
242		-
243		- $timestamp = $request->get_header('X-Slack-Request-Timestamp');
244		- $slack_signature = $request->get_header('X-Slack-Signature');
245		-
246		- // Verify timestamp to prevent replay attacks
247		- if (abs(time() - intval($timestamp)) > 300) {
248		- //error_log(esc_html__('Slack request timestamp too old', 'mxchat'));
249		- return false;
250		- }
251		-
252		- // Get raw request body
253		- $request_body = file_get_contents('php://input');
254		-
255		- // Create the signature base string
256		- $sig_basestring = "v0:{$timestamp}:{$request_body}";
257		-
258		- // Calculate expected signature
259		- $my_signature = 'v0=' . hash_hmac('sha256', $sig_basestring, $valid_key);
260		-
261		- // Compare signatures
262		- return hash_equals($my_signature, $slack_signature);
263		-}
264		-public function mxchat_stream_events(WP_REST_Request $request) {
265		- header('Content-Type: text/event-stream');
266		- header('Cache-Control: no-cache');
267		- header('Connection: keep-alive');
268		-
269		- $session_id = sanitize_text_field($request->get_param('session_id'));
270		- $last_seen_id = sanitize_text_field($request->get_param('last_seen_id')) ?: '';
271		-
272		- if (empty($session_id)) {
273		- echo esc_html__("event: error\ndata: ", 'mxchat') . esc_html__('Missing session_id', 'mxchat') . "\n\n";
274		- flush();
275		- exit;
276		- }
277		-
278		- $history = get_option("mxchat_history_{$session_id}", []);
279		-
280		- // Filter only new messages
281		- $new_messages = array_filter($history, function ($message) use ($last_seen_id) {
282		- return !empty($message['id']) && $message['id'] > $last_seen_id;
283		- });
284		-
285		- // Send new messages if available
286		- if (!empty($new_messages)) {
287		- echo esc_html__("event: newMessages\ndata: ", 'mxchat') . json_encode(array_values($new_messages)) . "\n\n";
288		- } else {
289		- // Keep the connection alive
290		- echo esc_html__("event: keepAlive\ndata: ", 'mxchat') . "{}\n\n";
291		- }
292		- flush();
293		- exit;
294		-}
295		-
296		-
297		-
298		-
299		-private function mxchat_save_chat_message($session_id, $role, $message) {
300		- global $wpdb;
301		-
302		- $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
303		- //error_log("[DEBUG] mxchat_save_chat_message -> START for session_id: {$session_id}, role: {$role}");
304		-
305		- // 1) Extract agent name if present
306		- $agent_name = '';
307		- if (preg_match('/^Agent: (.*?) - /', $message, $matches)) {
308		- $agent_name = $matches[1];
309		- $message = str_replace("Agent: $agent_name - ", '', $message);
310		-
311		- $session_meta_key = "mxchat_agent_name_{$session_id}";
312		- if (empty(get_option($session_meta_key))) {
313		- update_option($session_meta_key, $agent_name);
314		- //error_log("[DEBUG] mxchat_save_chat_message -> Stored agent_name in option: {$session_meta_key} => {$agent_name}");
315		- }
316		- }
317		-
318		- // 2) Generate unique message_id
319		- $message_id = uniqid();
320		- //error_log("[DEBUG] mxchat_save_chat_message -> Generated message_id: {$message_id}");
321		-
322		- // 3) Determine user_id
323		- $user_id = is_user_logged_in() ? get_current_user_id() : 0;
324		-
325		- // 4) Determine user_identifier
326		- $user_identifier = $agent_name
327		- ? $agent_name
328		- : MxChat_User::mxchat_get_user_identifier();
329		-
330		- // 5) Determine displayed_name
331		- $user_email = MxChat_User::mxchat_get_user_email();
332		- $displayed_name = $agent_name ? $agent_name : ($user_email ?: $user_identifier);
333		-
334		- // 6) Check for a saved email in wp_options
335		- $email_option_key = "mxchat_email_{$session_id}";
336		- $saved_email = get_option($email_option_key);
337		- //error_log("[DEBUG] mxchat_save_chat_message -> Checking wp_options for email_option_key: {$email_option_key}, found: {$saved_email}");
338		-
339		- // If found, update DB user_email
340		- if ($saved_email) {
341		- $update_res = $wpdb->update(
342		- $table_name,
343		- ['user_email' => $saved_email],
344		- ['session_id' => $session_id],
345		- ['%s'],
346		- ['%s']
347		- );
348		- //error_log("[DEBUG] mxchat_save_chat_message -> Attempted DB user_email update for session_id {$session_id}. update_res: {$update_res}");
349		- }
350		-
351		- // 7) Save to session history in wp_options
352		- $history_key = "mxchat_history_{$session_id}";
353		- $history = get_option($history_key, []);
354		- $history[] = [
355		- 'id' => $message_id,
356		- 'role' => $role,
357		- 'content' => $message,
358		- 'timestamp' => round(microtime(true) * 1000),
359		- 'agent_name' => $displayed_name,
360		- ];
361		- update_option($history_key, $history);
362		- //error_log("[DEBUG] mxchat_save_chat_message -> Updated session history in option: {$history_key}");
363		-
364		- // 8) Save the message to DB (INSERT)
365		- $insert_data = [
366		- 'user_id' => $user_id,
367		- 'user_identifier'=> $user_identifier,
368		- 'user_email' => $saved_email ?: $user_email,
369		- 'session_id' => $session_id,
370		- 'role' => $role,
371		- 'message' => $message,
372		- 'timestamp' => current_time('mysql', 1),
373		- ];
374		- $wpdb->insert($table_name, $insert_data);
375		- //error_log("[DEBUG] mxchat_save_chat_message -> Inserted message into DB. row_id: {$wpdb->insert_id}, data: " . print_r($insert_data, true));
376		-
377		- //error_log("[DEBUG] mxchat_save_chat_message -> END for session_id: {$session_id}");
378		- return $message_id;
379		-}
380		-
381		-public function mxchat_handle_save_email_and_response() {
382		- //error_log('[DEBUG] ---------- mxchat_handle_save_email_and_response START ----------');
383		-
384		- // Validate nonce
385		- if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
386		- error_log(esc_html__('[ERROR] Invalid nonce in mxchat_handle_save_email_and_response', 'mxchat'));
387		- wp_send_json_error(['message' => esc_html__('Invalid nonce.', 'mxchat')]);
388		- wp_die();
389		- }
390		-
391		- $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
392		- $email = isset($_POST['email']) ? sanitize_email($_POST['email']) : '';
393		-
394		- //error_log("[DEBUG] handle_save_email_and_response -> session_id: {$session_id}, email: {$email}");
395		-
396		- if (empty($session_id) || empty($email)) {
397		- //error_log("[ERROR] Missing session_id or email: session_id={$session_id}, email={$email}");
398		- wp_send_json_error(['message' => esc_html__('Session ID or email is missing.', 'mxchat')]);
399		- wp_die();
400		- }
401		-
402		- // 1) Always store in wp_options
403		- $option_key = "mxchat_email_{$session_id}";
404		- update_option($option_key, $email);
405		- //error_log("[DEBUG] handle_save_email_and_response -> updated option: {$option_key} => {$email}");
406		-
407		- // 2) (Optional) Also store in DB if a row already exists
408		- global $wpdb;
409		- $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
410		-
411		- // Make sure we have a valid placeholder in prepare
412		- $sql = $wpdb->prepare("SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s", $session_id);
413		- $session_count = $wpdb->get_var($sql);
414		-
415		- //error_log("[DEBUG] handle_save_email_and_response -> session_count for {$session_id}: {$session_count} (SQL: {$sql})");
416		-
417		- if ($session_count) {
418		- // Update user_email if row(s) exist
419		- $update_sql = $wpdb->prepare(
420		- "UPDATE {$table_name} SET user_email = %s WHERE session_id = %s",
421		- $email,
422		- $session_id
423		- );
424		- $wpdb->query($update_sql);
425		- //error_log("[DEBUG] handle_save_email_and_response -> DB updated: {$update_sql}");
426		- } else {
427		- //error_log("[INFO] handle_save_email_and_response -> No DB entry for {$session_id}, so email is only in wp_options.");
428		- }
429		-
430		- // Provide success response
431		- $bot_message = __('Thanks for providing your email! You can continue chatting now.', 'mxchat');
432		- //error_log("[DEBUG] handle_save_email_and_response -> success, returning bot_message: {$bot_message}");
433		- wp_send_json_success(['message' => $bot_message]);
434		- wp_die();
435		-}
436		-
437		-public function mxchat_check_email_provided() {
438		- //error_log('[DEBUG] ---------- mxchat_check_email_provided START ----------');
439		-
440		- if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
441		- //error_log('[ERROR] Invalid nonce in mxchat_check_email_provided');
442		- wp_send_json_error(['message' => esc_html__('Invalid nonce', 'mxchat')]);
443		- }
444		-
445		- $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
446		- if (empty($session_id)) {
447		- //error_log('[ERROR] No session ID provided in mxchat_check_email_provided');
448		- wp_send_json_error(['message' => esc_html__('No session ID provided', 'mxchat')]);
449		- }
450		-
451		- // Check if the user is logged in
452		- if (is_user_logged_in()) {
453		- $current_user = wp_get_current_user();
454		- //error_log("[DEBUG] User is logged in as {$current_user->user_email}");
455		- wp_send_json_success(['logged_in' => true, 'email' => $current_user->user_email]);
456		- }
457		-
458		- $option_key = "mxchat_email_{$session_id}";
459		- $stored_email = get_option($option_key, '');
460		-
461		- //error_log("[DEBUG] mxchat_check_email_provided -> Checking option: {$option_key}, found: {$stored_email}");
462		-
463		- if (!empty($stored_email)) {
464		- //error_log("[DEBUG] mxchat_check_email_provided -> Email found, returning success");
465		- wp_send_json_success(['email' => $stored_email]);
466		- } else {
467		- //error_log("[DEBUG] mxchat_check_email_provided -> No email found, returning error");
468		- wp_send_json_error(['message' => esc_html__('No email found', 'mxchat')]);
469		- }
470		-}
471		-
472		-
473		-// First, add this helper function to get the highest rate limit for a user's roles
474		-private function get_user_role_rate_limit($user_id) {
475		- //error_log(esc_html__("Checking rate limit for user ID: ", 'mxchat') . $user_id);
476		-
477		- if (!$user_id) {
478		- //error_log(esc_html__("No user ID provided, using logged-out limit: ", 'mxchat') . ($this->options['rate_limit_logged_out'] ?? '10'));
479		- return $this->options['rate_limit_logged_out'] ?? '10';
480		- }
481		-
482		- $user = get_userdata($user_id);
483		- if (!$user || !$user->roles) {
484		- //error_log(esc_html__("No user data or roles found, using logged-out limit: ", 'mxchat') . ($this->options['rate_limit_logged_out'] ?? '10'));
485		- return $this->options['rate_limit_logged_out'] ?? '10';
486		- }
487		-
488		- //error_log(esc_html__("User roles: ", 'mxchat') . print_r($user->roles, true));
489		- //error_log(esc_html__("Available role rate limits: ", 'mxchat') . print_r($this->options['role_rate_limits'] ?? [], true));
490		-
491		- $max_limit = 0;
492		- foreach ($user->roles as $role) {
493		- //error_log(esc_html__("Checking limit for role: ", 'mxchat') . $role);
494		- if (isset($this->options['role_rate_limits'][$role])) {
495		- $role_limit = $this->options['role_rate_limits'][$role];
496		- //error_log(esc_html__("Found limit for role ", 'mxchat') . $role . esc_html__(": ", 'mxchat') . $role_limit);
497		-
498		- if ($role_limit === 'unlimited') {
499		- //error_log(esc_html__("Returning unlimited for role: ", 'mxchat') . $role);
500		- return 'unlimited';
501		- }
502		-
503		- $max_limit = max($max_limit, (int)$role_limit);
504		- //error_log(esc_html__("Current max limit: ", 'mxchat') . $max_limit);
505		- } else {
506		- //error_log(esc_html__("No limit found for role: ", 'mxchat') . $role);
507		- }
508		- }
509		-
510		- $final_limit = $max_limit > 0 ? (string)$max_limit : '100';
511		- //error_log(esc_html__("Final rate limit: ", 'mxchat') . $final_limit);
512		- return $final_limit;
513		-}
514		-
515		-
516		-// Add this to your plugin's main PHP file
517		-public function mxchat_check_new_messages() {
518		- if (!isset($_POST['session_id']) || !isset($_POST['last_seen_id'])) {
519		- wp_send_json_error(['message' => 'Missing required parameters']);
520		- wp_die();
521		- }
522		-
523		- $session_id = sanitize_text_field($_POST['session_id']);
524		- $last_seen_id = sanitize_text_field($_POST['last_seen_id']);
525		-
526		- // Get chat history
527		- $history = get_option("mxchat_history_{$session_id}", []);
528		-
529		- if (empty($history)) {
530		- wp_send_json_success([
531		- 'hasNewMessages' => false,
532		- 'new_messages' => []
533		- ]);
534		- wp_die();
535		- }
536		-
537		- // Filter new messages
538		- $new_messages = array_filter($history, function($message) use ($last_seen_id) {
539		- return isset($message['id']) && $message['id'] > $last_seen_id;
540		- });
541		-
542		- // Sort by ID to ensure proper order
543		- usort($new_messages, function($a, $b) {
544		- return $a['id'] <=> $b['id'];
545		- });
546		-
547		- wp_send_json_success([
548		- 'hasNewMessages' => !empty($new_messages),
549		- 'new_messages' => array_values($new_messages),
550		- 'latestMessageId' => end($new_messages)['id'] ?? $last_seen_id
551		- ]);
552		- wp_die();
553		-}
554		-
555		-public function mxchat_handle_chat_request() {
556		- global $wpdb;
557		-
558		-
559		- // Check if MX Chat Moderation is active
560		- if (class_exists('MX_Chat_Moderation')) {
561		- // Get user email and IP
562		- $user_email = '';
563		- $user_ip = $_SERVER['REMOTE_ADDR'];
564		-
565		- // If user is logged in, get their email
566		- if (is_user_logged_in()) {
567		- $current_user = wp_get_current_user();
568		- $user_email = $current_user->user_email;
569		- }
570		-
571		- // Create ban handler instance
572		- $ban_handler = new MX_Chat_Ban_Handler();
573		-
574		- // Check if user is banned by IP
575		- if ($ban_handler->check_ban($user_ip, 'ip')) {
576		- wp_send_json([
577		- 'success' => false,
578		- 'message' => esc_html__('Access denied. Your IP address has been banned.', 'mxchat'),
579		- 'status' => 'banned'
580		- ]);
581		- wp_die();
582		- }
583		-
584		- // If user is logged in, also check email
585		- if (!empty($user_email) && $ban_handler->check_ban($user_email, 'email')) {
586		- wp_send_json([
587		- 'success' => false,
588		- 'message' => esc_html__('Access denied. Your email address has been banned.', 'mxchat'),
589		- 'status' => 'banned'
590		- ]);
591		- wp_die();
592		- }
593		- }
594		-
595		-
596		- // Reset fallback response at the start of each request
597		- $this->fallbackResponse = ['text' => '', 'html' => '', 'images' => []];
598		- $this->productCardHtml = '';
599		-
600		- // Get the actual WordPress user ID if logged in
601		- $is_logged_in = is_user_logged_in();
602		- if ($is_logged_in) {
603		- $user_id = get_current_user_id(); // This will get the actual WordPress user ID
604		- } else {
605		- // For logged-out users, use your existing identifier method
606		- $user_id = $this->mxchat_get_user_identifier();
607		- }
608		-
609		- // Get and sanitize the user identifier
610		- $user_id = sanitize_key($user_id);
611		-
612		- // Determine if user is logged in
613		- $is_logged_in = is_user_logged_in();
614		- //error_log("User logged in status: " . ($is_logged_in ? 'true' : 'false'));
615		-
616		- // Get rate limit based on user status
617		- // Get rate limit based on user status
618		- $rate_limit = $is_logged_in
619		- ? $this->get_user_role_rate_limit($user_id)
620		- : ($this->options['rate_limit_logged_out'] ?? '10');
621		-
622		- //error_log("Selected rate limit: " . $rate_limit);
623		-
624		- // Rest of your code remains the same
625		- // If rate limit is 'unlimited', skip rate limiting checks
626		- if ($rate_limit !== 'unlimited') {
627		- // Convert rate limit to integer
628		- $rate_limit = intval($rate_limit);
629		- // Setup rate limiting
630		- $rate_limit_transient_key = 'mxchat_chat_limit_' . $user_id;
631		- $chat_count = get_transient($rate_limit_transient_key);
632		- if ($chat_count === false) {
633		- // Initialize new counter if none exists
634		- $chat_count = 0;
635		- }
636		- // Check if user has exceeded their rate limit
637		- if ($chat_count >= $rate_limit) {
638		- // Get custom rate limit message or use default
639		- $rate_limit_message = isset($this->options['rate_limit_message'])
640		- ? $this->options['rate_limit_message']
641		- : esc_html__('Rate limit exceeded. Please try again later.', 'mxchat');
642		- // Replace placeholder if it exists in the message
643		- $rate_limit_message = str_replace(
644		- array('{limit}', '{count}', '{remaining}'),
645		- array($rate_limit, $chat_count, max(0, $rate_limit - $chat_count)),
646		- $rate_limit_message
647		- );
648		- wp_send_json([
649		- 'success' => false,
650		- 'message' => $rate_limit_message,
651		- 'status' => 'rate_limit_exceeded',
652		- 'limit' => $rate_limit,
653		- 'count' => $chat_count
654		- ]);
655		- wp_die();
656		- }
657		- // Increment the counter
658		- $chat_count++;
659		- // Store the updated count with 24-hour expiration
660		- set_transient($rate_limit_transient_key, $chat_count, DAY_IN_SECONDS);
661		- }
662		-
663		- // Rest of your existing code...
664		- $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
665		- //error_log("Session ID: $session_id");
666		-
667		- if (empty($session_id)) {
668		- //error_log("Error: Session ID is missing.");
669		- wp_send_json_error(esc_html__('Session ID is missing.', 'mxchat'));
670		- wp_die();
671		- }
672		-
673		- // Validate and sanitize the incoming message
674		- if (empty($_POST['message'])) {
675		- //error_log("Error: No message received.");
676		- wp_send_json_error(esc_html__('No message received.', 'mxchat'));
677		- wp_die();
678		- }
679		-
680		-
681		-// Modify the message sanitization to preserve PHP tags in code blocks
682		-$allowed_tags = [
683		- 'pre' => [],
684		- 'code' => ['class' => true],
685		- 'span' => ['class' => true],
686		- 'div' => ['class' => true],
687		-];
688		-
689		-// First preserve code blocks
690		-$message = preg_replace_callback('/<pre><code.*?>.*?<\/code><\/pre>/s', function($matches) {
691		- return htmlspecialchars_decode($matches[0]);
692		-}, $_POST['message']);
693		-
694		-// Then apply sanitization
695		-$message = wp_kses($message, $allowed_tags);
696		-
697		-// Decode code blocks
698		-$message = preg_replace_callback('/(&lt;pre&gt;&lt;code.*?&gt;.*?&lt;\/code&gt;&lt;\/pre&gt;)/s', function($matches) {
699		- return htmlspecialchars_decode($matches[1]);
700		-}, $message);
701		-
702		-$message = trim($message);
703		-
704		-// Preserve code blocks from markdown conversion
705		-$message = preg_replace('/```(\w+)?\s*([\s\S]+?)```/s', '<pre><code class="$1">$2</code></pre>', $message);
706		-
707		- // Save the user's message
708		- $this->mxchat_save_chat_message($session_id, 'user', $message);
709		-
710		- // Check if the message is an email address
711		- if (is_email($message)) {
712		- // Add the email to Loops
713		- $this->add_email_to_loops($message);
714		-
715		- // Send success response
716		- $response_message = $this->options['email_capture_response'] ??
717		- esc_html__('Thank you! Your coupon is on the way!', 'mxchat');
718		-
719		- wp_send_json([
720		- 'success' => true,
721		- 'status' => 'email_captured',
722		- 'message' => $response_message
723		- ]);
724		- wp_die();
725		- }
726		-
727		- $intent_info = '';
728		-
729		- // Check chat mode
730		- $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
731		- //error_log("Chat Mode: $chat_mode");
732		-
733		- // Handle agent mode
734		- if ($chat_mode === 'agent') {
735		- // First, check for switch intent before doing anything else
736		- $intent_matched = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
737		-
738		- // If we matched an intent and it's the switch intent, handle it
739		- if ($intent_matched && !empty($this->fallbackResponse['text'])) {
740		- //error_log("Switch to chatbot intent detected");
741		-
742		- // Update chat mode first
743		- update_option("mxchat_mode_{$session_id}", 'ai');
744		-
745		- // Clear any existing PDF context to start fresh
746		- $this->clear_pdf_transients($session_id);
747		-
748		- // Prepare clean switch response
749		- $response_data = [
750		- 'text' => $this->fallbackResponse['text'],
751		- 'html' => '',
752		- 'session_id' => $session_id,
753		- 'chat_mode' => 'ai'
754		- ];
755		-
756		- // Save the mode switch message
757		- $this->mxchat_save_chat_message($session_id, 'system', esc_html__('Switched to AI chat mode', 'mxchat'));
758		- $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['text']);
759		-
760		- // Send response and exit
761		- wp_send_json($response_data);
762		- wp_die();
763		- } elseif (!$intent_matched) {
764		- // No intent matched, handle live agent message
765		- try {
766		- $this->mxchat_send_user_message_to_agent($message, $user_id, $session_id);
767		- //error_log("Message sent to agent.");
768		-
769		- wp_send_json_success([
770		- 'status' => 'waiting_for_agent',
771		- 'message' => esc_html__('Message sent to live agent.', 'mxchat')
772		- ]);
773		- } catch (\Exception $e) {
774		- //error_log("Error sending message to agent: " . $e->getMessage());
775		- wp_send_json_error(esc_html__('Failed to send message to agent', 'mxchat'));
776		- }
777		- wp_die();
778		- }
779		- }
780		-
781		- // Step 1: Check for new PDF URL in the message
782		- if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
783		- $new_pdf_url = $matches[0];
784		-
785		- // Check if this is likely a PDF-related request
786		- $pdf_keywords = ['pdf', 'document', 'read', 'analyze'];
787		- $is_pdf_request = false;
788		-
789		- foreach ($pdf_keywords as $keyword) {
790		- if (stripos($message, $keyword) !== false) {
791		- $is_pdf_request = true;
792		- break;
793		- }
794		- }
795		-
796		- // If it looks like a PDF request or we're waiting for a PDF URL
797		- if ($is_pdf_request || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
798		- // Validate HTTPS
799		- if (wp_http_validate_url($new_pdf_url) && parse_url($new_pdf_url, PHP_URL_SCHEME) === 'https') {
800		- // Extract filename from URL
801		- $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
802		-
803		- // Clear previous PDF transients
804		- $this->clear_pdf_transients($session_id);
805		-
806		- // Process new PDF
807		- $max_pages = $this->options['pdf_max_pages'] ?? 69;
808		- $embeddings = $this->fetch_and_split_pdf_pages($new_pdf_url, $max_pages);
809		-
810		- if ($embeddings === 'too_many_pages') {
811		- $error_text = sprintf(
812		- $this->options['pdf_intent_error_text'] ??
813		- esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
814		- $max_pages
815		- );
816		- $this->fallbackResponse['text'] = $error_text;
817		- } elseif ($embeddings) {
818		- // Store new PDF information
819		- // Create a more meaningful filename from URL
820		- $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
821		-
822		- // If the filename is generic (like results_download.php), create a more descriptive one
823		- if (in_array($pdf_filename, ['results_download.php', 'download.php', 'view.php', 'pdf.php']) ||
824		- strpos($pdf_filename, '.php') !== false) {
825		- // Create a timestamp-based name
826		- $pdf_filename = 'Document_' . date('Y-m-d_H-i') . '.pdf';
827		- }
828		-
829		- set_transient('mxchat_pdf_url_' . $session_id, $new_pdf_url, HOUR_IN_SECONDS);
830		- set_transient('mxchat_pdf_filename_' . $session_id, $pdf_filename, HOUR_IN_SECONDS);
831		- set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
832		- set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
833		-
834		- $success_text = $this->options['pdf_intent_success_text'] ??
835		- esc_html__("I've processed the new PDF '{$pdf_filename}'. What questions do you have about it?", 'mxchat');
836		-
837		- // Return success with filename for UI update
838		- wp_send_json([
839		- 'success' => true,
840		- 'message' => $success_text,
841		- 'data' => [
842		- 'filename' => $pdf_filename
843		- ]
844		- ]);
845		- wp_die();
846		- } else {
847		- $error_text = $this->options['pdf_intent_error_text'] ??
848		- esc_html__("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
849		- $this->fallbackResponse['text'] = $error_text;
850		- }
851		-
852		- wp_send_json([
853		- 'success' => false,
854		- 'message' => $this->fallbackResponse['text']
855		- ]);
856		- wp_die();
857		- }
858		- }
859		- }
860		-
861		- // Step 2: Detect intent and handle intent-based responses
862		- $intent_matched = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
863		- //error_log("Intent Matched: " . ($intent_matched ? "Yes" : "No"));
864		-
865		- // Step 3: If intent is matched and handled, respond immediately
866		- if ($intent_matched && (!empty($this->fallbackResponse['text']) || !empty($this->fallbackResponse['html']))) {
867		- //error_log("Intent response triggered.");
868		- $response_data = [
869		- 'text' => $this->fallbackResponse['text'],
870		- 'html' => $this->fallbackResponse['html'],
871		- 'session_id' => $session_id
872		- ];
873		- $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['text'] . $this->fallbackResponse['html']);
874		- wp_send_json($response_data);
875		- wp_die();
876		- }
877		-
878		- // If no intent matched or product not found, proceed with AI response
879		- //error_log("No matching intent or fallback. Generating AI response.");
880		-
881		- // Step 4: Generate AI response
882		- $conversation_history = $this->mxchat_fetch_conversation_history_for_ai($session_id);
883		- $this->mxchat_increment_chat_count();
884		-
885		- // Generate embedding for the user's query
886		- $user_message_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
887		- if (!is_array($user_message_embedding)) {
888		- //error_log("Failed to generate message embedding for session $session_id");
889		- wp_send_json_error(esc_html__('Error processing your message.', 'mxchat'));
890		- wp_die();
891		- }
892		-
893		- // Build context with both knowledge base and PDF content if available
894		- $context_content = "User asked: '{$message}'\n\n";
895		-
896		- // Get relevant content from knowledge base
897		- $relevant_content = $this->mxchat_find_relevant_content($user_message_embedding);
898		- if (!empty($relevant_content)) {
899		- $context_content .= "Relevant content from knowledge database:\n" . $relevant_content . "\n\n";
900		- }
901		-
902		-
903		- // Check for and include PDF content
904		- $pdf_url = get_transient('mxchat_pdf_url_' . $session_id);
905		- $pdf_embeddings = get_transient('mxchat_pdf_embeddings_' . $session_id);
906		- $pdf_filename = get_transient('mxchat_pdf_filename_' . $session_id);
907		- if ($pdf_url && $pdf_embeddings && get_transient('mxchat_include_pdf_in_context_' . $session_id)) {
908		- $relevant_pdf_pages = $this->find_relevant_pdf_pages($user_message_embedding, $pdf_embeddings);
909		- if (!empty($relevant_pdf_pages)) {
910		- $context_content .= "Relevant content from PDF document '{$pdf_filename}':\n";
911		- foreach ($relevant_pdf_pages as $page_data) {
912		- $context_content .= "Page {$page_data['page_number']} of '{$pdf_filename}': {$page_data['text']}\n";
913		- }
914		- $context_content .= "\n";
915		- }
916		- }
917		-
918		- // Check for and include Word content
919		- $word_url = get_transient('mxchat_word_url_' . $session_id);
920		- $word_embeddings = get_transient('mxchat_word_embeddings_' . $session_id);
921		- $word_filename = get_transient('mxchat_word_filename_' . $session_id);
922		- if ($word_url && $word_embeddings && get_transient('mxchat_include_word_in_context_' . $session_id)) {
923		- $relevant_word_chunks = $this->word_handler->mxchat_find_relevant_word_chunks($user_message_embedding, $word_embeddings);
924		- if (!empty($relevant_word_chunks)) {
925		- $context_content .= "Relevant content from Word document '{$word_filename}':\n";
926		- foreach ($relevant_word_chunks as $chunk_data) {
927		- $context_content .= "Section {$chunk_data['chunk_number']} of '{$word_filename}': {$chunk_data['text']}\n";
928		- }
929		- $context_content .= "\n";
930		- }
931		- }
932		- // Generate the response using the full context
933		- $response = $this->mxchat_generate_response(
934		- $context_content,
935		- $this->options['api_key'],
936		- $this->options['xai_api_key'],
937		- $this->options['claude_api_key'],
938		- $this->options['deepseek_api_key'],
939		- $conversation_history
940		- );
941		-
942		- $this->mxchat_save_chat_message($session_id, 'bot', $response);
943		-
944		- // Step 5: Save additional content if available
945		- if (!empty($this->productCardHtml)) {
946		- $this->mxchat_save_chat_message($session_id, 'bot', $this->productCardHtml);
947		- }
948		-
949		- if (!empty($this->fallbackResponse['html'])) {
950		- $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['html']);
951		- }
952		-
953		- // Step 6: Return the response
954		- $response_data = [
955		- 'text' => $response,
956		- 'html' => !empty($this->productCardHtml) ? $this->productCardHtml : ($this->fallbackResponse['html'] ?? ''),
957		- 'session_id' => $session_id
958		- ];
959		-
960		- wp_send_json($response_data);
961		- wp_die();
962		-}
963		-
964		-// New function to check intents and invoke the callback function
965		-private function mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id) {
966		- global $wpdb;
967		- $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
968		-
969		- //error_log('🔍 MXCHAT DEBUG: Intent Check Started ==================');
970		- //error_log("🔍 MXCHAT DEBUG: Message: '$message'");
971		- //error_log("🔍 MXCHAT DEBUG: Chat Mode: $chat_mode");
972		-
973		- // Generate the user embedding
974		- //error_log('🔄 MXCHAT DEBUG: Generating user embedding');
975		- $user_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
976		- if (!is_array($user_embedding)) {
977		- //error_log('❌ MXCHAT DEBUG: Failed to generate user embedding');
978		- return false;
979		- }
980		- //error_log('✅ MXCHAT DEBUG: User embedding generated successfully');
981		-
982		- // Fetch intents from the database
983		- $table_name = $wpdb->prefix . 'mxchat_intents';
984		- if ($chat_mode === 'agent') {
985		- //error_log('🔍 MXCHAT DEBUG: Agent mode - fetching only chatbot switch intent');
986		- $query = $wpdb->prepare(
987		- "SELECT * FROM $table_name WHERE callback_function = %s",
988		- 'mxchat_handle_switch_to_chatbot_intent'
989		- );
990		- $intents = $wpdb->get_results($query);
991		- } else {
992		- //error_log('🔍 MXCHAT DEBUG: AI mode - fetching all intents');
993		- $intents = $wpdb->get_results("SELECT * FROM $table_name");
994		- }
995		-
996		- //error_log('🔍 MXCHAT DEBUG: Found ' . count($intents) . ' intents to check');
997		-
998		- if (empty($intents)) {
999		- //error_log('❌ MXCHAT DEBUG: No intents found in database');
1000		- return false;
1001		- }
1002		-
1003		- $highest_similarity = -INF;
1004		- $matched_intent = null;
1005		-
1006		- //error_log('📊 MXCHAT DEBUG: Intent Similarity Scores ==================');
1007		- foreach ($intents as $intent) {
1008		- //error_log("🔄 MXCHAT DEBUG: Checking intent: '{$intent->intent_label}' (callback: {$intent->callback_function})");
1009		-
1010		- $intent_embedding_serialized = $intent->embedding_vector;
1011		- $intent_embedding = $intent_embedding_serialized
1012		- ? unserialize($intent_embedding_serialized, ['allowed_classes' => false])
1013		- : null;
1014		-
1015		- if (!is_array($intent_embedding)) {
1016		- //error_log("❌ MXCHAT DEBUG: Invalid embedding for intent: {$intent->intent_label}");
1017		- continue;
1018		- }
1019		-
1020		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $intent_embedding);
1021		- $intent_threshold = isset($intent->similarity_threshold) ? $intent->similarity_threshold : 0.85;
1022		-
1023		-
1024		- if ($similarity >= $intent_threshold && $similarity > $highest_similarity) {
1025		- $highest_similarity = $similarity;
1026		- $matched_intent = $intent;
1027		- //error_log("✅ MXCHAT DEBUG: New best match: '{$intent->intent_label}' with similarity {$similarity}");
1028		- }
1029		- }
1030		- //error_log('📊 MXCHAT DEBUG: End Intent Scores ==================');
1031		-
1032		- if ($matched_intent) {
1033		- //error_log("🎯 MXCHAT DEBUG: Final Intent Match: '{$matched_intent->intent_label}'");
1034		- //error_log("🔄 MXCHAT DEBUG: Invoking callback: {$matched_intent->callback_function}");
1035		-
1036		- // If the callback is a method on this instance (core callback), call it directly
1037		- if (method_exists($this, $matched_intent->callback_function)) {
1038		- //error_log('🔍 MXCHAT DEBUG: Using direct method call for core callback');
1039		- $callback_result = call_user_func(
1040		- [$this, $matched_intent->callback_function],
1041		- $message,
1042		- $user_id,
1043		- $session_id,
1044		- $matched_intent,
1045		- $user_context // Add user context
1046		- );
1047		- } else {
1048		- //error_log('🔍 MXCHAT DEBUG: Using apply_filters for add-on callback');
1049		- // Otherwise, use apply_filters for add-on callbacks
1050		- $callback_result = apply_filters(
1051		- $matched_intent->callback_function,
1052		- false, // default return value
1053		- $message,
1054		- $user_id,
1055		- $session_id,
1056		- $matched_intent
1057		- );
1058		- }
1059		-
1060		- //error_log('🔍 MXCHAT DEBUG: Callback result type: ' . gettype($callback_result));
1061		- if ($callback_result !== false) {
1062		- //error_log('✅ MXCHAT DEBUG: Intent handled successfully');
1063		- $this->fallbackResponse = $callback_result;
1064		- return true;
1065		- }
1066		- //error_log('❌ MXCHAT DEBUG: Callback returned false');
1067		- } else {
1068		- //error_log('❌ MXCHAT DEBUG: No matching intent found');
1069		- }
1070		-
1071		- //error_log('🔍 MXCHAT DEBUG: Intent Check Completed ==================');
1072		- return false;
1073		-}
1074		-
1075		-
1076		-// Helper function to clear PDF and Word document related transients
1077		-private function clear_pdf_transients($session_id) {
1078		- // PDF transients
1079		- delete_transient('mxchat_pdf_url_' . $session_id);
1080		- delete_transient('mxchat_pdf_embeddings_' . $session_id);
1081		- delete_transient('mxchat_include_pdf_in_context_' . $session_id);
1082		- delete_transient('mxchat_waiting_for_pdf_url_' . $session_id);
1083		-
1084		- // Word document transients
1085		- delete_transient('mxchat_word_url_' . $session_id);
1086		- delete_transient('mxchat_word_filename_' . $session_id);
1087		- delete_transient('mxchat_word_embeddings_' . $session_id);
1088		- delete_transient('mxchat_include_word_in_context_' . $session_id);
1089		- delete_transient('mxchat_waiting_for_word_' . $session_id);
1090		-}
1091		-
1092		-
1093		-
1094		-//verified good
1095		-public function mxchat_handle_email_capture($message, $user_id, $session_id) {
1096		- // Log the message safely
1097		- //error_log("Triggered email capture intent for message: " . sanitize_text_field($message));
1098		-
1099		- // Initiate email capture flow
1100		- $response = esc_html($this->options['triggered_phrase_response'] ?? esc_html__("Would you like to join our mailing list? Please provide your email below.", 'mxchat'));
1101		-
1102		- set_transient('mxchat_email_capture_' . $user_id, true, 5 * MINUTE_IN_SECONDS);
1103		- $this->mxchat_save_chat_message($session_id, 'bot', $response);
1104		-
1105		- // Respond to the user
1106		- wp_send_json(['message' => $response]);
1107		- wp_die();
1108		-}
1109		-
1110		-//very good
1111		-public function mxchat_generate_image($message, $user_id, $session_id) {
1112		- // Prepare a prompt for DALL-E
1113		- $prompt = esc_html__('Create an image of ', 'mxchat') . sanitize_text_field($message);
1114		-
1115		- // Use the existing OpenAI API key
1116		- $openai_api_key = sanitize_text_field($this->options['api_key']);
1117		-
1118		- // Call DALL-E to generate an image
1119		- $image_response = $this->mxchat_generate_dalle_image($prompt, $openai_api_key);
1120		-
1121		- // Check if the response contains an image URL
1122		- if (isset($image_response['imageUrl'])) {
1123		- $image_url = esc_url_raw($image_response['imageUrl']);
1124		-
1125		- // Construct the HTML with a CSS class instead of inline styles
1126		- $response_html = '<img src="' . esc_url($image_url) . '" alt="' . esc_attr__('Generated Image', 'mxchat') . '" class="mxchat-generated-image" />';
1127		-
1128		- $response_text = esc_html__('Here is the image I generated:', 'mxchat');
1129		- } else {
1130		- $response_text = esc_html__("I'm sorry, but I couldn't generate an image based on your request.", 'mxchat');
1131		- $response_html = '';
1132		- //error_log("DALL-E image generation error: " . esc_html($image_response['error'] ?? 'Unknown error.'));
1133		- }
1134		-
1135		- // Save both text and HTML responses
1136		- $this->mxchat_save_chat_message($session_id, 'bot', $response_text . "\n" . $response_html);
1137		-
1138		- // Prepare the response data
1139		- $response_data = [
1140		- 'message' => $response_text,
1141		- 'html' => $response_html,
1142		- 'image_url' => $image_url ?? '',
1143		- ];
1144		-
1145		- // Send the JSON response
1146		- header('Content-Type: application/json; charset=' . get_option('blog_charset'));
1147		- echo json_encode($response_data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
1148		- wp_die();
1149		-}
1150		-private function mxchat_generate_dalle_image($prompt, $api_key, $model = 'dall-e-3', $timeout = 60) {
1151		- $api_url = 'https://api.openai.com/v1/images/generations';
1152		- $body = json_encode([
1153		- 'prompt' => sanitize_text_field($prompt),
1154		- 'n' => 1,
1155		- 'size' => '1024x1024',
1156		- 'model' => sanitize_text_field($model),
1157		- ]);
1158		-
1159		- $args = [
1160		- 'body' => $body,
1161		- 'headers' => [
1162		- 'Content-Type' => 'application/json',
1163		- 'Authorization' => 'Bearer ' . sanitize_text_field($api_key),
1164		- ],
1165		- 'method' => 'POST',
1166		- 'timeout' => absint($timeout),
1167		- ];
1168		-
1169		- $response = wp_remote_post($api_url, $args);
1170		-
1171		- if (is_wp_error($response)) {
1172		- //error_log("DALL-E request failed: " . $response->get_error_message());
1173		- return ['error' => esc_html__('Error generating image: ', 'mxchat') . $response->get_error_message()];
1174		- }
1175		-
1176		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
1177		-
1178		- if (isset($response_body['data'][0]['url'])) {
1179		- return ['imageUrl' => esc_url_raw($response_body['data'][0]['url'])];
1180		- } else {
1181		- //error_log("DALL-E response error: " . wp_remote_retrieve_body($response));
1182		- return ['error' => esc_html__('Failed to generate image.', 'mxchat')];
1183		- }
1184		-}
1185		-
1186		-/**
1187		- * Handle web search requests.
1188		- *
1189		- * Sends the refined search query to the Brave Search API and displays neatly formatted,
1190		- * styled search results. Results are cached for performance.
1191		- *
1192		- * @since 1.0.0
1193		- * @param string $message The user's search query.
1194		- * @param string $user_id The user identifier.
1195		- * @param string $session_id The current session ID.
1196		- * @return void
1197		- */
1198		-public function mxchat_handle_search_request( $message, $user_id, $session_id ) {
1199		- // Step 1: Interpret and refine the search query
1200		- $refined_search_query = $this->mxchat_interpret_search_query( $message );
1201		-
1202		- if ( empty( $refined_search_query ) ) {
1203		- $this->fallbackResponse = array(
1204		- 'text' => esc_html__( 'I apologize, but could you please rephrase your search request?', 'mxchat' ),
1205		- );
1206		- return;
1207		- }
1208		-
1209		- // Retrieve and validate API settings
1210		- $options = get_option( 'mxchat_options' );
1211		- $api_key = isset( $options['brave_api_key'] ) ? sanitize_text_field( $options['brave_api_key'] ) : '';
1212		- $results_count = isset( $options['brave_results_count'] ) ? absint( $options['brave_results_count'] ) : 5;
1213		-
1214		- if ( empty( $api_key ) ) {
1215		- $this->fallbackResponse = array(
1216		- 'text' => esc_html__( 'Search functionality is temporarily unavailable. Please try again later.', 'mxchat' ),
1217		- );
1218		- return;
1219		- }
1220		-
1221		- // Build the API request URL
1222		- $api_url = add_query_arg(
1223		- array(
1224		- 'q' => rawurlencode( $refined_search_query ),
1225		- 'count' => $results_count,
1226		- 'text_decorations' => 'true',
1227		- 'rich_data' => 'true',
1228		- ),
1229		- 'https://api.search.brave.com/res/v1/web/search'
1230		- );
1231		-
1232		- // Attempt to retrieve cached results first
1233		- $transient_key = 'mxchat_search_' . md5( $refined_search_query );
1234		- $results = get_transient( $transient_key );
1235		-
1236		- if ( false === $results ) {
1237		- // Fetch new results from the Brave Search API
1238		- $response = wp_remote_get(
1239		- $api_url,
1240		- array(
1241		- 'headers' => array(
1242		- 'Accept' => 'application/json',
1243		- 'Accept-Encoding' => 'gzip',
1244		- 'X-Subscription-Token'=> $api_key,
1245		- ),
1246		- 'timeout' => 10,
1247		- )
1248		- );
1249		-
1250		- if ( is_wp_error( $response ) ) {
1251		- $this->fallbackResponse = array(
1252		- 'text' => esc_html__( 'I encountered an error while searching. Please try again.', 'mxchat' ),
1253		- );
1254		- return;
1255		- }
1256		-
1257		- $results = json_decode( wp_remote_retrieve_body( $response ), true );
1258		-
1259		- if ( json_last_error() !== JSON_ERROR_NONE ) {
1260		- $this->fallbackResponse = array(
1261		- 'text' => esc_html__( 'I received an invalid response from the search service.', 'mxchat' ),
1262		- );
1263		- return;
1264		- }
1265		-
1266		- // Cache results for one hour
1267		- set_transient( $transient_key, $results, HOUR_IN_SECONDS );
1268		- }
1269		-
1270		- // Process and display results
1271		- if ( ! empty( $results['web']['results'] ) && is_array( $results['web']['results'] ) ) {
1272		- $html = $this->generate_search_results_html( $results['web']['results'], $refined_search_query );
1273		-
1274		- // Only return HTML (no large text summary)
1275		- $this->fallbackResponse = array(
1276		- 'html' => $html,
1277		- );
1278		-
1279		- // Save to chat history
1280		- $this->mxchat_save_chat_message( $session_id, 'bot', $html );
1281		- } else {
1282		- $this->fallbackResponse = array(
1283		- 'text' => sprintf(
1284		- esc_html__( 'I couldn\'t find any relevant results for "%s". Would you like to try different search terms?', 'mxchat' ),
1285		- esc_html( $refined_search_query )
1286		- ),
1287		- );
1288		- }
1289		-}
1290		-
1291		-
1292		-/**
1293		- * Format search results into a natural text summary.
1294		- *
1295		- * @since 1.0.0
1296		- * @param array $results The search results from the API.
1297		- * @param string $query The original search query.
1298		- * @return string The text summary of the top results.
1299		- */
1300		-private function format_search_results( $results, $query ) {
1301		- $summary = sprintf(
1302		- esc_html__( 'Here are the most relevant results for "%s":', 'mxchat' ),
1303		- esc_html( $query )
1304		- ) . "\n\n";
1305		-
1306		- $max_results = min( count( $results ), 3 );
1307		- for ( $i = 0; $i < $max_results; $i++ ) {
1308		- $result = $results[ $i ];
1309		- $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
1310		- $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
1311		-
1312		- // Append title and description to the summary
1313		- $summary .= sprintf(
1314		- "%s\n%s\n\n",
1315		- esc_html( $title ),
1316		- esc_html( $description )
1317		- );
1318		- }
1319		-
1320		- return $summary;
1321		-}
1322		-
1323		-/**
1324		- * Generate HTML markup for search results.
1325		- *
1326		- * @since 1.0.0
1327		- * @param array $results The search results from the API.
1328		- * @param string $query The user-refined query.
1329		- * @return string The HTML markup for displaying the results.
1330		- */
1331		-private function generate_search_results_html( $results, $query ) {
1332		- ob_start();
1333		- ?>
1334		- <div class="mxchat-search-results">
1335		- <?php foreach ( $results as $result ) :
1336		- $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
1337		- $url = isset( $result['url'] ) ? esc_url( $result['url'] ) : '#';
1338		- $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
1339		- $favicon = isset( $result['meta_url']['favicon'] ) ? esc_url( $result['meta_url']['favicon'] ) : '';
1340		- $thumbnail = isset( $result['thumbnail']['src'] ) ? esc_url( $result['thumbnail']['src'] ) : '';
1341		- $domain = parse_url( $url, PHP_URL_HOST );
1342		- ?>
1343		- <div class="mxchat-search-item">
1344		- <div class="mxchat-search-header">
1345		- <?php if ( $favicon ) : ?>
1346		- <img
1347		- src="<?php echo esc_url( $favicon ); ?>"
1348		- class="mxchat-site-icon"
1349		- alt="<?php echo esc_attr__( 'Site icon', 'mxchat' ); ?>"
1350		- width="16"
1351		- height="16"
1352		- />
1353		- <?php endif; ?>
1354		- <div class="mxchat-site-url"><?php echo esc_html( $domain ); ?></div>
1355		- </div>
1356		-
1357		- <div class="mxchat-search-content">
1358		- <h3 class="mxchat-search-title">
1359		- <a href="<?php echo esc_url( $url ); ?>"
1360		- target="_blank"
1361		- rel="noopener noreferrer"
1362		- >
1363		- <?php echo esc_html( $title ); ?>
1364		- </a>
1365		- </h3>
1366		-
1367		- <?php if ( $thumbnail ) : ?>
1368		- <div class="mxchat-search-thumbnail">
1369		- <img
1370		- src="<?php echo esc_url( $thumbnail ); ?>"
1371		- alt="<?php echo esc_attr__( 'Thumbnail image', 'mxchat' ); ?>"
1372		- loading="lazy"
1373		- />
1374		- </div>
1375		- <?php endif; ?>
1376		-
1377		- <div class="mxchat-search-description">
1378		- <?php echo esc_html( $description ); ?>
1379		- </div>
1380		- </div>
1381		- </div>
1382		- <?php endforeach; ?>
1383		- </div>
1384		- <?php
1385		- return ob_get_clean();
1386		-}
1387		-
1388		-
1389		-//very good
1390		-public function mxchat_handle_image_search_request($message, $user_id, $session_id) {
1391		-
1392		- // Step 1: Interpret the search query for better results
1393		- $refined_search_query = $this->mxchat_interpret_search_query($message);
1394		-
1395		-
1396		- // If no query was interpreted, return a fallback message
1397		- if (empty($refined_search_query)) {
1398		- $this->fallbackResponse = [
1399		- 'text' => __("I'm sorry, I couldn't interpret your search query. Please specify what you'd like to see images of.", 'mxchat'),
1400		- 'html' => "",
1401		- ];
1402		- return;
1403		- }
1404		-
1405		- // Brave API URL
1406		- $api_url = 'https://api.search.brave.com/res/v1/images/search';
1407		-
1408		- // Retrieve Brave API settings
1409		- $options = get_option('mxchat_options');
1410		- $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
1411		-
1412		- if (empty($api_key)) {
1413		-/*
1414		- if (defined('WP_DEBUG') && WP_DEBUG) {
1415		- error_log("Brave API key is missing.");
1416		- }
1417		-*/
1418		-
1419		- $this->fallbackResponse = [
1420		- 'text' => __("API key is not configured. Please set it in the Brave Search Settings.", 'mxchat'),
1421		- 'html' => "",
1422		- ];
1423		- return;
1424		- }
1425		-
1426		- $image_count = isset($options['brave_image_count']) ? intval($options['brave_image_count']) : 4;
1427		- $safe_search = isset($options['brave_safe_search']) ? sanitize_text_field($options['brave_safe_search']) : 'strict';
1428		-
1429		- // Append query parameters based on settings
1430		- $api_url = add_query_arg([
1431		- 'q' => rawurlencode($refined_search_query),
1432		- 'count' => $image_count,
1433		- 'safesearch' => $safe_search,
1434		- ], $api_url);
1435		-
1436		-/*
1437		- // Log the final API URL for the search
1438		- if (defined('WP_DEBUG') && WP_DEBUG) {
1439		- error_log("Final API URL for Brave Image Search: " . esc_url_raw($api_url));
1440		- }
1441		-*/
1442		-
1443		-
1444		- // Implement caching
1445		- $transient_key = 'mxchat_image_search_' . md5($refined_search_query);
1446		- $body = get_transient($transient_key);
1447		-
1448		- if (false === $body) {
1449		- $args = [
1450		- 'headers' => [
1451		- 'Accept' => 'application/json',
1452		- 'Accept-Encoding' => 'gzip',
1453		- 'X-Subscription-Token' => $api_key,
1454		- ],
1455		- 'timeout' => 10,
1456		- ];
1457		-
1458		- $response = wp_remote_get($api_url, $args);
1459		-
1460		- if (is_wp_error($response)) {
1461		-/*
1462		- if (defined('WP_DEBUG') && WP_DEBUG) {
1463		- error_log("Brave Image API request failed: " . $response->get_error_message());
1464		- }
1465		-*/
1466		-
1467		- $this->fallbackResponse = [
1468		- 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
1469		- 'html' => "",
1470		- ];
1471		- return;
1472		- }
1473		-
1474		- $body = json_decode(wp_remote_retrieve_body($response), true);
1475		- set_transient($transient_key, $body, HOUR_IN_SECONDS);
1476		- }
1477		-
1478		- // Process the API response
1479		- if (isset($body['results']) && is_array($body['results']) && count($body['results']) > 0) {
1480		- $html_output = '<div class="mxchat-image-gallery">';
1481		-
1482		- foreach ($body['results'] as $image) {
1483		- $image_url = isset($image['url']) ? esc_url($image['url']) : '';
1484		- $thumbnail_url = isset($image['thumbnail']['src']) ? esc_url($image['thumbnail']['src']) : '';
1485		- $title = isset($image['title']) ? esc_html($image['title']) : esc_html__('Image', 'mxchat');
1486		-
1487		- if ($image_url && $thumbnail_url) {
1488		- $html_output .= '<div class="mxchat-image-item">';
1489		- $html_output .= '<strong class="mxchat-image-title">' . $title . '</strong>';
1490		- $html_output .= '<a href="' . $image_url . '" target="_blank" rel="noopener noreferrer" class="mxchat-image-link">';
1491		- $html_output .= '<img src="' . $thumbnail_url . '" alt="' . $title . '" class="mxchat-image-thumbnail">';
1492		- $html_output .= '</a></div>';
1493		- }
1494		- }
1495		-
1496		- $html_output .= '</div>';
1497		-
1498		- $this->fallbackResponse = [
1499		- 'text' => "",
1500		- 'html' => $html_output,
1501		- ];
1502		-
1503		- // Save response in chat history
1504		- $this->mxchat_save_chat_message($session_id, 'bot', $html_output);
1505		-
1506		- } else {
1507		-/*
1508		- if (defined('WP_DEBUG') && WP_DEBUG) {
1509		- error_log("Brave Image API response did not contain expected data structure or was empty: " . print_r($body, true));
1510		- }
1511		-*/
1512		-
1513		- $this->fallbackResponse = [
1514		- 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
1515		- 'html' => "",
1516		- ];
1517		- }
1518		-}
1519		-public function mxchat_interpret_search_query($user_query) {
1520		- $system_prompt = esc_html__("Interpret the user's request to provide only the essential keywords or phrases for image searching. Remove conversational language, politeness, or extra context. Return a concise search query that doesn't lose any of the original meaning.", 'mxchat');
1521		-
1522		- // Retrieve OpenAI API key using 'api_key' as the option key
1523		- $api_key = isset($this->options['api_key']) ? sanitize_text_field($this->options['api_key']) : sanitize_text_field(get_option('mxchat_options')['api_key']);
1524		-
1525		- /*
1526		- // Log the API key check, without exposing the key
1527		- if (defined('WP_DEBUG') && WP_DEBUG) {
1528		- error_log("Retrieved OpenAI API Key: " . ($api_key ? "Present" : "Missing"));
1529		- }
1530		- */
1531		-
1532		- if (empty($api_key)) {
1533		- //error_log("OpenAI API key is missing.");
1534		- return sanitize_text_field($user_query); // Default to the original query if API key is missing
1535		- }
1536		-
1537		- $url = 'https://api.openai.com/v1/chat/completions';
1538		- $args = [
1539		- 'headers' => [
1540		- 'Authorization' => 'Bearer ' . $api_key,
1541		- 'Content-Type' => 'application/json',
1542		- ],
1543		- 'body' => wp_json_encode([
1544		- 'model' => 'gpt-3.5-turbo',
1545		- 'messages' => [
1546		- ['role' => 'system', 'content' => $system_prompt],
1547		- ['role' => 'user', 'content' => sanitize_text_field($user_query)],
1548		- ],
1549		- 'temperature' => 0.2,
1550		- 'max_tokens' => 20,
1551		- ]),
1552		- 'method' => 'POST',
1553		- ];
1554		-
1555		- $response = wp_remote_post($url, $args);
1556		-
1557		- if (is_wp_error($response)) {
1558		- //error_log("OpenAI request failed: " . $response->get_error_message());
1559		- return sanitize_text_field($user_query); // Fallback to the original query if there's an error
1560		- }
1561		-
1562		- $body = json_decode(wp_remote_retrieve_body($response), true);
1563		-
1564		- // Check for a valid response and sanitize output
1565		- if (isset($body['choices'][0]['message']['content'])) {
1566		- $interpreted_query = sanitize_text_field(trim($body['choices'][0]['message']['content']));
1567		-
1568		- /*
1569		- // Log the interpreted query for debugging
1570		- if (defined('WP_DEBUG') && WP_DEBUG) {
1571		- error_log("Interpreted search query: " . $interpreted_query);
1572		- }
1573		- */
1574		-
1575		- return $interpreted_query;
1576		- } else {
1577		- //error_log("Unexpected API response format: " . print_r($body, true));
1578		- return sanitize_text_field($user_query);
1579		- }
1580		-}
1581		-
1582		-
1583		-
1584		-private function find_product_in_message($message) {
1585		- global $wpdb;
1586		-
1587		- // Get embedding for the search query
1588		- $query_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
1589		- if (!is_array($query_embedding)) {
1590		- return null;
1591		- }
1592		-
1593		- // Get relevant content as string
1594		- $relevant_content = $this->mxchat_find_relevant_products($query_embedding);
1595		- if (empty($relevant_content)) {
1596		- // Return null to indicate no results and set fallback response
1597		- $this->fallbackResponse['text'] = esc_html__("I couldn't find any relevant products based on your query. Could you please be more specific about the product you're looking for?", 'mxchat');
1598		- return null;
1599		- }
1600		-
1601		- // Extract product URLs from the content
1602		- preg_match_all('/https?:\/\/[^\s<>"\']+?\/product\/[^\s<>"\']+/', $relevant_content, $matches);
1603		-
1604		- if (!empty($matches[0])) {
1605		- // Try each URL found
1606		- foreach ($matches[0] as $url) {
1607		- // Clean the URL
1608		- $url = rtrim($url, '/."\']');
1609		-
1610		- // Get the product slug
1611		- $path = parse_url($url, PHP_URL_PATH);
1612		- $slug = basename(rtrim($path, '/'));
1613		-
1614		- // Find product by slug
1615		- $args = array(
1616		- 'post_type' => 'product',
1617		- 'post_status' => 'publish',
1618		- 'name' => $slug,
1619		- 'posts_per_page' => 1
1620		- );
1621		-
1622		- $products = get_posts($args);
1623		-
1624		- if (!empty($products)) {
1625		- $product_id = $products[0]->ID;
1626		- $product = wc_get_product($product_id);
1627		-
1628		- if ($product && $product->is_purchasable()) {
1629		- return $product_id;
1630		- }
1631		- }
1632		- }
1633		- }
1634		-
1635		- // Fallback: Look for product names in the content
1636		- $products = wc_get_products([
1637		- 'status' => 'publish',
1638		- 'limit' => -1,
1639		- 'return' => 'all'
1640		- ]);
1641		-
1642		- foreach ($products as $product) {
1643		- $name = $product->get_name();
1644		- if (stripos($relevant_content, $name) !== false) {
1645		- if ($product->is_purchasable()) {
1646		- return $product->get_id();
1647		- }
1648		- }
1649		- }
1650		-
1651		- // If no product is found after all checks, set the fallback response
1652		- $this->fallbackResponse['text'] = esc_html__("I couldn't find any relevant products based on your query. Try to be more specific", 'mxchat');
1653		- return null;
1654		-}
1655		-
1656		-// New method to handle intent responses
1657		-private function generate_intent_response($context_content, $session_id) {
1658		- // Convert the context array to a structured string for the AI
1659		- $context_string = $this->format_intent_context($context_content);
1660		-
1661		- // Generate AI response using the context
1662		- $response = $this->mxchat_generate_response(
1663		- $context_string,
1664		- $this->options['api_key'],
1665		- $this->options['xai_api_key'],
1666		- $this->options['claude_api_key'],
1667		- $this->options['deepseek_api_key'],
1668		- $this->mxchat_fetch_conversation_history_for_ai($session_id)
1669		- );
1670		-
1671		- $this->fallbackResponse['text'] = $response;
1672		- return true;
1673		-}
1674		-// Helper method to format intent context
1675		-private function format_intent_context($context) {
1676		- $context_string = esc_html__("INTENT CONTEXT:\n", 'mxchat');
1677		-
1678		- switch ($context['intent']) {
1679		- case 'add_to_cart':
1680		- if ($context['status'] === 'success') {
1681		- $context_string .= esc_html__("Action: Successfully added product to cart\n", 'mxchat');
1682		- $context_string .= sprintf(esc_html__("Product: %s\n", 'mxchat'), $context['product']['name']);
1683		- $context_string .= esc_html__("Available actions: ", 'mxchat') . implode(', ', $context['available_actions']) . "\n";
1684		- $context_string .= sprintf(esc_html__("Cart URL: %s\n", 'mxchat'), $context['cart_url']);
1685		- $context_string .= esc_html__("\nPlease inform the user of the successful addition and their available options.", 'mxchat');
1686		- } else {
1687		- $context_string .= esc_html__("Action: Failed to add product to cart\n", 'mxchat');
1688		- $context_string .= sprintf(esc_html__("Reason: %s\n", 'mxchat'), $context['reason']);
1689		- switch ($context['reason']) {
1690		- case 'woocommerce_not_available':
1691		- $context_string .= esc_html__("\nPlease inform the user that shopping features are not available.", 'mxchat');
1692		- break;
1693		- case 'no_product_context':
1694		- $context_string .= esc_html__("\nPlease ask the user to specify which product they want to add.", 'mxchat');
1695		- break;
1696		- case 'product_not_found':
1697		- $context_string .= esc_html__("\nPlease inform the user that the product couldn't be found and ask them to try again.", 'mxchat');
1698		- break;
1699		- case 'add_to_cart_failed':
1700		- $context_string .= esc_html__("\nPlease apologize to the user and suggest they try again or ask for assistance.", 'mxchat');
1701		- break;
1702		- }
1703		- }
1704		- break;
1705		- }
1706		-
1707		- return $context_string;
1708		-}
1709		-
1710		-
1711		-//very good
1712		-private function add_email_to_loops($email) {
1713		- // Sanitize the email
1714		- $email = sanitize_email($email);
1715		-
1716		- // Retrieve and sanitize options
1717		- $api_key = isset($this->options['loops_api_key']) ? sanitize_text_field($this->options['loops_api_key']) : '';
1718		- $mailing_list_id = isset($this->options['loops_mailing_list']) ? sanitize_text_field($this->options['loops_mailing_list']) : '';
1719		-
1720		- // Check for missing API key or mailing list ID
1721		- if (empty($api_key) || empty($mailing_list_id)) {
1722		- //error_log(esc_html__('Loops API key or mailing list ID is missing.', 'mxchat'));
1723		- return;
1724		- }
1725		-
1726		- $data = array(
1727		- 'email' => $email,
1728		- 'subscribed' => true,
1729		- 'source' => __('MxChat AI Chatbot', 'mxchat'),
1730		- 'mailingLists' => array($mailing_list_id => true),
1731		- );
1732		-
1733		- $url = 'https://app.loops.so/api/v1/contacts/create';
1734		- $args = array(
1735		- 'body' => wp_json_encode($data),
1736		- 'headers' => array(
1737		- 'Authorization' => 'Bearer ' . $api_key,
1738		- 'Content-Type' => 'application/json',
1739		- ),
1740		- 'method' => 'POST',
1741		- 'timeout' => 45,
1742		- );
1743		-
1744		- $response = wp_remote_post($url, $args);
1745		-
1746		- // Handle errors in the API request
1747		- if (is_wp_error($response)) {
1748		- //error_log(esc_html__('Error adding email to Loops: ', 'mxchat') . $response->get_error_message());
1749		- return;
1750		- }
1751		-
1752		- // Check for non-200 HTTP responses
1753		- $response_code = wp_remote_retrieve_response_code($response);
1754		- if ($response_code != 200) {
1755		- $response_body = wp_remote_retrieve_body($response);
1756		- //error_log(esc_html__('Loops API responded with code ', 'mxchat') . $response_code . ': ' . $response_body);
1757		- }
1758		-}
1759		-
1760		-public function mxchat_handle_pdf_discussion($message, $user_id, $session_id) {
1761		- // Get the maximum number of pages allowed from admin settings
1762		- $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
1763		-
1764		- // Retrieve options for dynamic texts
1765		- $trigger_text = $this->options['pdf_intent_trigger_text'] ?? __("Please provide the URL to the PDF you'd like to discuss.", 'mxchat');
1766		- $success_text = $this->options['pdf_intent_success_text'] ?? __("I've processed the PDF. What questions do you have about it?", 'mxchat');
1767		- $error_text = $this->options['pdf_intent_error_text'] ?? __("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
1768		-
1769		- // Check for explicit request for new PDF
1770		- $new_pdf_requested = stripos($message, 'new') !== false ||
1771		- stripos($message, 'another') !== false ||
1772		- stripos($message, 'different') !== false;
1773		-
1774		- // If user mentions adding/reading a PDF, set waiting flag
1775		- if (stripos($message, 'pdf') !== false ||
1776		- stripos($message, 'document') !== false ||
1777		- stripos($message, 'read') !== false) {
1778		- set_transient('mxchat_waiting_for_pdf_url_' . $session_id, true, HOUR_IN_SECONDS);
1779		- $this->fallbackResponse['text'] = $trigger_text;
1780		- return;
1781		- }
1782		-
1783		- // If we're waiting for a URL or user requested new PDF
1784		- if ($new_pdf_requested || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
1785		- if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
1786		- // Process URL... (rest of your existing URL processing code)
1787		- } else {
1788		- $this->fallbackResponse['text'] = $trigger_text;
1789		- }
1790		- return;
1791		- }
1792		-
1793		- // Default to proceeding with conversation if no specific PDF action is needed
1794		- $this->fallbackResponse['text'] = '';
1795		-}
1796		-private function fetch_and_split_pdf_pages($pdf_source, $max_pages) {
1797		- $upload_dir = wp_upload_dir();
1798		- $temp_file = null;
1799		-
1800		- try {
1801		- // Handle URL vs local file
1802		- if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
1803		- // Validate and download the file from URL
1804		- $temp_file = wp_tempnam($pdf_source); // Safe temporary file name
1805		- $response = wp_remote_get($pdf_source, ['timeout' => 60]);
1806		-
1807		- if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
1808		- //error_log(esc_html__("Failed to download PDF. Error: ", 'mxchat') . print_r($response, true));
1809		- return false;
1810		- }
1811		-
1812		- file_put_contents($temp_file, wp_remote_retrieve_body($response));
1813		-
1814		- // Validate that the downloaded file is a PDF
1815		- $mime_type = mime_content_type($temp_file);
1816		- if ($mime_type !== 'application/pdf') {
1817		- //error_log(esc_html__("Invalid MIME type detected for PDF: ", 'mxchat') . $mime_type);
1818		- unlink($temp_file);
1819		- return false;
1820		- }
1821		- } else {
1822		- // For local files, use the provided path directly
1823		- $temp_file = $pdf_source;
1824		- }
1825		-
1826		- // Parse and process the PDF
1827		- $parser = new \Smalot\PdfParser\Parser();
1828		- $pdf = $parser->parseFile($temp_file);
1829		- $pages = $pdf->getPages();
1830		-
1831		- if (count($pages) > $max_pages) {
1832		- //error_log(esc_html__("PDF exceeds the maximum allowed pages: ", 'mxchat') . count($pages));
1833		- if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
1834		- unlink($temp_file);
1835		- }
1836		- return esc_html__('too_many_pages', 'mxchat');
1837		- }
1838		-
1839		- $embeddings = [];
1840		- foreach ($pages as $page_number => $page) {
1841		- $text = $page->getText();
1842		-
1843		- // Ensure text is non-empty before generating embeddings
1844		- if (empty(trim($text))) {
1845		- //error_log(esc_html__("Skipping empty page: ", 'mxchat') . ($page_number + 1));
1846		- continue;
1847		- }
1848		-
1849		- $embedding = $this->mxchat_generate_embedding(
1850		- esc_html__("Page ", 'mxchat') . ($page_number + 1) . ": " . $text,
1851		- $this->options['api_key']
1852		- );
1853		-
1854		- if ($embedding) {
1855		- $embeddings[] = [
1856		- 'page_number' => $page_number + 1,
1857		- 'embedding' => $embedding,
1858		- 'text' => $text,
1859		- ];
1860		- } else {
1861		- //error_log(esc_html__("Failed to generate embedding for page ", 'mxchat') . ($page_number + 1));
1862		- }
1863		- }
1864		-
1865		- // Clean up downloaded file if it was from URL
1866		- if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file) {
1867		- unlink($temp_file);
1868		- }
1869		-
1870		- return $embeddings;
1871		-
1872		- } catch (\Exception $e) {
1873		- // error_log(esc_html__("Error parsing or processing PDF: ", 'mxchat') . $e->getMessage());
1874		-
1875		- // Cleanup in case of exception
1876		- if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file && file_exists($temp_file)) {
1877		- unlink($temp_file);
1878		- }
1879		-
1880		- return false;
1881		- }
1882		-}
1883		-private function find_relevant_pdf_pages($query_embedding, $embeddings) {
1884		- //error_log(esc_html__("find_relevant_pdf_pages called.", 'mxchat'));
1885		-
1886		- $most_relevant = null;
1887		- $highest_similarity = -INF;
1888		-
1889		- foreach ($embeddings as $page_data) {
1890		- $similarity = $this->mxchat_calculate_cosine_similarity($query_embedding, $page_data['embedding']);
1891		-
1892		- if ($similarity > $highest_similarity) {
1893		- $highest_similarity = $similarity;
1894		- $most_relevant = $page_data['page_number'];
1895		- }
1896		- }
1897		-
1898		- if (!is_null($most_relevant)) {
1899		- $page_numbers = range(max(1, $most_relevant - 1), min(count($embeddings), $most_relevant + 1));
1900		- return array_filter($embeddings, function ($page) use ($page_numbers) {
1901		- return in_array($page['page_number'], $page_numbers);
1902		- });
1903		- }
1904		-
1905		- return [];
1906		-}
1907		-// Add this to your class
1908		-public function handle_pdf_upload() {
1909		- check_ajax_referer('mxchat_chat_nonce', 'nonce');
1910		-
1911		- if (!isset($_FILES['pdf_file']) || !isset($_POST['session_id'])) {
1912		- wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat'));
1913		- return;
1914		- }
1915		-
1916		- $file = $_FILES['pdf_file'];
1917		- $session_id = sanitize_text_field($_POST['session_id']);
1918		- $original_filename = sanitize_text_field($file['name']);
1919		-
1920		- $file_type = wp_check_filetype($file['name'], ['pdf' => 'application/pdf']);
1921		- if ($file_type['type'] !== 'application/pdf') {
1922		- wp_send_json_error(esc_html__('Invalid file type. Only PDF files are allowed.', 'mxchat'));
1923		- return;
1924		- }
1925		-
1926		- $upload_dir = wp_upload_dir();
1927		- $pdf_filename = 'mxchat_' . $session_id . '_' . time() . '.pdf';
1928		- $pdf_path = $upload_dir['path'] . '/' . $pdf_filename;
1929		-
1930		- if (!move_uploaded_file($file['tmp_name'], $pdf_path)) {
1931		- wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat'));
1932		- return;
1933		- }
1934		-
1935		- $this->clear_pdf_transients($session_id);
1936		-
1937		- $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
1938		- $embeddings = $this->fetch_and_split_pdf_pages($pdf_path, $max_pages);
1939		-
1940		- if ($embeddings === 'too_many_pages') {
1941		- unlink($pdf_path);
1942		- $error_message = sprintf(
1943		- $this->options['pdf_intent_error_text'] ??
1944		- esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
1945		- $max_pages
1946		- );
1947		- wp_send_json_error($error_message);
1948		- return;
1949		- }
1950		-
1951		- if ($embeddings === false || empty($embeddings)) {
1952		- unlink($pdf_path);
1953		- $error_message = $this->options['pdf_intent_error_text'] ??
1954		- esc_html__('The uploaded PDF appears to be empty or contains unsupported content.', 'mxchat');
1955		- wp_send_json_error($error_message);
1956		- return;
1957		- }
1958		-
1959		- if (!empty($embeddings)) {
1960		- set_transient('mxchat_pdf_url_' . $session_id, $pdf_path, HOUR_IN_SECONDS);
1961		- set_transient('mxchat_pdf_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS);
1962		- set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
1963		- set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
1964		-
1965		- $success_message = $this->options['pdf_intent_success_text'] ??
1966		- esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat');
1967		-
1968		- wp_send_json_success([
1969		- 'message' => $success_message,
1970		- 'filename' => $original_filename
1971		- ]);
1972		- return;
1973		- }
1974		-
1975		- unlink($pdf_path);
1976		- $error_message = $this->options['pdf_intent_error_text'] ??
1977		- esc_html__('Sorry, I couldn\'t process the PDF. Please ensure it\'s a valid file.', 'mxchat');
1978		- wp_send_json_error($error_message);
1979		- return;
1980		-}
1981		-public function handle_pdf_remove() {
1982		- check_ajax_referer('mxchat_chat_nonce', 'nonce');
1983		-
1984		- if (empty($_POST['session_id'])) {
1985		- wp_send_json_error(esc_html__('Session ID missing.', 'mxchat'));
1986		- wp_die();
1987		- }
1988		-
1989		- $session_id = sanitize_text_field($_POST['session_id']);
1990		- $pdf_path = get_transient('mxchat_pdf_url_' . $session_id);
1991		-
1992		- if ($pdf_path && file_exists($pdf_path)) {
1993		- unlink($pdf_path);
1994		- }
1995		-
1996		- $this->clear_pdf_transients($session_id);
1997		-
1998		- wp_send_json_success([
1999		- 'message' => esc_html__('PDF removed successfully.', 'mxchat')
2000		- ]);
2001		- wp_die();
2002		-}
2003		-
2004		-
2005		-
2006		-
2007		-function mxchat_fetch_new_messages() {
2008		- $session_id = sanitize_text_field($_POST['session_id']);
2009		- $last_seen_id = sanitize_text_field($_POST['last_seen_id']);
2010		- $persistence_enabled = $_POST['persistence_enabled'] === 'true';
2011		- $initial_timestamp = isset($_POST['initial_timestamp']) ? intval($_POST['initial_timestamp']) : 0;
2012		-
2013		- if (empty($session_id)) {
2014		- //error_log(esc_html__('Fetch new messages error: Session ID missing.', 'mxchat'));
2015		- wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
2016		- wp_die();
2017		- }
2018		-
2019		- $history = get_option("mxchat_history_{$session_id}", []);
2020		-
2021		- $new_messages = array_filter($history, function ($message) use ($last_seen_id, $persistence_enabled, $initial_timestamp) {
2022		- // If persistence is enabled, show all new messages
2023		- if ($persistence_enabled) {
2024		- return !empty($message['id']) &&
2025		- strcmp($message['id'], $last_seen_id) > 0 &&
2026		- $message['role'] === 'agent';
2027		- }
2028		-
2029		- // If persistence is disabled, only show messages after initial timestamp
2030		- return !empty($message['id']) &&
2031		- $message['role'] === 'agent' &&
2032		- $message['timestamp'] > $initial_timestamp;
2033		- });
2034		-
2035		- //error_log(esc_html__("New agent messages fetched for session $session_id. Last seen ID: $last_seen_id", 'mxchat'));
2036		-
2037		- wp_send_json_success([
2038		- 'new_messages' => array_values($new_messages)
2039		- ]);
2040		- wp_die();
2041		-}
2042		-
2043		-
2044		-public function mxchat_live_agent_handover($message, $user_id, $session_id) {
2045		- // First check if live agents are available
2046		- $live_agent_available = $this->options['live_agent_status'] ?? 'off';
2047		- if ($live_agent_available !== 'on') {
2048		- $away_message = $this->options['live_agent_away_message'] ?? 'Sorry, live agents are currently unavailable. I can continue helping you as an AI assistant.';
2049		- $this->fallbackResponse = [
2050		- 'text' => $away_message,
2051		- 'html' => '',
2052		- 'images' => [],
2053		- 'chat_mode' => 'ai'
2054		- ];
2055		- wp_send_json([
2056		- 'text' => $away_message,
2057		- 'html' => '',
2058		- 'chat_mode' => 'ai',
2059		- 'session_id' => $session_id
2060		- ]);
2061		- wp_die();
2062		- }
2063		-
2064		- $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
2065		- if (empty($slack_webhook_url)) {
2066		- return false;
2067		- }
2068		-
2069		- // Get recent chat history (last 5 messages)
2070		- $history = get_option("mxchat_history_{$session_id}", []);
2071		- $recent_history = array_slice($history, -5); // Get last 5 messages
2072		-
2073		- // Format conversation history
2074		- $conversation_context = "";
2075		- if (!empty($recent_history)) {
2076		- $conversation_context = "*Recent Conversation:*\n";
2077		- foreach ($recent_history as $hist_message) {
2078		- $role_display = $hist_message['role'] === 'user' ? 'User' : 'AI';
2079		- $conversation_context .= ">{$role_display}: {$hist_message['content']}\n";
2080		- }
2081		- $conversation_context .= "\n";
2082		- }
2083		-
2084		- update_option("mxchat_mode_{$session_id}", 'agent');
2085		-
2086		- $webhook_data = [
2087		- 'blocks' => [
2088		- [
2089		- 'type' => 'header',
2090		- 'text' => [
2091		- 'type' => 'plain_text',
2092		- 'text' => '🔔 New Live Agent Request',
2093		- 'emoji' => true
2094		- ]
2095		- ],
2096		- [
2097		- 'type' => 'section',
2098		- 'fields' => [
2099		- [
2100		- 'type' => 'mrkdwn',
2101		- 'text' => sprintf('*User ID:*\n`%s`', $user_id)
2102		- ],
2103		- [
2104		- 'type' => 'mrkdwn',
2105		- 'text' => sprintf('*Session ID:*\n`%s`', $session_id)
2106		- ]
2107		- ]
2108		- ]
2109		- ]
2110		- ];
2111		-
2112		- // Add conversation history if exists
2113		- if (!empty($conversation_context)) {
2114		- $webhook_data['blocks'][] = [
2115		- 'type' => 'section',
2116		- 'text' => [
2117		- 'type' => 'mrkdwn',
2118		- 'text' => $conversation_context
2119		- ]
2120		- ];
2121		- }
2122		-
2123		- // Add the current message
2124		- $webhook_data['blocks'][] = [
2125		- 'type' => 'section',
2126		- 'text' => [
2127		- 'type' => 'mrkdwn',
2128		- 'text' => sprintf('*Current Message:*\n%s', $message)
2129		- ]
2130		- ];
2131		-
2132		- // Add the reply button
2133		- $webhook_data['blocks'][] = [
2134		- 'type' => 'actions',
2135		- 'elements' => [
2136		- [
2137		- 'type' => 'button',
2138		- 'text' => [
2139		- 'type' => 'plain_text',
2140		- 'text' => '✍️ Reply',
2141		- 'emoji' => true
2142		- ],
2143		- 'value' => $session_id,
2144		- 'action_id' => 'reply_to_user',
2145		- 'style' => 'primary'
2146		- ]
2147		- ]
2148		- ];
2149		-
2150		- $response = wp_remote_post($slack_webhook_url, [
2151		- 'body' => json_encode($webhook_data),
2152		- 'headers' => [
2153		- 'Content-Type' => 'application/json',
2154		- ],
2155		- ]);
2156		-
2157		- if (is_wp_error($response)) {
2158		- return false;
2159		- }
2160		-
2161		- $success_message = $this->options['live_agent_notification_message'] ?? 'Live agent has been notified.';
2162		- $this->mxchat_save_chat_message($session_id, 'bot', $success_message);
2163		-
2164		- $this->fallbackResponse = [
2165		- 'text' => $success_message,
2166		- 'html' => '',
2167		- 'images' => [],
2168		- 'chat_mode' => 'agent'
2169		- ];
2170		-
2171		- wp_send_json([
2172		- 'success' => true,
2173		- 'text' => $success_message,
2174		- 'html' => '',
2175		- 'chat_mode' => 'agent',
2176		- 'session_id' => $session_id,
2177		- 'fallbackResponse' => $this->fallbackResponse
2178		- ]);
2179		- wp_die();
2180		-}
2181		-public function mxchat_send_user_message_to_agent($message, $user_id, $session_id) {
2182		- $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
2183		-
2184		- if (empty($slack_webhook_url)) {
2185		- //error_log(esc_html__('Slack Webhook URL is not configured.', 'mxchat'));
2186		- return false;
2187		- }
2188		-
2189		- $webhook_data = [
2190		- 'blocks' => [
2191		- [
2192		- 'type' => 'header',
2193		- 'text' => [
2194		- 'type' => 'plain_text',
2195		- 'text' => esc_html__('📩 New Chat Message', 'mxchat'),
2196		- 'emoji' => true
2197		- ]
2198		- ],
2199		- [
2200		- 'type' => 'section',
2201		- 'fields' => [
2202		- [
2203		- 'type' => 'mrkdwn',
2204		- 'text' => sprintf(esc_html__('*User ID:*\n`%s`', 'mxchat'), $user_id)
2205		- ],
2206		- [
2207		- 'type' => 'mrkdwn',
2208		- 'text' => sprintf(esc_html__('*Session ID:*\n`%s`', 'mxchat'), $session_id)
2209		- ]
2210		- ]
2211		- ],
2212		- [
2213		- 'type' => 'section',
2214		- 'text' => [
2215		- 'type' => 'mrkdwn',
2216		- 'text' => sprintf(esc_html__('*Message:*\n%s', 'mxchat'), $message)
2217		- ]
2218		- ],
2219		- [
2220		- 'type' => 'actions',
2221		- 'elements' => [
2222		- [
2223		- 'type' => 'button',
2224		- 'text' => [
2225		- 'type' => 'plain_text',
2226		- 'text' => esc_html__('✍️ Reply', 'mxchat'),
2227		- 'emoji' => true
2228		- ],
2229		- 'value' => $session_id,
2230		- 'action_id' => 'reply_to_user',
2231		- 'style' => 'primary'
2232		- ]
2233		- ]
2234		- ]
2235		- ]
2236		- ];
2237		-
2238		- $response = wp_remote_post($slack_webhook_url, [
2239		- 'body' => json_encode($webhook_data),
2240		- 'headers' => [
2241		- 'Content-Type' => 'application/json',
2242		- ],
2243		- ]);
2244		-
2245		- if (is_wp_error($response)) {
2246		- //error_log(esc_html__('Error sending message to Slack: ', 'mxchat') . $response->get_error_message());
2247		- return false;
2248		- }
2249		-
2250		- //error_log(esc_html__('Message sent to Slack successfully.', 'mxchat'));
2251		- return true;
2252		-}
2253		-public function handle_slack_interaction(WP_REST_Request $request) {
2254		- //error_log('Received Slack interaction');
2255		-
2256		- $payload = json_decode($request->get_param('payload'), true);
2257		- //error_log('Payload: ' . print_r($payload, true));
2258		-
2259		- // Handle button click
2260		- if ($payload['type'] === 'block_actions' && $payload['actions'][0]['action_id'] === 'reply_to_user') {
2261		- $session_id = $payload['actions'][0]['value'];
2262		- $trigger_id = $payload['trigger_id'];
2263		-
2264		- // Get Bot Token from settings
2265		- $slack_token = $this->options['live_agent_bot_token'] ?? '';
2266		-
2267		- if (empty($slack_token)) {
2268		- //error_log('Slack Bot Token not configured');
2269		- return new WP_REST_Response(['error' => esc_html__('Bot token not configured', 'mxchat')], 400);
2270		- }
2271		- $response = wp_remote_post('https://slack.com/api/views.open', [
2272		- 'headers' => [
2273		- 'Content-Type' => 'application/json',
2274		- 'Authorization' => 'Bearer ' . $slack_token
2275		- ],
2276		- 'body' => json_encode([
2277		- 'trigger_id' => $trigger_id,
2278		- 'view' => [
2279		- 'type' => 'modal',
2280		- 'callback_id' => 'reply_modal',
2281		- 'title' => [
2282		- 'type' => 'plain_text',
2283		- 'text' => __('Reply to User', 'mxchat')
2284		- ],
2285		- 'submit' => [
2286		- 'type' => 'plain_text',
2287		- 'text' => __('Send', 'mxchat')
2288		- ],
2289		- 'close' => [
2290		- 'type' => 'plain_text',
2291		- 'text' => __('Cancel', 'mxchat')
2292		- ],
2293		- 'blocks' => [
2294		- [
2295		- 'type' => 'input',
2296		- 'block_id' => 'reply_block',
2297		- 'label' => [
2298		- 'type' => 'plain_text',
2299		- 'text' => sprintf(__('Reply to session: %s', 'mxchat'), $session_id)
2300		- ],
2301		- 'element' => [
2302		- 'type' => 'plain_text_input',
2303		- 'action_id' => 'message',
2304		- 'multiline' => true,
2305		- 'placeholder' => [
2306		- 'type' => 'plain_text',
2307		- 'text' => __('Type your message here...', 'mxchat')
2308		- ]
2309		- ]
2310		- ]
2311		- ],
2312		- 'private_metadata' => $session_id
2313		- ]
2314		- ])
2315		- ]);
2316		-
2317		- //error_log('Views.open response: ' . print_r($response, true));
2318		-
2319		- // Return immediate acknowledgment
2320		- return new WP_REST_Response(['ok' => true]);
2321		- }
2322		-
2323		- // Handle modal submission
2324		-// Handle modal submission
2325		-if ($payload['type'] === 'view_submission') {
2326		- $session_id = $payload['view']['private_metadata'];
2327		- $message = $payload['view']['state']['values']['reply_block']['message']['value'];
2328		-
2329		- // Save the message (keep the message_id but don't include in response)
2330		- $this->mxchat_save_chat_message($session_id, 'agent', $message);
2331		-
2332		- // Keep the original response format for Slack
2333		- return new WP_REST_Response([
2334		- 'response_action' => 'clear'
2335		- ]);
2336		-}
2337		-
2338		- // Default acknowledgment
2339		- return new WP_REST_Response(['ok' => true]);
2340		-}
2341		-
2342		-public function mxchat_handle_agent_response(WP_REST_Request $request) {
2343		- //error_log('Received agent response request');
2344		- //error_log('Request data: ' . print_r($request->get_params(), true));
2345		- // error_log('Raw body: ' . file_get_contents('php://input'));
2346		-
2347		- // Get the data from Slack's slash command format
2348		- $command_text = $request->get_param('text');
2349		- // error_log('Command text: ' . $command_text);
2350		-
2351		- if (empty($command_text)) {
2352		- //error_log(esc_html__('Agent response error: No command text received', 'mxchat'));
2353		- return new WP_REST_Response([
2354		- 'error' => esc_html__('Command text is required. Format: /reply session_id message', 'mxchat')
2355		- ], 400);
2356		- }
2357		-
2358		- // Split the command text into session_id and message
2359		- $parts = explode(' ', $command_text, 2);
2360		- if (count($parts) !== 2) {
2361		- //error_log('Agent response error: Invalid command format');
2362		- return new WP_REST_Response([
2363		- 'error' => esc_html__('Invalid format. Use: /reply session_id message', 'mxchat')
2364		- ], 400);
2365		- }
2366		-
2367		- $session_id = sanitize_text_field($parts[0]);
2368		- $message = sanitize_text_field($parts[1]);
2369		-
2370		- //error_log("Processing agent response - Session ID: $session_id, Message: $message");
2371		-
2372		- // Save the message
2373		- $message_id = $this->mxchat_save_chat_message($session_id, 'agent', $message);
2374		-
2375		- if (!$message_id) {
2376		- // error_log('Failed to save agent message');
2377		- return new WP_REST_Response([
2378		- 'error' => esc_html__('Failed to save message', 'mxchat')
2379		- ], 500);
2380		- }
2381		-
2382		- // Return success response in Slack's expected format
2383		- return new WP_REST_Response([
2384		- 'response_type' => 'in_channel',
2385		- 'text' => esc_html__("Message sent successfully to session $session_id", 'mxchat')
2386		- ], 200);
2387		-}
2388		-
2389		-
2390		-public function mxchat_handle_switch_to_chatbot_intent($message, $user_id, $session_id) {
2391		- //error_log(esc_html__("Switching back to chatbot mode via intent.", 'mxchat'));
2392		-
2393		- // Just update mode to AI
2394		- update_option("mxchat_mode_{$session_id}", 'ai');
2395		-
2396		- // Initialize states
2397		- $this->fallbackResponse = ['text' => '', 'html' => '', 'images' => []];
2398		- $this->productCardHtml = '';
2399		-
2400		- // Set the response message
2401		- $this->fallbackResponse['text'] = esc_html__('You are now chatting with the AI chatbot.', 'mxchat');
2402		-
2403		- return true; // Intent was handled
2404		-}
2405		-
2406		-
2407		-
2408		-
2409		-// For the word upload handler
2410		-public function mxchat_handle_word_upload() {
2411		- // Delegate to word handler
2412		- $this->word_handler->mxchat_handle_word_upload();
2413		-}
2414		-
2415		-// For the word removal handler
2416		-public function mxchat_handle_word_remove() {
2417		- // Delegate to word handler
2418		- $this->word_handler->mxchat_handle_word_remove();
2419		-}
2420		-
2421		-// For the word status check
2422		-public function mxchat_check_word_status() {
2423		- // Delegate to word handler
2424		- $this->word_handler->mxchat_check_word_status();
2425		-}
2426		-
2427		-
2428		-private function mxchat_get_user_identifier() {
2429		- return MxChat_User::mxchat_get_user_identifier();
2430		-}
2431		-
2432		-private function mxchat_generate_embedding($text, $api_key) {
2433		- $endpoint = 'https://api.openai.com/v1/embeddings';
2434		-
2435		- $body = wp_json_encode([
2436		- 'input' => $text,
2437		- 'model' => 'text-embedding-ada-002'
2438		- ]);
2439		-
2440		- $args = [
2441		- 'body' => $body,
2442		- 'headers' => [
2443		- 'Content-Type' => 'application/json',
2444		- 'Authorization' => 'Bearer ' . $api_key,
2445		- ],
2446		- 'timeout' => 60,
2447		- 'redirection' => 5,
2448		- 'blocking' => true,
2449		- 'httpversion' => '1.0',
2450		- 'sslverify' => true,
2451		- ];
2452		-
2453		- $response = wp_remote_post($endpoint, $args);
2454		-
2455		- if (is_wp_error($response)) {
2456		- return null;
2457		- }
2458		-
2459		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
2460		-
2461		- if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) {
2462		- return $response_body['data'][0]['embedding'];
2463		- } else {
2464		- return null;
2465		- }
2466		- }
2467		-
2468		-
2469		-private function mxchat_find_relevant_content($user_embedding) {
2470		- //error_log('MXChat Vector Search: Starting content search...');
2471		-
2472		- // Retrieve the add-on settings from the database.
2473		- $addon_options = get_option('mxchat_pinecone_addon_options', array());
2474		-
2475		- // Determine whether Pinecone is enabled.
2476		- // We expect the sanitized setting to be a string '1' if enabled, otherwise '0'.
2477		- $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
2478		-
2479		- //error_log('Pinecone enabled flag: ' . $use_pinecone);
2480		-
2481		- if ($use_pinecone === 1) {
2482		- //error_log('MXChat Vector Search: Using Pinecone database');
2483		- return $this->find_relevant_content_pinecone($user_embedding);
2484		- } else {
2485		- //error_log('MXChat Vector Search: Using WordPress database');
2486		- return $this->find_relevant_content_wordpress($user_embedding);
2487		- }
2488		-}
2489		-
2490		-private function find_relevant_content_wordpress($user_embedding) {
2491		- global $wpdb;
2492		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
2493		- $cache_key = 'mxchat_system_prompt_embeddings';
2494		- $batch_size = 500;
2495		-
2496		- // Retrieve embeddings from cache or database
2497		- $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
2498		- if ($embeddings === false) {
2499		- $embeddings = [];
2500		- $offset = 0;
2501		-
2502		- // Load in batches and build cache
2503		- do {
2504		- $query = $wpdb->prepare(
2505		- "SELECT id, embedding_vector
2506		- FROM {$system_prompt_table}
2507		- LIMIT %d OFFSET %d",
2508		- $batch_size,
2509		- $offset
2510		- );
2511		-
2512		- $batch = $wpdb->get_results($query);
2513		- if (empty($batch)) {
2514		- break;
2515		- }
2516		-
2517		- $embeddings = array_merge($embeddings, $batch);
2518		- $offset += $batch_size;
2519		-
2520		- // Free memory
2521		- unset($batch);
2522		-
2523		- } while (true);
2524		-
2525		- if (empty($embeddings)) {
2526		- return ''; // Return an empty string if no embeddings found
2527		- }
2528		- wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
2529		- }
2530		-
2531		- // Initialize array to store relevant results with similarity scores
2532		- $relevant_results = [];
2533		- // Iterate through embeddings to calculate similarity
2534		- foreach ($embeddings as $embedding) {
2535		- $database_embedding = $embedding->embedding_vector
2536		- ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
2537		- : null;
2538		- if (is_array($database_embedding) && is_array($user_embedding)) {
2539		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
2540		- $relevant_results[] = [
2541		- 'id' => $embedding->id,
2542		- 'similarity' => $similarity
2543		- ];
2544		- }
2545		- // Free memory
2546		- unset($database_embedding);
2547		- }
2548		-
2549		- // Retrieve the similarity threshold
2550		- $similarity_threshold = ((int) get_option('mxchat_similarity_threshold', 80)) / 100;
2551		-
2552		- // Filter and sort relevant results by similarity
2553		- $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
2554		- return $result['similarity'] >= $similarity_threshold;
2555		- });
2556		- usort($relevant_results, function ($a, $b) {
2557		- return $b['similarity'] <=> $a['similarity'];
2558		- });
2559		-
2560		- // Limit to the top 5 results
2561		- $top_results = array_slice($relevant_results, 0, 5);
2562		-
2563		- // Initialize the final content
2564		- $content = '';
2565		-
2566		- // Fetch and combine content for the top results
2567		- foreach ($top_results as $result) {
2568		- $chunk_content = $this->fetch_content_with_product_links($result['id']);
2569		- // Check if the content is PDF-related and add surrounding pages
2570		- if (strpos($chunk_content, '{"document_type":"pdf"') !== false) {
2571		- $surrounding_content = $wpdb->get_results($wpdb->prepare(
2572		- "SELECT article_content FROM {$system_prompt_table}
2573		- WHERE id IN (
2574		- (SELECT id FROM {$system_prompt_table} WHERE id < %d ORDER BY id DESC LIMIT 1),
2575		- (SELECT id FROM {$system_prompt_table} WHERE id > %d ORDER BY id ASC LIMIT 1)
2576		- )",
2577		- $result['id'],
2578		- $result['id']
2579		- ));
2580		- // Add previous content if it exists
2581		- if (!empty($surrounding_content[0])) {
2582		- $content .= $surrounding_content[0]->article_content . "\n\n";
2583		- }
2584		- // Add the main chunk content
2585		- $content .= $chunk_content . "\n\n";
2586		- // Add next content if it exists
2587		- if (!empty($surrounding_content[1])) {
2588		- $content .= $surrounding_content[1]->article_content . "\n\n";
2589		- }
2590		- } else {
2591		- // For non-PDF content, add directly
2592		- $content .= $chunk_content . "\n\n";
2593		- }
2594		- }
2595		-
2596		- return trim($content);
2597		-}
2598		-/**
2599		- * Find relevant content in Pinecone vector database
2600		- */
2601		-private function find_relevant_content_pinecone($user_embedding) {
2602		- $options = get_option('mxchat_pinecone_addon_options', array());
2603		- $api_key = $options['mxchat_pinecone_api_key'] ?? '';
2604		- $host = $options['mxchat_pinecone_host'] ?? '';
2605		-
2606		- if (empty($host) || empty($api_key)) {
2607		- //error_log('Pinecone credentials not properly configured');
2608		- return '';
2609		- }
2610		-
2611		- // Get similarity threshold from WordPress settings
2612		- $similarity_threshold = ((int) get_option('mxchat_similarity_threshold', 80)) / 100;
2613		-
2614		- // Prepare the query request for Pinecone
2615		- $api_endpoint = "https://{$host}/query";
2616		-
2617		- $request_body = array(
2618		- 'vector' => $user_embedding,
2619		- 'topK' => 5,
2620		- 'includeMetadata' => true,
2621		- 'includeValues' => true
2622		- );
2623		-
2624		- $response = wp_remote_post($api_endpoint, array(
2625		- 'headers' => array(
2626		- 'Api-Key' => $api_key,
2627		- 'accept' => 'application/json',
2628		- 'content-type' => 'application/json'
2629		- ),
2630		- 'body' => wp_json_encode($request_body),
2631		- 'timeout' => 30
2632		- ));
2633		-
2634		- if (is_wp_error($response)) {
2635		- //error_log('Pinecone query error: ' . $response->get_error_message());
2636		- return '';
2637		- }
2638		-
2639		- $response_code = wp_remote_retrieve_response_code($response);
2640		- if ($response_code !== 200) {
2641		- //error_log('Pinecone API error: ' . wp_remote_retrieve_body($response));
2642		- return '';
2643		- }
2644		-
2645		- $results = json_decode(wp_remote_retrieve_body($response), true);
2646		- if (empty($results['matches'])) {
2647		- return '';
2648		- }
2649		-
2650		- // Initialize the final content
2651		- $content = '';
2652		-
2653		- // Process each match
2654		- foreach ($results['matches'] as $match) {
2655		- // Skip if similarity is below threshold
2656		- if ($match['score'] < $similarity_threshold) {
2657		- continue;
2658		- }
2659		-
2660		- if (!empty($match['metadata']['text']) && !empty($match['metadata']['source_url'])) {
2661		- // Add content with citation
2662		- $content .= $match['metadata']['text'] . "\n";
2663		- $content .= "Source: " . $match['metadata']['source_url'] . "\n\n";
2664		- }
2665		- }
2666		-
2667		- return trim($content);
2668		-}
2669		-
2670		-
2671		-private function mxchat_find_relevant_products($user_embedding) {
2672		- //error_log('MXChat Vector Search: Starting product search...');
2673		-
2674		- // Retrieve the add-on settings from the database
2675		- $addon_options = get_option('mxchat_pinecone_addon_options', array());
2676		-
2677		- // Determine whether Pinecone is enabled
2678		- $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
2679		-
2680		- //error_log('Pinecone enabled flag: ' . $use_pinecone);
2681		-
2682		- if ($use_pinecone === 1) {
2683		- //error_log('MXChat Vector Search: Using Pinecone database for products');
2684		- return $this->find_relevant_products_pinecone($user_embedding);
2685		- } else {
2686		- //error_log('MXChat Vector Search: Using WordPress database for products');
2687		- return $this->find_relevant_products_wordpress($user_embedding);
2688		- }
2689		-}
2690		-
2691		-private function find_relevant_products_wordpress($user_embedding) {
2692		- global $wpdb;
2693		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
2694		- $cache_key = 'mxchat_system_prompt_embeddings';
2695		- $batch_size = 500;
2696		-
2697		- // Original WordPress database search logic
2698		- // [Previous implementation remains the same]
2699		- $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
2700		- if ($embeddings === false) {
2701		- $embeddings = [];
2702		- $offset = 0;
2703		-
2704		- do {
2705		- $query = $wpdb->prepare(
2706		- "SELECT id, embedding_vector
2707		- FROM {$system_prompt_table}
2708		- LIMIT %d OFFSET %d",
2709		- $batch_size,
2710		- $offset
2711		- );
2712		-
2713		- $batch = $wpdb->get_results($query);
2714		- if (empty($batch)) {
2715		- break;
2716		- }
2717		-
2718		- $embeddings = array_merge($embeddings, $batch);
2719		- $offset += $batch_size;
2720		-
2721		- unset($batch);
2722		-
2723		- } while (true);
2724		-
2725		- if (empty($embeddings)) {
2726		- return '';
2727		- }
2728		- wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
2729		- }
2730		-
2731		- $relevant_results = [];
2732		- foreach ($embeddings as $embedding) {
2733		- $database_embedding = $embedding->embedding_vector
2734		- ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
2735		- : null;
2736		- if (is_array($database_embedding) && is_array($user_embedding)) {
2737		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
2738		- $relevant_results[] = [
2739		- 'id' => $embedding->id,
2740		- 'similarity' => $similarity
2741		- ];
2742		- }
2743		- unset($database_embedding);
2744		- }
2745		-
2746		- // Use fixed threshold for products
2747		- $similarity_threshold = 0.85;
2748		-
2749		- $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
2750		- return $result['similarity'] >= $similarity_threshold;
2751		- });
2752		- usort($relevant_results, function ($a, $b) {
2753		- return $b['similarity'] <=> $a['similarity'];
2754		- });
2755		-
2756		- $top_results = array_slice($relevant_results, 0, 5);
2757		- $content = '';
2758		-
2759		- foreach ($top_results as $result) {
2760		- $chunk_content = $this->fetch_content_with_product_links($result['id']);
2761		- $content .= $chunk_content . "\n\n";
2762		- }
2763		-
2764		- return trim($content);
2765		-}
2766		-
2767		-// Modified search function with correct filter syntax
2768		-private function find_relevant_products_pinecone($user_embedding) {
2769		- //error_log('Starting Pinecone product search...');
2770		-
2771		- $options = get_option('mxchat_pinecone_addon_options', array());
2772		- $api_key = $options['mxchat_pinecone_api_key'] ?? '';
2773		- $host = $options['mxchat_pinecone_host'] ?? '';
2774		-
2775		- if (empty($host) || empty($api_key)) {
2776		- //error_log('Pinecone credentials not properly configured for product search');
2777		- return '';
2778		- }
2779		-
2780		- $similarity_threshold = 0.85;
2781		- $api_endpoint = "https://{$host}/query";
2782		-
2783		- $request_body = array(
2784		- 'vector' => $user_embedding,
2785		- 'topK' => 5,
2786		- 'includeMetadata' => true,
2787		- 'includeValues' => true,
2788		- 'filter' => array(
2789		- 'type' => 'product'
2790		- )
2791		- );
2792		-
2793		- //error_log('Sending request to Pinecone with body: ' . wp_json_encode($request_body));
2794		-
2795		- $response = wp_remote_post($api_endpoint, array(
2796		- 'headers' => array(
2797		- 'Api-Key' => $api_key,
2798		- 'accept' => 'application/json',
2799		- 'content-type' => 'application/json'
2800		- ),
2801		- 'body' => wp_json_encode($request_body),
2802		- 'timeout' => 30
2803		- ));
2804		-
2805		- if (is_wp_error($response)) {
2806		- //error_log('Pinecone product query error: ' . $response->get_error_message());
2807		- return '';
2808		- }
2809		-
2810		- $response_code = wp_remote_retrieve_response_code($response);
2811		- //error_log('Pinecone response code: ' . $response_code);
2812		-
2813		- if ($response_code !== 200) {
2814		- //error_log('Pinecone API error during product search: ' . wp_remote_retrieve_body($response));
2815		- return '';
2816		- }
2817		-
2818		- $results = json_decode(wp_remote_retrieve_body($response), true);
2819		- //error_log('Pinecone raw response: ' . wp_remote_retrieve_body($response));
2820		-
2821		- if (empty($results['matches'])) {
2822		- //error_log('No matches found in Pinecone response');
2823		- return '';
2824		- }
2825		-
2826		- $content = '';
2827		- foreach ($results['matches'] as $match) {
2828		- if ($match['score'] < $similarity_threshold) {
2829		- //error_log("Match below threshold: " . $match['score']);
2830		- continue;
2831		- }
2832		-
2833		- if (!empty($match['metadata']['text'])) {
2834		- $content .= $match['metadata']['text'];
2835		- if (!empty($match['metadata']['source_url'])) {
2836		- $content .= "\n\nFor more details, check out this product: " . esc_url($match['metadata']['source_url']);
2837		- }
2838		- $content .= "\n\n";
2839		- }
2840		- }
2841		-
2842		- return trim($content);
2843		-}
2844		-
2845		-
2846		-private function fetch_content_with_product_links($most_relevant_id) {
2847		- global $wpdb;
2848		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
2849		-
2850		- // Fetch the article content and associated product URL
2851		- $query = $wpdb->prepare("SELECT article_content, source_url FROM {$system_prompt_table} WHERE id = %d", $most_relevant_id);
2852		- $result = $wpdb->get_row($query);
2853		-
2854		- if ($result) {
2855		- // Append the product link to the content if available
2856		- $content = $result->article_content;
2857		- if (!empty($result->source_url)) {
2858		- $content .= "\n\nFor more details, check out this product: " . esc_url($result->source_url);
2859		- }
2860		- return $content;
2861		- }
2862		-
2863		- return null;
2864		-}
2865		-
2866		-// Function definition
2867		-private function mxchat_generate_response($relevant_content, $api_key, $xai_api_key, $claude_api_key, $deepseek_api_key, $conversation_history) {
2868		- try {
2869		- if (!$relevant_content) {
2870		- return esc_html__("I'm sorry, I couldn't find relevant information on that topic.", 'mxchat');
2871		- }
2872		-
2873		- // Ensure conversation_history is an array
2874		- if (!is_array($conversation_history)) {
2875		- $conversation_history = array();
2876		- }
2877		-
2878		- // Get selected model with default fallback
2879		- $selected_model = isset($this->options['model']) ? $this->options['model'] : 'gpt-4o';
2880		-
2881		- // Extract model prefix to determine the provider
2882		- $model_parts = explode('-', $selected_model);
2883		- $provider = strtolower($model_parts[0]);
2884		-
2885		- // Handle model selection based on provider prefix
2886		- switch ($provider) {
2887		- case 'claude':
2888		- if (empty($claude_api_key)) {
2889		- throw new Exception(esc_html__('Claude API key is not configured', 'mxchat'));
2890		- }
2891		- return $this->mxchat_generate_response_claude(
2892		- $selected_model,
2893		- $claude_api_key,
2894		- $conversation_history,
2895		- $relevant_content
2896		- );
2897		-
2898		- case 'grok':
2899		- if (empty($xai_api_key)) {
2900		- throw new Exception(esc_html__('X.AI API key is not configured', 'mxchat'));
2901		- }
2902		- return $this->mxchat_generate_response_xai(
2903		- $selected_model,
2904		- $xai_api_key,
2905		- $conversation_history,
2906		- $relevant_content
2907		- );
2908		-
2909		- case 'deepseek':
2910		- if (empty($deepseek_api_key)) {
2911		- throw new Exception(esc_html__('DeepSeek API key is not configured', 'mxchat'));
2912		- }
2913		- return $this->mxchat_generate_response_deepseek(
2914		- $selected_model,
2915		- $deepseek_api_key,
2916		- $conversation_history,
2917		- $relevant_content
2918		- );
2919		-
2920		- case 'gpt':
2921		- if (empty($api_key)) {
2922		- throw new Exception(esc_html__('OpenAI API key is not configured', 'mxchat'));
2923		- }
2924		- return $this->mxchat_generate_response_openai(
2925		- $selected_model,
2926		- $api_key,
2927		- $conversation_history,
2928		- $relevant_content
2929		- );
2930		-
2931		- default:
2932		- // Default to OpenAI for custom models or unrecognized prefixes
2933		- if (empty($api_key)) {
2934		- throw new Exception(esc_html__('OpenAI API key is not configured', 'mxchat'));
2935		- }
2936		- return $this->mxchat_generate_response_openai(
2937		- $selected_model,
2938		- $api_key,
2939		- $conversation_history,
2940		- $relevant_content
2941		- );
2942		- }
2943		- } catch (Exception $e) {
2944		- //error_log('MXChat Error: ' . $e->getMessage());
2945		- return sprintf(
2946		- esc_html__('An error occurred: %s', 'mxchat'),
2947		- esc_html($e->getMessage())
2948		- );
2949		- }
2950		-}
2951		-
2952		-
2953		-private function mxchat_generate_response_deepseek($selected_model, $deepseek_api_key, $conversation_history, $relevant_content) {
2954		- // Ensure conversation_history is an array
2955		- if (!is_array($conversation_history)) {
2956		- $conversation_history = array();
2957		- }
2958		-
2959		- // Get system prompt instructions from options
2960		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
2961		-
2962		- // Create a new array for the formatted conversation
2963		- $formatted_conversation = array();
2964		-
2965		- // Add system message first
2966		- $formatted_conversation[] = array(
2967		- 'role' => 'system',
2968		- 'content' => $system_prompt_instructions . " " . $relevant_content
2969		- );
2970		-
2971		- // Add the rest of the conversation history
2972		- foreach ($conversation_history as $message) {
2973		- if (is_array($message) && isset($message['role']) && isset($message['content'])) {
2974		- $role = $message['role'];
2975		-
2976		- // Convert roles to supported format
2977		- if ($role === 'bot' || $role === 'agent') {
2978		- $role = 'assistant';
2979		- }
2980		- if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
2981		- $role = 'user';
2982		- }
2983		-
2984		- $formatted_conversation[] = array(
2985		- 'role' => $role,
2986		- 'content' => $message['content']
2987		- );
2988		- }
2989		- }
2990		-
2991		- $body = json_encode([
2992		- 'model' => $selected_model,
2993		- 'messages' => $formatted_conversation,
2994		- 'temperature' => 0.8,
2995		- 'stream' => false
2996		- ]);
2997		-
2998		- $args = [
2999		- 'body' => $body,
3000		- 'headers' => [
3001		- 'Content-Type' => 'application/json',
3002		- 'Authorization' => 'Bearer ' . $deepseek_api_key,
3003		- ],
3004		- 'timeout' => 60,
3005		- 'redirection' => 5,
3006		- 'blocking' => true,
3007		- 'httpversion' => '1.0',
3008		- 'sslverify' => true,
3009		- ];
3010		-
3011		- $response = wp_remote_post('https://api.deepseek.com/v1/chat/completions', $args);
3012		-
3013		- if (is_wp_error($response)) {
3014		- //error_log('DeepSeek API Error: ' . $response->get_error_message());
3015		- return "Sorry, there was an error processing your request.";
3016		- }
3017		-
3018		- $response_body = wp_remote_retrieve_body($response);
3019		- $decoded_response = json_decode($response_body, true);
3020		-
3021		- if (isset($decoded_response['choices'][0]['message']['content'])) {
3022		- return trim($decoded_response['choices'][0]['message']['content']);
3023		- } else {
3024		- //error_log('DeepSeek API Response Format Error: ' . print_r($decoded_response, true));
3025		- return "Sorry, I couldn't process that request.";
3026		- }
3027		-}
3028		-
3029		-private function mxchat_generate_response_openai($selected_model, $api_key, $conversation_history, $relevant_content) {
3030		- // Ensure conversation_history is an array
3031		- if (!is_array($conversation_history)) {
3032		- $conversation_history = array();
3033		- }
3034		-
3035		- // Get system prompt instructions from options
3036		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3037		-
3038		- // Create a new array for the formatted conversation
3039		- $formatted_conversation = array();
3040		-
3041		- // Add system message first
3042		- $formatted_conversation[] = array(
3043		- 'role' => 'system',
3044		- 'content' => $system_prompt_instructions . " " . $relevant_content
3045		- );
3046		-
3047		- // Add the rest of the conversation history
3048		- foreach ($conversation_history as $message) {
3049		- if (is_array($message) && isset($message['role']) && isset($message['content'])) {
3050		- $role = $message['role'];
3051		-
3052		- // Convert roles to supported format
3053		- if ($role === 'bot' || $role === 'agent') {
3054		- $role = 'assistant';
3055		- }
3056		- if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
3057		- $role = 'user';
3058		- }
3059		-
3060		- $formatted_conversation[] = array(
3061		- 'role' => $role,
3062		- 'content' => $message['content']
3063		- );
3064		- }
3065		- }
3066		-
3067		- $body = json_encode([
3068		- 'model' => $selected_model,
3069		- 'messages' => $formatted_conversation,
3070		- 'temperature' => 0.8,
3071		- 'stream' => false
3072		- ]);
3073		-
3074		- $args = [
3075		- 'body' => $body,
3076		- 'headers' => [
3077		- 'Content-Type' => 'application/json',
3078		- 'Authorization' => 'Bearer ' . $api_key,
3079		- ],
3080		- 'timeout' => 60,
3081		- 'redirection' => 5,
3082		- 'blocking' => true,
3083		- 'httpversion' => '1.0',
3084		- 'sslverify' => true,
3085		- ];
3086		-
3087		- $response = wp_remote_post('https://api.openai.com/v1/chat/completions', $args);
3088		-
3089		- if (is_wp_error($response)) {
3090		- //error_log('OpenAI API Error: ' . $response->get_error_message());
3091		- return "Sorry, there was an error processing your request.";
3092		- }
3093		-
3094		- $response_body = wp_remote_retrieve_body($response);
3095		- $decoded_response = json_decode($response_body, true);
3096		-
3097		- if (isset($decoded_response['choices'][0]['message']['content'])) {
3098		- return trim($decoded_response['choices'][0]['message']['content']);
3099		- } else {
3100		- //error_log('OpenAI API Response Format Error: ' . print_r($decoded_response, true));
3101		- return "Sorry, I couldn't process that request.";
3102		- }
3103		-}
3104		-private function mxchat_generate_response_xai($selected_model, $xai_api_key, $conversation_history, $relevant_content) {
3105		- // Get system prompt instructions from options
3106		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3107		-
3108		- // Add system prompt to relevant content
3109		- $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
3110		-
3111		- // Prepend system instructions to the conversation history
3112		- array_unshift($conversation_history, [
3113		- 'role' => 'system',
3114		- 'content' => "Here are your instructions: " . $content_with_instructions
3115		- ]);
3116		-
3117		- // Ensure consistency: Replace 'bot' and 'agent' roles with supported values
3118		- foreach ($conversation_history as &$message) {
3119		- if ($message['role'] === 'bot') {
3120		- $message['role'] = 'assistant';
3121		- } elseif ($message['role'] === 'agent') {
3122		- // Tag the message as coming from a live agent
3123		- $message['role'] = 'assistant';
3124		- if (!isset($message['metadata'])) {
3125		- $message['metadata'] = ['source' => 'live_agent'];
3126		- }
3127		- }
3128		-
3129		- // Ensure all roles are valid
3130		- if (!in_array($message['role'], ['system', 'assistant', 'user', 'function', 'tool'])) {
3131		- $message['role'] = 'user'; // Default to 'user'
3132		- }
3133		- }
3134		-
3135		-
3136		- // Build the request body
3137		- $body = json_encode([
3138		- 'model' => $selected_model,
3139		- 'messages' => $conversation_history,
3140		- 'temperature' => 0.8,
3141		- 'stream' => false
3142		- ]);
3143		-
3144		- // Set up the API request
3145		- $args = [
3146		- 'body' => $body,
3147		- 'headers' => [
3148		- 'Content-Type' => 'application/json',
3149		- 'Authorization' => 'Bearer ' . $xai_api_key,
3150		- ],
3151		- 'timeout' => 60,
3152		- 'redirection' => 5,
3153		- 'blocking' => true,
3154		- 'httpversion' => '1.0',
3155		- 'sslverify' => true,
3156		- ];
3157		-
3158		- // Make the API request
3159		- $response = wp_remote_post('https://api.x.ai/v1/chat/completions', $args);
3160		-
3161		- // Process the response
3162		- if (is_wp_error($response)) {
3163		- return "Sorry, there was an error processing your request.";
3164		- }
3165		-
3166		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
3167		-
3168		- if (isset($response_body['choices'][0]['message']['content'])) {
3169		- return trim($response_body['choices'][0]['message']['content']);
3170		- } else {
3171		- return "Sorry, I couldn't process that request.";
3172		- }
3173		-}
3174		-
3175		-private function mxchat_generate_response_claude($selected_model, $claude_api_key, $conversation_history, $relevant_content) {
3176		- // Get system prompt instructions from options
3177		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3178		-
3179		- // Clean and validate conversation history
3180		- foreach ($conversation_history as &$message) {
3181		- // Convert bot and agent roles to assistant
3182		- if ($message['role'] === 'bot' || $message['role'] === 'agent') {
3183		- $message['role'] = 'assistant';
3184		- }
3185		-
3186		- // Remove unsupported roles - Claude only supports 'assistant' and 'user'
3187		- if (!in_array($message['role'], ['assistant', 'user'])) {
3188		- $message['role'] = 'user';
3189		- }
3190		-
3191		- // Ensure content field exists
3192		- if (!isset($message['content']) || empty($message['content'])) {
3193		- $message['content'] = '';
3194		- }
3195		-
3196		- // Remove any unsupported fields
3197		- $message = array_intersect_key($message, array_flip(['role', 'content']));
3198		- }
3199		-
3200		- // Add relevant content as the latest user message
3201		- $conversation_history[] = [
3202		- 'role' => 'user',
3203		- 'content' => $relevant_content
3204		- ];
3205		-
3206		- // Build request body
3207		- $body = json_encode([
3208		- 'model' => $selected_model,
3209		- 'max_tokens' => 1000,
3210		- 'temperature' => 0.8,
3211		- 'messages' => $conversation_history,
3212		- 'system' => $system_prompt_instructions
3213		- ]);
3214		-
3215		- // Set up API request
3216		- $args = [
3217		- 'body' => $body,
3218		- 'headers' => [
3219		- 'Content-Type' => 'application/json',
3220		- 'x-api-key' => $claude_api_key,
3221		- 'anthropic-version' => '2023-06-01'
3222		- ],
3223		- 'timeout' => 60,
3224		- 'redirection' => 5,
3225		- 'blocking' => true,
3226		- 'httpversion' => '1.0',
3227		- 'sslverify' => true,
3228		- ];
3229		-
3230		- // Make API request
3231		- $response = wp_remote_post('https://api.anthropic.com/v1/messages', $args);
3232		-
3233		- // Check for WordPress errors
3234		- if (is_wp_error($response)) {
3235		- //error_log("Claude API request error: " . $response->get_error_message());
3236		- return "Sorry, there was an error connecting to the API.";
3237		- }
3238		-
3239		- // Check HTTP response code
3240		- $http_code = wp_remote_retrieve_response_code($response);
3241		- if ($http_code !== 200) {
3242		- $error_body = wp_remote_retrieve_body($response);
3243		- //error_log("Claude API HTTP error: " . $http_code . " - " . $error_body);
3244		-
3245		- // Try to extract error message from response
3246		- $error_data = json_decode($error_body, true);
3247		- $error_message = isset($error_data['error']['message']) ?
3248		- $error_data['error']['message'] :
3249		- "HTTP error " . $http_code;
3250		-
3251		- return "Sorry, the API returned an error: " . $error_message;
3252		- }
3253		-
3254		- // Parse response
3255		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
3256		-
3257		- // Check for JSON decode errors
3258		- if (json_last_error() !== JSON_ERROR_NONE) {
3259		- //error_log("Claude API JSON decode error: " . json_last_error_msg());
3260		- return "Sorry, there was an error processing the API response.";
3261		- }
3262		-
3263		- // Extract and validate response content
3264		- if (isset($response_body['content']) &&
3265		- is_array($response_body['content']) &&
3266		- !empty($response_body['content']) &&
3267		- isset($response_body['content'][0]['text'])) {
3268		- return trim($response_body['content'][0]['text']);
3269		- }
3270		-
3271		- // Log unexpected response format
3272		- //error_log("Claude API unexpected response format: " . print_r($response_body, true));
3273		- return "Sorry, I received an unexpected response format from the API.";
3274		-}
3275		-public function mxchat_dismiss_pre_chat_message() {
3276		- // Get and sanitize the user identifier
3277		- $user_id = $this->mxchat_get_user_identifier();
3278		- $user_id = sanitize_key($user_id);
3279		-
3280		- // Set a transient to track that the user has dismissed the pre-chat message
3281		- $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
3282		- set_transient($transient_key, true, DAY_IN_SECONDS);
3283		-
3284		- wp_send_json_success();
3285		-}
3286		-
3287		-public function mxchat_check_pre_chat_message_status() {
3288		- // Get and sanitize the user identifier
3289		- $user_id = $this->mxchat_get_user_identifier();
3290		- $user_id = sanitize_key($user_id);
3291		-
3292		- // Check if the transient exists (i.e., if the message was dismissed)
3293		- $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
3294		- $dismissed = get_transient($transient_key);
3295		-
3296		- // Log the result to see if it's being set correctly
3297		- //error_log("Check pre-chat message dismissed for $user_id: " . ($dismissed ? 'Yes' : 'No'));
3298		-
3299		- if ($dismissed) {
3300		- wp_send_json_success(['dismissed' => true]);
3301		- } else {
3302		- wp_send_json_success(['dismissed' => false]);
3303		- }
3304		-
3305		- wp_die();
3306		-}
3307		-
3308		-private function mxchat_calculate_cosine_similarity($vectorA, $vectorB) {
3309		- if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) {
3310		- return 0;
3311		- }
3312		-
3313		- $dotProduct = array_sum(array_map(function ($a, $b) {
3314		- return $a * $b;
3315		- }, $vectorA, $vectorB));
3316		- $normA = sqrt(array_sum(array_map(function ($a) {
3317		- return $a * $a;
3318		- }, $vectorA)));
3319		- $normB = sqrt(array_sum(array_map(function ($b) {
3320		- return $b * $b;
3321		- }, $vectorB)));
3322		-
3323		- if ($normA == 0 || $normB == 0) {
3324		- return 0;
3325		- }
3326		-
3327		- return $dotProduct / ($normA * $normB);
3328		- }
3329		-
3330		-public function mxchat_enqueue_scripts_styles() {
3331		- // Define version numbers for the styles and scripts
3332		- $chat_style_version = '2.0.4'; // Replace with your actual version
3333		- $chat_script_version = '2.0.4'; // Replace with your actual version
3334		-
3335		- // Enqueue the script
3336		- wp_enqueue_script(
3337		- 'mxchat-chat-js',
3338		- plugin_dir_url(__FILE__) . '../js/chat-script.js',
3339		- array('jquery'),
3340		- $chat_script_version,
3341		- true
3342		- );
3343		-
3344		- // Enqueue the CSS
3345		- wp_enqueue_style(
3346		- 'mxchat-chat-css',
3347		- plugin_dir_url(__FILE__) . '../css/chat-style.css',
3348		- array(),
3349		- $chat_style_version
3350		- );
3351		-
3352		- // Fetch options from the database
3353		- $this->options = get_option('mxchat_options');
3354		- $prompts_options = get_option('mxchat_prompts_options', array());
3355		-
3356		- // Prepare settings for JavaScript
3357		- $style_settings = array(
3358		- 'ajax_url' => admin_url('admin-ajax.php'),
3359		- 'nonce' => wp_create_nonce('mxchat_chat_nonce'),
3360		- 'link_target_toggle' => $this->options['link_target_toggle'] ?? 'off',
3361		- 'rate_limit_message' => $this->options['rate_limit_message'] ?? 'Rate limit exceeded. Please try again later.',
3362		- 'complianz_toggle' => isset($this->options['complianz_toggle']) && $this->options['complianz_toggle'] === 'on',
3363		- 'user_message_bg_color' => $this->options['user_message_bg_color'] ?? '#fff',
3364		- 'user_message_font_color' => $this->options['user_message_font_color'] ?? '#212121',
3365		- 'bot_message_bg_color' => $this->options['bot_message_bg_color'] ?? '#212121',
3366		- 'bot_message_font_color' => $this->options['bot_message_font_color'] ?? '#fff',
3367		- 'top_bar_bg_color' => $this->options['top_bar_bg_color'] ?? '#212121',
3368		- 'send_button_font_color' => $this->options['send_button_font_color'] ?? '#212121',
3369		- 'close_button_color' => $this->options['close_button_color'] ?? '#fff',
3370		- 'chatbot_background_color' => $this->options['chatbot_background_color'] ?? '#212121',
3371		- 'chatbot_bg_color' => $this->options['chatbot_bg_color'] ?? '#fff',
3372		- 'icon_color' => $this->options['icon_color'] ?? '#fff',
3373		- 'chat_input_font_color' => $this->options['chat_input_font_color'] ?? '#212121',
3374		- 'chat_persistence_toggle' => $this->options['chat_persistence_toggle'] ?? 'off',
3375		- 'appendWidgetToBody' => $this->options['append_to_body'] ?? 'off', // Example for consistency
3376		-
3377		- 'live_agent_message_bg_color' => $this->options['live_agent_message_bg_color'] ?? '#ffffff',
3378		- 'live_agent_message_font_color' => $this->options['live_agent_message_font_color'] ?? '#333333',
3379		- 'chat_toolbar_toggle' => $this->options['chat_toolbar_toggle'] ?? 'off',
3380		- 'mode_indicator_bg_color' => $this->options['mode_indicator_bg_color'] ?? '#767676',
3381		- 'mode_indicator_font_color' => $this->options['mode_indicator_font_color'] ?? '#ffffff',
3382		- 'toolbar_icon_color' => $this->options['toolbar_icon_color'] ?? '#212121',
3383		-
3384		- 'use_pinecone' => $prompts_options['mxchat_use_pinecone'] ?? '0',
3385		- 'pinecone_enabled' => isset($prompts_options['mxchat_use_pinecone']) && $prompts_options['mxchat_use_pinecone'] === '1'
3386		- );
3387		-
3388		- // Pass the settings to the script
3389		- wp_localize_script('mxchat-chat-js', 'mxchatChat', $style_settings);
3390		-}
3391		-
3392		-
3393		-public function mxchat_reset_rate_limits() {
3394		- global $wpdb;
3395		-
3396		- // Define a cache key pattern for rate limits
3397		- $cache_key_pattern = 'mxchat_chat_limit_%';
3398		-
3399		- // Retrieve all option names matching the pattern
3400		- // phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.DirectDatabaseQuery.DirectQuery
3401		- $option_names = $wpdb->get_col("SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
3402		-
3403		- // db call ok; no-cache ok
3404		- // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery -- db call ok
3405		- $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
3406		-
3407		- // Clear the relevant cache entries
3408		- foreach ($option_names as $option_name) {
3409		- wp_cache_delete($option_name, 'options');
3410		- }
3411		-
3412		- // Optionally, clear a general cache if you have one
3413		- wp_cache_delete('mxchat_all_chat_limits', 'options');
3414		- }
3415		-
3416		-private function mxchat_fetch_woocommerce_products() {
3417		- // Ensure WooCommerce is active
3418		- if (!class_exists('WooCommerce')) {
3419		- return [];
3420		- }
3421		-
3422		- $args = array(
3423		- 'post_type' => 'product',
3424		- 'post_status' => 'publish',
3425		- 'posts_per_page' => -1,
3426		- );
3427		-
3428		- $products = get_posts($args);
3429		- $product_data = [];
3430		-
3431		- foreach ($products as $product) {
3432		- $product_id = $product->ID;
3433		- $product_obj = wc_get_product($product_id);
3434		-
3435		- $product_data[] = array(
3436		- 'id' => $product_id,
3437		- 'name' => $product_obj->get_name(),
3438		- 'description' => $product_obj->get_description(),
3439		- 'short_description' => $product_obj->get_short_description(),
3440		- 'url' => get_permalink($product_id),
3441		- 'price' => $product_obj->get_regular_price(),
3442		- 'sale_price' => $product_obj->get_sale_price(),
3443		- 'stock_status' => $product_obj->get_stock_status(),
3444		- 'sku' => $product_obj->get_sku(),
3445		- 'in_stock' => $product_obj->is_in_stock(),
3446		- 'total_sales' => $product_obj->get_total_sales(),
3447		- );
3448		- }
3449		-
3450		- return $product_data;
3451		-}
3452		-
3453		-}
3454		-?>
	1	+<?php
	2	+if (!defined('ABSPATH')) {
	3	+ exit;
	4	+}
	5	+
	6	+class MxChat_Integrator {
	7	+ private $options;
	8	+ private $prompts_options;
	9	+ private $chat_count;
	10	+ private $fallbackResponse;
	11	+ private $productCardHtml;
	12	+ private $word_handler;
	13	+ private $last_similarity_analysis = null;
	14	+ private $current_valid_urls = [];
	15	+ private $is_streaming = false; // ADDED: Track if current request is streaming
	16	+
	17	+/**
	18	+ * Class constructor
	19	+ */
	20	+public function __construct() {
	21	+ $this->options = get_option('mxchat_options');
	22	+ $this->prompts_options = get_option('mxchat_prompts_options', array());
	23	+ $this->chat_count = get_option('mxchat_chat_count', 0);
	24	+ $this->word_handler = new MXChat_Word_Handler($this->options);
	25	+
	26	+ // Add all action hooks
	27	+ add_action('wp_enqueue_scripts', array($this, 'mxchat_enqueue_scripts_styles'));
	28	+ add_action('wp_ajax_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request'));
	29	+ add_action('wp_ajax_nopriv_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request'));
	30	+ add_action('wp_ajax_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message'));
	31	+ add_action('wp_ajax_nopriv_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message'));
	32	+
	33	+ // Add the AJAX actions for checking if the pre-chat message was dismissed
	34	+ add_action('wp_ajax_mxchat_check_pre_chat_message_status', array($this, 'mxchat_check_pre_chat_message_status'));
	35	+ add_action('wp_ajax_nopriv_mxchat_check_pre_chat_message_status', array($this, 'mxchat_check_pre_chat_message_status'));
	36	+ add_action('wp_ajax_mxchat_fetch_conversation_history', [$this, 'mxchat_fetch_conversation_history']);
	37	+ add_action('wp_ajax_nopriv_mxchat_fetch_conversation_history', [$this, 'mxchat_fetch_conversation_history']);
	38	+ add_action('wp_ajax_mxchat_add_to_cart', [$this, 'mxchat_add_to_cart']);
	39	+ add_action('wp_ajax_nopriv_mxchat_add_to_cart', [$this, 'mxchat_add_to_cart']);
	40	+
	41	+ // Add REST API routes registration
	42	+ add_action('rest_api_init', array($this, 'register_routes'));
	43	+ add_action('wp_ajax_mxchat_fetch_new_messages', array($this, 'mxchat_fetch_new_messages'));
	44	+ add_action('wp_ajax_nopriv_mxchat_fetch_new_messages', array($this, 'mxchat_fetch_new_messages'));
	45	+
	46	+ // Rate limit action - notice we removed the old schedule setup
	47	+ add_action('mxchat_reset_rate_limits', array($this, 'mxchat_reset_rate_limits'));
	48	+
	49	+ // File upload and handling actions
	50	+ add_action('wp_ajax_mxchat_upload_pdf', [$this, 'handle_pdf_upload']);
	51	+ add_action('wp_ajax_nopriv_mxchat_upload_pdf', [$this, 'handle_pdf_upload']);
	52	+ add_action('wp_ajax_mxchat_remove_pdf', [$this, 'handle_pdf_remove']);
	53	+ add_action('wp_ajax_nopriv_mxchat_remove_pdf', [$this, 'handle_pdf_remove']);
	54	+
	55	+ // Word document handling actions
	56	+ add_action('wp_ajax_mxchat_upload_word', array($this, 'mxchat_handle_word_upload'));
	57	+ add_action('wp_ajax_nopriv_mxchat_upload_word', array($this, 'mxchat_handle_word_upload'));
	58	+ add_action('wp_ajax_mxchat_remove_word', array($this, 'mxchat_handle_word_remove'));
	59	+ add_action('wp_ajax_nopriv_mxchat_remove_word', array($this, 'mxchat_handle_word_remove'));
	60	+ add_action('wp_ajax_mxchat_check_word_status', array($this, 'mxchat_check_word_status'));
	61	+ add_action('wp_ajax_nopriv_mxchat_check_word_status', array($this, 'mxchat_check_word_status'));
	62	+
	63	+ // Email handling actions
	64	+ add_action('wp_ajax_nopriv_mxchat_handle_save_email_and_response', [$this, 'mxchat_handle_save_email_and_response']);
	65	+ add_action('wp_ajax_mxchat_handle_save_email_and_response', [$this, 'mxchat_handle_save_email_and_response']);
	66	+ add_action('wp_ajax_nopriv_mxchat_check_email_provided', [$this, 'mxchat_check_email_provided']);
	67	+ add_action('wp_ajax_mxchat_check_email_provided', [$this, 'mxchat_check_email_provided']);
	68	+
	69	+ add_action('wp_ajax_mxchat_stream_chat', array($this, 'mxchat_handle_chat_request'));
	70	+ add_action('wp_ajax_nopriv_mxchat_stream_chat', array($this, 'mxchat_handle_chat_request'));
	71	+
	72	+ // Testing panel AJAX actions
	73	+ add_action('wp_ajax_mxchat_get_system_info', array($this, 'mxchat_get_system_info'));
	74	+ add_action('wp_ajax_mxchat_get_similarity_threshold', array($this, 'mxchat_get_similarity_threshold'));
	75	+ add_action('wp_ajax_mxchat_get_kb_status', array($this, 'mxchat_get_kb_status'));
	76	+ add_action('wp_ajax_mxchat_start_fresh_session', array($this, 'mxchat_start_fresh_session'));
	77	+ // Add to your existing constructor, in the section with other AJAX actions:
	78	+ add_action('wp_ajax_mxchat_track_url_click', array($this, 'mxchat_track_url_click'));
	79	+ add_action('wp_ajax_nopriv_mxchat_track_url_click', array($this, 'mxchat_track_url_click'));
	80	+ add_action('wp_ajax_mxchat_track_originating_page', array($this, 'mxchat_track_originating_page'));
	81	+ add_action('wp_ajax_nopriv_mxchat_track_originating_page', array($this, 'mxchat_track_originating_page'));
	82	+ // Add chat mode checking actions
	83	+ add_action('wp_ajax_mxchat_get_current_chat_mode', array($this, 'mxchat_get_current_chat_mode'));
	84	+ add_action('wp_ajax_nopriv_mxchat_get_current_chat_mode', array($this, 'mxchat_get_current_chat_mode'));
	85	+
	86	+ add_filter('mxchat_check_actions_only', array($this, 'check_actions_for_addons'), 10, 4);
	87	+
	88	+
	89	+}
	90	+
	91	+// In your core plugin's check_actions_for_addons method:
	92	+public function check_actions_for_addons($default, $message, $user_id, $session_id) {
	93	+ //error_log('MxChat Core: check_actions_for_addons called with message: ' . $message);
	94	+
	95	+ $result = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
	96	+
	97	+ //error_log('MxChat Core: Intent check result = ' . ($result === false ? 'false' : 'true'));
	98	+
	99	+ return $result;
	100	+}
	101	+
	102	+ private function mxchat_increment_chat_count() {
	103	+ $chat_count = get_option('mxchat_chat_count', 0);
	104	+ $chat_count++;
	105	+ update_option('mxchat_chat_count', $chat_count);
	106	+ }
	107	+
	108	+function mxchat_fetch_conversation_history() {
	109	+ if (empty($_POST['session_id'])) {
	110	+ wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
	111	+ wp_die();
	112	+ }
	113	+
	114	+ $session_id = sanitize_text_field($_POST['session_id']);
	115	+
	116	+ // SECURITY FIX: Verify session ownership before retrieving data
	117	+ $current_user_identifier = MxChat_User::mxchat_get_user_identifier();
	118	+
	119	+ // Check if this session has an owner recorded
	120	+ $session_owner = get_option("mxchat_session_owner_{$session_id}");
	121	+
	122	+ // If session has an owner and it doesn't match current user, deny access
	123	+ if ($session_owner && $session_owner !== $current_user_identifier) {
	124	+ wp_send_json_error(['message' => esc_html__('Unauthorized access.', 'mxchat')]);
	125	+ wp_die();
	126	+ }
	127	+
	128	+ // If no owner is set yet, claim ownership (for legacy sessions)
	129	+ if (!$session_owner) {
	130	+ update_option("mxchat_session_owner_{$session_id}", $current_user_identifier, 'no');
	131	+ }
	132	+
	133	+ $history = get_option("mxchat_history_{$session_id}", []); // Retrieve stored history
	134	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai'); // Get current chat mode
	135	+
	136	+ if (empty($history)) {
	137	+ // Even if history is empty, return the chat mode
	138	+ wp_send_json_success([
	139	+ 'conversation' => [],
	140	+ 'chat_mode' => $chat_mode
	141	+ ]);
	142	+ wp_die();
	143	+ }
	144	+
	145	+ wp_send_json_success([
	146	+ 'conversation' => $history,
	147	+ 'chat_mode' => $chat_mode
	148	+ ]);
	149	+ wp_die();
	150	+}
	151	+private function mxchat_fetch_conversation_history_for_ai($session_id) {
	152	+ $history = get_option("mxchat_history_{$session_id}", []);
	153	+ $formatted_history = [];
	154	+
	155	+ // Adjusted for code-heavy conversations
	156	+ $max_tokens = 120000; // Context window size
	157	+ $reserved_tokens = 5000; // Space for system prompts + current query
	158	+ $current_token_count = 0;
	159	+
	160	+ // Allowed HTML tags for content sanitization
	161	+ $allowed_tags = [
	162	+ 'pre' => ['class' => true],
	163	+ 'code' => ['class' => true],
	164	+ 'span' => ['class' => true],
	165	+ 'div' => ['class' => true],
	166	+ 'strong' => [],
	167	+ 'em' => []
	168	+ ];
	169	+
	170	+ foreach (array_reverse($history) as $entry) {
	171	+ // Preserve code blocks while sanitizing other HTML
	172	+ $clean_content = wp_kses($entry['content'], $allowed_tags);
	173	+
	174	+ // Detect code blocks in content
	175	+ $has_code = false;
	176	+// Replace the HTML check with:
	177	+// Allow messages that contain code blocks or are plain text
	178	+if (strpos($clean_content, '<pre') === false &&
	179	+ strpos($clean_content, '<code') === false &&
	180	+ $clean_content !== strip_tags($entry['content'])) {
	181	+ continue;
	182	+}
	183	+
	184	+ // Skip entries that lost significant content during sanitization
	185	+ if (!$has_code && $clean_content !== strip_tags($entry['content'])) {
	186	+ continue;
	187	+ }
	188	+
	189	+ // More accurate token estimation (1 token ≈ 4 characters)
	190	+ $token_estimate = ceil(mb_strlen($clean_content, 'UTF-8') / 4);
	191	+
	192	+ // Check token budget with the new estimate
	193	+ if (($current_token_count + $token_estimate + $reserved_tokens) > $max_tokens) {
	194	+ // Try to fit partial content if it's the first entry
	195	+ if (empty($formatted_history)) {
	196	+ $clean_content = mb_substr($clean_content, 0, ($max_tokens - $reserved_tokens) * 4);
	197	+ $token_estimate = ceil(mb_strlen($clean_content, 'UTF-8') / 4);
	198	+ } else {
	199	+ break;
	200	+ }
	201	+ }
	202	+
	203	+ // Add to formatted history
	204	+ $formatted_history[] = [
	205	+ 'role' => $entry['role'],
	206	+ 'content' => $clean_content
	207	+ ];
	208	+
	209	+ $current_token_count += $token_estimate;
	210	+ }
	211	+
	212	+ // Reverse back to maintain chronological order
	213	+ $formatted_history = array_reverse($formatted_history);
	214	+
	215	+ // Add system message about code context
	216	+ array_unshift($formatted_history, [
	217	+ 'role' => 'system',
	218	+ 'content' => 'Preserved code blocks are marked with [CODE BLOCK PRESERVED]. '
	219	+ . 'Maintain formatting and syntax highlighting when referencing code.'
	220	+ ]);
	221	+
	222	+ return $formatted_history;
	223	+}
	224	+
	225	+public function register_routes() {
	226	+ //error_log(esc_html__('Registering MxChat REST routes', 'mxchat'));
	227	+
	228	+ register_rest_route('mxchat/v1', '/stream', [
	229	+ 'methods' => 'GET',
	230	+ 'callback' => [$this, 'mxchat_stream_events'],
	231	+ 'permission_callback' => [$this, 'verify_chat_session'],
	232	+ ]);
	233	+
	234	+ register_rest_route('mxchat/v1', '/agent-response', [
	235	+ 'methods' => 'POST',
	236	+ 'callback' => [$this, 'mxchat_handle_agent_response'],
	237	+ 'permission_callback' => [$this, 'verify_slack_request'],
	238	+ ]);
	239	+
	240	+ register_rest_route('mxchat/v1', '/slack-interaction', [
	241	+ 'methods' => 'POST',
	242	+ 'callback' => [$this, 'handle_slack_interaction'],
	243	+ 'permission_callback' => [$this, 'verify_slack_request'],
	244	+ ]);
	245	+
	246	+ register_rest_route('mxchat/v1', '/slack-messages', [
	247	+ 'methods' => 'POST',
	248	+ 'callback' => [$this, 'handle_slack_messages'],
	249	+ 'permission_callback' => [$this, 'verify_slack_request'],
	250	+ ]);
	251	+
	252	+ //error_log(esc_html__('MxChat REST routes registered', 'mxchat'));
	253	+}
	254	+
	255	+/**
	256	+ * Verify valid chat session
	257	+ */
	258	+public function verify_chat_session($request) {
	259	+ $session_id = $request->get_param('session_id');
	260	+ if (empty($session_id)) {
	261	+ //error_log(esc_html__('Empty session ID in chat request', 'mxchat'));
	262	+ return false;
	263	+ }
	264	+
	265	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	266	+ return $chat_mode === 'agent';
	267	+}
	268	+
	269	+/**
	270	+ * Verify request is coming from Slack.
	271	+ *
	272	+ * @param WP_REST_Request $request
	273	+ * @return bool True if valid, false otherwise.
	274	+ */
	275	+public function verify_slack_request($request) {
	276	+ // Get the Slack signing secret from your plugin options
	277	+ $valid_key = $this->options['live_agent_secret_key'] ?? '';
	278	+
	279	+ if (empty($valid_key)) {
	280	+ //error_log(esc_html__('Slack signing secret not configured', 'mxchat'));
	281	+ return false;
	282	+ }
	283	+
	284	+ $timestamp = $request->get_header('X-Slack-Request-Timestamp');
	285	+ $slack_signature = $request->get_header('X-Slack-Signature');
	286	+
	287	+ // Verify timestamp to prevent replay attacks
	288	+ if (abs(time() - intval($timestamp)) > 300) {
	289	+ //error_log(esc_html__('Slack request timestamp too old', 'mxchat'));
	290	+ return false;
	291	+ }
	292	+
	293	+ // Get raw request body
	294	+ $request_body = file_get_contents('php://input');
	295	+
	296	+ // Create the signature base string
	297	+ $sig_basestring = "v0:{$timestamp}:{$request_body}";
	298	+
	299	+ // Calculate expected signature
	300	+ $my_signature = 'v0=' . hash_hmac('sha256', $sig_basestring, $valid_key);
	301	+
	302	+ // Compare signatures
	303	+ return hash_equals($my_signature, $slack_signature);
	304	+}
	305	+public function mxchat_stream_events(WP_REST_Request $request) {
	306	+ header('Content-Type: text/event-stream');
	307	+ header('Cache-Control: no-cache');
	308	+ header('Connection: keep-alive');
	309	+
	310	+ $session_id = sanitize_text_field($request->get_param('session_id'));
	311	+ $last_seen_id = sanitize_text_field($request->get_param('last_seen_id')) ?: '';
	312	+
	313	+ if (empty($session_id)) {
	314	+ echo esc_html__("event: error\ndata: ", 'mxchat') . esc_html__('Missing session_id', 'mxchat') . "\n\n";
	315	+ flush();
	316	+ exit;
	317	+ }
	318	+
	319	+ $history = get_option("mxchat_history_{$session_id}", []);
	320	+
	321	+ // Filter only new messages
	322	+ $new_messages = array_filter($history, function ($message) use ($last_seen_id) {
	323	+ return !empty($message['id']) && $message['id'] > $last_seen_id;
	324	+ });
	325	+
	326	+ // Send new messages if available
	327	+ if (!empty($new_messages)) {
	328	+ echo esc_html__("event: newMessages\ndata: ", 'mxchat') . json_encode(array_values($new_messages)) . "\n\n";
	329	+ } else {
	330	+ // Keep the connection alive
	331	+ echo esc_html__("event: keepAlive\ndata: ", 'mxchat') . "{}\n\n";
	332	+ }
	333	+ flush();
	334	+ exit;
	335	+}
	336	+
	337	+
	338	+
	339	+
	340	+private function mxchat_save_chat_message($session_id, $role, $message, $originating_page = null) {
	341	+ global $wpdb;
	342	+ $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
	343	+ //error_log("[DEBUG] mxchat_save_chat_message -> START for session_id: {$session_id}, role: {$role}");
	344	+
	345	+ // Check if this is the first message in a new session (before any other database operations)
	346	+ $is_new_session = false;
	347	+ if ($role === 'user') { // Only check for user messages, not bot responses
	348	+ $existing_messages = $wpdb->get_var($wpdb->prepare(
	349	+ "SELECT COUNT(*) FROM $table_name WHERE session_id = %s",
	350	+ $session_id
	351	+ ));
	352	+ $is_new_session = ($existing_messages == 0);
	353	+
	354	+ // Log for debugging
	355	+ if ($is_new_session) {
	356	+ //error_log("[DEBUG] This is a NEW session - first message");
	357	+ }
	358	+ }
	359	+
	360	+ // SECURITY FIX: Set session ownership for new sessions
	361	+ if ($is_new_session && $role === 'user') {
	362	+ $current_user_identifier = MxChat_User::mxchat_get_user_identifier();
	363	+ $session_owner_key = "mxchat_session_owner_{$session_id}";
	364	+
	365	+ // Only set ownership if not already set
	366	+ if (!get_option($session_owner_key)) {
	367	+ update_option($session_owner_key, $current_user_identifier, 'no');
	368	+ //error_log("[DEBUG] Set session ownership for {$session_id} to {$current_user_identifier}");
	369	+ }
	370	+ }
	371	+
	372	+ // 1) Extract agent name if present
	373	+ $agent_name = '';
	374	+ if (preg_match('/^Agent: (.*?) - /', $message, $matches)) {
	375	+ $agent_name = $matches[1];
	376	+ $message = str_replace("Agent: $agent_name - ", '', $message);
	377	+ $session_meta_key = "mxchat_agent_name_{$session_id}";
	378	+ if (empty(get_option($session_meta_key))) {
	379	+ update_option($session_meta_key, $agent_name);
	380	+ //error_log("[DEBUG] mxchat_save_chat_message -> Stored agent_name in option: {$session_meta_key} => {$agent_name}");
	381	+ }
	382	+ }
	383	+
	384	+ // 2) Generate unique message_id
	385	+ $message_id = uniqid();
	386	+ //error_log("[DEBUG] mxchat_save_chat_message -> Generated message_id: {$message_id}");
	387	+
	388	+ // 3) Determine user_id
	389	+ $user_id = is_user_logged_in() ? get_current_user_id() : 0;
	390	+
	391	+ // 4) Determine user_identifier
	392	+ $user_identifier = $agent_name
	393	+ ? $agent_name
	394	+ : MxChat_User::mxchat_get_user_identifier();
	395	+
	396	+ // 5) Determine displayed_name
	397	+ $user_email = MxChat_User::mxchat_get_user_email();
	398	+ $displayed_name = $agent_name ? $agent_name : ($user_email ?: $user_identifier);
	399	+
	400	+ // 6) Check for a saved email in wp_options
	401	+ $email_option_key = "mxchat_email_{$session_id}";
	402	+ $saved_email = get_option($email_option_key);
	403	+ //error_log("[DEBUG] mxchat_save_chat_message -> Checking wp_options for email_option_key: {$email_option_key}, found: {$saved_email}");
	404	+
	405	+ // Check for a saved name in wp_options
	406	+ $name_option_key = "mxchat_name_{$session_id}";
	407	+ $saved_name = get_option($name_option_key);
	408	+ //error_log("[DEBUG] mxchat_save_chat_message -> Checking wp_options for name_option_key: {$name_option_key}, found: {$saved_name}");
	409	+
	410	+ // If found, update DB user_email and user_name
	411	+ if ($saved_email || $saved_name) {
	412	+ $update_data = [];
	413	+ if ($saved_email) {
	414	+ $update_data['user_email'] = $saved_email;
	415	+ }
	416	+ if ($saved_name) {
	417	+ $update_data['user_name'] = $saved_name;
	418	+ }
	419	+
	420	+ if (!empty($update_data)) {
	421	+ $update_res = $wpdb->update(
	422	+ $table_name,
	423	+ $update_data,
	424	+ ['session_id' => $session_id],
	425	+ array_fill(0, count($update_data), '%s'),
	426	+ ['%s']
	427	+ );
	428	+ //error_log("[DEBUG] mxchat_save_chat_message -> Attempted DB user_email/user_name update for session_id {$session_id}. update_res: {$update_res}");
	429	+ }
	430	+ }
	431	+
	432	+ // 7) Save to session history in wp_options
	433	+ $history_key = "mxchat_history_{$session_id}";
	434	+ $history = get_option($history_key, []);
	435	+ $history[] = [
	436	+ 'id' => $message_id,
	437	+ 'role' => $role,
	438	+ 'content' => $message,
	439	+ 'timestamp' => round(microtime(true) * 1000),
	440	+ 'agent_name' => $displayed_name,
	441	+ ];
	442	+ update_option($history_key, $history, 'no');
	443	+ //error_log("[DEBUG] mxchat_save_chat_message -> Updated session history in option: {$history_key}");
	444	+
	445	+ // 8) Save the message to DB (INSERT)
	446	+ $insert_data = [
	447	+ 'user_id' => $user_id,
	448	+ 'user_identifier'=> $user_identifier,
	449	+ 'user_email' => $saved_email ?: $user_email,
	450	+ 'user_name' => $saved_name ?: '', // Add name to insert data
	451	+ 'session_id' => $session_id,
	452	+ 'role' => $role,
	453	+ 'message' => $message,
	454	+ 'timestamp' => current_time('mysql', 1),
	455	+ ];
	456	+
	457	+ // IMPROVED: Handle originating page data
	458	+ $columns_exist = $wpdb->get_var("SHOW COLUMNS FROM $table_name LIKE 'originating_page_url'");
	459	+
	460	+ if ($columns_exist) {
	461	+ if ($is_new_session && $role === 'user') {
	462	+ // For the first user message, set originating page data
	463	+
	464	+ // First check if we have it from the parameter
	465	+ if ($originating_page && !empty($originating_page['url'])) {
	466	+ $insert_data['originating_page_url'] = $originating_page['url'];
	467	+ $insert_data['originating_page_title'] = $originating_page['title'] ?? '';
	468	+
	469	+ //error_log("[DEBUG] Setting originating page from parameter: " . $originating_page['url']);
	470	+ }
	471	+ // Otherwise check if it's stored in the instance property
	472	+ else if (isset($this->pending_originating_page) && !empty($this->pending_originating_page['url'])) {
	473	+ $insert_data['originating_page_url'] = $this->pending_originating_page['url'];
	474	+ $insert_data['originating_page_title'] = $this->pending_originating_page['title'] ?? '';
	475	+
	476	+ //error_log("[DEBUG] Setting originating page from pending_originating_page: " . $this->pending_originating_page['url']);
	477	+
	478	+ // Clear after using
	479	+ unset($this->pending_originating_page);
	480	+ }
	481	+ // Fallback to HTTP_REFERER if nothing else is available
	482	+ else if (isset($_SERVER['HTTP_REFERER'])) {
	483	+ $referer_url = esc_url_raw($_SERVER['HTTP_REFERER']);
	484	+ $insert_data['originating_page_url'] = $referer_url;
	485	+
	486	+ // Generate title from URL
	487	+ $parsed_url = parse_url($referer_url);
	488	+ $path = isset($parsed_url['path']) ? trim($parsed_url['path'], '/') : '';
	489	+
	490	+ if (empty($path) || $path === 'index.php' || $path === 'index.html') {
	491	+ $insert_data['originating_page_title'] = 'Homepage';
	492	+ } else {
	493	+ $title = str_replace(['-', '_', '/', '.php', '.html'], ' ', $path);
	494	+ $insert_data['originating_page_title'] = ucwords(trim($title));
	495	+ }
	496	+
	497	+ //error_log("[DEBUG] Setting originating page from HTTP_REFERER: " . $referer_url);
	498	+ }
	499	+
	500	+ // Store for this session so all messages have the same originating page
	501	+ if (!empty($insert_data['originating_page_url'])) {
	502	+ update_option("mxchat_originating_page_{$session_id}", [
	503	+ 'url' => $insert_data['originating_page_url'],
	504	+ 'title' => $insert_data['originating_page_title']
	505	+ ], 'no');
	506	+ }
	507	+ } else {
	508	+ // For subsequent messages in the session, use the stored originating page
	509	+ $stored_originating = get_option("mxchat_originating_page_{$session_id}");
	510	+ if ($stored_originating && !empty($stored_originating['url'])) {
	511	+ $insert_data['originating_page_url'] = $stored_originating['url'];
	512	+ $insert_data['originating_page_title'] = $stored_originating['title'] ?? '';
	513	+ }
	514	+ }
	515	+ }
	516	+
	517	+ $wpdb->insert($table_name, $insert_data);
	518	+ //error_log("[DEBUG] mxchat_save_chat_message -> Inserted message into DB. row_id: {$wpdb->insert_id}, data: " . print_r($insert_data, true));
	519	+
	520	+ // 9) Send notification email if this is the first user message in a new session
	521	+ if ($wpdb->insert_id && $is_new_session && $role === 'user') {
	522	+ $this->send_new_chat_notification($session_id, array(
	523	+ 'identifier' => $user_identifier,
	524	+ 'email' => $saved_email ?: $user_email,
	525	+ 'ip' => $_SERVER['REMOTE_ADDR']
	526	+ ));
	527	+ }
	528	+
	529	+ //error_log("[DEBUG] mxchat_save_chat_message -> END for session_id: {$session_id}");
	530	+ return $message_id;
	531	+}
	532	+
	533	+private function send_new_chat_notification($session_id, $user_info = array()) {
	534	+ $options = get_option('mxchat_transcripts_options');
	535	+
	536	+ // Check if notifications are enabled
	537	+ if (empty($options['mxchat_enable_notifications'])) {
	538	+ return false;
	539	+ }
	540	+
	541	+ // Get notification email
	542	+ $to = !empty($options['mxchat_notification_email']) ?
	543	+ $options['mxchat_notification_email'] :
	544	+ get_option('admin_email');
	545	+
	546	+ if (!is_email($to)) {
	547	+ return false;
	548	+ }
	549	+
	550	+ // Prepare email content
	551	+ $subject = sprintf('[%s] New Chat Session Started', get_bloginfo('name'));
	552	+
	553	+ $user_identifier = isset($user_info['identifier']) ? $user_info['identifier'] : 'Guest';
	554	+ $user_email = isset($user_info['email']) ? $user_info['email'] : 'Not provided';
	555	+ $user_ip = isset($user_info['ip']) ? $user_info['ip'] : $_SERVER['REMOTE_ADDR'];
	556	+
	557	+ $message = sprintf(
	558	+ "A new chat session has started on your website.\n\n" .
	559	+ "Session ID: %s\n" .
	560	+ "User: %s\n" .
	561	+ "Email: %s\n" .
	562	+ "IP Address: %s\n" .
	563	+ "Time: %s\n\n" .
	564	+ "View transcripts: %s",
	565	+ $session_id,
	566	+ $user_identifier,
	567	+ $user_email,
	568	+ $user_ip,
	569	+ current_time('mysql'),
	570	+ admin_url('admin.php?page=mxchat-transcripts')
	571	+ );
	572	+
	573	+ // Send email
	574	+ return wp_mail($to, $subject, $message);
	575	+}
	576	+
	577	+public function mxchat_handle_save_email_and_response() {
	578	+ //error_log('[DEBUG] ---------- mxchat_handle_save_email_and_response START ----------');
	579	+ //error_log('DEBUG: POST data: ' . print_r($_POST, true));
	580	+
	581	+ // Validate nonce
	582	+ if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
	583	+ //error_log(esc_html__('[ERROR] Invalid nonce in mxchat_handle_save_email_and_response', 'mxchat'));
	584	+ wp_send_json_error(['message' => esc_html__('Invalid nonce.', 'mxchat')]);
	585	+ wp_die();
	586	+ }
	587	+
	588	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	589	+ $email = isset($_POST['email']) ? sanitize_email($_POST['email']) : '';
	590	+ $name = isset($_POST['name']) ? sanitize_text_field($_POST['name']) : '';
	591	+
	592	+ //error_log("[DEBUG] handle_save_email_and_response -> session_id: {$session_id}, email: {$email}, name: {$name}");
	593	+
	594	+ if (empty($session_id) || empty($email)) {
	595	+ //error_log("[ERROR] Missing session_id or email: session_id={$session_id}, email={$email}");
	596	+ wp_send_json_error(['message' => esc_html__('Session ID or email is missing.', 'mxchat')]);
	597	+ wp_die();
	598	+ }
	599	+
	600	+ // Validate name if provided (check if name field is enabled and name is required)
	601	+ $options = get_option('mxchat_options', []);
	602	+ $name_field_enabled = isset($options['enable_name_field']) &&
	603	+ ($options['enable_name_field'] === '1' || $options['enable_name_field'] === 'on');
	604	+
	605	+ if ($name_field_enabled && (empty($name) || strlen(trim($name)) < 2 || strlen(trim($name)) > 100)) {
	606	+ //error_log("[ERROR] Invalid name: {$name} (enabled: {$name_field_enabled})");
	607	+ wp_send_json_error(['message' => esc_html__('Name must be between 2 and 100 characters.', 'mxchat')]);
	608	+ wp_die();
	609	+ }
	610	+
	611	+ // 1) Always store email in wp_options
	612	+ $email_option_key = "mxchat_email_{$session_id}";
	613	+ update_option($email_option_key, $email);
	614	+ //error_log("[DEBUG] handle_save_email_and_response -> updated option: {$email_option_key} => {$email}");
	615	+
	616	+ // Store name in wp_options if provided
	617	+ if (!empty($name)) {
	618	+ $name_option_key = "mxchat_name_{$session_id}";
	619	+ update_option($name_option_key, $name);
	620	+ //error_log("[DEBUG] handle_save_email_and_response -> updated option: {$name_option_key} => {$name}");
	621	+ }
	622	+
	623	+ // 2) (Optional) Also store in DB if a row already exists
	624	+ global $wpdb;
	625	+ $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
	626	+
	627	+ // Make sure we have a valid placeholder in prepare
	628	+ $sql = $wpdb->prepare("SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s", $session_id);
	629	+ $session_count = $wpdb->get_var($sql);
	630	+
	631	+ //error_log("[DEBUG] handle_save_email_and_response -> session_count for {$session_id}: {$session_count} (SQL: {$sql})");
	632	+
	633	+ if ($session_count) {
	634	+ // Update both user_email and user_name if row(s) exist
	635	+ if (!empty($name)) {
	636	+ $update_sql = $wpdb->prepare(
	637	+ "UPDATE {$table_name} SET user_email = %s, user_name = %s WHERE session_id = %s",
	638	+ $email,
	639	+ $name,
	640	+ $session_id
	641	+ );
	642	+ } else {
	643	+ $update_sql = $wpdb->prepare(
	644	+ "UPDATE {$table_name} SET user_email = %s WHERE session_id = %s",
	645	+ $email,
	646	+ $session_id
	647	+ );
	648	+ }
	649	+ $wpdb->query($update_sql);
	650	+ //error_log("[DEBUG] handle_save_email_and_response -> DB updated: {$update_sql}");
	651	+ } else {
	652	+ //error_log("[INFO] handle_save_email_and_response -> No DB entry for {$session_id}, so email/name is only in wp_options.");
	653	+ }
	654	+
	655	+ // Provide success response (same as original)
	656	+ $bot_message = __('Thanks for providing your email! You can continue chatting now.', 'mxchat');
	657	+ //error_log("[DEBUG] handle_save_email_and_response -> success, returning bot_message: {$bot_message}");
	658	+ wp_send_json_success(['message' => $bot_message]);
	659	+ wp_die();
	660	+}
	661	+
	662	+public function mxchat_check_email_provided() {
	663	+ //error_log('[DEBUG] ---------- mxchat_check_email_provided START ----------');
	664	+
	665	+ if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
	666	+ //error_log('[ERROR] Invalid nonce in mxchat_check_email_provided');
	667	+ wp_send_json_error(['message' => esc_html__('Invalid nonce', 'mxchat')]);
	668	+ }
	669	+
	670	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	671	+ if (empty($session_id)) {
	672	+ //error_log('[ERROR] No session ID provided in mxchat_check_email_provided');
	673	+ wp_send_json_error(['message' => esc_html__('No session ID provided', 'mxchat')]);
	674	+ }
	675	+
	676	+ // Check if the user is logged in
	677	+ if (is_user_logged_in()) {
	678	+ $current_user = wp_get_current_user();
	679	+ //error_log("[DEBUG] User is logged in as {$current_user->user_email}");
	680	+
	681	+ // Get user's display name for logged in users
	682	+ $user_name = !empty($current_user->display_name) ? $current_user->display_name :
	683	+ (!empty($current_user->first_name) ? $current_user->first_name : '');
	684	+
	685	+ $response_data = ['logged_in' => true, 'email' => $current_user->user_email];
	686	+ if (!empty($user_name)) {
	687	+ $response_data['name'] = $user_name;
	688	+ }
	689	+
	690	+ wp_send_json_success($response_data);
	691	+ }
	692	+
	693	+ // Check if name field is required
	694	+ $options = get_option('mxchat_options', []);
	695	+ $name_field_enabled = isset($options['enable_name_field']) &&
	696	+ ($options['enable_name_field'] === '1' || $options['enable_name_field'] === 'on');
	697	+
	698	+ $email_option_key = "mxchat_email_{$session_id}";
	699	+ $stored_email = get_option($email_option_key, '');
	700	+
	701	+ // Check for stored name
	702	+ $name_option_key = "mxchat_name_{$session_id}";
	703	+ $stored_name = get_option($name_option_key, '');
	704	+
	705	+ //error_log("[DEBUG] mxchat_check_email_provided -> Checking email option: {$email_option_key}, found: {$stored_email}");
	706	+ //error_log("[DEBUG] mxchat_check_email_provided -> Checking name option: {$name_option_key}, found: {$stored_name}, required: " . ($name_field_enabled ? 'yes' : 'no'));
	707	+
	708	+ // Check if we have email and name (if name is required)
	709	+ $has_required_info = !empty($stored_email);
	710	+
	711	+ if ($name_field_enabled) {
	712	+ $has_required_info = $has_required_info && !empty($stored_name);
	713	+ }
	714	+
	715	+ if ($has_required_info) {
	716	+ //error_log("[DEBUG] mxchat_check_email_provided -> Required info found, returning success");
	717	+
	718	+ $response_data = ['email' => $stored_email];
	719	+ if (!empty($stored_name)) {
	720	+ $response_data['name'] = $stored_name;
	721	+ }
	722	+
	723	+ wp_send_json_success($response_data);
	724	+ } else {
	725	+ //error_log("[DEBUG] mxchat_check_email_provided -> Required info missing, returning error");
	726	+ wp_send_json_error(['message' => esc_html__('No email found', 'mxchat')]);
	727	+ }
	728	+}
	729	+
	730	+/**
	731	+ * Send error response in appropriate format based on streaming mode
	732	+ * ADDED: Helper method to consistently handle errors in both streaming and non-streaming modes
	733	+ *
	734	+ * @param string $error_message The error message to display
	735	+ * @param string $error_code Optional error code for debugging
	736	+ */
	737	+private function send_error_response($error_message, $error_code = 'api_error') {
	738	+ if ($this->is_streaming) {
	739	+ echo "data: " . json_encode([
	740	+ 'error' => true,
	741	+ 'error_message' => $error_message,
	742	+ 'error_code' => $error_code,
	743	+ 'text' => $error_message,
	744	+ 'message' => $error_message
	745	+ ]) . "\n\n";
	746	+ echo "data: [DONE]\n\n";
	747	+ flush();
	748	+ } else {
	749	+ wp_send_json_error([
	750	+ 'error_message' => $error_message,
	751	+ 'error_code' => $error_code
	752	+ ]);
	753	+ }
	754	+ wp_die();
	755	+}
	756	+
	757	+public function mxchat_handle_chat_request() {
	758	+ global $wpdb;
	759	+
	760	+ // Debug: Log incoming bot_id
	761	+ $bot_id = isset($_POST['bot_id']) ? sanitize_key($_POST['bot_id']) : 'default';
	762	+ error_log("=== MXCHAT DEBUG: Starting chat request ===");
	763	+ error_log("MXCHAT DEBUG: Bot ID received: " . $bot_id);
	764	+
	765	+ // Get bot-specific options
	766	+ $bot_options = $this->get_bot_options($bot_id);
	767	+ $current_options = !empty($bot_options) ? $bot_options : $this->options;
	768	+
	769	+ // Check if this is a streaming request
	770	+ $is_streaming = isset($_POST['action']) && $_POST['action'] === 'mxchat_stream_chat' &&
	771	+ isset($current_options['enable_streaming_toggle']) && $current_options['enable_streaming_toggle'] === 'on';
	772	+
	773	+ // ADDED: Store streaming state in class property for use in private methods
	774	+ $this->is_streaming = $is_streaming;
	775	+
	776	+ // Set streaming headers if needed
	777	+ if ($is_streaming) {
	778	+ // Disable output buffering
	779	+ while (ob_get_level()) {
	780	+ ob_end_flush(); // Changed from ob_end_clean()
	781	+ }
	782	+
	783	+ // Set headers for SSE
	784	+ header('Content-Type: text/event-stream');
	785	+ header('Cache-Control: no-cache');
	786	+ header('Connection: keep-alive');
	787	+ header('X-Accel-Buffering: no');
	788	+
	789	+ // Add these new lines:
	790	+ ob_implicit_flush(true);
	791	+ flush();
	792	+ }
	793	+
	794	+ // Check if MX Chat Moderation is active
	795	+ if (class_exists('MX_Chat_Moderation')) {
	796	+ // Get user email and IP
	797	+ $user_email = '';
	798	+ $user_ip = $_SERVER['REMOTE_ADDR'];
	799	+
	800	+ // If user is logged in, get their email
	801	+ if (is_user_logged_in()) {
	802	+ $current_user = wp_get_current_user();
	803	+ $user_email = $current_user->user_email;
	804	+ }
	805	+
	806	+ // Create ban handler instance
	807	+ $ban_handler = new MX_Chat_Ban_Handler();
	808	+
	809	+ // Check if user is banned by IP
	810	+ if ($ban_handler->check_ban($user_ip, 'ip')) {
	811	+ wp_send_json([
	812	+ 'success' => false,
	813	+ 'message' => esc_html__('Access denied. Your IP address has been banned.', 'mxchat'),
	814	+ 'status' => 'banned'
	815	+ ]);
	816	+ wp_die();
	817	+ }
	818	+
	819	+ // If user is logged in, also check email
	820	+ if (!empty($user_email) && $ban_handler->check_ban($user_email, 'email')) {
	821	+ wp_send_json([
	822	+ 'success' => false,
	823	+ 'message' => esc_html__('Access denied. Your email address has been banned.', 'mxchat'),
	824	+ 'status' => 'banned'
	825	+ ]);
	826	+ wp_die();
	827	+ }
	828	+ }
	829	+
	830	+ $this->fallbackResponse = ['text' => '', 'html' => '', 'images' => []];
	831	+ $this->productCardHtml = '';
	832	+
	833	+ // Get the actual WordPress user ID if logged in
	834	+ $is_logged_in = is_user_logged_in();
	835	+ if ($is_logged_in) {
	836	+ $user_id = get_current_user_id(); // This will get the actual WordPress user ID
	837	+ } else {
	838	+ // For logged-out users, use your existing identifier method
	839	+ $user_id = $this->mxchat_get_user_identifier();
	840	+ }
	841	+
	842	+ // Get and sanitize the user identifier
	843	+ $user_id = sanitize_key($user_id);
	844	+
	845	+ // Check rate limit using new settings structure
	846	+ $rate_limit_result = $this->check_rate_limit();
	847	+
	848	+ if ($rate_limit_result !== true) {
	849	+ wp_send_json([
	850	+ 'success' => false,
	851	+ 'message' => $rate_limit_result['message'],
	852	+ 'status' => 'rate_limit_exceeded'
	853	+ ]);
	854	+ wp_die();
	855	+ }
	856	+
	857	+ // Rest of your existing code...
	858	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	859	+
	860	+ if (empty($session_id)) {
	861	+ wp_send_json_error(esc_html__('Session ID is missing.', 'mxchat'));
	862	+ wp_die();
	863	+ }
	864	+
	865	+ // SECURITY FIX: Verify session ownership before processing chat request
	866	+ $current_user_identifier = MxChat_User::mxchat_get_user_identifier();
	867	+ $session_owner = get_option("mxchat_session_owner_{$session_id}");
	868	+
	869	+ if ($session_owner && $session_owner !== $current_user_identifier) {
	870	+ wp_send_json_error(esc_html__('Unauthorized access.', 'mxchat'));
	871	+ wp_die();
	872	+ }
	873	+
	874	+ // Validate and sanitize the incoming message
	875	+ if (empty($_POST['message'])) {
	876	+ wp_send_json_error(esc_html__('No message received.', 'mxchat'));
	877	+ wp_die();
	878	+ }
	879	+
	880	+
	881	+ // Track originating page for first message in session
	882	+ $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
	883	+
	884	+ // Check if originating page columns exist
	885	+ $columns_exist = $wpdb->get_var("SHOW COLUMNS FROM $table_name LIKE 'originating_page_url'");
	886	+
	887	+ if ($columns_exist) {
	888	+ // Check if this session already has messages
	889	+ $message_count = $wpdb->get_var($wpdb->prepare(
	890	+ "SELECT COUNT(*) FROM $table_name WHERE session_id = %s",
	891	+ $session_id
	892	+ ));
	893	+
	894	+ // If this is the first message in the session
	895	+ if ($message_count == 0) {
	896	+ // Get originating page from JavaScript (preferred) or HTTP_REFERER (fallback)
	897	+ $originating_url = '';
	898	+ $originating_title = '';
	899	+
	900	+ // Try to get from POST data first (sent by JavaScript)
	901	+ if (isset($_POST['current_page_url'])) {
	902	+ $originating_url = esc_url_raw($_POST['current_page_url']);
	903	+ $originating_title = isset($_POST['current_page_title'])
	904	+ ? sanitize_text_field($_POST['current_page_title'])
	905	+ : '';
	906	+ }
	907	+ // Fallback to HTTP_REFERER if not provided by JavaScript
	908	+ else if (isset($_SERVER['HTTP_REFERER'])) {
	909	+ $originating_url = esc_url_raw($_SERVER['HTTP_REFERER']);
	910	+ }
	911	+
	912	+ // Generate title if we have URL but no title
	913	+ if ($originating_url && empty($originating_title)) {
	914	+ $parsed_url = parse_url($originating_url);
	915	+ $path = isset($parsed_url['path']) ? trim($parsed_url['path'], '/') : '';
	916	+
	917	+ if (empty($path) || $path === 'index.php' || $path === 'index.html') {
	918	+ $originating_title = 'Homepage';
	919	+ } else {
	920	+ // Clean up the path to make a readable title
	921	+ $originating_title = str_replace(['-', '_', '/', '.php', '.html'], ' ', $path);
	922	+ $originating_title = ucwords(trim($originating_title));
	923	+ }
	924	+ }
	925	+
	926	+ // Store for later use when saving the message
	927	+ $this->pending_originating_page = [
	928	+ 'url' => $originating_url,
	929	+ 'title' => $originating_title
	930	+ ];
	931	+ }
	932	+ }
	933	+
	934	+
	935	+
	936	+ // Get page context if provided
	937	+ $page_context = null;
	938	+ if (isset($_POST['page_context']) && !empty($_POST['page_context'])) {
	939	+ $page_context_raw = stripslashes($_POST['page_context']);
	940	+ $page_context = json_decode($page_context_raw, true);
	941	+
	942	+ // Validate page context structure
	943	+ if (is_array($page_context) &&
	944	+ isset($page_context['url']) &&
	945	+ isset($page_context['title']) &&
	946	+ isset($page_context['content'])) {
	947	+
	948	+ // Sanitize page context
	949	+ $page_context['url'] = esc_url_raw($page_context['url']);
	950	+ $page_context['title'] = sanitize_text_field($page_context['title']);
	951	+ $page_context['content'] = wp_kses_post($page_context['content']);
	952	+ } else {
	953	+ $page_context = null;
	954	+ }
	955	+ }
	956	+
	957	+ // Modify the message sanitization to preserve PHP tags in code blocks
	958	+ $allowed_tags = [
	959	+ 'pre' => [],
	960	+ 'code' => ['class' => true],
	961	+ 'span' => ['class' => true],
	962	+ 'div' => ['class' => true],
	963	+ ];
	964	+
	965	+ // First preserve code blocks
	966	+ $message = preg_replace_callback('/<pre><code.*?>.*?<\/code><\/pre>/s', function($matches) {
	967	+ return htmlspecialchars_decode($matches[0]);
	968	+ }, $_POST['message']);
	969	+
	970	+ // Then apply sanitization
	971	+ $message = wp_kses($message, $allowed_tags);
	972	+
	973	+ // Preserve code blocks from markdown conversion
	974	+ $message = preg_replace('/```(\w+)?\s*([\s\S]+?)```/s', '<pre><code class="$1">$2</code></pre>', $message);
	975	+ $message = apply_filters('mxchat_filter_message', $message, 'prompt', $session_id);
	976	+
	977	+ // ===== SIMPLIFIED TESTING PANEL INITIALIZATION =====
	978	+ // Always initialize testing data for admins (no toggle needed)
	979	+ $testing_data = null;
	980	+ if (current_user_can('administrator')) {
	981	+ // For vision messages, use the original user message for the query display
	982	+ $query_for_testing = $message;
	983	+ if (isset($_POST['vision_processed']) && $_POST['vision_processed'] && isset($_POST['original_user_message'])) {
	984	+ $query_for_testing = sanitize_textarea_field($_POST['original_user_message']);
	985	+ }
	986	+
	987	+ $testing_data = [
	988	+ 'query' => $query_for_testing,
	989	+ 'timestamp' => time(),
	990	+ 'top_matches' => [],
	991	+ 'action_matches' => [], // Initialize action matches array
	992	+ 'page_context' => $page_context, // Include page context in testing data
	993	+ 'is_vision' => isset($_POST['vision_processed']) && $_POST['vision_processed'],
	994	+ 'bot_id' => $bot_id // Include bot ID in testing data
	995	+ ];
	996	+
	997	+ // Get similarity threshold from bot options or default options
	998	+ $similarity_threshold = isset($current_options['similarity_threshold'])
	999	+ ? ((int) $current_options['similarity_threshold']) / 100
	1000	+ : 0.35;
	1001	+
	1002	+ $testing_data['similarity_threshold'] = $similarity_threshold;
	1003	+
	1004	+ // Determine knowledge base type using bot-specific config
	1005	+ $bot_pinecone_config = $this->get_bot_pinecone_config($bot_id);
	1006	+ $use_pinecone = isset($bot_pinecone_config['use_pinecone']) ? $bot_pinecone_config['use_pinecone'] : false;
	1007	+ $testing_data['knowledge_base_type'] = $use_pinecone ? 'Pinecone' : 'WordPress Database';
	1008	+ }
	1009	+ // ===== END SIMPLIFIED TESTING INITIALIZATION =====
	1010	+
	1011	+ // Add debug before and after:
	1012	+ //error_log('MxChat Core: About to call mxchat_pre_process_message filter with message: ' . $message);
	1013	+ $pre_processed_result = apply_filters('mxchat_pre_process_message', $message, $user_id, $session_id);
	1014	+ //error_log('MxChat Core: Filter returned: ' . (is_array($pre_processed_result) ? 'array' : $pre_processed_result));
	1015	+
	1016	+
	1017	+ // If the pre-processing returned a result (not the original message), use it directly
	1018	+ if (is_array($pre_processed_result) && isset($pre_processed_result['text'])) {
	1019	+ // Save the AI response
	1020	+ $this->mxchat_save_chat_message($session_id, 'bot', $pre_processed_result['text']);
	1021	+
	1022	+ // Save HTML content if provided
	1023	+ if (!empty($pre_processed_result['html'])) {
	1024	+ $this->mxchat_save_chat_message($session_id, 'bot', $pre_processed_result['html']);
	1025	+ }
	1026	+
	1027	+ // Add testing data if admin
	1028	+ $response_data = [
	1029	+ 'text' => $pre_processed_result['text'],
	1030	+ 'html' => $pre_processed_result['html'] ?? '',
	1031	+ 'session_id' => $session_id
	1032	+ ];
	1033	+
	1034	+ if ($testing_data !== null) {
	1035	+ $response_data['testing_data'] = $testing_data;
	1036	+ }
	1037	+
	1038	+ wp_send_json($response_data);
	1039	+ wp_die();
	1040	+ }
	1041	+
	1042	+ // Save the user's message - handle vision processed messages differently
	1043	+ if (isset($_POST['vision_processed']) && $_POST['vision_processed'] && isset($_POST['original_user_message'])) {
	1044	+ // For vision messages, save the original user message with image indicator
	1045	+ $original_message = sanitize_textarea_field($_POST['original_user_message']);
	1046	+ if (isset($_POST['vision_images_count']) && $_POST['vision_images_count'] > 0) {
	1047	+ $image_count = intval($_POST['vision_images_count']);
	1048	+ $original_message .= " [{$image_count} image(s)]";
	1049	+ }
	1050	+ $this->mxchat_save_chat_message($session_id, 'user', $original_message);
	1051	+ } else {
	1052	+ // Regular message - save as normal
	1053	+ $this->mxchat_save_chat_message($session_id, 'user', $message);
	1054	+ }
	1055	+
	1056	+
	1057	+ if (is_email($message)) {
	1058	+ // Add the email to Loops
	1059	+ $this->add_email_to_loops($message);
	1060	+
	1061	+ // Get the user's success message instruction using current_options
	1062	+ $user_success_message = $current_options['email_capture_response'] ?? __('Thank you for providing your email! You\'ve been added to our list.', 'mxchat');
	1063	+
	1064	+ // Set instruction for AI using the user's success message
	1065	+ $this->current_action_instruction = $user_success_message;
	1066	+
	1067	+ // Clear the email capture transient since we got the email
	1068	+ delete_transient('mxchat_email_capture_' . $user_id);
	1069	+ }
	1070	+
	1071	+ // Check if we're in an email capture flow but user hasn't provided email yet
	1072	+ elseif (get_transient('mxchat_email_capture_' . $user_id)) {
	1073	+ // Check if the message contains an email (not the whole message being an email)
	1074	+ if (preg_match('/\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b/', $message, $matches)) {
	1075	+ $extracted_email = $matches[0];
	1076	+
	1077	+ // Add the extracted email to Loops
	1078	+ $this->add_email_to_loops($extracted_email);
	1079	+
	1080	+ // Get the user's success message instruction using current_options
	1081	+ $user_success_message = $current_options['email_capture_response'] ?? __('Thank you for providing your email! You\'ve been added to our list.', 'mxchat');
	1082	+
	1083	+ // Set instruction for AI using the user's success message
	1084	+ $this->current_action_instruction = $user_success_message;
	1085	+
	1086	+ // Clear the email capture transient since we got the email
	1087	+ delete_transient('mxchat_email_capture_' . $user_id);
	1088	+ }
	1089	+ // If no email found but we're in capture mode, remind them
	1090	+ else {
	1091	+ // Get the original instruction to remind them using current_options
	1092	+ $original_instruction = $current_options['triggered_phrase_response'] ?? __("Please provide your email address.", 'mxchat');
	1093	+ $this->current_action_instruction = $original_instruction;
	1094	+ }
	1095	+ }
	1096	+
	1097	+ $intent_info = '';
	1098	+
	1099	+ // Check chat mode
	1100	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	1101	+
	1102	+ // Handle agent mode
	1103	+ // Handle agent mode
	1104	+ if ($chat_mode === 'agent') {
	1105	+ // First, check for switch intent before doing anything else
	1106	+ $intent_matched = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
	1107	+
	1108	+ // Capture action analysis for testing panel after intent check
	1109	+ if ($testing_data !== null && isset($this->last_action_analysis) && !empty($this->last_action_analysis)) {
	1110	+ $testing_data['action_matches'] = $this->last_action_analysis;
	1111	+ }
	1112	+
	1113	+ // Around line 506, in the agent mode handling section:
	1114	+ if ($intent_matched && !empty($this->fallbackResponse['text'])) {
	1115	+ // Update chat mode first
	1116	+ update_option("mxchat_mode_{$session_id}", 'ai');
	1117	+
	1118	+ // Clear any existing PDF context to start fresh
	1119	+ $this->clear_pdf_transients($session_id);
	1120	+
	1121	+ // Prepare clean switch response with explicit chat_mode
	1122	+ $response_data = [
	1123	+ 'text' => $this->fallbackResponse['text'],
	1124	+ 'html' => $this->fallbackResponse['html'] ?? '',
	1125	+ 'session_id' => $session_id,
	1126	+ 'chat_mode' => 'ai' // EXPLICITLY SET THIS
	1127	+ ];
	1128	+
	1129	+ if ($testing_data !== null) {
	1130	+ $response_data['testing_data'] = $testing_data;
	1131	+ }
	1132	+
	1133	+ // Save the mode switch message
	1134	+ $this->mxchat_save_chat_message($session_id, 'system', esc_html__('Switched to AI chat mode', 'mxchat'));
	1135	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['text']);
	1136	+
	1137	+ // Send response and exit
	1138	+ wp_send_json($response_data);
	1139	+ wp_die();
	1140	+ } elseif (!$intent_matched) {
	1141	+ // No intent matched, handle live agent message
	1142	+ try {
	1143	+ $this->mxchat_send_user_message_to_agent($message, $user_id, $session_id);
	1144	+
	1145	+ $agent_response = [
	1146	+ 'status' => 'waiting_for_agent',
	1147	+ 'message' => esc_html__('Message sent to live agent.', 'mxchat')
	1148	+ ];
	1149	+
	1150	+ if ($testing_data !== null) {
	1151	+ $agent_response['testing_data'] = $testing_data;
	1152	+ }
	1153	+
	1154	+ wp_send_json_success($agent_response);
	1155	+ } catch (\Exception $e) {
	1156	+ wp_send_json_error(esc_html__('Failed to send message to agent', 'mxchat'));
	1157	+ }
	1158	+ wp_die();
	1159	+ }
	1160	+ }
	1161	+
	1162	+ // Step 1: Check for new PDF URL in the message
	1163	+ if (!isset($_POST['vision_processed']) && preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
	1164	+ $new_pdf_url = $matches[0];
	1165	+
	1166	+ // Check if this is likely a PDF-related request
	1167	+ $pdf_keywords = ['pdf', 'document', 'read', 'analyze'];
	1168	+ $is_pdf_request = false;
	1169	+
	1170	+ foreach ($pdf_keywords as $keyword) {
	1171	+ if (stripos($message, $keyword) !== false) {
	1172	+ $is_pdf_request = true;
	1173	+ break;
	1174	+ }
	1175	+ }
	1176	+
	1177	+ // If it looks like a PDF request or we're waiting for a PDF URL
	1178	+ if ($is_pdf_request || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
	1179	+ // Validate HTTPS
	1180	+ if (wp_http_validate_url($new_pdf_url) && parse_url($new_pdf_url, PHP_URL_SCHEME) === 'https') {
	1181	+ // Extract filename from URL
	1182	+ $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
	1183	+
	1184	+ // Clear previous PDF transients
	1185	+ $this->clear_pdf_transients($session_id);
	1186	+
	1187	+ // Process new PDF using current_options
	1188	+ $max_pages = $current_options['pdf_max_pages'] ?? 69;
	1189	+ $embeddings = $this->fetch_and_split_pdf_pages($new_pdf_url, $max_pages);
	1190	+
	1191	+ if ($embeddings === 'too_many_pages') {
	1192	+ $error_text = sprintf(
	1193	+ $current_options['pdf_intent_error_text'] ??
	1194	+ esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
	1195	+ $max_pages
	1196	+ );
	1197	+ $this->fallbackResponse['text'] = $error_text;
	1198	+ } elseif ($embeddings) {
	1199	+ // Store new PDF information
	1200	+ $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
	1201	+
	1202	+ // If the filename is generic, create a more descriptive one
	1203	+ if (in_array($pdf_filename, ['results_download.php', 'download.php', 'view.php', 'pdf.php']) ||
	1204	+ strpos($pdf_filename, '.php') !== false) {
	1205	+ $pdf_filename = 'Document_' . date('Y-m-d_H-i') . '.pdf';
	1206	+ }
	1207	+
	1208	+ set_transient('mxchat_pdf_url_' . $session_id, $new_pdf_url, HOUR_IN_SECONDS);
	1209	+ set_transient('mxchat_pdf_filename_' . $session_id, $pdf_filename, HOUR_IN_SECONDS);
	1210	+ set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
	1211	+ set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
	1212	+
	1213	+ $success_text = $current_options['pdf_intent_success_text'] ??
	1214	+ esc_html__("I've processed the new PDF '{$pdf_filename}'. What questions do you have about it?", 'mxchat');
	1215	+
	1216	+ $pdf_response = [
	1217	+ 'success' => true,
	1218	+ 'message' => $success_text,
	1219	+ 'data' => [
	1220	+ 'filename' => $pdf_filename
	1221	+ ]
	1222	+ ];
	1223	+
	1224	+ if ($testing_data !== null) {
	1225	+ $pdf_response['testing_data'] = $testing_data;
	1226	+ }
	1227	+
	1228	+ wp_send_json($pdf_response);
	1229	+ wp_die();
	1230	+ } else {
	1231	+ $error_text = $current_options['pdf_intent_error_text'] ??
	1232	+ esc_html__("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
	1233	+ $this->fallbackResponse['text'] = $error_text;
	1234	+ }
	1235	+
	1236	+ $pdf_error_response = [
	1237	+ 'success' => false,
	1238	+ 'message' => $this->fallbackResponse['text']
	1239	+ ];
	1240	+
	1241	+ if ($testing_data !== null) {
	1242	+ $pdf_error_response['testing_data'] = $testing_data;
	1243	+ }
	1244	+
	1245	+ wp_send_json($pdf_error_response);
	1246	+ wp_die();
	1247	+ }
	1248	+ }
	1249	+ }
	1250	+
	1251	+
	1252	+ // Step 2: Detect intent and handle intent-based responses
	1253	+ $intent_result = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
	1254	+
	1255	+ // Capture action analysis for testing panel after intent check
	1256	+ if ($testing_data !== null && isset($this->last_action_analysis) && !empty($this->last_action_analysis)) {
	1257	+ $testing_data['action_matches'] = $this->last_action_analysis;
	1258	+ }
	1259	+
	1260	+ // Step 3: Handle the intent result appropriately
	1261	+ if ($intent_result !== false) {
	1262	+ // Intent was matched - ALWAYS send as JSON response, never streaming
	1263	+
	1264	+ if (is_array($intent_result) && (isset($intent_result['text']) || isset($intent_result['html']))) {
	1265	+ // Intent returned a direct response array
	1266	+ $response_data = [
	1267	+ 'text' => $intent_result['text'] ?? '',
	1268	+ 'html' => $intent_result['html'] ?? '',
	1269	+ 'session_id' => $session_id
	1270	+ ];
	1271	+
	1272	+ // IMPORTANT: Include chat_mode if present (for WhatsApp, Slack, etc.)
	1273	+ if (isset($intent_result['chat_mode'])) {
	1274	+ $response_data['chat_mode'] = $intent_result['chat_mode'];
	1275	+ }
	1276	+
	1277	+ if ($testing_data !== null) {
	1278	+ $response_data['testing_data'] = $testing_data;
	1279	+ }
	1280	+
	1281	+ // Clear streaming headers if they were set
	1282	+ if ($is_streaming) {
	1283	+ header_remove('Content-Type');
	1284	+ header_remove('Cache-Control');
	1285	+ header_remove('Connection');
	1286	+ header_remove('X-Accel-Buffering');
	1287	+ header('Content-Type: application/json');
	1288	+ }
	1289	+
	1290	+ wp_send_json($response_data);
	1291	+ wp_die();
	1292	+ } else if ($intent_result === true && (!empty($this->fallbackResponse['text']) || !empty($this->fallbackResponse['html']))) {
	1293	+ // Intent returned true and set fallbackResponse
	1294	+
	1295	+ // SAVE TO TRANSCRIPT FIRST
	1296	+ if (!empty($this->fallbackResponse['text'])) {
	1297	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['text']);
	1298	+ }
	1299	+ if (!empty($this->fallbackResponse['html'])) {
	1300	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['html']);
	1301	+ }
	1302	+
	1303	+ $response_data = [
	1304	+ 'text' => $this->fallbackResponse['text'] ?? '',
	1305	+ 'html' => $this->fallbackResponse['html'] ?? '',
	1306	+ 'session_id' => $session_id
	1307	+ ];
	1308	+
	1309	+ if (isset($this->fallbackResponse['chat_mode'])) {
	1310	+ $response_data['chat_mode'] = $this->fallbackResponse['chat_mode'];
	1311	+ }
	1312	+
	1313	+ if ($testing_data !== null) {
	1314	+ $response_data['testing_data'] = $testing_data;
	1315	+ }
	1316	+
	1317	+ // Clear streaming headers if they were set
	1318	+ if ($is_streaming) {
	1319	+ header_remove('Content-Type');
	1320	+ header_remove('Cache-Control');
	1321	+ header_remove('Connection');
	1322	+ header_remove('X-Accel-Buffering');
	1323	+ header('Content-Type: application/json');
	1324	+ }
	1325	+
	1326	+ wp_send_json($response_data);
	1327	+ wp_die();
	1328	+ }
	1329	+ }
	1330	+
	1331	+ // If we get here, no intent matched OR the intent didn't provide a usable response
	1332	+
	1333	+ // Step 4: Generate AI response
	1334	+ $conversation_history = $this->mxchat_fetch_conversation_history_for_ai($session_id);
	1335	+ $this->mxchat_increment_chat_count();
	1336	+
	1337	+ // Generate embedding for the user's query - USE BOT-SPECIFIC API KEY
	1338	+ $api_key = $current_options['api_key'] ?? $this->options['api_key'];
	1339	+ $user_message_embedding = $this->mxchat_generate_embedding($message, $api_key);
	1340	+
	1341	+ // Check if the embedding generation returned an error
	1342	+ if (is_array($user_message_embedding) && isset($user_message_embedding['error'])) {
	1343	+ $error_message = $user_message_embedding['error'];
	1344	+ $error_code = $user_message_embedding['error_code'] ?? 'embedding_error';
	1345	+
	1346	+ // FIXED: Send error in appropriate format based on streaming mode
	1347	+ if ($is_streaming) {
	1348	+ echo "data: " . json_encode([
	1349	+ 'error' => true,
	1350	+ 'error_message' => $error_message,
	1351	+ 'error_code' => $error_code,
	1352	+ 'text' => $error_message,
	1353	+ 'message' => $error_message
	1354	+ ]) . "\n\n";
	1355	+ echo "data: [DONE]\n\n";
	1356	+ flush();
	1357	+ } else {
	1358	+ wp_send_json_error([
	1359	+ 'error_message' => $error_message,
	1360	+ 'error_code' => $error_code
	1361	+ ]);
	1362	+ }
	1363	+ wp_die();
	1364	+ }
	1365	+
	1366	+ // Check if the embedding is valid
	1367	+ if (!is_array($user_message_embedding) || empty($user_message_embedding)) {
	1368	+ $error_message = esc_html__('Unable to process your message. The embedding service is not responding correctly.', 'mxchat');
	1369	+
	1370	+ // FIXED: Send error in appropriate format based on streaming mode
	1371	+ if ($is_streaming) {
	1372	+ echo "data: " . json_encode([
	1373	+ 'error' => true,
	1374	+ 'error_message' => $error_message,
	1375	+ 'error_code' => 'invalid_embedding',
	1376	+ 'text' => $error_message,
	1377	+ 'message' => $error_message
	1378	+ ]) . "\n\n";
	1379	+ echo "data: [DONE]\n\n";
	1380	+ flush();
	1381	+ } else {
	1382	+ wp_send_json_error([
	1383	+ 'error_message' => $error_message,
	1384	+ 'error_code' => 'invalid_embedding'
	1385	+ ]);
	1386	+ }
	1387	+ wp_die();
	1388	+ }
	1389	+
	1390	+ // Build context with both knowledge base and PDF content if available
	1391	+ $context_content = "User asked: '{$message}'\n\n";
	1392	+
	1393	+ // Add action instruction if present (add this right after the above line)
	1394	+ if (!empty($this->current_action_instruction)) {
	1395	+ $context_content .= "===== SPECIAL INSTRUCTION =====\n";
	1396	+ $context_content .= "IMPORTANT: " . $this->current_action_instruction . "\n";
	1397	+ $context_content .= "Respond naturally and conversationally while following this instruction.\n";
	1398	+ $context_content .= "===== END SPECIAL INSTRUCTION =====\n\n";
	1399	+
	1400	+ // Clear the instruction after using it
	1401	+ $this->current_action_instruction = null;
	1402	+ }
	1403	+
	1404	+
	1405	+ // Add page context if available and contextual awareness is enabled using current_options
	1406	+ if ($page_context && isset($current_options['contextual_awareness_toggle']) && $current_options['contextual_awareness_toggle'] === 'on') {
	1407	+ $context_content .= "===== CURRENT PAGE CONTEXT =====\n";
	1408	+ $context_content .= "Page URL: " . $page_context['url'] . "\n";
	1409	+ $context_content .= "Page Title: " . $page_context['title'] . "\n";
	1410	+ $context_content .= "Page Content: " . $page_context['content'] . "\n";
	1411	+ $context_content .= "===== END CURRENT PAGE CONTEXT =====\n\n";
	1412	+ }
	1413	+
	1414	+ // Get relevant content from knowledge base - PASS BOT_ID
	1415	+ $relevant_content = $this->mxchat_find_relevant_content($user_message_embedding, $bot_id);
	1416	+
	1417	+ // NEW: Also extract URLs from system instructions
	1418	+ $system_instructions = $this->get_system_instructions($bot_id);
	1419	+ if (!empty($system_instructions)) {
	1420	+ preg_match_all(
	1421	+ '#\bhttps?://[^\s<>"\']+#i',
	1422	+ $system_instructions,
	1423	+ $system_instruction_urls
	1424	+ );
	1425	+
	1426	+ if (!empty($system_instruction_urls[0])) {
	1427	+ // Merge with existing valid URLs
	1428	+ $this->current_valid_urls = array_merge(
	1429	+ $this->current_valid_urls,
	1430	+ $system_instruction_urls[0]
	1431	+ );
	1432	+ // Remove duplicates
	1433	+ $this->current_valid_urls = array_unique($this->current_valid_urls);
	1434	+
	1435	+ error_log("Added " . count($system_instruction_urls[0]) . " URLs from system instructions");
	1436	+ }
	1437	+ }
	1438	+
	1439	+// ===== CAPTURE REAL SIMILARITY DATA FOR ADMINS =====
	1440	+if ($testing_data !== null && $this->last_similarity_analysis !== null) {
	1441	+ // Update testing data with the REAL similarity analysis
	1442	+ $testing_data['top_matches'] = $this->last_similarity_analysis['top_matches'];
	1443	+ $testing_data['total_documents_checked'] = $this->last_similarity_analysis['total_checked'] ?? 0;
	1444	+ $testing_data['knowledge_base_type'] = $this->last_similarity_analysis['knowledge_base_type'];
	1445	+}
	1446	+// ===== END SIMILARITY DATA CAPTURE =====
	1447	+
	1448	+// NEW: Add valid URLs to testing data for admin panel display (AFTER similarity data)
	1449	+if ($testing_data !== null && !empty($this->current_valid_urls)) {
	1450	+ $testing_data['approved_urls'] = array_values($this->current_valid_urls);
	1451	+ error_log("Added " . count($this->current_valid_urls) . " approved URLs to testing data");
	1452	+}
	1453	+
	1454	+ if (!empty($relevant_content)) {
	1455	+ $context_content .= "===== OFFICIAL KNOWLEDGE DATABASE CONTENT =====\n" . $relevant_content . "\n===== END OF OFFICIAL KNOWLEDGE DATABASE CONTENT =====\n\n";
	1456	+ } else {
	1457	+ $context_content .= "===== NO RELEVANT CONTENT FOUND IN KNOWLEDGE DATABASE =====\n";
	1458	+ }
	1459	+
	1460	+ // NEW: Add approved URLs list to context for AI
	1461	+ if (!empty($this->current_valid_urls)) {
	1462	+ $context_content .= "===== APPROVED URLS FOR CITATIONS =====\n";
	1463	+ $context_content .= "You may ONLY use these exact URLs in your response:\n";
	1464	+ foreach ($this->current_valid_urls as $url) {
	1465	+ $context_content .= "- " . $url . "\n";
	1466	+ }
	1467	+ $context_content .= "\nCRITICAL: Do NOT create, modify, extend, or invent any other URLs. ";
	1468	+ $context_content .= "===== END APPROVED URLS =====\n\n";
	1469	+ }
	1470	+
	1471	+ // Check for and include PDF content
	1472	+ $pdf_url = get_transient('mxchat_pdf_url_' . $session_id);
	1473	+ $pdf_embeddings = get_transient('mxchat_pdf_embeddings_' . $session_id);
	1474	+ $pdf_filename = get_transient('mxchat_pdf_filename_' . $session_id);
	1475	+ if ($pdf_url && $pdf_embeddings && get_transient('mxchat_include_pdf_in_context_' . $session_id)) {
	1476	+ $relevant_pdf_pages = $this->find_relevant_pdf_pages($user_message_embedding, $pdf_embeddings);
	1477	+ if (!empty($relevant_pdf_pages)) {
	1478	+ $context_content .= "Relevant content from PDF document '{$pdf_filename}':\n";
	1479	+ foreach ($relevant_pdf_pages as $page_data) {
	1480	+ $context_content .= "Page {$page_data['page_number']} of '{$pdf_filename}': {$page_data['text']}\n";
	1481	+ }
	1482	+ $context_content .= "\n";
	1483	+ }
	1484	+ }
	1485	+
	1486	+ // Check for and include Word content
	1487	+ $word_url = get_transient('mxchat_word_url_' . $session_id);
	1488	+ $word_embeddings = get_transient('mxchat_word_embeddings_' . $session_id);
	1489	+ $word_filename = get_transient('mxchat_word_filename_' . $session_id);
	1490	+ if ($word_url && $word_embeddings && get_transient('mxchat_include_word_in_context_' . $session_id)) {
	1491	+ $relevant_word_chunks = $this->word_handler->mxchat_find_relevant_word_chunks($user_message_embedding, $word_embeddings);
	1492	+ if (!empty($relevant_word_chunks)) {
	1493	+ $context_content .= "Relevant content from Word document '{$word_filename}':\n";
	1494	+ foreach ($relevant_word_chunks as $chunk_data) {
	1495	+ $context_content .= "Section {$chunk_data['chunk_number']} of '{$word_filename}': {$chunk_data['text']}\n";
	1496	+ }
	1497	+ $context_content .= "\n";
	1498	+ }
	1499	+ }
	1500	+
	1501	+ $context_content = apply_filters('mxchat_prepare_context', $context_content, $session_id);
	1502	+
	1503	+ // Extract model from current options for bot-specific model support
	1504	+ $selected_model = isset($current_options['model']) ? $current_options['model'] : 'gpt-4o';
	1505	+
	1506	+ $response = $this->mxchat_generate_response(
	1507	+ $context_content,
	1508	+ $current_options['api_key'] ?? $this->options['api_key'],
	1509	+ $current_options['xai_api_key'] ?? $this->options['xai_api_key'],
	1510	+ $current_options['claude_api_key'] ?? $this->options['claude_api_key'],
	1511	+ $current_options['deepseek_api_key'] ?? $this->options['deepseek_api_key'],
	1512	+ $current_options['gemini_api_key'] ?? $this->options['gemini_api_key'],
	1513	+ $current_options['openrouter_api_key'] ?? $this->options['openrouter_api_key'],
	1514	+ $conversation_history,
	1515	+ $is_streaming,
	1516	+ $session_id,
	1517	+ $testing_data,
	1518	+ $selected_model
	1519	+ );
	1520	+
	1521	+ // Handle streaming vs non-streaming responses
	1522	+ if ($is_streaming) {
	1523	+ // Check if streaming actually happened or if it fell back to regular response
	1524	+ if ($response === true) {
	1525	+ wp_die();
	1526	+ }
	1527	+ // If we get here, streaming fell back to regular response, continue
	1528	+ // But if there's an error, we need to send it as SSE format since headers are already set
	1529	+ if (is_array($response) && isset($response['error'])) {
	1530	+ $error_message = $response['error'];
	1531	+ $error_code = $response['error_code'] ?? 'api_error';
	1532	+ // Send error in SSE format that the client JS can handle
	1533	+ echo "data: " . json_encode([
	1534	+ 'error' => true,
	1535	+ 'error_message' => $error_message,
	1536	+ 'error_code' => $error_code,
	1537	+ 'text' => $error_message, // Also include as text for fallback handling
	1538	+ 'message' => $error_message
	1539	+ ]) . "\n\n";
	1540	+ echo "data: [DONE]\n\n";
	1541	+ flush();
	1542	+ wp_die();
	1543	+ }
	1544	+ }
	1545	+
	1546	+ // Check if the response is an error array (non-streaming mode)
	1547	+ if (is_array($response) && isset($response['error'])) {
	1548	+ wp_send_json_error([
	1549	+ 'error_message' => $response['error'],
	1550	+ 'error_code' => $response['error_code'] ?? 'api_error'
	1551	+ ]);
	1552	+ wp_die();
	1553	+ }
	1554	+
	1555	+ // DEBUG: Check what we have
	1556	+ error_log("=== BEFORE URL VALIDATION ===");
	1557	+ error_log("current_valid_urls is empty? " . (empty($this->current_valid_urls) ? 'YES' : 'NO'));
	1558	+ error_log("current_valid_urls count: " . count($this->current_valid_urls));
	1559	+ error_log("current_valid_urls content: " . print_r($this->current_valid_urls, true));
	1560	+
	1561	+ // If we get here, the response is valid text - now validate URLs
	1562	+ if (!empty($this->current_valid_urls)) {
	1563	+ error_log("CALLING validate_and_clean_urls");
	1564	+ $response = $this->validate_and_clean_urls($response, $this->current_valid_urls);
	1565	+ } else {
	1566	+ error_log("SKIPPING validation - current_valid_urls is empty");
	1567	+ }
	1568	+ // ===== END URL VALIDATION =====
	1569	+
	1570	+ // Save the cleaned response
	1571	+ $this->mxchat_save_chat_message($session_id, 'bot', $response);
	1572	+
	1573	+ // Step 5: Save additional content if available
	1574	+ if (!empty($this->productCardHtml)) {
	1575	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->productCardHtml);
	1576	+ }
	1577	+
	1578	+ if (!empty($this->fallbackResponse['html'])) {
	1579	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['html']);
	1580	+ }
	1581	+
	1582	+ // Step 6: Return the response
	1583	+ $response_data = [
	1584	+ 'text' => $response,
	1585	+ 'html' => !empty($this->productCardHtml) ? $this->productCardHtml : ($this->fallbackResponse['html'] ?? ''),
	1586	+ 'session_id' => $session_id
	1587	+ ];
	1588	+
	1589	+ // Always add testing data for admins (no toggle needed)
	1590	+ if ($testing_data !== null) {
	1591	+ $response_data['testing_data'] = $testing_data;
	1592	+ }
	1593	+
	1594	+ wp_send_json($response_data);
	1595	+ wp_die();
	1596	+}
	1597	+
	1598	+/**
	1599	+ * Get bot-specific options for multi-bot functionality
	1600	+ * Falls back to default options if bot_id is 'default' or multi-bot add-on is not active
	1601	+ */
	1602	+// Also debug the bot options retrieval
	1603	+private function get_bot_options($bot_id = 'default') {
	1604	+ error_log("MXCHAT DEBUG: get_bot_options called for bot: " . $bot_id);
	1605	+
	1606	+ if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) {
	1607	+ error_log("MXCHAT DEBUG: Using default options (no multi-bot or bot is 'default')");
	1608	+ return array();
	1609	+ }
	1610	+
	1611	+ $bot_options = apply_filters('mxchat_get_bot_options', array(), $bot_id);
	1612	+
	1613	+ if (!empty($bot_options)) {
	1614	+ error_log("MXCHAT DEBUG: Got bot-specific options from filter");
	1615	+ if (isset($bot_options['similarity_threshold'])) {
	1616	+ error_log(" - similarity_threshold: " . $bot_options['similarity_threshold']);
	1617	+ }
	1618	+ }
	1619	+
	1620	+ return is_array($bot_options) ? $bot_options : array();
	1621	+}
	1622	+
	1623	+/**
	1624	+ * Get bot-specific Pinecone configuration
	1625	+ * Used in the knowledge retrieval functions
	1626	+ */
	1627	+// Also add debugging to your get_bot_pinecone_config function
	1628	+private function get_bot_pinecone_config($bot_id = 'default') {
	1629	+ error_log("MXCHAT DEBUG: get_bot_pinecone_config called for bot: " . $bot_id);
	1630	+
	1631	+ // If default bot or multi-bot add-on not active, use default Pinecone config
	1632	+ if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) {
	1633	+ error_log("MXCHAT DEBUG: Using default Pinecone config (no multi-bot or bot is 'default')");
	1634	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	1635	+ $config = array(
	1636	+ 'use_pinecone' => (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1'),
	1637	+ 'api_key' => $addon_options['mxchat_pinecone_api_key'] ?? '',
	1638	+ 'host' => $addon_options['mxchat_pinecone_host'] ?? '',
	1639	+ 'namespace' => $addon_options['mxchat_pinecone_namespace'] ?? ''
	1640	+ );
	1641	+ error_log("MXCHAT DEBUG: Default config - use_pinecone: " . ($config['use_pinecone'] ? 'true' : 'false'));
	1642	+ return $config;
	1643	+ }
	1644	+
	1645	+ error_log("MXCHAT DEBUG: Calling filter 'mxchat_get_bot_pinecone_config' for bot: " . $bot_id);
	1646	+
	1647	+ // Hook for multi-bot add-on to provide bot-specific Pinecone config
	1648	+ $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id);
	1649	+
	1650	+ if (!empty($bot_pinecone_config)) {
	1651	+ error_log("MXCHAT DEBUG: Got bot-specific config from filter");
	1652	+ error_log(" - use_pinecone: " . (isset($bot_pinecone_config['use_pinecone']) ? ($bot_pinecone_config['use_pinecone'] ? 'true' : 'false') : 'not set'));
	1653	+ error_log(" - host: " . ($bot_pinecone_config['host'] ?? 'not set'));
	1654	+ error_log(" - namespace: " . ($bot_pinecone_config['namespace'] ?? 'not set'));
	1655	+ } else {
	1656	+ error_log("MXCHAT DEBUG: Filter returned empty config!");
	1657	+ }
	1658	+
	1659	+ return is_array($bot_pinecone_config) ? $bot_pinecone_config : array();
	1660	+}
	1661	+
	1662	+
	1663	+// Updated function to check intents and invoke the callback function
	1664	+private function mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id) {
	1665	+ global $wpdb;
	1666	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	1667	+
	1668	+ // Get the current bot_id
	1669	+ $current_bot_id = $this->get_current_bot_id($session_id);
	1670	+
	1671	+ // Generate the user embedding
	1672	+ $user_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
	1673	+
	1674	+ // Check if embedding generation returned an error
	1675	+ if (is_array($user_embedding) && isset($user_embedding['error'])) {
	1676	+ $error_message = $user_embedding['error'];
	1677	+ $error_code = $user_embedding['error_code'] ?? 'embedding_error';
	1678	+
	1679	+ // FIXED: Send error in appropriate format based on streaming mode
	1680	+ if ($this->is_streaming) {
	1681	+ echo "data: " . json_encode([
	1682	+ 'error' => true,
	1683	+ 'error_message' => $error_message,
	1684	+ 'error_code' => $error_code,
	1685	+ 'text' => $error_message,
	1686	+ 'message' => $error_message
	1687	+ ]) . "\n\n";
	1688	+ echo "data: [DONE]\n\n";
	1689	+ flush();
	1690	+ } else {
	1691	+ wp_send_json_error([
	1692	+ 'error_message' => $error_message,
	1693	+ 'error_code' => $error_code
	1694	+ ]);
	1695	+ }
	1696	+ wp_die();
	1697	+ }
	1698	+
	1699	+ // Check if embedding is valid
	1700	+ if (!is_array($user_embedding) || empty($user_embedding)) {
	1701	+ $error_message = esc_html__('Unable to process your message. The embedding service is not responding correctly.', 'mxchat');
	1702	+
	1703	+ // FIXED: Send error in appropriate format based on streaming mode
	1704	+ if ($this->is_streaming) {
	1705	+ echo "data: " . json_encode([
	1706	+ 'error' => true,
	1707	+ 'error_message' => $error_message,
	1708	+ 'error_code' => 'invalid_embedding',
	1709	+ 'text' => $error_message,
	1710	+ 'message' => $error_message
	1711	+ ]) . "\n\n";
	1712	+ echo "data: [DONE]\n\n";
	1713	+ flush();
	1714	+ } else {
	1715	+ wp_send_json_error([
	1716	+ 'error_message' => $error_message,
	1717	+ 'error_code' => 'invalid_embedding'
	1718	+ ]);
	1719	+ }
	1720	+ wp_die();
	1721	+ }
	1722	+
	1723	+ // Fetch intents from the database
	1724	+ $table_name = $wpdb->prefix . 'mxchat_intents';
	1725	+ if ($chat_mode === 'agent') {
	1726	+ $query = $wpdb->prepare(
	1727	+ "SELECT * FROM $table_name WHERE callback_function = %s AND (enabled = 1 OR enabled IS NULL)",
	1728	+ 'mxchat_handle_switch_to_chatbot_intent'
	1729	+ );
	1730	+ $intents = $wpdb->get_results($query);
	1731	+ } else {
	1732	+ $intents = $wpdb->get_results("SELECT * FROM $table_name WHERE enabled = 1 OR enabled IS NULL");
	1733	+ }
	1734	+
	1735	+ if (empty($intents)) {
	1736	+ return false;
	1737	+ }
	1738	+
	1739	+ $highest_similarity = -INF;
	1740	+ $matched_intent = null;
	1741	+
	1742	+ // Array to store action analysis for testing panel
	1743	+ $action_analysis = [];
	1744	+
	1745	+ foreach ($intents as $intent) {
	1746	+ // Additional check for enabled state
	1747	+ $is_enabled = isset($intent->enabled) ? (bool)$intent->enabled : true;
	1748	+ if (!$is_enabled) {
	1749	+ continue;
	1750	+ }
	1751	+
	1752	+ // Check if this action is enabled for the current bot
	1753	+ if (!$this->is_action_enabled_for_bot($intent, $current_bot_id)) {
	1754	+ continue;
	1755	+ }
	1756	+
	1757	+ $intent_embedding_serialized = $intent->embedding_vector;
	1758	+ $intent_embedding = $intent_embedding_serialized
	1759	+ ? unserialize($intent_embedding_serialized, ['allowed_classes' => false])
	1760	+ : null;
	1761	+
	1762	+ if (!is_array($intent_embedding)) {
	1763	+ continue;
	1764	+ }
	1765	+
	1766	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $intent_embedding);
	1767	+ $intent_threshold = isset($intent->similarity_threshold) ? $intent->similarity_threshold : 0.85;
	1768	+
	1769	+ // Store action analysis data for testing panel
	1770	+ $action_analysis[] = [
	1771	+ 'intent_label' => $intent->intent_label,
	1772	+ 'callback_function' => $intent->callback_function,
	1773	+ 'similarity' => round($similarity, 4),
	1774	+ 'similarity_percentage' => round($similarity * 100, 2),
	1775	+ 'threshold' => $intent_threshold,
	1776	+ 'threshold_percentage' => round($intent_threshold * 100, 2),
	1777	+ 'above_threshold' => $similarity >= $intent_threshold,
	1778	+ 'triggered' => false // Will be updated below if this intent is triggered
	1779	+ ];
	1780	+
	1781	+ if ($similarity >= $intent_threshold && $similarity > $highest_similarity) {
	1782	+ $highest_similarity = $similarity;
	1783	+ $matched_intent = $intent;
	1784	+ }
	1785	+ }
	1786	+
	1787	+ // Mark the triggered action if any
	1788	+ if ($matched_intent) {
	1789	+ foreach ($action_analysis as &$action) {
	1790	+ if ($action['intent_label'] === $matched_intent->intent_label) {
	1791	+ $action['triggered'] = true;
	1792	+ break;
	1793	+ }
	1794	+ }
	1795	+ }
	1796	+
	1797	+ // Sort actions by similarity (highest first) and store for testing panel
	1798	+ usort($action_analysis, function($a, $b) {
	1799	+ return $b['similarity'] <=> $a['similarity'];
	1800	+ });
	1801	+
	1802	+ // Store action analysis for testing panel capture
	1803	+ $this->last_action_analysis = $action_analysis;
	1804	+
	1805	+ // Around line 715 in your mxchat_check_intent_and_invoke_callback function
	1806	+ if ($matched_intent) {
	1807	+ // If the callback is a method on this instance (core callback), call it directly
	1808	+ if (method_exists($this, $matched_intent->callback_function)) {
	1809	+ $callback_result = call_user_func(
	1810	+ [$this, $matched_intent->callback_function],
	1811	+ $message,
	1812	+ $user_id,
	1813	+ $session_id,
	1814	+ $matched_intent,
	1815	+ $user_context ?? null
	1816	+ );
	1817	+ } else {
	1818	+ // Otherwise, use apply_filters for add-on callbacks
	1819	+ $callback_result = apply_filters(
	1820	+ $matched_intent->callback_function,
	1821	+ false,
	1822	+ $message,
	1823	+ $user_id,
	1824	+ $session_id,
	1825	+ $matched_intent
	1826	+ );
	1827	+ }
	1828	+
	1829	+ // Handle the callback result properly
	1830	+ if ($callback_result !== false) {
	1831	+ // If callback returned an array with chat_mode, use it directly
	1832	+ if (is_array($callback_result) && isset($callback_result['chat_mode'])) {
	1833	+ $this->fallbackResponse = $callback_result;
	1834	+ return $callback_result; // Return the full array
	1835	+ } else {
	1836	+ $this->fallbackResponse = $callback_result;
	1837	+ return true;
	1838	+ }
	1839	+ }
	1840	+ }
	1841	+
	1842	+ return false;
	1843	+}
	1844	+
	1845	+/**
	1846	+ * Check if an action is enabled for a specific bot
	1847	+ */
	1848	+private function is_action_enabled_for_bot($intent, $bot_id) {
	1849	+ // If enabled_bots column doesn't exist or is null, assume it's enabled for all bots (backward compatibility)
	1850	+ if (!isset($intent->enabled_bots) || empty($intent->enabled_bots)) {
	1851	+ return true;
	1852	+ }
	1853	+
	1854	+ $enabled_bots = json_decode($intent->enabled_bots, true);
	1855	+
	1856	+ // If JSON decode fails or returns empty array, assume enabled for all (backward compatibility)
	1857	+ if (!is_array($enabled_bots) || empty($enabled_bots)) {
	1858	+ return true;
	1859	+ }
	1860	+
	1861	+ // Check if the current bot is in the enabled bots list
	1862	+ return in_array($bot_id, $enabled_bots);
	1863	+}
	1864	+
	1865	+// Helper function to clear PDF and Word document related transients
	1866	+private function clear_pdf_transients($session_id) {
	1867	+ // PDF transients
	1868	+ delete_transient('mxchat_pdf_url_' . $session_id);
	1869	+ delete_transient('mxchat_pdf_embeddings_' . $session_id);
	1870	+ delete_transient('mxchat_include_pdf_in_context_' . $session_id);
	1871	+ delete_transient('mxchat_waiting_for_pdf_url_' . $session_id);
	1872	+
	1873	+ // Word document transients
	1874	+ delete_transient('mxchat_word_url_' . $session_id);
	1875	+ delete_transient('mxchat_word_filename_' . $session_id);
	1876	+ delete_transient('mxchat_word_embeddings_' . $session_id);
	1877	+ delete_transient('mxchat_include_word_in_context_' . $session_id);
	1878	+ delete_transient('mxchat_waiting_for_word_' . $session_id);
	1879	+}
	1880	+
	1881	+
	1882	+
	1883	+//verified good
	1884	+public function mxchat_handle_email_capture($message, $user_id, $session_id) {
	1885	+ // Get the user's original instruction/message
	1886	+ $user_instruction = esc_html($this->options['triggered_phrase_response'] ?? esc_html__("Please provide your email address.", 'mxchat'));
	1887	+
	1888	+ // Set instruction for AI - just pass along what the user wanted to say
	1889	+ $this->current_action_instruction = $user_instruction;
	1890	+
	1891	+ // Set the transient to track email capture flow
	1892	+ set_transient('mxchat_email_capture_' . $user_id, true, 5 * MINUTE_IN_SECONDS);
	1893	+
	1894	+ // Return false to let the AI generate the response
	1895	+ return false;
	1896	+}
	1897	+
	1898	+public function mxchat_generate_image($message, $user_id, $session_id) {
	1899	+ //error_log("Starting image generation for message: " . $message);
	1900	+
	1901	+ // Prepare a prompt for DALL-E
	1902	+ $prompt = esc_html__('Create an image of ', 'mxchat') . sanitize_text_field($message);
	1903	+
	1904	+ // Use the existing OpenAI API key
	1905	+ $openai_api_key = sanitize_text_field($this->options['api_key']);
	1906	+
	1907	+ // Call DALL-E to generate an image
	1908	+ $image_response = $this->mxchat_generate_dalle_image($prompt, $openai_api_key);
	1909	+
	1910	+ // Check if the response contains an image URL
	1911	+ if (isset($image_response['imageUrl'])) {
	1912	+ $image_url = esc_url_raw($image_response['imageUrl']);
	1913	+
	1914	+ // Construct the HTML with a CSS class instead of inline styles
	1915	+ $response_html = '<img src="' . esc_url($image_url) . '" alt="' . esc_attr__('Generated Image', 'mxchat') . '" class="mxchat-generated-image" />';
	1916	+ $response_text = esc_html__('Here is the image I generated:', 'mxchat');
	1917	+
	1918	+ // Save the bot message with both text and HTML
	1919	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	1920	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_html);
	1921	+
	1922	+ // Set the fallback response for the chat handler
	1923	+ $this->fallbackResponse = [
	1924	+ 'text' => $response_text,
	1925	+ 'html' => $response_html,
	1926	+ 'images' => [$image_url]
	1927	+ ];
	1928	+
	1929	+ // For debugging/verification - Use json_encode to verify what's being set
	1930	+ //error_log("Image generation successful - fallbackResponse set: " . json_encode($this->fallbackResponse));
	1931	+
	1932	+ // Return the response directly instead of relying on the property
	1933	+ return $this->fallbackResponse;
	1934	+ } else {
	1935	+ $response_text = esc_html__("I'm sorry, but I couldn't generate an image based on your request.", 'mxchat');
	1936	+
	1937	+ // Save the error message
	1938	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	1939	+
	1940	+ // Set the fallback response for the chat handler
	1941	+ $this->fallbackResponse = [
	1942	+ 'text' => $response_text,
	1943	+ 'html' => '',
	1944	+ 'images' => []
	1945	+ ];
	1946	+
	1947	+ //error_log("DALL-E image generation error: " . esc_html($image_response['error'] ?? 'Unknown error.'));
	1948	+ //error_log("Error fallbackResponse set: " . json_encode($this->fallbackResponse));
	1949	+
	1950	+ // Return the response directly instead of relying on the property
	1951	+ return $this->fallbackResponse;
	1952	+ }
	1953	+}
	1954	+private function mxchat_generate_dalle_image($prompt, $api_key, $model = 'dall-e-3', $timeout = 60) {
	1955	+ $api_url = 'https://api.openai.com/v1/images/generations';
	1956	+ $body = json_encode([
	1957	+ 'prompt' => sanitize_text_field($prompt),
	1958	+ 'n' => 1,
	1959	+ 'size' => '1024x1024',
	1960	+ 'model' => sanitize_text_field($model),
	1961	+ ]);
	1962	+
	1963	+ $args = [
	1964	+ 'body' => $body,
	1965	+ 'headers' => [
	1966	+ 'Content-Type' => 'application/json',
	1967	+ 'Authorization' => 'Bearer ' . sanitize_text_field($api_key),
	1968	+ ],
	1969	+ 'method' => 'POST',
	1970	+ 'timeout' => absint($timeout),
	1971	+ ];
	1972	+
	1973	+ $response = wp_remote_post($api_url, $args);
	1974	+
	1975	+ if (is_wp_error($response)) {
	1976	+ //error_log("DALL-E request failed: " . $response->get_error_message());
	1977	+ return ['error' => esc_html__('Error generating image: ', 'mxchat') . $response->get_error_message()];
	1978	+ }
	1979	+
	1980	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	1981	+
	1982	+ if (isset($response_body['data'][0]['url'])) {
	1983	+ return ['imageUrl' => esc_url_raw($response_body['data'][0]['url'])];
	1984	+ } else {
	1985	+ //error_log("DALL-E response error: " . wp_remote_retrieve_body($response));
	1986	+ return ['error' => esc_html__('Failed to generate image.', 'mxchat')];
	1987	+ }
	1988	+}
	1989	+
	1990	+/**
	1991	+ * Handle web search requests.
	1992	+ *
	1993	+ * Sends the refined search query to the Brave Search API and uses the
	1994	+ * results to generate a conversational response with the AI model.
	1995	+ *
	1996	+ * @since 1.0.0
	1997	+ * @param string $message The user's search query.
	1998	+ * @param string $user_id The user identifier.
	1999	+ * @param string $session_id The current session ID.
	2000	+ * @return array Response array containing text with embedded HTML links
	2001	+ */
	2002	+public function mxchat_handle_search_request($message, $user_id, $session_id) {
	2003	+ // Step 1: Interpret and refine the search query
	2004	+ $refined_search_query = $this->mxchat_interpret_search_query($message);
	2005	+ if (empty($refined_search_query)) {
	2006	+ return array(
	2007	+ 'text' => esc_html__('I apologize, but could you please rephrase your search request?', 'mxchat'),
	2008	+ 'html' => ''
	2009	+ );
	2010	+ }
	2011	+
	2012	+ // Retrieve and validate API settings
	2013	+ $options = get_option('mxchat_options');
	2014	+ $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
	2015	+ $results_count = isset($options['brave_results_count']) ? absint($options['brave_results_count']) : 5;
	2016	+
	2017	+ if (empty($api_key)) {
	2018	+ return array(
	2019	+ 'text' => esc_html__('Search functionality is temporarily unavailable. Please try again later.', 'mxchat'),
	2020	+ 'html' => ''
	2021	+ );
	2022	+ }
	2023	+
	2024	+ // Build the API request URL
	2025	+ $api_url = add_query_arg(
	2026	+ array(
	2027	+ 'q' => rawurlencode($refined_search_query),
	2028	+ 'count' => $results_count,
	2029	+ 'text_decorations' => 'true',
	2030	+ 'rich_data' => 'true',
	2031	+ ),
	2032	+ 'https://api.search.brave.com/res/v1/web/search'
	2033	+ );
	2034	+
	2035	+ // Attempt to retrieve cached results first
	2036	+ $transient_key = 'mxchat_search_' . md5($refined_search_query);
	2037	+ $results = get_transient($transient_key);
	2038	+
	2039	+ if (false === $results) {
	2040	+ // SECURITY FIX: Changed to wp_safe_remote_get
	2041	+ $response = wp_safe_remote_get(
	2042	+ $api_url,
	2043	+ array(
	2044	+ 'headers' => array(
	2045	+ 'Accept' => 'application/json',
	2046	+ 'Accept-Encoding' => 'gzip',
	2047	+ 'X-Subscription-Token'=> $api_key,
	2048	+ ),
	2049	+ 'timeout' => 10,
	2050	+ )
	2051	+ );
	2052	+
	2053	+ if (is_wp_error($response)) {
	2054	+ return array(
	2055	+ 'text' => esc_html__('I encountered an error while searching. Please try again.', 'mxchat'),
	2056	+ 'html' => ''
	2057	+ );
	2058	+ }
	2059	+
	2060	+ $results = json_decode(wp_remote_retrieve_body($response), true);
	2061	+
	2062	+ if (json_last_error() !== JSON_ERROR_NONE) {
	2063	+ return array(
	2064	+ 'text' => esc_html__('I received an invalid response from the search service.', 'mxchat'),
	2065	+ 'html' => ''
	2066	+ );
	2067	+ }
	2068	+
	2069	+ // Cache results for one hour
	2070	+ set_transient($transient_key, $results, HOUR_IN_SECONDS);
	2071	+ }
	2072	+
	2073	+ // Process results
	2074	+ if (!empty($results['web']['results']) && is_array($results['web']['results'])) {
	2075	+ // Create a more straightforward summary with HTML links
	2076	+ $search_results_text = '';
	2077	+
	2078	+ // Add a simple intro
	2079	+ $search_results_text .= sprintf(
	2080	+ esc_html__("Here's what I found about '%s':", 'mxchat'),
	2081	+ esc_html($refined_search_query)
	2082	+ );
	2083	+
	2084	+ // Add the top results with HTML links
	2085	+ foreach (array_slice($results['web']['results'], 0, 5) as $result) {
	2086	+ $title = isset($result['title']) ? wp_strip_all_tags($result['title']) : '';
	2087	+ $url = isset($result['url']) ? esc_url($result['url']) : '';
	2088	+ $description = isset($result['description']) ? wp_strip_all_tags($result['description']) : '';
	2089	+
	2090	+ // Add a line break after the intro
	2091	+ $search_results_text .= '<br><br>';
	2092	+
	2093	+ // Add title as a link
	2094	+ $search_results_text .= sprintf(
	2095	+ '<a href="%s" target="_blank" rel="noopener noreferrer">%s</a><br>',
	2096	+ $url,
	2097	+ $title
	2098	+ );
	2099	+
	2100	+ // Add a condensed description
	2101	+ $search_results_text .= sprintf("%s", $description);
	2102	+ }
	2103	+
	2104	+ // Save to chat history
	2105	+ $this->mxchat_save_chat_message($session_id, 'bot', $search_results_text);
	2106	+
	2107	+ // Return the formatted text with embedded HTML links
	2108	+ return array(
	2109	+ 'text' => $search_results_text,
	2110	+ 'html' => ''
	2111	+ );
	2112	+ } else {
	2113	+ return array(
	2114	+ 'text' => sprintf(
	2115	+ esc_html__('I searched for "%s" but couldn\'t find any relevant results. Would you like to try different search terms?', 'mxchat'),
	2116	+ esc_html($refined_search_query)
	2117	+ ),
	2118	+ 'html' => ''
	2119	+ );
	2120	+ }
	2121	+}
	2122	+
	2123	+//very good
	2124	+/**
	2125	+ * Handle image search requests from the chatbot
	2126	+ *
	2127	+ * @param string $message The user's search query
	2128	+ * @param int $user_id The user's ID
	2129	+ * @param string $session_id The chat session ID
	2130	+ * @return array Response array with text and HTML content
	2131	+ */
	2132	+public function mxchat_handle_image_search_request($message, $user_id, $session_id) {
	2133	+ // Step 1: Interpret the search query using the user's selected AI model
	2134	+ $refined_search_query = $this->mxchat_interpret_search_query($message);
	2135	+
	2136	+ // If no query was interpreted, return a fallback message
	2137	+ if (empty($refined_search_query)) {
	2138	+ return array(
	2139	+ 'text' => __("I'm sorry, I couldn't interpret your search query. Please specify what you'd like to see images of.", 'mxchat'),
	2140	+ 'html' => "",
	2141	+ );
	2142	+ }
	2143	+
	2144	+ // Brave API URL
	2145	+ $api_url = 'https://api.search.brave.com/res/v1/images/search';
	2146	+
	2147	+ // Retrieve Brave API settings
	2148	+ $options = get_option('mxchat_options');
	2149	+ $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
	2150	+
	2151	+ if (empty($api_key)) {
	2152	+ return array(
	2153	+ 'text' => __("API key is not configured. Please set it in the Brave Search Settings.", 'mxchat'),
	2154	+ 'html' => "",
	2155	+ );
	2156	+ }
	2157	+
	2158	+ $image_count = isset($options['brave_image_count']) ? intval($options['brave_image_count']) : 4;
	2159	+ $safe_search = isset($options['brave_safe_search']) ? sanitize_text_field($options['brave_safe_search']) : 'strict';
	2160	+
	2161	+ // Append query parameters based on settings
	2162	+ $api_url = add_query_arg([
	2163	+ 'q' => rawurlencode($refined_search_query),
	2164	+ 'count' => $image_count,
	2165	+ 'safesearch' => $safe_search,
	2166	+ ], $api_url);
	2167	+
	2168	+ // Implement caching
	2169	+ $transient_key = 'mxchat_image_search_' . md5($refined_search_query);
	2170	+ $body = get_transient($transient_key);
	2171	+
	2172	+ if (false === $body) {
	2173	+ $args = [
	2174	+ 'headers' => [
	2175	+ 'Accept' => 'application/json',
	2176	+ 'Accept-Encoding' => 'gzip',
	2177	+ 'X-Subscription-Token' => $api_key,
	2178	+ ],
	2179	+ 'timeout' => 10,
	2180	+ ];
	2181	+
	2182	+ // SECURITY FIX: Changed to wp_safe_remote_get
	2183	+ $response = wp_safe_remote_get($api_url, $args);
	2184	+
	2185	+ if (is_wp_error($response)) {
	2186	+ return array(
	2187	+ 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
	2188	+ 'html' => "",
	2189	+ );
	2190	+ }
	2191	+
	2192	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2193	+ set_transient($transient_key, $body, HOUR_IN_SECONDS);
	2194	+ }
	2195	+
	2196	+ // Process the API response
	2197	+ if (isset($body['results']) && is_array($body['results']) && count($body['results']) > 0) {
	2198	+ $html_output = '<div class="mxchat-image-gallery">';
	2199	+
	2200	+ // Get the configured image count (1-6)
	2201	+ $display_count = isset($options['brave_image_count']) ? intval($options['brave_image_count']) : 4;
	2202	+ $display_count = min($display_count, count($body['results'])); // Make sure we don't exceed available images
	2203	+
	2204	+ // Use only the requested number of images
	2205	+ for ($i = 0; $i < $display_count; $i++) {
	2206	+ $image = $body['results'][$i];
	2207	+ $image_url = isset($image['url']) ? esc_url($image['url']) : '';
	2208	+ $thumbnail_url = isset($image['thumbnail']['src']) ? esc_url($image['thumbnail']['src']) : '';
	2209	+ $title = isset($image['title']) ? esc_html($image['title']) : esc_html__('Image', 'mxchat');
	2210	+
	2211	+ if ($image_url && $thumbnail_url) {
	2212	+ $html_output .= '<div class="mxchat-image-item">';
	2213	+ $html_output .= '<strong class="mxchat-image-title">' . $title . '</strong>';
	2214	+ $html_output .= '<a href="' . $image_url . '" target="_blank" rel="noopener noreferrer" class="mxchat-image-link">';
	2215	+ $html_output .= '<img src="' . $thumbnail_url . '" alt="' . $title . '" class="mxchat-image-thumbnail">';
	2216	+ $html_output .= '</a></div>';
	2217	+ }
	2218	+ }
	2219	+
	2220	+ $html_output .= '</div>';
	2221	+
	2222	+ // Create response text
	2223	+ $response_text = sprintf(__("Here are some images of %s:", 'mxchat'), $refined_search_query);
	2224	+
	2225	+ // Save both response text and HTML to chat history
	2226	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	2227	+ $this->mxchat_save_chat_message($session_id, 'bot', $html_output);
	2228	+
	2229	+ // Return the combined response
	2230	+ return array(
	2231	+ 'text' => $response_text,
	2232	+ 'html' => $html_output,
	2233	+ );
	2234	+ } else {
	2235	+ $response_text = __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat');
	2236	+
	2237	+ // Save the error message to chat history
	2238	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	2239	+
	2240	+ return array(
	2241	+ 'text' => $response_text,
	2242	+ 'html' => "",
	2243	+ );
	2244	+ }
	2245	+}
	2246	+
	2247	+/**
	2248	+ * Interpret the search query using the user's selected AI model
	2249	+ *
	2250	+ * @param string $user_query The original query from the user
	2251	+ * @return string The refined search query
	2252	+ */
	2253	+public function mxchat_interpret_search_query($user_query) {
	2254	+ $system_prompt = esc_html__("Interpret the user's request to provide only the essential keywords or phrases for image searching. Remove conversational language, politeness, or extra context. Return a concise search query that doesn't lose any of the original meaning.", 'mxchat');
	2255	+
	2256	+ // Get options and determine the selected model
	2257	+ $options = $this->options ?? get_option('mxchat_options');
	2258	+ $selected_model = isset($options['model']) ? $options['model'] : 'gpt-4o';
	2259	+
	2260	+ // Extract model prefix to determine the provider
	2261	+ $model_parts = explode('-', $selected_model);
	2262	+ $provider = strtolower($model_parts[0]);
	2263	+
	2264	+ // Determine which API key to use based on the provider
	2265	+ switch ($provider) {
	2266	+ case 'gemini':
	2267	+ $api_key = isset($options['gemini_api_key']) ? sanitize_text_field($options['gemini_api_key']) : '';
	2268	+ if (empty($api_key)) {
	2269	+ return sanitize_text_field($user_query); // Default to original query if API key missing
	2270	+ }
	2271	+ return $this->interpret_query_with_gemini($user_query, $system_prompt, $api_key, $selected_model);
	2272	+
	2273	+ case 'claude':
	2274	+ $api_key = isset($options['claude_api_key']) ? sanitize_text_field($options['claude_api_key']) : '';
	2275	+ if (empty($api_key)) {
	2276	+ return sanitize_text_field($user_query);
	2277	+ }
	2278	+ return $this->interpret_query_with_claude($user_query, $system_prompt, $api_key, $selected_model);
	2279	+
	2280	+ case 'grok':
	2281	+ $api_key = isset($options['xai_api_key']) ? sanitize_text_field($options['xai_api_key']) : '';
	2282	+ if (empty($api_key)) {
	2283	+ return sanitize_text_field($user_query);
	2284	+ }
	2285	+ return $this->interpret_query_with_xai($user_query, $system_prompt, $api_key, $selected_model);
	2286	+
	2287	+ case 'deepseek':
	2288	+ $api_key = isset($options['deepseek_api_key']) ? sanitize_text_field($options['deepseek_api_key']) : '';
	2289	+ if (empty($api_key)) {
	2290	+ return sanitize_text_field($user_query);
	2291	+ }
	2292	+ return $this->interpret_query_with_deepseek($user_query, $system_prompt, $api_key, $selected_model);
	2293	+
	2294	+ case 'gpt':
	2295	+ default:
	2296	+ // Default to OpenAI for custom models or unrecognized prefixes
	2297	+ $api_key = isset($options['api_key']) ? sanitize_text_field($options['api_key']) : '';
	2298	+ if (empty($api_key)) {
	2299	+ return sanitize_text_field($user_query);
	2300	+ }
	2301	+ return $this->interpret_query_with_openai($user_query, $system_prompt, $api_key, $selected_model);
	2302	+ }
	2303	+}
	2304	+
	2305	+/**
	2306	+ * Interpret query using OpenAI models
	2307	+ */
	2308	+private function interpret_query_with_openai($user_query, $system_prompt, $api_key, $model = 'gpt-4o') {
	2309	+ $url = 'https://api.openai.com/v1/chat/completions';
	2310	+ $args = [
	2311	+ 'headers' => [
	2312	+ 'Authorization' => 'Bearer ' . $api_key,
	2313	+ 'Content-Type' => 'application/json',
	2314	+ ],
	2315	+ 'body' => wp_json_encode([
	2316	+ 'model' => $model,
	2317	+ 'messages' => [
	2318	+ ['role' => 'system', 'content' => $system_prompt],
	2319	+ ['role' => 'user', 'content' => sanitize_text_field($user_query)],
	2320	+ ],
	2321	+ 'temperature' => 0.2,
	2322	+ 'max_tokens' => 20,
	2323	+ ]),
	2324	+ 'method' => 'POST',
	2325	+ 'timeout' => 15,
	2326	+ ];
	2327	+
	2328	+ $response = wp_remote_post($url, $args);
	2329	+ if (is_wp_error($response)) {
	2330	+ return sanitize_text_field($user_query);
	2331	+ }
	2332	+
	2333	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2334	+ return isset($body['choices'][0]['message']['content'])
	2335	+ ? sanitize_text_field(trim($body['choices'][0]['message']['content']))
	2336	+ : sanitize_text_field($user_query);
	2337	+}
	2338	+
	2339	+/**
	2340	+ * Interpret query using Claude models
	2341	+ */
	2342	+private function interpret_query_with_claude($user_query, $system_prompt, $api_key, $model) {
	2343	+ $url = 'https://api.anthropic.com/v1/messages';
	2344	+
	2345	+ $args = [
	2346	+ 'headers' => [
	2347	+ 'Content-Type' => 'application/json',
	2348	+ 'x-api-key' => $api_key,
	2349	+ 'anthropic-version' => '2023-06-01',
	2350	+ ],
	2351	+ 'body' => wp_json_encode([
	2352	+ 'model' => $model,
	2353	+ 'system' => $system_prompt,
	2354	+ 'messages' => [
	2355	+ ['role' => 'user', 'content' => sanitize_text_field($user_query)]
	2356	+ ],
	2357	+ 'max_tokens' => 20,
	2358	+ 'temperature' => 0.2,
	2359	+ ]),
	2360	+ 'method' => 'POST',
	2361	+ 'timeout' => 15,
	2362	+ ];
	2363	+
	2364	+ $response = wp_remote_post($url, $args);
	2365	+ if (is_wp_error($response)) {
	2366	+ return sanitize_text_field($user_query);
	2367	+ }
	2368	+
	2369	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2370	+ if (!empty($body['content'][0]['text'])) {
	2371	+ return sanitize_text_field(trim($body['content'][0]['text']));
	2372	+ }
	2373	+
	2374	+ return sanitize_text_field($user_query);
	2375	+}
	2376	+
	2377	+/**
	2378	+ * Interpret query using Gemini models
	2379	+ */
	2380	+private function interpret_query_with_gemini($user_query, $system_prompt, $api_key, $model) {
	2381	+ // Strip "gemini-" prefix for the API
	2382	+ $model_version = str_replace('gemini-', '', $model);
	2383	+
	2384	+ $url = "https://generativelanguage.googleapis.com/v1/models/$model_version:generateContent?key=" . urlencode($api_key);
	2385	+
	2386	+ $args = [
	2387	+ 'headers' => [
	2388	+ 'Content-Type' => 'application/json',
	2389	+ ],
	2390	+ 'body' => wp_json_encode([
	2391	+ 'contents' => [
	2392	+ [
	2393	+ 'role' => 'user',
	2394	+ 'parts' => [
	2395	+ ['text' => $system_prompt . "\n\nQuery: " . sanitize_text_field($user_query)]
	2396	+ ]
	2397	+ ]
	2398	+ ],
	2399	+ 'generationConfig' => [
	2400	+ 'temperature' => 0.2,
	2401	+ 'maxOutputTokens' => 20,
	2402	+ ],
	2403	+ ]),
	2404	+ 'method' => 'POST',
	2405	+ 'timeout' => 15,
	2406	+ ];
	2407	+
	2408	+ $response = wp_remote_post($url, $args);
	2409	+ if (is_wp_error($response)) {
	2410	+ return sanitize_text_field($user_query);
	2411	+ }
	2412	+
	2413	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2414	+ if (!empty($body['candidates'][0]['content']['parts'][0]['text'])) {
	2415	+ return sanitize_text_field(trim($body['candidates'][0]['content']['parts'][0]['text']));
	2416	+ }
	2417	+
	2418	+ return sanitize_text_field($user_query);
	2419	+}
	2420	+
	2421	+/**
	2422	+ * Interpret query using X.AI (Grok) models
	2423	+ */
	2424	+private function interpret_query_with_xai($user_query, $system_prompt, $api_key, $model) {
	2425	+ $url = 'https://api.xai.com/v1/chat/completions';
	2426	+
	2427	+ $args = [
	2428	+ 'headers' => [
	2429	+ 'Content-Type' => 'application/json',
	2430	+ 'Authorization' => 'Bearer ' . $api_key,
	2431	+ ],
	2432	+ 'body' => wp_json_encode([
	2433	+ 'model' => $model,
	2434	+ 'messages' => [
	2435	+ ['role' => 'system', 'content' => $system_prompt],
	2436	+ ['role' => 'user', 'content' => sanitize_text_field($user_query)],
	2437	+ ],
	2438	+ 'temperature' => 0.2,
	2439	+ 'max_tokens' => 20,
	2440	+ ]),
	2441	+ 'method' => 'POST',
	2442	+ 'timeout' => 15,
	2443	+ ];
	2444	+
	2445	+ $response = wp_remote_post($url, $args);
	2446	+ if (is_wp_error($response)) {
	2447	+ return sanitize_text_field($user_query);
	2448	+ }
	2449	+
	2450	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2451	+ if (isset($body['choices'][0]['message']['content'])) {
	2452	+ return sanitize_text_field(trim($body['choices'][0]['message']['content']));
	2453	+ }
	2454	+
	2455	+ return sanitize_text_field($user_query);
	2456	+}
	2457	+
	2458	+/**
	2459	+ * Interpret query using DeepSeek models
	2460	+ */
	2461	+private function interpret_query_with_deepseek($user_query, $system_prompt, $api_key, $model) {
	2462	+ $url = 'https://api.deepseek.com/v1/chat/completions';
	2463	+
	2464	+ $args = [
	2465	+ 'headers' => [
	2466	+ 'Content-Type' => 'application/json',
	2467	+ 'Authorization' => 'Bearer ' . $api_key,
	2468	+ ],
	2469	+ 'body' => wp_json_encode([
	2470	+ 'model' => $model,
	2471	+ 'messages' => [
	2472	+ ['role' => 'system', 'content' => $system_prompt],
	2473	+ ['role' => 'user', 'content' => sanitize_text_field($user_query)],
	2474	+ ],
	2475	+ 'temperature' => 0.2,
	2476	+ 'max_tokens' => 20,
	2477	+ ]),
	2478	+ 'method' => 'POST',
	2479	+ 'timeout' => 15,
	2480	+ ];
	2481	+
	2482	+ $response = wp_remote_post($url, $args);
	2483	+ if (is_wp_error($response)) {
	2484	+ return sanitize_text_field($user_query);
	2485	+ }
	2486	+
	2487	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	2488	+ if (isset($body['choices'][0]['message']['content'])) {
	2489	+ return sanitize_text_field(trim($body['choices'][0]['message']['content']));
	2490	+ }
	2491	+
	2492	+ return sanitize_text_field($user_query);
	2493	+}
	2494	+
	2495	+//very good
	2496	+private function add_email_to_loops($email) {
	2497	+ // Sanitize the email
	2498	+ $email = sanitize_email($email);
	2499	+
	2500	+ // Retrieve and sanitize options
	2501	+ $api_key = isset($this->options['loops_api_key']) ? sanitize_text_field($this->options['loops_api_key']) : '';
	2502	+ $mailing_list_id = isset($this->options['loops_mailing_list']) ? sanitize_text_field($this->options['loops_mailing_list']) : '';
	2503	+
	2504	+ // Check for missing API key or mailing list ID
	2505	+ if (empty($api_key) || empty($mailing_list_id)) {
	2506	+ //error_log(esc_html__('Loops API key or mailing list ID is missing.', 'mxchat'));
	2507	+ return;
	2508	+ }
	2509	+
	2510	+ $data = array(
	2511	+ 'email' => $email,
	2512	+ 'subscribed' => true,
	2513	+ 'source' => __('MxChat AI Chatbot', 'mxchat'),
	2514	+ 'mailingLists' => array($mailing_list_id => true),
	2515	+ );
	2516	+
	2517	+ $url = 'https://app.loops.so/api/v1/contacts/create';
	2518	+ $args = array(
	2519	+ 'body' => wp_json_encode($data),
	2520	+ 'headers' => array(
	2521	+ 'Authorization' => 'Bearer ' . $api_key,
	2522	+ 'Content-Type' => 'application/json',
	2523	+ ),
	2524	+ 'method' => 'POST',
	2525	+ 'timeout' => 45,
	2526	+ );
	2527	+
	2528	+ $response = wp_remote_post($url, $args);
	2529	+
	2530	+ // Handle errors in the API request
	2531	+ if (is_wp_error($response)) {
	2532	+ //error_log(esc_html__('Error adding email to Loops: ', 'mxchat') . $response->get_error_message());
	2533	+ return;
	2534	+ }
	2535	+
	2536	+ // Check for non-200 HTTP responses
	2537	+ $response_code = wp_remote_retrieve_response_code($response);
	2538	+ if ($response_code != 200) {
	2539	+ $response_body = wp_remote_retrieve_body($response);
	2540	+ //error_log(esc_html__('Loops API responded with code ', 'mxchat') . $response_code . ': ' . $response_body);
	2541	+ }
	2542	+}
	2543	+
	2544	+public function mxchat_handle_pdf_discussion($message, $user_id, $session_id) {
	2545	+ // Get the maximum number of pages allowed from admin settings
	2546	+ $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
	2547	+
	2548	+ // Retrieve options for dynamic texts
	2549	+ $trigger_text = $this->options['pdf_intent_trigger_text'] ?? __("Please provide the URL to the PDF you'd like to discuss.", 'mxchat');
	2550	+ $success_text = $this->options['pdf_intent_success_text'] ?? __("I've processed the PDF. What questions do you have about it?", 'mxchat');
	2551	+ $error_text = $this->options['pdf_intent_error_text'] ?? __("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
	2552	+
	2553	+ // Check for explicit request for new PDF
	2554	+ $new_pdf_requested = stripos($message, 'new') !== false ||
	2555	+ stripos($message, 'another') !== false ||
	2556	+ stripos($message, 'different') !== false;
	2557	+
	2558	+ // If user mentions adding/reading a PDF, set waiting flag
	2559	+ if (stripos($message, 'pdf') !== false ||
	2560	+ stripos($message, 'document') !== false ||
	2561	+ stripos($message, 'read') !== false) {
	2562	+ set_transient('mxchat_waiting_for_pdf_url_' . $session_id, true, HOUR_IN_SECONDS);
	2563	+ $this->fallbackResponse['text'] = $trigger_text;
	2564	+ return;
	2565	+ }
	2566	+
	2567	+ // If we're waiting for a URL or user requested new PDF
	2568	+ if ($new_pdf_requested || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
	2569	+ if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
	2570	+ // Process URL... (rest of your existing URL processing code)
	2571	+ } else {
	2572	+ $this->fallbackResponse['text'] = $trigger_text;
	2573	+ }
	2574	+ return;
	2575	+ }
	2576	+
	2577	+ // Default to proceeding with conversation if no specific PDF action is needed
	2578	+ $this->fallbackResponse['text'] = '';
	2579	+}
	2580	+
	2581	+
	2582	+/**
	2583	+ * Enhanced fetch_and_split_pdf_pages with SSRF protection
	2584	+ */
	2585	+private function fetch_and_split_pdf_pages($pdf_source, $max_pages) {
	2586	+ // CLEAR DEBUG LOGGING
	2587	+ //error_log("=== MXCHAT PDF PROCESSING START ===");
	2588	+ //error_log("PDF Source: " . $pdf_source);
	2589	+ //error_log("Max Pages: " . $max_pages);
	2590	+ //error_log("Session ID: " . ($this->session_id ?? 'not set'));
	2591	+
	2592	+ // Check if Advanced Claude Toolbar is available and enabled
	2593	+ $claude_available = function_exists('mxchatACT_is_advanced_claude_enabled');
	2594	+ $claude_enabled = $claude_available ? mxchatACT_is_advanced_claude_enabled() : false;
	2595	+
	2596	+ //error_log("Claude Function Available: " . ($claude_available ? 'YES' : 'NO'));
	2597	+ //error_log("Claude Enabled: " . ($claude_enabled ? 'YES' : 'NO'));
	2598	+
	2599	+ if ($claude_available && $claude_enabled) {
	2600	+ //error_log("🚀 ATTEMPTING CLAUDE PROCESSING...");
	2601	+
	2602	+ // Attempt Claude processing first
	2603	+ $claude_result = apply_filters('mxchat_process_pdf_advanced', false, $pdf_source, $max_pages, $this->session_id);
	2604	+
	2605	+ if ($claude_result !== false && is_array($claude_result) && !empty($claude_result)) {
	2606	+ //error_log("✅ CLAUDE PROCESSING SUCCESSFUL!");
	2607	+ //error_log("Claude returned " . count($claude_result) . " processed pages");
	2608	+
	2609	+ // Log first page details for verification
	2610	+ if (isset($claude_result[0])) {
	2611	+ $first_page = $claude_result[0];
	2612	+ //error_log("First page enhanced: " . (isset($first_page['enhanced']) && $first_page['enhanced'] ? 'YES' : 'NO'));
	2613	+ //error_log("Processing method: " . ($first_page['processing_method'] ?? 'not set'));
	2614	+ //error_log("First page text preview: " . substr($first_page['text'] ?? '', 0, 100) . "...");
	2615	+ }
	2616	+
	2617	+ //error_log("=== MXCHAT PDF PROCESSING END (CLAUDE) ===");
	2618	+ return $claude_result;
	2619	+ } else {
	2620	+ //error_log("❌ CLAUDE PROCESSING FAILED or returned invalid result");
	2621	+ //error_log("Claude result type: " . gettype($claude_result));
	2622	+ if (is_array($claude_result)) {
	2623	+ //error_log("Claude result count: " . count($claude_result));
	2624	+ }
	2625	+ }
	2626	+ }
	2627	+
	2628	+ // Fallback to basic processing
	2629	+ //error_log("🔄 FALLING BACK TO BASIC PDF PROCESSING...");
	2630	+
	2631	+ $upload_dir = wp_upload_dir();
	2632	+ $temp_file = null;
	2633	+
	2634	+ try {
	2635	+ // Your existing basic processing code here...
	2636	+ // (I'll include the key parts with debug logging)
	2637	+
	2638	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
	2639	+ //error_log("Downloading PDF from URL...");
	2640	+
	2641	+ // SECURITY FIX: Validate URL before processing
	2642	+ if (!$this->mxchat_is_safe_pdf_url($pdf_source)) {
	2643	+ //error_log("❌ SECURITY: Blocked unsafe PDF URL");
	2644	+ return false;
	2645	+ }
	2646	+
	2647	+ $temp_file = wp_tempnam($pdf_source);
	2648	+
	2649	+ // SECURITY FIX: Changed from wp_remote_get to wp_safe_remote_get
	2650	+ $response = wp_safe_remote_get($pdf_source, [
	2651	+ 'timeout' => 60,
	2652	+ 'headers' => ['User-Agent' => 'MxChat PDF Processor']
	2653	+ ]);
	2654	+
	2655	+ if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
	2656	+ $error_message = is_wp_error($response) ? $response->get_error_message() : 'HTTP ' . wp_remote_retrieve_response_code($response);
	2657	+ //error_log("❌ BASIC PROCESSING: Failed to download PDF: " . $error_message);
	2658	+ return false;
	2659	+ }
	2660	+
	2661	+ file_put_contents($temp_file, wp_remote_retrieve_body($response));
	2662	+ //error_log("✅ PDF downloaded successfully");
	2663	+ } else {
	2664	+ $temp_file = $pdf_source;
	2665	+ //error_log("Using local PDF file: " . $temp_file);
	2666	+ }
	2667	+
	2668	+ // Parse PDF
	2669	+ //error_log("Parsing PDF with basic parser...");
	2670	+ $parser = new \Smalot\PdfParser\Parser();
	2671	+ $pdf = $parser->parseFile($temp_file);
	2672	+ $pages = $pdf->getPages();
	2673	+
	2674	+ //error_log("PDF contains " . count($pages) . " pages");
	2675	+
	2676	+ if (count($pages) > $max_pages) {
	2677	+ //error_log("❌ BASIC PROCESSING: Too many pages (" . count($pages) . " > " . $max_pages . ")");
	2678	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file) {
	2679	+ unlink($temp_file);
	2680	+ }
	2681	+ return 'too_many_pages';
	2682	+ }
	2683	+
	2684	+ $embeddings = [];
	2685	+ $processed_pages = 0;
	2686	+
	2687	+ foreach ($pages as $page_number => $page) {
	2688	+ $text = $page->getText();
	2689	+
	2690	+ if (empty(trim($text))) {
	2691	+ //error_log("Skipping empty page: " . ($page_number + 1));
	2692	+ continue;
	2693	+ }
	2694	+
	2695	+ $text = $this->mxchat_clean_text($text);
	2696	+
	2697	+ $embedding = $this->mxchat_generate_embedding(
	2698	+ __("Page ", 'mxchat') . ($page_number + 1) . ": " . $text,
	2699	+ $this->options['api_key']
	2700	+ );
	2701	+
	2702	+ if ($embedding) {
	2703	+ $embeddings[] = [
	2704	+ 'page_number' => $page_number + 1,
	2705	+ 'embedding' => $embedding,
	2706	+ 'text' => $text,
	2707	+ 'enhanced' => false, // CLEARLY MARK AS BASIC
	2708	+ 'processing_method' => 'basic_pdf_parser'
	2709	+ ];
	2710	+ $processed_pages++;
	2711	+ }
	2712	+ }
	2713	+
	2714	+ //error_log("✅ BASIC PROCESSING COMPLETE: " . $processed_pages . " pages processed");
	2715	+
	2716	+ // Cleanup
	2717	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file && file_exists($temp_file)) {
	2718	+ unlink($temp_file);
	2719	+ }
	2720	+
	2721	+ //error_log("=== MXCHAT PDF PROCESSING END (BASIC) ===");
	2722	+ return $embeddings;
	2723	+
	2724	+ } catch (\Exception $e) {
	2725	+ //error_log("❌ BASIC PROCESSING ERROR: " . $e->getMessage());
	2726	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file && file_exists($temp_file)) {
	2727	+ unlink($temp_file);
	2728	+ }
	2729	+ //error_log("=== MXCHAT PDF PROCESSING END (ERROR) ===");
	2730	+ return false;
	2731	+ }
	2732	+}
	2733	+
	2734	+
	2735	+/**
	2736	+ * Validate PDF URL for security
	2737	+ * Prevents SSRF attacks by blocking dangerous URLs
	2738	+ */
	2739	+
	2740	+private function mxchat_is_safe_pdf_url($url) {
	2741	+ // Use WordPress core function for comprehensive validation
	2742	+ // This blocks localhost, private IPs, and reserved IP ranges
	2743	+ $validated_url = wp_http_validate_url($url);
	2744	+
	2745	+ if ($validated_url === false) {
	2746	+ return false;
	2747	+ }
	2748	+
	2749	+ // Additional check: only allow HTTP/HTTPS schemes
	2750	+ $parsed = parse_url($url);
	2751	+ if (!isset($parsed['scheme']) || !in_array($parsed['scheme'], ['http', 'https'], true)) {
	2752	+ return false;
	2753	+ }
	2754	+
	2755	+ return true;
	2756	+}
	2757	+
	2758	+
	2759	+private function mxchat_clean_text($text) {
	2760	+ // Remove excessive whitespace
	2761	+ $text = preg_replace('/\s+/', ' ', $text);
	2762	+
	2763	+ // Remove control characters except newlines and tabs
	2764	+ $text = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/', '', $text);
	2765	+
	2766	+ // Normalize line endings
	2767	+ $text = str_replace(["\r\n", "\r"], "\n", $text);
	2768	+
	2769	+ // Trim whitespace
	2770	+ $text = trim($text);
	2771	+
	2772	+ return $text;
	2773	+}
	2774	+
	2775	+private function find_relevant_pdf_pages($query_embedding, $embeddings) {
	2776	+ //error_log(esc_html__("find_relevant_pdf_pages called.", 'mxchat'));
	2777	+
	2778	+ $most_relevant = null;
	2779	+ $highest_similarity = -INF;
	2780	+
	2781	+ foreach ($embeddings as $page_data) {
	2782	+ $similarity = $this->mxchat_calculate_cosine_similarity($query_embedding, $page_data['embedding']);
	2783	+
	2784	+ if ($similarity > $highest_similarity) {
	2785	+ $highest_similarity = $similarity;
	2786	+ $most_relevant = $page_data['page_number'];
	2787	+ }
	2788	+ }
	2789	+
	2790	+ if (!is_null($most_relevant)) {
	2791	+ $page_numbers = range(max(1, $most_relevant - 1), min(count($embeddings), $most_relevant + 1));
	2792	+ return array_filter($embeddings, function ($page) use ($page_numbers) {
	2793	+ return in_array($page['page_number'], $page_numbers);
	2794	+ });
	2795	+ }
	2796	+
	2797	+ return [];
	2798	+}
	2799	+
	2800	+
	2801	+public function handle_pdf_upload() {
	2802	+ check_ajax_referer('mxchat_chat_nonce', 'nonce');
	2803	+
	2804	+ if (!isset($_FILES['pdf_file']) || !isset($_POST['session_id'])) {
	2805	+ wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat'));
	2806	+ return;
	2807	+ }
	2808	+
	2809	+ // SECURITY FIX: Check if PDF uploads are enabled in settings
	2810	+ $options = get_option('mxchat_options', array());
	2811	+ $show_pdf_button = isset($options['show_pdf_upload_button']) ? $options['show_pdf_upload_button'] : 'on';
	2812	+
	2813	+ if ($show_pdf_button !== 'on') {
	2814	+ wp_send_json_error(esc_html__('PDF uploads are currently disabled.', 'mxchat'));
	2815	+ return;
	2816	+ }
	2817	+
	2818	+ $file = $_FILES['pdf_file'];
	2819	+ $session_id = sanitize_text_field($_POST['session_id']);
	2820	+ $original_filename = sanitize_text_field($file['name']);
	2821	+
	2822	+ // SECURITY FIX: Verify session ownership before allowing upload
	2823	+ $current_user_identifier = MxChat_User::mxchat_get_user_identifier();
	2824	+ $session_owner = get_option("mxchat_session_owner_{$session_id}");
	2825	+
	2826	+ if ($session_owner && $session_owner !== $current_user_identifier) {
	2827	+ wp_send_json_error(esc_html__('Unauthorized access.', 'mxchat'));
	2828	+ return;
	2829	+ }
	2830	+
	2831	+ $file_type = wp_check_filetype($file['name'], ['pdf' => 'application/pdf']);
	2832	+ if ($file_type['type'] !== 'application/pdf') {
	2833	+ wp_send_json_error(esc_html__('Invalid file type. Only PDF files are allowed.', 'mxchat'));
	2834	+ return;
	2835	+ }
	2836	+
	2837	+ $upload_dir = wp_upload_dir();
	2838	+
	2839	+ // SECURITY FIX: Generate random filename without exposing session_id
	2840	+ $random_string = wp_generate_password(20, false, false); // 20 char alphanumeric string
	2841	+ $pdf_filename = 'mxchat_' . $random_string . '_' . time() . '.pdf';
	2842	+ $pdf_path = $upload_dir['path'] . '/' . $pdf_filename;
	2843	+
	2844	+ if (!move_uploaded_file($file['tmp_name'], $pdf_path)) {
	2845	+ wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat'));
	2846	+ return;
	2847	+ }
	2848	+
	2849	+ $this->clear_pdf_transients($session_id);
	2850	+
	2851	+ $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
	2852	+ $embeddings = $this->fetch_and_split_pdf_pages($pdf_path, $max_pages);
	2853	+
	2854	+ if ($embeddings === 'too_many_pages') {
	2855	+ unlink($pdf_path);
	2856	+ $error_message = sprintf(
	2857	+ $this->options['pdf_intent_error_text'] ??
	2858	+ esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
	2859	+ $max_pages
	2860	+ );
	2861	+ wp_send_json_error($error_message);
	2862	+ return;
	2863	+ }
	2864	+
	2865	+ if ($embeddings === false || empty($embeddings)) {
	2866	+ unlink($pdf_path);
	2867	+ $error_message = $this->options['pdf_intent_error_text'] ??
	2868	+ esc_html__('The uploaded PDF appears to be empty or contains unsupported content.', 'mxchat');
	2869	+ wp_send_json_error($error_message);
	2870	+ return;
	2871	+ }
	2872	+
	2873	+ if (!empty($embeddings)) {
	2874	+ // Store the mapping between session and the random filename
	2875	+ set_transient('mxchat_pdf_url_' . $session_id, $pdf_path, HOUR_IN_SECONDS);
	2876	+ set_transient('mxchat_pdf_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS);
	2877	+ set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
	2878	+ set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
	2879	+
	2880	+ $success_message = $this->options['pdf_intent_success_text'] ??
	2881	+ esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat');
	2882	+
	2883	+ wp_send_json_success([
	2884	+ 'message' => $success_message,
	2885	+ 'filename' => $original_filename
	2886	+ ]);
	2887	+ return;
	2888	+ }
	2889	+
	2890	+ unlink($pdf_path);
	2891	+ $error_message = $this->options['pdf_intent_error_text'] ??
	2892	+ esc_html__('Sorry, I couldn\'t process the PDF. Please ensure it\'s a valid file.', 'mxchat');
	2893	+ wp_send_json_error($error_message);
	2894	+ return;
	2895	+}
	2896	+public function handle_pdf_remove() {
	2897	+ check_ajax_referer('mxchat_chat_nonce', 'nonce');
	2898	+
	2899	+ if (empty($_POST['session_id'])) {
	2900	+ wp_send_json_error(esc_html__('Session ID missing.', 'mxchat'));
	2901	+ wp_die();
	2902	+ }
	2903	+
	2904	+ $session_id = sanitize_text_field($_POST['session_id']);
	2905	+ $pdf_path = get_transient('mxchat_pdf_url_' . $session_id);
	2906	+
	2907	+ if ($pdf_path && file_exists($pdf_path)) {
	2908	+ unlink($pdf_path);
	2909	+ }
	2910	+
	2911	+ $this->clear_pdf_transients($session_id);
	2912	+
	2913	+ wp_send_json_success([
	2914	+ 'message' => esc_html__('PDF removed successfully.', 'mxchat')
	2915	+ ]);
	2916	+ wp_die();
	2917	+}
	2918	+
	2919	+
	2920	+function mxchat_fetch_new_messages() {
	2921	+ $session_id = sanitize_text_field($_POST['session_id']);
	2922	+ $last_seen_id = sanitize_text_field($_POST['last_seen_id']);
	2923	+ $persistence_enabled = $_POST['persistence_enabled'] === 'true';
	2924	+ $initial_timestamp = isset($_POST['initial_timestamp']) ? intval($_POST['initial_timestamp']) : 0;
	2925	+
	2926	+ if (empty($session_id)) {
	2927	+ //error_log(esc_html__('Fetch new messages error: Session ID missing.', 'mxchat'));
	2928	+ wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
	2929	+ wp_die();
	2930	+ }
	2931	+
	2932	+ $history = get_option("mxchat_history_{$session_id}", []);
	2933	+
	2934	+ error_log("MxChat WhatsApp DEBUG: Fetch new messages for session {$session_id}");
	2935	+ error_log("MxChat WhatsApp DEBUG: last_seen_id = " . var_export($last_seen_id, true));
	2936	+ error_log("MxChat WhatsApp DEBUG: History count = " . count($history));
	2937	+ error_log("MxChat WhatsApp DEBUG: Full history = " . print_r($history, true));
	2938	+
	2939	+ $new_messages = array_filter($history, function ($message) use ($last_seen_id, $persistence_enabled, $initial_timestamp) {
	2940	+ error_log("MxChat WhatsApp DEBUG: Checking message - ID: " . ($message['id'] ?? 'NO_ID') . ", Role: " . ($message['role'] ?? 'NO_ROLE'));
	2941	+
	2942	+ // If persistence is enabled, show all new messages
	2943	+ if ($persistence_enabled) {
	2944	+ $has_id = !empty($message['id']);
	2945	+ $is_agent = $message['role'] === 'agent';
	2946	+
	2947	+ // If last_seen_id is empty, 'NaN', or invalid, show all agent messages
	2948	+ if (empty($last_seen_id) || $last_seen_id === 'NaN' || $last_seen_id === 'undefined') {
	2949	+ $is_newer = true;
	2950	+ } else {
	2951	+ $is_newer = strcmp($message['id'] ?? '', $last_seen_id) > 0;
	2952	+ }
	2953	+
	2954	+ error_log("MxChat WhatsApp DEBUG: has_id={$has_id}, is_newer={$is_newer}, is_agent={$is_agent}");
	2955	+
	2956	+ return $has_id && $is_newer && $is_agent;
	2957	+ }
	2958	+
	2959	+ // If persistence is disabled, only show messages after initial timestamp
	2960	+ return !empty($message['id']) &&
	2961	+ $message['role'] === 'agent' &&
	2962	+ $message['timestamp'] > $initial_timestamp;
	2963	+ });
	2964	+
	2965	+ error_log("MxChat WhatsApp DEBUG: Filtered messages count = " . count($new_messages));
	2966	+
	2967	+ wp_send_json_success([
	2968	+ 'new_messages' => array_values($new_messages)
	2969	+ ]);
	2970	+ wp_die();
	2971	+}
	2972	+public function mxchat_live_agent_handover($message, $user_id, $session_id) {
	2973	+ // First check if live agents are available
	2974	+ $live_agent_available = $this->options['live_agent_status'] ?? 'off';
	2975	+ if ($live_agent_available !== 'on') {
	2976	+ $away_message = $this->options['live_agent_away_message'] ?? 'Sorry, live agents are currently unavailable. I can continue helping you as an AI assistant.';
	2977	+ $this->fallbackResponse = [
	2978	+ 'text' => $away_message,
	2979	+ 'html' => '',
	2980	+ 'images' => [],
	2981	+ 'chat_mode' => 'ai'
	2982	+ ];
	2983	+ wp_send_json([
	2984	+ 'text' => $away_message,
	2985	+ 'html' => '',
	2986	+ 'chat_mode' => 'ai',
	2987	+ 'session_id' => $session_id
	2988	+ ]);
	2989	+ wp_die();
	2990	+ }
	2991	+
	2992	+ $slack_bot_token = $this->options['live_agent_bot_token'] ?? '';
	2993	+
	2994	+ if (empty($slack_bot_token)) {
	2995	+ return false;
	2996	+ }
	2997	+
	2998	+ // Check if channel already exists for this session
	2999	+ $channel_id = get_option("mxchat_channel_{$session_id}", '');
	3000	+
	3001	+ if (empty($channel_id)) {
	3002	+ // Create new channel with session ID as name
	3003	+ $channel_name = $this->generate_channel_name($session_id);
	3004	+
	3005	+ //error_log("Attempting to create channel: $channel_name");
	3006	+
	3007	+ $response = wp_remote_post('https://slack.com/api/conversations.create', [
	3008	+ 'headers' => [
	3009	+ 'Content-Type' => 'application/json',
	3010	+ 'Authorization' => 'Bearer ' . $slack_bot_token
	3011	+ ],
	3012	+ 'body' => json_encode([
	3013	+ 'name' => $channel_name,
	3014	+ 'is_private' => false // Public channel - anyone in workspace can join
	3015	+ ])
	3016	+ ]);
	3017	+
	3018	+ if (!is_wp_error($response)) {
	3019	+ $response_body = wp_remote_retrieve_body($response);
	3020	+ $response_data = json_decode($response_body, true);
	3021	+
	3022	+ //error_log("Channel creation response: " . $response_body);
	3023	+
	3024	+ if (isset($response_data['ok']) && $response_data['ok']) {
	3025	+ $channel_id = $response_data['channel']['id'];
	3026	+ $actual_channel_name = $response_data['channel']['name'] ?? 'unknown';
	3027	+ //error_log("Channel created successfully: ID=$channel_id, Name=$actual_channel_name");
	3028	+ update_option("mxchat_channel_{$session_id}", $channel_id);
	3029	+
	3030	+ // Auto-invite agents to the channel
	3031	+ $agent_user_ids = $this->options['live_agent_user_ids'] ?? '';
	3032	+
	3033	+ if (!empty($agent_user_ids)) {
	3034	+ // Parse user IDs (one per line)
	3035	+ $user_ids = array_filter(array_map('trim', explode("\n", $agent_user_ids)));
	3036	+
	3037	+ foreach ($user_ids as $user_id_to_invite) {
	3038	+ //error_log("Inviting user to channel: $user_id_to_invite");
	3039	+
	3040	+ $invite_response = wp_remote_post('https://slack.com/api/conversations.invite', [
	3041	+ 'headers' => [
	3042	+ 'Content-Type' => 'application/json',
	3043	+ 'Authorization' => 'Bearer ' . $slack_bot_token
	3044	+ ],
	3045	+ 'body' => json_encode([
	3046	+ 'channel' => $channel_id,
	3047	+ 'users' => $user_id_to_invite
	3048	+ ])
	3049	+ ]);
	3050	+
	3051	+ if (!is_wp_error($invite_response)) {
	3052	+ $invite_body = wp_remote_retrieve_body($invite_response);
	3053	+ $invite_data = json_decode($invite_body, true);
	3054	+ //error_log("Invite response for $user_id_to_invite: " . $invite_body);
	3055	+
	3056	+ if (isset($invite_data['ok']) && $invite_data['ok']) {
	3057	+ //error_log("Successfully invited user $user_id_to_invite to channel");
	3058	+ } else {
	3059	+ //error_log("Failed to invite user $user_id_to_invite: " . ($invite_data['error'] ?? 'Unknown error'));
	3060	+ }
	3061	+ } else {
	3062	+ //error_log("WP Error inviting user $user_id_to_invite: " . $invite_response->get_error_message());
	3063	+ }
	3064	+ }
	3065	+ } else {
	3066	+ //error_log("No agent user IDs configured for auto-invite");
	3067	+ }
	3068	+ } else {
	3069	+ //error_log("Channel creation failed: " . ($response_data['error'] ?? 'Unknown error'));
	3070	+ }
	3071	+ } else {
	3072	+ //error_log("WP Error creating channel: " . $response->get_error_message());
	3073	+ }
	3074	+
	3075	+ if (empty($channel_id)) {
	3076	+ return false; // Failed to create channel
	3077	+ }
	3078	+ }
	3079	+
	3080	+ // Get recent chat history
	3081	+ $history = get_option("mxchat_history_{$session_id}", []);
	3082	+ $recent_history = array_slice($history, -5);
	3083	+
	3084	+ // Format conversation context
	3085	+ $conversation_context = "";
	3086	+ if (!empty($recent_history)) {
	3087	+ $conversation_context = "*Recent Conversation:*\n";
	3088	+ foreach ($recent_history as $hist_message) {
	3089	+ $role_display = $hist_message['role'] === 'user' ? 'User' : 'AI';
	3090	+ $conversation_context .= ">{$role_display}: {$hist_message['content']}\n";
	3091	+ }
	3092	+ $conversation_context .= "\n";
	3093	+ }
	3094	+
	3095	+ update_option("mxchat_mode_{$session_id}", 'agent');
	3096	+
	3097	+ // Send message to channel
	3098	+ $channel_message = "🔔 *New Live Agent Request*\n\n";
	3099	+ $channel_message .= "*Session ID:* `{$session_id}`\n";
	3100	+ $channel_message .= "*User ID:* `{$user_id}`\n\n";
	3101	+
	3102	+ if (!empty($conversation_context)) {
	3103	+ $channel_message .= $conversation_context;
	3104	+ }
	3105	+
	3106	+ $channel_message .= "*Current Message:*\n{$message}\n\n";
	3107	+ $channel_message .= "_Reply directly in this channel - all messages will go to the user_";
	3108	+
	3109	+ wp_remote_post('https://slack.com/api/chat.postMessage', [
	3110	+ 'headers' => [
	3111	+ 'Content-Type' => 'application/json',
	3112	+ 'Authorization' => 'Bearer ' . $slack_bot_token
	3113	+ ],
	3114	+ 'body' => json_encode([
	3115	+ 'channel' => $channel_id,
	3116	+ 'text' => $channel_message,
	3117	+ 'mrkdwn' => true
	3118	+ ])
	3119	+ ]);
	3120	+
	3121	+ $success_message = $this->options['live_agent_notification_message'] ?? 'Live agent has been notified.';
	3122	+ $this->mxchat_save_chat_message($session_id, 'bot', $success_message);
	3123	+
	3124	+ $this->fallbackResponse = [
	3125	+ 'text' => $success_message,
	3126	+ 'html' => '',
	3127	+ 'images' => [],
	3128	+ 'chat_mode' => 'agent'
	3129	+ ];
	3130	+
	3131	+ wp_send_json([
	3132	+ 'success' => true,
	3133	+ 'text' => $success_message,
	3134	+ 'html' => '',
	3135	+ 'chat_mode' => 'agent',
	3136	+ 'session_id' => $session_id,
	3137	+ 'fallbackResponse' => $this->fallbackResponse
	3138	+ ]);
	3139	+ wp_die();
	3140	+}
	3141	+
	3142	+private function generate_channel_name($session_id) {
	3143	+ $email = null;
	3144	+ $name = null;
	3145	+
	3146	+ // 1. First priority: Check if user is logged in and get their info
	3147	+ if (is_user_logged_in()) {
	3148	+ $current_user = wp_get_current_user();
	3149	+ if (!empty($current_user->user_email)) {
	3150	+ $email = $current_user->user_email;
	3151	+ //error_log("[DEBUG] Using logged-in user email for channel: {$email}");
	3152	+ }
	3153	+ if (!empty($current_user->display_name)) {
	3154	+ $name = $current_user->display_name;
	3155	+ //error_log("[DEBUG] Using logged-in user name for channel: {$name}");
	3156	+ }
	3157	+ }
	3158	+
	3159	+ // 2. Second priority: Check for saved email/name from "require email to chat" option
	3160	+ if (empty($email)) {
	3161	+ $email_option_key = "mxchat_email_{$session_id}";
	3162	+ $saved_email = get_option($email_option_key);
	3163	+ if (!empty($saved_email)) {
	3164	+ $email = $saved_email;
	3165	+ //error_log("[DEBUG] Using saved email from session for channel: {$email}");
	3166	+ }
	3167	+ }
	3168	+
	3169	+ if (empty($name)) {
	3170	+ $name_option_key = "mxchat_name_{$session_id}";
	3171	+ $saved_name = get_option($name_option_key);
	3172	+ if (!empty($saved_name)) {
	3173	+ $name = $saved_name;
	3174	+ //error_log("[DEBUG] Using saved name from session for channel: {$name}");
	3175	+ }
	3176	+ }
	3177	+
	3178	+ // 3. Third priority: Check existing chat transcript for email/name
	3179	+ if (empty($email) || empty($name)) {
	3180	+ global $wpdb;
	3181	+ $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
	3182	+ $existing_data = $wpdb->get_row($wpdb->prepare(
	3183	+ "SELECT user_email, user_name FROM $table_name WHERE session_id = %s AND (user_email IS NOT NULL OR user_name IS NOT NULL) LIMIT 1",
	3184	+ $session_id
	3185	+ ));
	3186	+
	3187	+ if ($existing_data) {
	3188	+ if (empty($email) && !empty($existing_data->user_email)) {
	3189	+ $email = $existing_data->user_email;
	3190	+ //error_log("[DEBUG] Using email from chat transcript for channel: {$email}");
	3191	+ }
	3192	+ if (empty($name) && !empty($existing_data->user_name)) {
	3193	+ $name = $existing_data->user_name;
	3194	+ //error_log("[DEBUG] Using name from chat transcript for channel: {$name}");
	3195	+ }
	3196	+ }
	3197	+ }
	3198	+
	3199	+ // 4. Generate channel name based on priority: Name > Email > Session ID
	3200	+ $channel_name = '';
	3201	+
	3202	+ if (!empty($name)) {
	3203	+ // Convert name to valid Slack channel name
	3204	+ $base_name = strtolower(trim($name));
	3205	+ // Replace spaces and invalid characters
	3206	+ $base_name = preg_replace('/[^a-z0-9\s]/', '', $base_name);
	3207	+ $base_name = preg_replace('/\s+/', '-', $base_name);
	3208	+ $base_name = trim($base_name, '-');
	3209	+
	3210	+ // Get last 4 characters of session ID for uniqueness
	3211	+ $session_suffix = substr($session_id, -4);
	3212	+ $channel_name = 'chat-' . $base_name . '-' . strtolower($session_suffix);
	3213	+
	3214	+ // Slack channel names have a 21 character limit
	3215	+ if (strlen($channel_name) > 21) {
	3216	+ // Calculate available space for name (21 - 'chat-' - '-' - session_suffix)
	3217	+ $available_space = 21 - 5 - 1 - strlen($session_suffix); // 'chat-' = 5, '-' = 1
	3218	+ $truncated_name = substr($base_name, 0, $available_space);
	3219	+ $truncated_name = rtrim($truncated_name, '-'); // Remove trailing hyphen
	3220	+ $channel_name = 'chat-' . $truncated_name . '-' . strtolower($session_suffix);
	3221	+ }
	3222	+
	3223	+ //error_log("[DEBUG] Using name for channel: {$channel_name} (from name: {$name})");
	3224	+
	3225	+ } elseif (!empty($email)) {
	3226	+ // Convert email to valid Slack channel name (your existing logic)
	3227	+ $channel_name = 'chat-' . strtolower(str_replace(['@', '.', '+', '_'], ['-at-', '-', '-plus-', '-'], $email));
	3228	+ // Remove any remaining invalid characters
	3229	+ $channel_name = preg_replace('/[^a-z0-9\-]/', '', $channel_name);
	3230	+ // Ensure it doesn't end with a hyphen
	3231	+ $channel_name = rtrim($channel_name, '-');
	3232	+ // Slack channel names have a 21 character limit, so truncate if needed
	3233	+ if (strlen($channel_name) > 21) {
	3234	+ $channel_name = substr($channel_name, 0, 21);
	3235	+ $channel_name = rtrim($channel_name, '-'); // Remove trailing hyphen if truncation created one
	3236	+ }
	3237	+
	3238	+ //error_log("[DEBUG] Using email for channel: {$channel_name} (from email: {$email})");
	3239	+
	3240	+ } else {
	3241	+ // Fallback to session ID if no name or email found
	3242	+ $channel_name = 'chat-' . strtolower(preg_replace('/[^a-zA-Z0-9]/', '', $session_id));
	3243	+ //error_log("[DEBUG] No name or email found, using session ID for channel: {$channel_name}");
	3244	+ }
	3245	+
	3246	+ // Final validation - ensure channel name meets Slack requirements
	3247	+ if (strlen($channel_name) > 21) {
	3248	+ $channel_name = substr($channel_name, 0, 21);
	3249	+ $channel_name = rtrim($channel_name, '-');
	3250	+ }
	3251	+
	3252	+ //error_log("[DEBUG] Generated channel name: {$channel_name}");
	3253	+ return $channel_name;
	3254	+}
	3255	+public function mxchat_send_user_message_to_agent($message, $user_id, $session_id) {
	3256	+ $slack_bot_token = $this->options['live_agent_bot_token'] ?? '';
	3257	+ $channel_id = get_option("mxchat_channel_{$session_id}", '');
	3258	+
	3259	+ if (empty($slack_bot_token) || empty($channel_id)) {
	3260	+ return false;
	3261	+ }
	3262	+
	3263	+ $user_message = "💬 *User:* {$message}";
	3264	+
	3265	+ $response = wp_remote_post('https://slack.com/api/chat.postMessage', [
	3266	+ 'headers' => [
	3267	+ 'Content-Type' => 'application/json',
	3268	+ 'Authorization' => 'Bearer ' . $slack_bot_token
	3269	+ ],
	3270	+ 'body' => json_encode([
	3271	+ 'channel' => $channel_id,
	3272	+ 'text' => $user_message,
	3273	+ 'mrkdwn' => true
	3274	+ ])
	3275	+ ]);
	3276	+
	3277	+ return !is_wp_error($response);
	3278	+}
	3279	+public function handle_slack_interaction(WP_REST_Request $request) {
	3280	+ //error_log('Received Slack interaction');
	3281	+
	3282	+ $payload = json_decode($request->get_param('payload'), true);
	3283	+ //error_log('Payload: ' . print_r($payload, true));
	3284	+
	3285	+ // Handle button click
	3286	+ if ($payload['type'] === 'block_actions' && $payload['actions'][0]['action_id'] === 'reply_to_user') {
	3287	+ $session_id = $payload['actions'][0]['value'];
	3288	+ $trigger_id = $payload['trigger_id'];
	3289	+
	3290	+ // Get Bot Token from settings
	3291	+ $slack_token = $this->options['live_agent_bot_token'] ?? '';
	3292	+
	3293	+ if (empty($slack_token)) {
	3294	+ //error_log('Slack Bot Token not configured');
	3295	+ return new WP_REST_Response(['error' => esc_html__('Bot token not configured', 'mxchat')], 400);
	3296	+ }
	3297	+ $response = wp_remote_post('https://slack.com/api/views.open', [
	3298	+ 'headers' => [
	3299	+ 'Content-Type' => 'application/json',
	3300	+ 'Authorization' => 'Bearer ' . $slack_token
	3301	+ ],
	3302	+ 'body' => json_encode([
	3303	+ 'trigger_id' => $trigger_id,
	3304	+ 'view' => [
	3305	+ 'type' => 'modal',
	3306	+ 'callback_id' => 'reply_modal',
	3307	+ 'title' => [
	3308	+ 'type' => 'plain_text',
	3309	+ 'text' => __('Reply to User', 'mxchat')
	3310	+ ],
	3311	+ 'submit' => [
	3312	+ 'type' => 'plain_text',
	3313	+ 'text' => __('Send', 'mxchat')
	3314	+ ],
	3315	+ 'close' => [
	3316	+ 'type' => 'plain_text',
	3317	+ 'text' => __('Cancel', 'mxchat')
	3318	+ ],
	3319	+ 'blocks' => [
	3320	+ [
	3321	+ 'type' => 'input',
	3322	+ 'block_id' => 'reply_block',
	3323	+ 'label' => [
	3324	+ 'type' => 'plain_text',
	3325	+ 'text' => sprintf(__('Reply to session: %s', 'mxchat'), $session_id)
	3326	+ ],
	3327	+ 'element' => [
	3328	+ 'type' => 'plain_text_input',
	3329	+ 'action_id' => 'message',
	3330	+ 'multiline' => true,
	3331	+ 'placeholder' => [
	3332	+ 'type' => 'plain_text',
	3333	+ 'text' => __('Type your message here...', 'mxchat')
	3334	+ ]
	3335	+ ]
	3336	+ ]
	3337	+ ],
	3338	+ 'private_metadata' => $session_id
	3339	+ ]
	3340	+ ])
	3341	+ ]);
	3342	+
	3343	+ //error_log('Views.open response: ' . print_r($response, true));
	3344	+
	3345	+ // Return immediate acknowledgment
	3346	+ return new WP_REST_Response(['ok' => true]);
	3347	+ }
	3348	+
	3349	+ // Handle modal submission
	3350	+// Handle modal submission
	3351	+if ($payload['type'] === 'view_submission') {
	3352	+ $session_id = $payload['view']['private_metadata'];
	3353	+ $message = $payload['view']['state']['values']['reply_block']['message']['value'];
	3354	+
	3355	+ // Save the message (keep the message_id but don't include in response)
	3356	+ $this->mxchat_save_chat_message($session_id, 'agent', $message);
	3357	+
	3358	+ // Keep the original response format for Slack
	3359	+ return new WP_REST_Response([
	3360	+ 'response_action' => 'clear'
	3361	+ ]);
	3362	+}
	3363	+
	3364	+ // Default acknowledgment
	3365	+ return new WP_REST_Response(['ok' => true]);
	3366	+}
	3367	+public function mxchat_handle_agent_response(WP_REST_Request $request) {
	3368	+ //error_log('Received agent response request');
	3369	+ //error_log('Request data: ' . print_r($request->get_params(), true));
	3370	+ // //error_log('Raw body: ' . file_get_contents('php://input'));
	3371	+
	3372	+ // Get the data from Slack's slash command format
	3373	+ $command_text = $request->get_param('text');
	3374	+ // //error_log('Command text: ' . $command_text);
	3375	+
	3376	+ if (empty($command_text)) {
	3377	+ //error_log(esc_html__('Agent response error: No command text received', 'mxchat'));
	3378	+ return new WP_REST_Response([
	3379	+ 'error' => esc_html__('Command text is required. Format: /reply session_id message', 'mxchat')
	3380	+ ], 400);
	3381	+ }
	3382	+
	3383	+ // Split the command text into session_id and message
	3384	+ $parts = explode(' ', $command_text, 2);
	3385	+ if (count($parts) !== 2) {
	3386	+ //error_log('Agent response error: Invalid command format');
	3387	+ return new WP_REST_Response([
	3388	+ 'error' => esc_html__('Invalid format. Use: /reply session_id message', 'mxchat')
	3389	+ ], 400);
	3390	+ }
	3391	+
	3392	+ $session_id = sanitize_text_field($parts[0]);
	3393	+ $message = sanitize_text_field($parts[1]);
	3394	+
	3395	+ //error_log("Processing agent response - Session ID: $session_id, Message: $message");
	3396	+
	3397	+ // Save the message
	3398	+ $message_id = $this->mxchat_save_chat_message($session_id, 'agent', $message);
	3399	+
	3400	+ if (!$message_id) {
	3401	+ // //error_log('Failed to save agent message');
	3402	+ return new WP_REST_Response([
	3403	+ 'error' => esc_html__('Failed to save message', 'mxchat')
	3404	+ ], 500);
	3405	+ }
	3406	+
	3407	+ // Return success response in Slack's expected format
	3408	+ return new WP_REST_Response([
	3409	+ 'response_type' => 'in_channel',
	3410	+ 'text' => esc_html__("Message sent successfully to session $session_id", 'mxchat')
	3411	+ ], 200);
	3412	+}
	3413	+public function mxchat_handle_switch_to_chatbot_intent($message, $user_id, $session_id) {
	3414	+ // Update mode to AI
	3415	+ update_option("mxchat_mode_{$session_id}", 'ai');
	3416	+
	3417	+ // Clear any existing PDF context to start fresh
	3418	+ $this->clear_pdf_transients($session_id);
	3419	+
	3420	+ // Set the response with explicit chat_mode
	3421	+ $this->fallbackResponse = [
	3422	+ 'text' => esc_html__('You are now chatting with the AI chatbot.', 'mxchat'),
	3423	+ 'html' => '',
	3424	+ 'images' => [],
	3425	+ 'chat_mode' => 'ai' // Ensure this is set
	3426	+ ];
	3427	+
	3428	+ // Return the complete response array instead of just true
	3429	+ return $this->fallbackResponse;
	3430	+}
	3431	+
	3432	+public function handle_slack_messages(WP_REST_Request $request) {
	3433	+ // Log the incoming request for debugging
	3434	+ //error_log('Slack events request received: ' . $request->get_body());
	3435	+
	3436	+ $body = $request->get_body();
	3437	+ $data = json_decode($body, true);
	3438	+
	3439	+ // Handle Slack URL verification
	3440	+ if (isset($data['type']) && $data['type'] === 'url_verification') {
	3441	+ //error_log('Slack URL verification challenge: ' . $data['challenge']);
	3442	+ return new WP_REST_Response($data['challenge'], 200, ['Content-Type' => 'text/plain']);
	3443	+ }
	3444	+
	3445	+ // IMPORTANT: Handle Slack's event deduplication
	3446	+ if (isset($data['event_id'])) {
	3447	+ $event_id = $data['event_id'];
	3448	+ $processed_events = get_transient('mxchat_slack_events') ?: [];
	3449	+
	3450	+ // Check if we've already processed this event
	3451	+ if (in_array($event_id, $processed_events)) {
	3452	+ //error_log("Duplicate event detected: $event_id");
	3453	+ return new WP_REST_Response(['ok' => true]);
	3454	+ }
	3455	+
	3456	+ // Add this event to processed list
	3457	+ $processed_events[] = $event_id;
	3458	+ // Keep only last 100 events to prevent memory issues
	3459	+ if (count($processed_events) > 100) {
	3460	+ $processed_events = array_slice($processed_events, -100);
	3461	+ }
	3462	+ // Store for 1 hour
	3463	+ set_transient('mxchat_slack_events', $processed_events, HOUR_IN_SECONDS);
	3464	+ }
	3465	+
	3466	+ // Handle message events
	3467	+ if (isset($data['event']) && $data['event']['type'] === 'message') {
	3468	+ $event = $data['event'];
	3469	+
	3470	+ // Skip bot messages and messages with subtypes (like bot_message)
	3471	+ if (isset($event['bot_id']) || isset($event['subtype'])) {
	3472	+ return new WP_REST_Response(['ok' => true]);
	3473	+ }
	3474	+
	3475	+ // Additional check: Skip if this is a threaded reply to our confirmation
	3476	+ if (isset($event['thread_ts']) && $event['thread_ts'] !== $event['ts']) {
	3477	+ return new WP_REST_Response(['ok' => true]);
	3478	+ }
	3479	+
	3480	+ $channel_id = $event['channel'];
	3481	+ $message_text = $event['text'] ?? '';
	3482	+ $message_ts = $event['ts'] ?? '';
	3483	+
	3484	+ // Find session ID by looking for matching channel
	3485	+ global $wpdb;
	3486	+ $session_option = $wpdb->get_var(
	3487	+ $wpdb->prepare(
	3488	+ "SELECT option_name FROM {$wpdb->options}
	3489	+ WHERE option_name LIKE 'mxchat_channel_%'
	3490	+ AND option_value = %s",
	3491	+ $channel_id
	3492	+ )
	3493	+ );
	3494	+
	3495	+ if ($session_option) {
	3496	+ $session_id = str_replace('mxchat_channel_', '', $session_option);
	3497	+
	3498	+ // Create a unique key for this specific message
	3499	+ $message_key = md5($session_id . $message_ts . $message_text);
	3500	+ $processed_messages = get_transient('mxchat_processed_messages_' . $session_id) ?: [];
	3501	+
	3502	+ // Check if we've already processed this exact message
	3503	+ if (in_array($message_key, $processed_messages)) {
	3504	+ //error_log("Duplicate message detected for session $session_id");
	3505	+ return new WP_REST_Response(['ok' => true]);
	3506	+ }
	3507	+
	3508	+ // Add to processed messages
	3509	+ $processed_messages[] = $message_key;
	3510	+ // Keep only last 50 messages per session
	3511	+ if (count($processed_messages) > 50) {
	3512	+ $processed_messages = array_slice($processed_messages, -50);
	3513	+ }
	3514	+ set_transient('mxchat_processed_messages_' . $session_id, $processed_messages, HOUR_IN_SECONDS);
	3515	+
	3516	+ // Save the agent message
	3517	+ $this->mxchat_save_chat_message($session_id, 'agent', $message_text);
	3518	+
	3519	+ // Send confirmation back to Slack (only once)
	3520	+ $slack_bot_token = $this->options['live_agent_bot_token'] ?? '';
	3521	+ if (!empty($slack_bot_token)) {
	3522	+ // Use a transient to prevent duplicate confirmations
	3523	+ $confirm_key = 'mxchat_confirm_' . $message_key;
	3524	+ if (!get_transient($confirm_key)) {
	3525	+ wp_remote_post('https://slack.com/api/chat.postMessage', [
	3526	+ 'headers' => [
	3527	+ 'Content-Type' => 'application/json',
	3528	+ 'Authorization' => 'Bearer ' . $slack_bot_token
	3529	+ ],
	3530	+ 'body' => json_encode([
	3531	+ 'channel' => $channel_id,
	3532	+ 'text' => "✅ _Message sent to user_",
	3533	+ 'thread_ts' => $event['ts'] // Reply in thread
	3534	+ ])
	3535	+ ]);
	3536	+ // Set transient to prevent duplicate confirmations
	3537	+ set_transient($confirm_key, true, 300); // 5 minutes
	3538	+ }
	3539	+ }
	3540	+ }
	3541	+ }
	3542	+
	3543	+ return new WP_REST_Response(['ok' => true]);
	3544	+}
	3545	+
	3546	+// For the word upload handler
	3547	+public function mxchat_handle_word_upload() {
	3548	+ // Delegate to word handler
	3549	+ $this->word_handler->mxchat_handle_word_upload();
	3550	+}
	3551	+
	3552	+// For the word removal handler
	3553	+public function mxchat_handle_word_remove() {
	3554	+ // Delegate to word handler
	3555	+ $this->word_handler->mxchat_handle_word_remove();
	3556	+}
	3557	+
	3558	+// For the word status check
	3559	+public function mxchat_check_word_status() {
	3560	+ // Delegate to word handler
	3561	+ $this->word_handler->mxchat_check_word_status();
	3562	+}
	3563	+
	3564	+
	3565	+private function mxchat_get_user_identifier() {
	3566	+ return MxChat_User::mxchat_get_user_identifier();
	3567	+}
	3568	+
	3569	+private function mxchat_generate_embedding($text, $api_key) {
	3570	+ try {
	3571	+ // Get options and selected model
	3572	+ $options = get_option('mxchat_options');
	3573	+ $selected_model = $options['embedding_model'] ?? 'text-embedding-ada-002';
	3574	+
	3575	+ // Determine endpoint and API key based on model
	3576	+ if (strpos($selected_model, 'voyage') === 0) {
	3577	+ $endpoint = 'https://api.voyageai.com/v1/embeddings';
	3578	+ $api_key = $options['voyage_api_key'] ?? '';
	3579	+
	3580	+ // Check if Voyage API key is missing
	3581	+ if (empty($api_key)) {
	3582	+ //error_log('Voyage API key is missing');
	3583	+ return [
	3584	+ 'error' => esc_html__('Voyage AI API key is not configured', 'mxchat'),
	3585	+ 'error_code' => 'missing_voyage_api_key'
	3586	+ ];
	3587	+ }
	3588	+ } elseif (strpos($selected_model, 'gemini-embedding') === 0) {
	3589	+ $endpoint = 'https://generativelanguage.googleapis.com/v1beta/models/' . $selected_model . ':embedContent';
	3590	+ $api_key = $options['gemini_api_key'] ?? '';
	3591	+
	3592	+ // Check if Gemini API key is missing
	3593	+ if (empty($api_key)) {
	3594	+ //error_log('Gemini API key is missing');
	3595	+ return [
	3596	+ 'error' => esc_html__('Google Gemini API key is not configured', 'mxchat'),
	3597	+ 'error_code' => 'missing_gemini_api_key'
	3598	+ ];
	3599	+ }
	3600	+ } else {
	3601	+ $endpoint = 'https://api.openai.com/v1/embeddings';
	3602	+ // Use the passed API key for OpenAI
	3603	+
	3604	+ // Check if OpenAI API key is missing
	3605	+ if (empty($api_key)) {
	3606	+ //error_log('OpenAI API key is missing');
	3607	+ return [
	3608	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	3609	+ 'error_code' => 'missing_openai_api_key'
	3610	+ ];
	3611	+ }
	3612	+ }
	3613	+
	3614	+ // Check if text is empty
	3615	+ if (empty($text)) {
	3616	+ //error_log('Empty text provided for embedding generation');
	3617	+ return [
	3618	+ 'error' => esc_html__('No text provided for embedding generation', 'mxchat'),
	3619	+ 'error_code' => 'empty_embedding_text'
	3620	+ ];
	3621	+ }
	3622	+
	3623	+ // Prepare request body based on provider
	3624	+ if (strpos($selected_model, 'gemini-embedding') === 0) {
	3625	+ // Gemini API format
	3626	+ $request_body = [
	3627	+ 'model' => 'models/' . $selected_model,
	3628	+ 'content' => [
	3629	+ 'parts' => [
	3630	+ ['text' => $text]
	3631	+ ]
	3632	+ ],
	3633	+ 'outputDimensionality' => 1536
	3634	+ ];
	3635	+
	3636	+ // Prepare headers for Gemini (API key as query parameter)
	3637	+ $endpoint .= '?key=' . $api_key;
	3638	+ $headers = [
	3639	+ 'Content-Type' => 'application/json'
	3640	+ ];
	3641	+ } else {
	3642	+ // OpenAI/Voyage API format
	3643	+ $request_body = [
	3644	+ 'input' => $text,
	3645	+ 'model' => $selected_model
	3646	+ ];
	3647	+
	3648	+ // Add output_dimension for voyage-3-large
	3649	+ if ($selected_model === 'voyage-3-large') {
	3650	+ $request_body['output_dimension'] = 2048;
	3651	+ }
	3652	+
	3653	+ // Prepare headers for OpenAI/Voyage
	3654	+ $headers = [
	3655	+ 'Content-Type' => 'application/json',
	3656	+ 'Authorization' => 'Bearer ' . $api_key
	3657	+ ];
	3658	+ }
	3659	+
	3660	+ // Prepare request arguments
	3661	+ $args = [
	3662	+ 'body' => wp_json_encode($request_body),
	3663	+ 'headers' => $headers,
	3664	+ 'timeout' => 60,
	3665	+ 'redirection' => 5,
	3666	+ 'blocking' => true,
	3667	+ 'httpversion' => '1.0',
	3668	+ 'sslverify' => true,
	3669	+ ];
	3670	+
	3671	+ // Make the request
	3672	+ $response = wp_remote_post($endpoint, $args);
	3673	+
	3674	+ // Handle WordPress errors
	3675	+ if (is_wp_error($response)) {
	3676	+ $error_message = $response->get_error_message();
	3677	+ //error_log('Embedding Generation Error: ' . $error_message);
	3678	+ return [
	3679	+ 'error' => esc_html__('Connection error when generating embeddings: ', 'mxchat') . esc_html($error_message),
	3680	+ 'error_code' => 'embedding_connection_error'
	3681	+ ];
	3682	+ }
	3683	+
	3684	+ // Check HTTP status code
	3685	+ $status_code = wp_remote_retrieve_response_code($response);
	3686	+ if ($status_code !== 200) {
	3687	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	3688	+
	3689	+ $error_message = isset($response_body['error']['message'])
	3690	+ ? $response_body['error']['message']
	3691	+ : 'HTTP Error ' . $status_code;
	3692	+
	3693	+ $error_type = isset($response_body['error']['type'])
	3694	+ ? $response_body['error']['type']
	3695	+ : 'unknown';
	3696	+
	3697	+ //error_log('Embedding API HTTP Error: ' . $status_code . ' - ' . $error_message);
	3698	+
	3699	+ // Handle specific error types
	3700	+ switch ($error_type) {
	3701	+ case 'invalid_request_error':
	3702	+ if (strpos($error_message, 'API key') !== false) {
	3703	+ return [
	3704	+ 'error' => esc_html__('Invalid API key for embedding generation. Please check your API key configuration.', 'mxchat'),
	3705	+ 'error_code' => 'embedding_invalid_api_key'
	3706	+ ];
	3707	+ }
	3708	+ break;
	3709	+
	3710	+ case 'authentication_error':
	3711	+ return [
	3712	+ 'error' => esc_html__('Authentication failed for embedding generation. Please check your API key.', 'mxchat'),
	3713	+ 'error_code' => 'embedding_auth_error'
	3714	+ ];
	3715	+
	3716	+ case 'rate_limit_exceeded':
	3717	+ return [
	3718	+ 'error' => esc_html__('Rate limit exceeded for embedding generation. Please try again later.', 'mxchat'),
	3719	+ 'error_code' => 'embedding_rate_limit'
	3720	+ ];
	3721	+
	3722	+ case 'quota_exceeded':
	3723	+ return [
	3724	+ 'error' => esc_html__('API quota exceeded for embedding generation. Please check your billing details.', 'mxchat'),
	3725	+ 'error_code' => 'embedding_quota_exceeded'
	3726	+ ];
	3727	+ }
	3728	+
	3729	+ // Generic error fallback
	3730	+ return [
	3731	+ 'error' => esc_html__('Embedding API error - check embedding API key.: ', 'mxchat') . esc_html($error_message),
	3732	+ 'error_code' => 'embedding_api_error',
	3733	+ 'status_code' => $status_code
	3734	+ ];
	3735	+ }
	3736	+
	3737	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	3738	+
	3739	+ // Handle different response formats based on provider
	3740	+ if (strpos($selected_model, 'gemini-embedding') === 0) {
	3741	+ // Gemini API response format
	3742	+ if (isset($response_body['embedding']['values']) && is_array($response_body['embedding']['values'])) {
	3743	+ return $response_body['embedding']['values'];
	3744	+ } else {
	3745	+ //error_log('Invalid Gemini embedding response: ' . wp_json_encode($response_body));
	3746	+ return [
	3747	+ 'error' => esc_html__('Received invalid embedding data from the Gemini API.', 'mxchat'),
	3748	+ 'error_code' => 'invalid_gemini_embedding_response'
	3749	+ ];
	3750	+ }
	3751	+ } else {
	3752	+ // OpenAI/Voyage API response format
	3753	+ if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) {
	3754	+ return $response_body['data'][0]['embedding'];
	3755	+ } else {
	3756	+ //error_log('Invalid embedding response: ' . wp_json_encode($response_body));
	3757	+ return [
	3758	+ 'error' => esc_html__('Received invalid embedding data from the API.', 'mxchat'),
	3759	+ 'error_code' => 'invalid_embedding_response'
	3760	+ ];
	3761	+ }
	3762	+ }
	3763	+ } catch (Exception $e) {
	3764	+ //error_log('Embedding Exception: ' . $e->getMessage());
	3765	+ return [
	3766	+ 'error' => esc_html__('System error when generating embeddings: ', 'mxchat') . esc_html($e->getMessage()),
	3767	+ 'error_code' => 'embedding_exception'
	3768	+ ];
	3769	+ }
	3770	+}
	3771	+
	3772	+
	3773	+private function mxchat_find_relevant_content($user_embedding, $bot_id = 'default') {
	3774	+ error_log("MXCHAT DEBUG: find_relevant_content called with bot_id: " . $bot_id);
	3775	+
	3776	+ // Get bot-specific Pinecone configuration
	3777	+ $bot_pinecone_config = $this->get_bot_pinecone_config($bot_id);
	3778	+
	3779	+ // Debug: Log the Pinecone configuration
	3780	+ error_log("MXCHAT DEBUG: Pinecone config for bot '$bot_id':");
	3781	+ error_log(" - use_pinecone: " . ($bot_pinecone_config['use_pinecone'] ? 'true' : 'false'));
	3782	+ error_log(" - api_key: " . (empty($bot_pinecone_config['api_key']) ? 'EMPTY' : 'SET (hidden)'));
	3783	+ error_log(" - host: " . ($bot_pinecone_config['host'] ?? 'NOT SET'));
	3784	+ error_log(" - namespace: " . ($bot_pinecone_config['namespace'] ?? 'NOT SET'));
	3785	+
	3786	+ // Determine whether to use Pinecone based on bot configuration
	3787	+ $use_pinecone = isset($bot_pinecone_config['use_pinecone']) ? $bot_pinecone_config['use_pinecone'] : false;
	3788	+
	3789	+ error_log("MXCHAT DEBUG: Using " . ($use_pinecone ? "Pinecone" : "WordPress Database") . " for knowledge retrieval");
	3790	+
	3791	+ if ($use_pinecone) {
	3792	+ return $this->find_relevant_content_pinecone($user_embedding, $bot_id, $bot_pinecone_config);
	3793	+ } else {
	3794	+ return $this->find_relevant_content_wordpress($user_embedding, $bot_id);
	3795	+ }
	3796	+}
	3797	+
	3798	+private function find_relevant_content_wordpress($user_embedding, $bot_id = 'default') {
	3799	+ global $wpdb;
	3800	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	3801	+ $cache_key = 'mxchat_system_prompt_embeddings_' . $bot_id;
	3802	+ $batch_size = 500;
	3803	+
	3804	+ // Initialize similarity analysis storage
	3805	+ $this->last_similarity_analysis = [
	3806	+ 'knowledge_base_type' => 'WordPress Database',
	3807	+ 'bot_id' => $bot_id,
	3808	+ 'top_matches' => [],
	3809	+ 'threshold_used' => 0,
	3810	+ 'total_checked' => 0
	3811	+ ];
	3812	+
	3813	+ // NEW: Initialize valid URLs array
	3814	+ $valid_urls = [];
	3815	+
	3816	+ // Get bot-specific options for similarity threshold
	3817	+ $bot_options = $this->get_bot_options($bot_id);
	3818	+ $current_options = !empty($bot_options) ? $bot_options : $this->options;
	3819	+
	3820	+ // Retrieve embeddings from cache or database
	3821	+ $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
	3822	+ if ($embeddings === false) {
	3823	+ // Cache miss - load embeddings from database WITH CONTENT and ROLE RESTRICTION for testing
	3824	+ $embeddings = [];
	3825	+ $offset = 0;
	3826	+
	3827	+ do {
	3828	+ // Add bot_id filter if not default and if bot_metadata column exists
	3829	+ $bot_filter = '';
	3830	+ if ($bot_id !== 'default') {
	3831	+ // Check if bot_metadata column exists
	3832	+ $column_exists = $wpdb->get_var("SHOW COLUMNS FROM {$system_prompt_table} LIKE 'bot_metadata'");
	3833	+ if ($column_exists) {
	3834	+ $bot_filter = $wpdb->prepare(" AND (bot_metadata = %s OR bot_metadata IS NULL OR bot_metadata = '')", $bot_id);
	3835	+ }
	3836	+ }
	3837	+
	3838	+ $query = $wpdb->prepare(
	3839	+ "SELECT id, embedding_vector, article_content, source_url, role_restriction
	3840	+ FROM {$system_prompt_table}
	3841	+ WHERE 1=1 {$bot_filter}
	3842	+ LIMIT %d OFFSET %d",
	3843	+ $batch_size,
	3844	+ $offset
	3845	+ );
	3846	+
	3847	+ $batch = $wpdb->get_results($query);
	3848	+ if (empty($batch)) {
	3849	+ break;
	3850	+ }
	3851	+
	3852	+ $embeddings = array_merge($embeddings, $batch);
	3853	+ $offset += $batch_size;
	3854	+ unset($batch);
	3855	+ } while (true);
	3856	+
	3857	+ if (empty($embeddings)) {
	3858	+ // Store empty array for valid URLs since no content found
	3859	+ $this->current_valid_urls = [];
	3860	+ return '';
	3861	+ }
	3862	+
	3863	+ // Cache embeddings for future use (but note: this now includes content and role restrictions)
	3864	+ wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
	3865	+ }
	3866	+
	3867	+ // Get knowledge manager instance for role checking
	3868	+ $knowledge_manager = MxChat_Knowledge_Manager::get_instance();
	3869	+
	3870	+ // Get base similarity threshold from bot options or default options
	3871	+ $similarity_threshold = isset($current_options['similarity_threshold'])
	3872	+ ? ((int) $current_options['similarity_threshold']) / 100
	3873	+ : 0.35;
	3874	+
	3875	+ $this->last_similarity_analysis['threshold_used'] = $similarity_threshold;
	3876	+
	3877	+ // Calculate similarities and build results array
	3878	+ $all_similarities = [];
	3879	+ $relevant_results = [];
	3880	+
	3881	+ foreach ($embeddings as $embedding) {
	3882	+ $database_embedding = $embedding->embedding_vector
	3883	+ ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
	3884	+ : null;
	3885	+
	3886	+ if (is_array($database_embedding) && is_array($user_embedding)) {
	3887	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
	3888	+
	3889	+ // Check role access
	3890	+ $role_restriction = $embedding->role_restriction ?? 'public';
	3891	+ $has_access = $knowledge_manager->mxchat_user_has_content_access($role_restriction);
	3892	+
	3893	+ // Store ALL similarities for testing (top 10)
	3894	+ $source_display = '';
	3895	+ if (!empty($embedding->source_url) && $embedding->source_url !== '#') {
	3896	+ $source_display = $embedding->source_url;
	3897	+ } else {
	3898	+ $content_preview = strip_tags($embedding->article_content ?? '');
	3899	+ $content_preview = preg_replace('/\s+/', ' ', $content_preview);
	3900	+ $source_display = substr(trim($content_preview), 0, 50) . '...';
	3901	+ }
	3902	+
	3903	+ $all_similarities[] = [
	3904	+ 'document_id' => $embedding->id,
	3905	+ 'similarity' => $similarity,
	3906	+ 'similarity_percentage' => round($similarity * 100, 2),
	3907	+ 'above_threshold' => $similarity >= $similarity_threshold,
	3908	+ 'source_display' => $source_display,
	3909	+ 'content_preview' => substr(strip_tags($embedding->article_content ?? ''), 0, 100) . '...',
	3910	+ 'used_for_context' => false, // Initialize as false, we'll update this later
	3911	+ 'role_restriction' => $role_restriction,
	3912	+ 'has_access' => $has_access,
	3913	+ 'filtered_out' => !$has_access
	3914	+ ];
	3915	+
	3916	+ // Only consider results above threshold AND with access for actual content retrieval
	3917	+ if ($similarity >= $similarity_threshold && $has_access) {
	3918	+ $relevant_results[] = [
	3919	+ 'id' => $embedding->id,
	3920	+ 'similarity' => $similarity
	3921	+ ];
	3922	+ }
	3923	+ }
	3924	+
	3925	+ unset($database_embedding);
	3926	+ }
	3927	+
	3928	+ // Sort ALL similarities for testing display (highest first)
	3929	+ usort($all_similarities, function ($a, $b) {
	3930	+ return $b['similarity'] <=> $a['similarity'];
	3931	+ });
	3932	+
	3933	+ // Sort relevant results by similarity (highest first)
	3934	+ usort($relevant_results, function ($a, $b) {
	3935	+ return $b['similarity'] <=> $a['similarity'];
	3936	+ });
	3937	+
	3938	+ // Get top 5 results for actual content (standard approach)
	3939	+ $top_results = array_slice($relevant_results, 0, 3);
	3940	+
	3941	+ // NOW mark which documents are actually used for context
	3942	+ $used_document_ids = [];
	3943	+ foreach ($top_results as $result) {
	3944	+ $used_document_ids[] = $result['id'];
	3945	+ }
	3946	+
	3947	+ // Update the all_similarities array to mark which were actually used
	3948	+ foreach ($all_similarities as &$similarity_item) {
	3949	+ $similarity_item['used_for_context'] = in_array($similarity_item['document_id'], $used_document_ids);
	3950	+ }
	3951	+
	3952	+ // Store top 10 for testing panel (now with correct used_for_context flags and role info)
	3953	+ $this->last_similarity_analysis['top_matches'] = array_slice($all_similarities, 0, 10);
	3954	+ $this->last_similarity_analysis['total_checked'] = count($embeddings);
	3955	+
	3956	+ // Initialize final content
	3957	+ $content = '';
	3958	+
	3959	+ // Track document IDs to avoid duplicates
	3960	+ $added_document_ids = [];
	3961	+
	3962	+ // Fetch and format content for each selected result
	3963	+ foreach ($top_results as $index => $result) {
	3964	+ if (in_array($result['id'], $added_document_ids)) {
	3965	+ continue;
	3966	+ }
	3967	+
	3968	+ $chunk_content = $this->fetch_content_with_product_links($result['id']);
	3969	+ $added_document_ids[] = $result['id'];
	3970	+
	3971	+ // NEW: Extract source_url from database for this result
	3972	+ $source_url = $wpdb->get_var($wpdb->prepare(
	3973	+ "SELECT source_url FROM {$system_prompt_table} WHERE id = %d",
	3974	+ $result['id']
	3975	+ ));
	3976	+
	3977	+ // NEW: Add source_url to valid URLs list if it exists and is not empty/placeholder
	3978	+ if (!empty($source_url) && $source_url !== '#') {
	3979	+ $valid_urls[] = $source_url;
	3980	+ }
	3981	+
	3982	+ // NEW: Extract any URLs from the article content itself
	3983	+ preg_match_all(
	3984	+ '#\bhttps?://[^\s<>"\']+#i',
	3985	+ $chunk_content,
	3986	+ $content_urls
	3987	+ );
	3988	+ if (!empty($content_urls[0])) {
	3989	+ $valid_urls = array_merge($valid_urls, $content_urls[0]);
	3990	+ }
	3991	+
	3992	+ $content .= "## Reference " . ($index + 1) . " ##\n";
	3993	+ $content .= $chunk_content . "\n\n";
	3994	+
	3995	+ // PDF surrounding pages logic (unchanged)
	3996	+ if (strpos($chunk_content, '{"document_type":"pdf"') !== false) {
	3997	+ $surrounding_content = $wpdb->get_results($wpdb->prepare(
	3998	+ "SELECT id, article_content, role_restriction FROM {$system_prompt_table}
	3999	+ WHERE id IN (
	4000	+ (SELECT id FROM {$system_prompt_table} WHERE id < %d ORDER BY id DESC LIMIT 1),
	4001	+ (SELECT id FROM {$system_prompt_table} WHERE id > %d ORDER BY id ASC LIMIT 1)
	4002	+ )",
	4003	+ $result['id'],
	4004	+ $result['id']
	4005	+ ));
	4006	+
	4007	+ // Check role access for surrounding content too
	4008	+ if (!empty($surrounding_content[0])) {
	4009	+ $surrounding_role = $surrounding_content[0]->role_restriction ?? 'public';
	4010	+ if ($knowledge_manager->mxchat_user_has_content_access($surrounding_role)) {
	4011	+ // NEW: Extract URLs from surrounding content too
	4012	+ preg_match_all(
	4013	+ '#\bhttps?://[^\s<>"\']+#i',
	4014	+ $surrounding_content[0]->article_content,
	4015	+ $surrounding_urls
	4016	+ );
	4017	+ if (!empty($surrounding_urls[0])) {
	4018	+ $valid_urls = array_merge($valid_urls, $surrounding_urls[0]);
	4019	+ }
	4020	+
	4021	+ $content .= "## Related Content ##\n";
	4022	+ $content .= $surrounding_content[0]->article_content . "\n\n";
	4023	+ $added_document_ids[] = $surrounding_content[0]->id;
	4024	+ }
	4025	+ }
	4026	+
	4027	+ if (!empty($surrounding_content[1])) {
	4028	+ $surrounding_role = $surrounding_content[1]->role_restriction ?? 'public';
	4029	+ if ($knowledge_manager->mxchat_user_has_content_access($surrounding_role)) {
	4030	+ // NEW: Extract URLs from surrounding content too
	4031	+ preg_match_all(
	4032	+ '#\bhttps?://[^\s<>"\']+#i',
	4033	+ $surrounding_content[1]->article_content,
	4034	+ $surrounding_urls
	4035	+ );
	4036	+ if (!empty($surrounding_urls[0])) {
	4037	+ $valid_urls = array_merge($valid_urls, $surrounding_urls[0]);
	4038	+ }
	4039	+
	4040	+ $content .= "## Related Content ##\n";
	4041	+ $content .= $surrounding_content[1]->article_content . "\n\n";
	4042	+ $added_document_ids[] = $surrounding_content[1]->id;
	4043	+ }
	4044	+ }
	4045	+ }
	4046	+ }
	4047	+
	4048	+ // NEW: Store unique valid URLs for validation
	4049	+ $this->current_valid_urls = array_unique($valid_urls);
	4050	+
	4051	+ // Add response guidelines
	4052	+ if (empty($top_results)) {
	4053	+ $content = "No reference information was found for this query.\n\n";
	4054	+ } else {
	4055	+ $content .= "\n## Response Guidelines ##\n" .
	4056	+ "You are an AI Chatbot. Answer naturally and helpfully using only the information from the references above. " .
	4057	+ "Be conversational and friendly, but never mention your knowledge base or training data. " .
	4058	+ "If you don't have specific information or are uncertain about any details, it's always " .
	4059	+ "better to honestly say you don't know rather than making up or guessing at answers. " .
	4060	+ "When information is incomplete, let them know you are unsure.\n\n" .
	4061	+ "CRITICAL: When creating hyperlinks, always use proper markdown format with descriptive text: " .
	4062	+ "[descriptive text](url). NEVER use empty brackets like [](url). The text in brackets must describe what the link is about.";
	4063	+ }
	4064	+
	4065	+ return trim($content);
	4066	+}
	4067	+
	4068	+private function find_relevant_content_pinecone($user_embedding, $bot_id = 'default', $bot_config = null) {
	4069	+ global $wpdb;
	4070	+
	4071	+ error_log("MXCHAT DEBUG: find_relevant_content_pinecone called");
	4072	+ error_log(" - bot_id: " . $bot_id);
	4073	+ error_log(" - user_embedding is array: " . (is_array($user_embedding) ? 'yes' : 'no'));
	4074	+ error_log(" - user_embedding count: " . (is_array($user_embedding) ? count($user_embedding) : 'N/A'));
	4075	+
	4076	+ // Use bot-specific config or fall back to default
	4077	+ if ($bot_config === null) {
	4078	+ $bot_config = $this->get_bot_pinecone_config($bot_id);
	4079	+ }
	4080	+
	4081	+ $api_key = $bot_config['api_key'] ?? '';
	4082	+ $host = $bot_config['host'] ?? '';
	4083	+ $namespace = $bot_config['namespace'] ?? '';
	4084	+
	4085	+ error_log("MXCHAT DEBUG: Pinecone query parameters:");
	4086	+ error_log(" - API Key: " . (empty($api_key) ? 'EMPTY - ERROR!' : 'Present (length: ' . strlen($api_key) . ')'));
	4087	+ error_log(" - Host: " . (empty($host) ? 'EMPTY - ERROR!' : $host));
	4088	+ error_log(" - Namespace: " . (empty($namespace) ? 'EMPTY (will use default)' : $namespace));
	4089	+
	4090	+ // Initialize similarity analysis storage
	4091	+ $this->last_similarity_analysis = [
	4092	+ 'knowledge_base_type' => 'Pinecone',
	4093	+ 'bot_id' => $bot_id,
	4094	+ 'namespace' => $namespace,
	4095	+ 'top_matches' => [],
	4096	+ 'threshold_used' => 0,
	4097	+ 'total_checked' => 0
	4098	+ ];
	4099	+
	4100	+ // NEW: Initialize valid URLs array
	4101	+ $valid_urls = [];
	4102	+
	4103	+ if (empty($host) || empty($api_key)) {
	4104	+ error_log("MXCHAT DEBUG ERROR: Missing Pinecone host or API key!");
	4105	+ error_log(" - Host empty: " . (empty($host) ? 'YES' : 'NO'));
	4106	+ error_log(" - API key empty: " . (empty($api_key) ? 'YES' : 'NO'));
	4107	+ // Store empty array for valid URLs since we can't proceed
	4108	+ $this->current_valid_urls = [];
	4109	+ return '';
	4110	+ }
	4111	+
	4112	+ // Get knowledge manager instance for role checking
	4113	+ $knowledge_manager = MxChat_Knowledge_Manager::get_instance();
	4114	+
	4115	+ // Get the similarity threshold from the bot options or main options
	4116	+ $bot_options = $this->get_bot_options($bot_id);
	4117	+ $current_options = !empty($bot_options) ? $bot_options : get_option('mxchat_options', []);
	4118	+
	4119	+ $similarity_threshold = isset($current_options['similarity_threshold'])
	4120	+ ? ((int) $current_options['similarity_threshold']) / 100
	4121	+ : 0.35;
	4122	+
	4123	+ $this->last_similarity_analysis['threshold_used'] = $similarity_threshold;
	4124	+
	4125	+ // Prepare the query request for Pinecone
	4126	+ $api_endpoint = "https://{$host}/query";
	4127	+
	4128	+ $request_body = array(
	4129	+ 'vector' => $user_embedding,
	4130	+ 'topK' => 20, // Request more to get good testing data
	4131	+ 'includeMetadata' => true,
	4132	+ 'includeValues' => true
	4133	+ );
	4134	+
	4135	+ // Add namespace if specified for this bot
	4136	+ if (!empty($namespace)) {
	4137	+ $request_body['namespace'] = $namespace;
	4138	+ }
	4139	+
	4140	+ error_log("MXCHAT DEBUG: About to call Pinecone API");
	4141	+ error_log(" - Endpoint: " . $api_endpoint);
	4142	+ error_log(" - Namespace in request: " . (!empty($namespace) ? $namespace : 'NOT SET'));
	4143	+
	4144	+ $response = wp_remote_post($api_endpoint, array(
	4145	+ 'headers' => array(
	4146	+ 'Api-Key' => $api_key,
	4147	+ 'accept' => 'application/json',
	4148	+ 'content-type' => 'application/json'
	4149	+ ),
	4150	+ 'body' => wp_json_encode($request_body),
	4151	+ 'timeout' => 30
	4152	+ ));
	4153	+
	4154	+ if (is_wp_error($response)) {
	4155	+ error_log("MXCHAT DEBUG ERROR: WP Error in Pinecone request: " . $response->get_error_message());
	4156	+ // Store empty array for valid URLs
	4157	+ $this->current_valid_urls = [];
	4158	+ return '';
	4159	+ }
	4160	+
	4161	+ $response_code = wp_remote_retrieve_response_code($response);
	4162	+ error_log("MXCHAT DEBUG: Pinecone response code: " . $response_code);
	4163	+
	4164	+ if ($response_code !== 200) {
	4165	+ $response_body = wp_remote_retrieve_body($response);
	4166	+ error_log("MXCHAT DEBUG ERROR: Pinecone API error response: " . substr($response_body, 0, 500));
	4167	+ // Store empty array for valid URLs
	4168	+ $this->current_valid_urls = [];
	4169	+ return '';
	4170	+ }
	4171	+
	4172	+ // ADD DETAILED DEBUG SECTION HERE
	4173	+ $response_body = wp_remote_retrieve_body($response);
	4174	+ error_log("MXCHAT DEBUG: Raw Pinecone response length: " . strlen($response_body));
	4175	+
	4176	+ $results = json_decode($response_body, true);
	4177	+
	4178	+ if (json_last_error() !== JSON_ERROR_NONE) {
	4179	+ error_log("MXCHAT DEBUG ERROR: JSON decode error: " . json_last_error_msg());
	4180	+ error_log("MXCHAT DEBUG: First 500 chars of response: " . substr($response_body, 0, 500));
	4181	+ // Store empty array for valid URLs
	4182	+ $this->current_valid_urls = [];
	4183	+ return '';
	4184	+ }
	4185	+
	4186	+ error_log("MXCHAT DEBUG: Pinecone response structure:");
	4187	+ error_log(" - Has 'matches' key: " . (isset($results['matches']) ? 'yes' : 'no'));
	4188	+ error_log(" - Has 'namespace' key: " . (isset($results['namespace']) ? 'yes (' . $results['namespace'] . ')' : 'no'));
	4189	+
	4190	+ if (empty($results['matches'])) {
	4191	+ error_log("MXCHAT DEBUG: No matches found in Pinecone response");
	4192	+ error_log("MXCHAT DEBUG: Response keys: " . implode(', ', array_keys($results)));
	4193	+ // Store empty array for valid URLs
	4194	+ $this->current_valid_urls = [];
	4195	+ return '';
	4196	+ }
	4197	+
	4198	+ error_log("MXCHAT DEBUG: Found " . count($results['matches']) . " matches in Pinecone");
	4199	+
	4200	+ // Log first match details for debugging
	4201	+ if (!empty($results['matches'][0])) {
	4202	+ $first_match = $results['matches'][0];
	4203	+ error_log("MXCHAT DEBUG: First match details:");
	4204	+ error_log(" - Score: " . ($first_match['score'] ?? 'no score'));
	4205	+ error_log(" - Has metadata: " . (isset($first_match['metadata']) ? 'yes' : 'no'));
	4206	+ if (isset($first_match['metadata'])) {
	4207	+ error_log(" - Metadata keys: " . implode(', ', array_keys($first_match['metadata'])));
	4208	+ }
	4209	+ }
	4210	+
	4211	+ // Initialize the final content
	4212	+ $content = '';
	4213	+ $matches_used = 0;
	4214	+ $matches_used_for_context = [];
	4215	+
	4216	+ // Process each match for actual content generation (lazy role checking)
	4217	+ foreach ($results['matches'] as $index => $match) {
	4218	+ // Skip if similarity is below threshold
	4219	+ if ($match['score'] < $similarity_threshold) {
	4220	+ continue;
	4221	+ }
	4222	+
	4223	+ // Limit to top 3 matches above threshold
	4224	+ if ($matches_used >= 3) {
	4225	+ break;
	4226	+ }
	4227	+
	4228	+ if (!empty($match['metadata']['text'])) {
	4229	+ // LAZY ROLE CHECK: Only check role for content we're actually considering
	4230	+ $match_id = $match['id'] ?? '';
	4231	+ $role_restriction = $this->get_single_vector_role($match_id, $match['metadata']);
	4232	+ $has_access = $knowledge_manager->mxchat_user_has_content_access($role_restriction);
	4233	+
	4234	+ // Skip if user doesn't have access
	4235	+ if (!$has_access) {
	4236	+ continue;
	4237	+ }
	4238	+
	4239	+ // User has access - add to content
	4240	+ $content .= "## Reference " . ($matches_used + 1) . " ##\n";
	4241	+ $content .= $match['metadata']['text'] . "\n\n";
	4242	+
	4243	+ // NEW: Extract source_url from metadata if it exists
	4244	+ if (!empty($match['metadata']['source_url']) && $match['metadata']['source_url'] !== '#') {
	4245	+ $valid_urls[] = $match['metadata']['source_url'];
	4246	+ $content .= "URL: " . $match['metadata']['source_url'] . "\n\n";
	4247	+ }
	4248	+
	4249	+ // NEW: Extract any URLs from the text content itself
	4250	+ preg_match_all(
	4251	+ '#\bhttps?://[^\s<>"\']+#i',
	4252	+ $match['metadata']['text'],
	4253	+ $content_urls
	4254	+ );
	4255	+ if (!empty($content_urls[0])) {
	4256	+ $valid_urls = array_merge($valid_urls, $content_urls[0]);
	4257	+ }
	4258	+
	4259	+ $matches_used_for_context[] = $match['id'] ?? $index;
	4260	+ $matches_used++;
	4261	+ }
	4262	+ }
	4263	+
	4264	+ // Process ALL matches for testing data (top 10) - with role checking for testing display
	4265	+ $all_matches = [];
	4266	+ foreach ($results['matches'] as $index => $match) {
	4267	+ if ($index >= 10) break; // Limit to top 10 for testing
	4268	+
	4269	+ $match_id = $match['id'] ?? '';
	4270	+
	4271	+ // Check role access for testing display (use cache if available)
	4272	+ $role_restriction = $this->get_single_vector_role($match_id, $match['metadata']);
	4273	+ $has_access = $knowledge_manager->mxchat_user_has_content_access($role_restriction);
	4274	+
	4275	+ $source_display = '';
	4276	+ if (!empty($match['metadata']['source_url'])) {
	4277	+ $source_display = $match['metadata']['source_url'];
	4278	+ } else {
	4279	+ $content_preview = strip_tags($match['metadata']['text'] ?? '');
	4280	+ $content_preview = preg_replace('/\s+/', ' ', $content_preview);
	4281	+ $source_display = substr(trim($content_preview), 0, 50) . '...';
	4282	+ }
	4283	+
	4284	+ $match_id_for_display = $match['id'] ?? $index;
	4285	+
	4286	+ $all_matches[] = [
	4287	+ 'document_id' => $match_id_for_display,
	4288	+ 'similarity' => $match['score'],
	4289	+ 'similarity_percentage' => round($match['score'] * 100, 2),
	4290	+ 'above_threshold' => $match['score'] >= $similarity_threshold,
	4291	+ 'source_display' => $source_display,
	4292	+ 'content_preview' => substr(strip_tags($match['metadata']['text'] ?? ''), 0, 100) . '...',
	4293	+ 'used_for_context' => in_array($match_id_for_display, $matches_used_for_context),
	4294	+ 'role_restriction' => $role_restriction,
	4295	+ 'has_access' => $has_access,
	4296	+ 'filtered_out' => !$has_access
	4297	+ ];
	4298	+ }
	4299	+
	4300	+ // Store for testing panel
	4301	+ $this->last_similarity_analysis['top_matches'] = $all_matches;
	4302	+ $this->last_similarity_analysis['total_checked'] = count($results['matches']);
	4303	+
	4304	+ // NEW: Store unique valid URLs for validation
	4305	+ $this->current_valid_urls = array_unique($valid_urls);
	4306	+
	4307	+ // Add response guidelines
	4308	+ if ($matches_used === 0) {
	4309	+ $content = "No reference information was found for this query.\n\n";
	4310	+ } else {
	4311	+ $content .= "\n## Response Guidelines ##\n" .
	4312	+ "You are an AI Chatbot. Answer naturally and helpfully using only the information from the references above. " .
	4313	+ "Be conversational and friendly, but never mention your knowledge base or training data. " .
	4314	+ "If you don't have specific information or are uncertain about any details, it's always " .
	4315	+ "better to honestly say you don't know rather than making up or guessing at answers. " .
	4316	+ "When information is incomplete, let them know you are unsure.\n\n" .
	4317	+ "CRITICAL: When creating hyperlinks, always use proper markdown format with descriptive text: " .
	4318	+ "[descriptive text](url). NEVER use empty brackets like [](url). The text in brackets must describe what the link is about.";
	4319	+ }
	4320	+
	4321	+ return trim($content);
	4322	+}
	4323	+
	4324	+/**
	4325	+ * Get role restriction for a single vector (with caching)
	4326	+ */
	4327	+private function get_single_vector_role($vector_id, $metadata = array()) {
	4328	+ global $wpdb;
	4329	+
	4330	+ if (empty($vector_id)) {
	4331	+ return 'public';
	4332	+ }
	4333	+
	4334	+ // Check cache first
	4335	+ $cache_key = 'mxchat_vector_role_' . $vector_id;
	4336	+ $cached_role = wp_cache_get($cache_key, 'mxchat_vector_roles');
	4337	+
	4338	+ if ($cached_role !== false) {
	4339	+ return $cached_role;
	4340	+ }
	4341	+
	4342	+ $role_restriction = 'public';
	4343	+
	4344	+ // First try Pinecone metadata
	4345	+ if (!empty($metadata['role_restriction'])) {
	4346	+ $role_restriction = $metadata['role_restriction'];
	4347	+ } else {
	4348	+ // Check WordPress table for user-modified roles
	4349	+ $roles_table = $wpdb->prefix . 'mxchat_pinecone_roles';
	4350	+ $stored_role = $wpdb->get_var($wpdb->prepare(
	4351	+ "SELECT role_restriction FROM {$roles_table} WHERE vector_id = %s",
	4352	+ $vector_id
	4353	+ ));
	4354	+
	4355	+ if ($stored_role) {
	4356	+ $role_restriction = $stored_role;
	4357	+ }
	4358	+ }
	4359	+
	4360	+ // Cache individual role for 1 hour
	4361	+ wp_cache_set($cache_key, $role_restriction, 'mxchat_vector_roles', 3600);
	4362	+
	4363	+ return $role_restriction;
	4364	+}
	4365	+
	4366	+private function mxchat_find_relevant_products($user_embedding) {
	4367	+ //error_log('MXChat Vector Search: Starting product search...');
	4368	+
	4369	+ // Retrieve the add-on settings from the database
	4370	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	4371	+
	4372	+ // Determine whether Pinecone is enabled
	4373	+ $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
	4374	+
	4375	+ //error_log('Pinecone enabled flag: ' . $use_pinecone);
	4376	+
	4377	+ if ($use_pinecone === 1) {
	4378	+ //error_log('MXChat Vector Search: Using Pinecone database for products');
	4379	+ return $this->find_relevant_products_pinecone($user_embedding);
	4380	+ } else {
	4381	+ //error_log('MXChat Vector Search: Using WordPress database for products');
	4382	+ return $this->find_relevant_products_wordpress($user_embedding);
	4383	+ }
	4384	+}
	4385	+private function find_relevant_products_wordpress($user_embedding) {
	4386	+ global $wpdb;
	4387	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	4388	+ $cache_key = 'mxchat_system_prompt_embeddings';
	4389	+ $batch_size = 500;
	4390	+
	4391	+ // Original WordPress database search logic
	4392	+ // [Previous implementation remains the same]
	4393	+ $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
	4394	+ if ($embeddings === false) {
	4395	+ $embeddings = [];
	4396	+ $offset = 0;
	4397	+
	4398	+ do {
	4399	+ $query = $wpdb->prepare(
	4400	+ "SELECT id, embedding_vector
	4401	+ FROM {$system_prompt_table}
	4402	+ LIMIT %d OFFSET %d",
	4403	+ $batch_size,
	4404	+ $offset
	4405	+ );
	4406	+
	4407	+ $batch = $wpdb->get_results($query);
	4408	+ if (empty($batch)) {
	4409	+ break;
	4410	+ }
	4411	+
	4412	+ $embeddings = array_merge($embeddings, $batch);
	4413	+ $offset += $batch_size;
	4414	+
	4415	+ unset($batch);
	4416	+
	4417	+ } while (true);
	4418	+
	4419	+ if (empty($embeddings)) {
	4420	+ return '';
	4421	+ }
	4422	+ wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
	4423	+ }
	4424	+
	4425	+ $relevant_results = [];
	4426	+ foreach ($embeddings as $embedding) {
	4427	+ $database_embedding = $embedding->embedding_vector
	4428	+ ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
	4429	+ : null;
	4430	+ if (is_array($database_embedding) && is_array($user_embedding)) {
	4431	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
	4432	+ $relevant_results[] = [
	4433	+ 'id' => $embedding->id,
	4434	+ 'similarity' => $similarity
	4435	+ ];
	4436	+ }
	4437	+ unset($database_embedding);
	4438	+ }
	4439	+
	4440	+ // Use fixed threshold for products
	4441	+ $similarity_threshold = 0.85;
	4442	+
	4443	+ $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
	4444	+ return $result['similarity'] >= $similarity_threshold;
	4445	+ });
	4446	+ usort($relevant_results, function ($a, $b) {
	4447	+ return $b['similarity'] <=> $a['similarity'];
	4448	+ });
	4449	+
	4450	+ $top_results = array_slice($relevant_results, 0, 3);
	4451	+ $content = '';
	4452	+
	4453	+ foreach ($top_results as $result) {
	4454	+ $chunk_content = $this->fetch_content_with_product_links($result['id']);
	4455	+ $content .= $chunk_content . "\n\n";
	4456	+ }
	4457	+
	4458	+ return trim($content);
	4459	+}
	4460	+
	4461	+
	4462	+private function find_relevant_products_pinecone($user_embedding) {
	4463	+ //error_log('Starting Pinecone product search...');
	4464	+
	4465	+ $options = get_option('mxchat_pinecone_addon_options', array());
	4466	+ $api_key = $options['mxchat_pinecone_api_key'] ?? '';
	4467	+ $host = $options['mxchat_pinecone_host'] ?? '';
	4468	+
	4469	+ if (empty($host) || empty($api_key)) {
	4470	+ //error_log('Pinecone credentials not properly configured for product search');
	4471	+ return '';
	4472	+ }
	4473	+
	4474	+ $similarity_threshold = 0.85;
	4475	+ $api_endpoint = "https://{$host}/query";
	4476	+
	4477	+ $request_body = array(
	4478	+ 'vector' => $user_embedding,
	4479	+ 'topK' => 5,
	4480	+ 'includeMetadata' => true,
	4481	+ 'includeValues' => true,
	4482	+ 'filter' => array(
	4483	+ 'type' => 'product'
	4484	+ )
	4485	+ );
	4486	+
	4487	+ //error_log('Sending request to Pinecone with body: ' . wp_json_encode($request_body));
	4488	+
	4489	+ $response = wp_remote_post($api_endpoint, array(
	4490	+ 'headers' => array(
	4491	+ 'Api-Key' => $api_key,
	4492	+ 'accept' => 'application/json',
	4493	+ 'content-type' => 'application/json'
	4494	+ ),
	4495	+ 'body' => wp_json_encode($request_body),
	4496	+ 'timeout' => 30
	4497	+ ));
	4498	+
	4499	+ if (is_wp_error($response)) {
	4500	+ //error_log('Pinecone product query error: ' . $response->get_error_message());
	4501	+ return '';
	4502	+ }
	4503	+
	4504	+ $response_code = wp_remote_retrieve_response_code($response);
	4505	+ //error_log('Pinecone response code: ' . $response_code);
	4506	+
	4507	+ if ($response_code !== 200) {
	4508	+ //error_log('Pinecone API error during product search: ' . wp_remote_retrieve_body($response));
	4509	+ return '';
	4510	+ }
	4511	+
	4512	+ $results = json_decode(wp_remote_retrieve_body($response), true);
	4513	+ //error_log('Pinecone raw response: ' . wp_remote_retrieve_body($response));
	4514	+
	4515	+ if (empty($results['matches'])) {
	4516	+ //error_log('No matches found in Pinecone response');
	4517	+ return '';
	4518	+ }
	4519	+
	4520	+ $content = '';
	4521	+ foreach ($results['matches'] as $match) {
	4522	+ if ($match['score'] < $similarity_threshold) {
	4523	+ //error_log("Match below threshold: " . $match['score']);
	4524	+ continue;
	4525	+ }
	4526	+
	4527	+ if (!empty($match['metadata']['text'])) {
	4528	+ $content .= $match['metadata']['text'];
	4529	+ if (!empty($match['metadata']['source_url'])) {
	4530	+ $content .= "\n\nFor more details, check out this product: " . esc_url($match['metadata']['source_url']);
	4531	+ }
	4532	+ $content .= "\n\n";
	4533	+ }
	4534	+ }
	4535	+
	4536	+ return trim($content);
	4537	+}
	4538	+
	4539	+
	4540	+private function fetch_content_with_product_links($most_relevant_id) {
	4541	+ global $wpdb;
	4542	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	4543	+
	4544	+ // Fetch the article content and associated product URL
	4545	+ $query = $wpdb->prepare("SELECT article_content, source_url FROM {$system_prompt_table} WHERE id = %d", $most_relevant_id);
	4546	+ $result = $wpdb->get_row($query);
	4547	+
	4548	+ if ($result) {
	4549	+ // Append the product link to the content if available
	4550	+ $content = $result->article_content;
	4551	+ if (!empty($result->source_url)) {
	4552	+ $content .= "\n\nFor more details, check out this product: " . esc_url($result->source_url);
	4553	+ }
	4554	+ return $content;
	4555	+ }
	4556	+
	4557	+ return null;
	4558	+}
	4559	+
	4560	+/**
	4561	+ * Get system instructions for a specific bot or default
	4562	+ * Checks for multi-bot add-on and uses bot-specific instructions if available
	4563	+ */
	4564	+private function get_system_instructions($bot_id = 'default') {
	4565	+ // Check if multi-bot add-on is active
	4566	+ if (class_exists('MxChat_Multi_Bot_Core_Manager') && $bot_id !== 'default') {
	4567	+ // Get bot-specific options from multi-bot add-on
	4568	+ $bot_options = apply_filters('mxchat_get_bot_options', array(), $bot_id);
	4569	+
	4570	+ // If bot has custom system instructions, use those
	4571	+ if (!empty($bot_options['system_prompt_instructions'])) {
	4572	+ return $bot_options['system_prompt_instructions'];
	4573	+ }
	4574	+ }
	4575	+
	4576	+ // Fall back to default system instructions
	4577	+ return isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	4578	+}
	4579	+/**
	4580	+ * Get the current bot ID from session or request context
	4581	+ */
	4582	+private function get_current_bot_id($session_id = '') {
	4583	+ // First, check if bot_id is passed in the current request
	4584	+ if (isset($_POST['bot_id']) && !empty($_POST['bot_id'])) {
	4585	+ return sanitize_key($_POST['bot_id']);
	4586	+ }
	4587	+
	4588	+ // If not in POST, try to get it from session data
	4589	+ if (!empty($session_id)) {
	4590	+ $bot_id = get_option("mxchat_session_bot_{$session_id}", '');
	4591	+ if (!empty($bot_id)) {
	4592	+ return $bot_id;
	4593	+ }
	4594	+ }
	4595	+
	4596	+ // Fall back to default
	4597	+ return 'default';
	4598	+}
	4599	+private function mxchat_generate_response($relevant_content, $api_key, $xai_api_key, $claude_api_key, $deepseek_api_key, $gemini_api_key, $openrouter_api_key, $conversation_history, $streaming = false, $session_id = '', $testing_data = null, $selected_model = 'gpt-4o') {
	4600	+ try {
	4601	+ if (!$relevant_content) {
	4602	+ $error_response = [
	4603	+ 'error' => esc_html__("I couldn't find relevant information on that topic.", 'mxchat'),
	4604	+ 'error_code' => 'no_relevant_content'
	4605	+ ];
	4606	+
	4607	+ if ($testing_data !== null) {
	4608	+ $error_response['testing_data'] = $testing_data;
	4609	+ }
	4610	+
	4611	+ return $error_response;
	4612	+ }
	4613	+
	4614	+ if (!is_array($conversation_history)) {
	4615	+ $conversation_history = array();
	4616	+ }
	4617	+
	4618	+ // Check if this is an OpenRouter model
	4619	+ if ($selected_model === 'openrouter') {
	4620	+ // Get the actual OpenRouter model from options
	4621	+ $openrouter_selected_model = $this->options['openrouter_selected_model'] ?? '';
	4622	+
	4623	+ if (empty($openrouter_selected_model)) {
	4624	+ $error_response = [
	4625	+ 'error' => esc_html__('No OpenRouter model selected. Please select a model in settings.', 'mxchat'),
	4626	+ 'error_code' => 'no_openrouter_model_selected'
	4627	+ ];
	4628	+ if ($testing_data !== null) {
	4629	+ $error_response['testing_data'] = $testing_data;
	4630	+ }
	4631	+ return $error_response;
	4632	+ }
	4633	+
	4634	+ if (empty($openrouter_api_key)) {
	4635	+ $error_response = [
	4636	+ 'error' => esc_html__('OpenRouter API key is not configured', 'mxchat'),
	4637	+ 'error_code' => 'missing_openrouter_api_key'
	4638	+ ];
	4639	+ if ($testing_data !== null) {
	4640	+ $error_response['testing_data'] = $testing_data;
	4641	+ }
	4642	+ return $error_response;
	4643	+ }
	4644	+
	4645	+ if ($streaming) {
	4646	+ return $this->mxchat_generate_response_openrouter_stream(
	4647	+ $openrouter_selected_model,
	4648	+ $openrouter_api_key,
	4649	+ $conversation_history,
	4650	+ $relevant_content,
	4651	+ $session_id,
	4652	+ $testing_data
	4653	+ );
	4654	+ } else {
	4655	+ $response = $this->mxchat_generate_response_openrouter(
	4656	+ $openrouter_selected_model,
	4657	+ $openrouter_api_key,
	4658	+ $conversation_history,
	4659	+ $relevant_content
	4660	+ );
	4661	+ }
	4662	+
	4663	+ if (is_array($response) && isset($response['error'])) {
	4664	+ if ($testing_data !== null) {
	4665	+ $response['testing_data'] = $testing_data;
	4666	+ }
	4667	+ return $response;
	4668	+ }
	4669	+
	4670	+ return $response;
	4671	+ }
	4672	+
	4673	+ // Extract model prefix to determine the provider
	4674	+ $model_parts = explode('-', $selected_model);
	4675	+ $provider = strtolower($model_parts[0]);
	4676	+
	4677	+ // Handle model selection based on provider prefix
	4678	+ switch ($provider) {
	4679	+ case 'gemini':
	4680	+ if (empty($gemini_api_key)) {
	4681	+ $error_response = [
	4682	+ 'error' => esc_html__('Google Gemini API key is not configured', 'mxchat'),
	4683	+ 'error_code' => 'missing_gemini_api_key'
	4684	+ ];
	4685	+ if ($testing_data !== null) {
	4686	+ $error_response['testing_data'] = $testing_data;
	4687	+ }
	4688	+ return $error_response;
	4689	+ }
	4690	+ $response = $this->mxchat_generate_response_gemini(
	4691	+ $selected_model,
	4692	+ $gemini_api_key,
	4693	+ $conversation_history,
	4694	+ $relevant_content
	4695	+ );
	4696	+ break;
	4697	+
	4698	+ case 'claude':
	4699	+ if (empty($claude_api_key)) {
	4700	+ $error_response = [
	4701	+ 'error' => esc_html__('Claude API key is not configured', 'mxchat'),
	4702	+ 'error_code' => 'missing_claude_api_key'
	4703	+ ];
	4704	+ if ($testing_data !== null) {
	4705	+ $error_response['testing_data'] = $testing_data;
	4706	+ }
	4707	+ return $error_response;
	4708	+ }
	4709	+ if ($streaming) {
	4710	+ return $this->mxchat_generate_response_claude_stream(
	4711	+ $selected_model,
	4712	+ $claude_api_key,
	4713	+ $conversation_history,
	4714	+ $relevant_content,
	4715	+ $session_id,
	4716	+ $testing_data
	4717	+ );
	4718	+ } else {
	4719	+ $response = $this->mxchat_generate_response_claude(
	4720	+ $selected_model,
	4721	+ $claude_api_key,
	4722	+ $conversation_history,
	4723	+ $relevant_content
	4724	+ );
	4725	+ }
	4726	+ break;
	4727	+
	4728	+ case 'grok':
	4729	+ if (empty($xai_api_key)) {
	4730	+ $error_response = [
	4731	+ 'error' => esc_html__('X.AI API key is not configured', 'mxchat'),
	4732	+ 'error_code' => 'missing_xai_api_key'
	4733	+ ];
	4734	+ if ($testing_data !== null) {
	4735	+ $error_response['testing_data'] = $testing_data;
	4736	+ }
	4737	+ return $error_response;
	4738	+ }
	4739	+ if ($streaming) {
	4740	+ return $this->mxchat_generate_response_xai_stream(
	4741	+ $selected_model,
	4742	+ $xai_api_key,
	4743	+ $conversation_history,
	4744	+ $relevant_content,
	4745	+ $session_id,
	4746	+ $testing_data
	4747	+ );
	4748	+ } else {
	4749	+ $response = $this->mxchat_generate_response_xai(
	4750	+ $selected_model,
	4751	+ $xai_api_key,
	4752	+ $conversation_history,
	4753	+ $relevant_content
	4754	+ );
	4755	+ }
	4756	+ break;
	4757	+
	4758	+ case 'deepseek':
	4759	+ if (empty($deepseek_api_key)) {
	4760	+ $error_response = [
	4761	+ 'error' => esc_html__('DeepSeek API key is not configured', 'mxchat'),
	4762	+ 'error_code' => 'missing_deepseek_api_key'
	4763	+ ];
	4764	+ if ($testing_data !== null) {
	4765	+ $error_response['testing_data'] = $testing_data;
	4766	+ }
	4767	+ return $error_response;
	4768	+ }
	4769	+ if ($streaming) {
	4770	+ return $this->mxchat_generate_response_deepseek_stream(
	4771	+ $selected_model,
	4772	+ $deepseek_api_key,
	4773	+ $conversation_history,
	4774	+ $relevant_content,
	4775	+ $session_id,
	4776	+ $testing_data
	4777	+ );
	4778	+ } else {
	4779	+ $response = $this->mxchat_generate_response_deepseek(
	4780	+ $selected_model,
	4781	+ $deepseek_api_key,
	4782	+ $conversation_history,
	4783	+ $relevant_content
	4784	+ );
	4785	+ }
	4786	+ break;
	4787	+
	4788	+ case 'gpt':
	4789	+ case 'o1':
	4790	+ if (empty($api_key)) {
	4791	+ $error_response = [
	4792	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	4793	+ 'error_code' => 'missing_openai_api_key'
	4794	+ ];
	4795	+ if ($testing_data !== null) {
	4796	+ $error_response['testing_data'] = $testing_data;
	4797	+ }
	4798	+ return $error_response;
	4799	+ }
	4800	+ if ($streaming) {
	4801	+ return $this->mxchat_generate_response_openai_stream(
	4802	+ $selected_model,
	4803	+ $api_key,
	4804	+ $conversation_history,
	4805	+ $relevant_content,
	4806	+ $session_id,
	4807	+ $testing_data
	4808	+ );
	4809	+ } else {
	4810	+ $response = $this->mxchat_generate_response_openai(
	4811	+ $selected_model,
	4812	+ $api_key,
	4813	+ $conversation_history,
	4814	+ $relevant_content
	4815	+ );
	4816	+ }
	4817	+ break;
	4818	+
	4819	+ default:
	4820	+ if (empty($api_key)) {
	4821	+ $error_response = [
	4822	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	4823	+ 'error_code' => 'missing_openai_api_key'
	4824	+ ];
	4825	+ if ($testing_data !== null) {
	4826	+ $error_response['testing_data'] = $testing_data;
	4827	+ }
	4828	+ return $error_response;
	4829	+ }
	4830	+ if ($streaming) {
	4831	+ return $this->mxchat_generate_response_openai_stream(
	4832	+ $selected_model,
	4833	+ $api_key,
	4834	+ $conversation_history,
	4835	+ $relevant_content,
	4836	+ $session_id,
	4837	+ $testing_data
	4838	+ );
	4839	+ } else {
	4840	+ $response = $this->mxchat_generate_response_openai(
	4841	+ $selected_model,
	4842	+ $api_key,
	4843	+ $conversation_history,
	4844	+ $relevant_content
	4845	+ );
	4846	+ }
	4847	+ break;
	4848	+ }
	4849	+
	4850	+ if (is_array($response) && isset($response['error'])) {
	4851	+ if ($testing_data !== null) {
	4852	+ $response['testing_data'] = $testing_data;
	4853	+ }
	4854	+ return $response;
	4855	+ }
	4856	+
	4857	+ return $response;
	4858	+
	4859	+ } catch (Exception $e) {
	4860	+ $error_response = [
	4861	+ 'error' => sprintf(esc_html__('An error occurred: %s', 'mxchat'), esc_html($e->getMessage())),
	4862	+ 'error_code' => 'system_exception',
	4863	+ 'exception_details' => $e->getMessage()
	4864	+ ];
	4865	+
	4866	+ if ($testing_data !== null) {
	4867	+ $error_response['testing_data'] = $testing_data;
	4868	+ }
	4869	+
	4870	+ return $error_response;
	4871	+ }
	4872	+}
	4873	+private function mxchat_generate_response_openrouter_stream($selected_model, $openrouter_api_key, $conversation_history, $relevant_content, $session_id, $testing_data = null) {
	4874	+ try {
	4875	+ $bot_id = $this->get_current_bot_id($session_id);
	4876	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	4877	+
	4878	+ if (!is_array($conversation_history)) {
	4879	+ $conversation_history = array();
	4880	+ }
	4881	+
	4882	+ $formatted_conversation = array();
	4883	+
	4884	+ $formatted_conversation[] = array(
	4885	+ 'role' => 'system',
	4886	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	4887	+ );
	4888	+
	4889	+ foreach ($conversation_history as $message) {
	4890	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	4891	+ $role = $message['role'];
	4892	+ if ($role === 'bot' || $role === 'agent') {
	4893	+ $role = 'assistant';
	4894	+ }
	4895	+ if (!in_array($role, ['system', 'assistant', 'user'])) {
	4896	+ $role = 'user';
	4897	+ }
	4898	+ $formatted_conversation[] = array(
	4899	+ 'role' => $role,
	4900	+ 'content' => $message['content']
	4901	+ );
	4902	+ }
	4903	+ }
	4904	+
	4905	+ if (headers_sent() || !function_exists('curl_init')) {
	4906	+ $regular_response = $this->mxchat_generate_response_openrouter(
	4907	+ $selected_model,
	4908	+ $openrouter_api_key,
	4909	+ $conversation_history,
	4910	+ $relevant_content
	4911	+ );
	4912	+
	4913	+ $response_data = [
	4914	+ 'text' => $regular_response,
	4915	+ 'html' => '',
	4916	+ 'session_id' => $session_id
	4917	+ ];
	4918	+
	4919	+ if ($testing_data !== null) {
	4920	+ $response_data['testing_data'] = $testing_data;
	4921	+ }
	4922	+
	4923	+ header('Content-Type: application/json');
	4924	+ echo json_encode($response_data);
	4925	+ return true;
	4926	+ }
	4927	+
	4928	+ $body = json_encode([
	4929	+ 'model' => $selected_model,
	4930	+ 'messages' => $formatted_conversation,
	4931	+ 'temperature' => 1,
	4932	+ 'stream' => true
	4933	+ ]);
	4934	+
	4935	+ $ch = curl_init();
	4936	+ curl_setopt($ch, CURLOPT_URL, 'https://openrouter.ai/api/v1/chat/completions');
	4937	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
	4938	+ curl_setopt($ch, CURLOPT_POST, true);
	4939	+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	4940	+ curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	4941	+ 'Content-Type: application/json',
	4942	+ 'Authorization: Bearer ' . $openrouter_api_key,
	4943	+ 'HTTP-Referer: ' . home_url(),
	4944	+ 'X-Title: ' . get_bloginfo('name')
	4945	+ ));
	4946	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	4947	+ curl_setopt($ch, CURLOPT_TIMEOUT, 60);
	4948	+
	4949	+ $full_response = '';
	4950	+ $stream_started = false;
	4951	+ $buffer = '';
	4952	+
	4953	+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use (&$full_response, &$stream_started, &$buffer, $testing_data) {
	4954	+ if (!$stream_started && $testing_data !== null) {
	4955	+ echo "data: " . json_encode(['testing_data' => $testing_data]) . "\n\n";
	4956	+ flush();
	4957	+ $stream_started = true;
	4958	+ }
	4959	+
	4960	+ $buffer .= $data;
	4961	+ $lines = explode("\n", $buffer);
	4962	+ $buffer = array_pop($lines);
	4963	+
	4964	+ foreach ($lines as $line) {
	4965	+ if (trim($line) === '') {
	4966	+ continue;
	4967	+ }
	4968	+
	4969	+ if (strpos($line, 'data: ') !== 0) {
	4970	+ continue;
	4971	+ }
	4972	+
	4973	+ $json_str = substr($line, 6);
	4974	+
	4975	+ if (trim($json_str) === '[DONE]') {
	4976	+ echo "data: [DONE]\n\n";
	4977	+ flush();
	4978	+ continue;
	4979	+ }
	4980	+
	4981	+ $json = json_decode(trim($json_str), true);
	4982	+ if ($json && isset($json['choices'][0]['delta']['content'])) {
	4983	+ $content = $json['choices'][0]['delta']['content'];
	4984	+ $full_response .= $content;
	4985	+
	4986	+ echo "data: " . json_encode(['content' => $content]) . "\n\n";
	4987	+ flush();
	4988	+ }
	4989	+ }
	4990	+
	4991	+ return strlen($data);
	4992	+ });
	4993	+
	4994	+ $response = curl_exec($ch);
	4995	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	4996	+
	4997	+ if (curl_errno($ch) || $http_code !== 200) {
	4998	+ curl_close($ch);
	4999	+
	5000	+ $regular_response = $this->mxchat_generate_response_openrouter(
	5001	+ $selected_model,
	5002	+ $openrouter_api_key,
	5003	+ $conversation_history,
	5004	+ $relevant_content
	5005	+ );
	5006	+
	5007	+ $response_data = [
	5008	+ 'text' => $regular_response,
	5009	+ 'html' => '',
	5010	+ 'session_id' => $session_id
	5011	+ ];
	5012	+
	5013	+ if ($testing_data !== null) {
	5014	+ $response_data['testing_data'] = $testing_data;
	5015	+ }
	5016	+
	5017	+ header('Content-Type: application/json');
	5018	+ echo json_encode($response_data);
	5019	+ return true;
	5020	+ }
	5021	+
	5022	+ curl_close($ch);
	5023	+
	5024	+ if (!empty($full_response) && !empty($session_id)) {
	5025	+ $this->mxchat_save_chat_message($session_id, 'bot', $full_response);
	5026	+ }
	5027	+
	5028	+ return true;
	5029	+
	5030	+ } catch (Exception $e) {
	5031	+ $regular_response = $this->mxchat_generate_response_openrouter(
	5032	+ $selected_model,
	5033	+ $openrouter_api_key,
	5034	+ $conversation_history,
	5035	+ $relevant_content
	5036	+ );
	5037	+
	5038	+ $response_data = [
	5039	+ 'text' => $regular_response,
	5040	+ 'html' => '',
	5041	+ 'session_id' => $session_id
	5042	+ ];
	5043	+
	5044	+ if ($testing_data !== null) {
	5045	+ $response_data['testing_data'] = $testing_data;
	5046	+ }
	5047	+
	5048	+ header('Content-Type: application/json');
	5049	+ echo json_encode($response_data);
	5050	+ return true;
	5051	+ }
	5052	+}
	5053	+private function mxchat_generate_response_openai_stream($selected_model, $api_key, $conversation_history, $relevant_content, $session_id, $testing_data = null) {
	5054	+ try {
	5055	+ $bot_id = $this->get_current_bot_id($session_id);
	5056	+
	5057	+ // Get system prompt instructions using centralized function
	5058	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	5059	+
	5060	+ // Ensure conversation_history is an array
	5061	+ if (!is_array($conversation_history)) {
	5062	+ $conversation_history = array();
	5063	+ }
	5064	+
	5065	+ // Format conversation history for OpenAI
	5066	+ $formatted_conversation = array();
	5067	+
	5068	+ $formatted_conversation[] = array(
	5069	+ 'role' => 'system',
	5070	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	5071	+ );
	5072	+
	5073	+ foreach ($conversation_history as $message) {
	5074	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	5075	+ $role = $message['role'];
	5076	+ if ($role === 'bot' || $role === 'agent') {
	5077	+ $role = 'assistant';
	5078	+ }
	5079	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	5080	+ $role = 'user';
	5081	+ }
	5082	+ $formatted_conversation[] = array(
	5083	+ 'role' => $role,
	5084	+ 'content' => $message['content']
	5085	+ );
	5086	+ }
	5087	+ }
	5088	+
	5089	+ // Check if we can actually stream
	5090	+ if (headers_sent() || !function_exists('curl_init')) {
	5091	+ // Fallback to regular response with testing data
	5092	+ $regular_response = $this->mxchat_generate_response_openai(
	5093	+ $selected_model,
	5094	+ $api_key,
	5095	+ $conversation_history,
	5096	+ $relevant_content
	5097	+ );
	5098	+
	5099	+ $response_data = [
	5100	+ 'text' => $regular_response,
	5101	+ 'html' => '',
	5102	+ 'session_id' => $session_id
	5103	+ ];
	5104	+
	5105	+ if ($testing_data !== null) {
	5106	+ $response_data['testing_data'] = $testing_data;
	5107	+ }
	5108	+
	5109	+ header('Content-Type: application/json');
	5110	+ echo json_encode($response_data);
	5111	+ return true;
	5112	+ }
	5113	+
	5114	+ // Check if this is a GPT-5 model (supports reasoning_effort parameter)
	5115	+ $is_gpt5_model = (
	5116	+ strpos($selected_model, 'gpt-5') === 0 ||
	5117	+ $selected_model === 'gpt-5.1-2025-11-13' ||
	5118	+ $selected_model === 'gpt-5' ||
	5119	+ $selected_model === 'gpt-5-mini' ||
	5120	+ $selected_model === 'gpt-5-nano'
	5121	+ );
	5122	+
	5123	+ // Build request body with optimal settings for fast streaming
	5124	+ $request_body = [
	5125	+ 'model' => $selected_model,
	5126	+ 'messages' => $formatted_conversation,
	5127	+ 'temperature' => 1,
	5128	+ 'stream' => true
	5129	+ ];
	5130	+
	5131	+ // Add reasoning_effort only for GPT-5 models
	5132	+ if ($is_gpt5_model) {
	5133	+ // GPT-5.1 uses 'low' instead of 'minimal'
	5134	+ if ($selected_model === 'gpt-5.1-2025-11-13') {
	5135	+ $request_body['reasoning_effort'] = 'low';
	5136	+ } else {
	5137	+ $request_body['reasoning_effort'] = 'minimal'; // For other GPT-5 models
	5138	+ }
	5139	+ }
	5140	+
	5141	+ $body = json_encode($request_body);
	5142	+
	5143	+ // Use cURL for streaming support
	5144	+ $ch = curl_init();
	5145	+ curl_setopt($ch, CURLOPT_URL, 'https://api.openai.com/v1/chat/completions');
	5146	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
	5147	+ curl_setopt($ch, CURLOPT_POST, true);
	5148	+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	5149	+ curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	5150	+ 'Content-Type: application/json',
	5151	+ 'Authorization: Bearer ' . $api_key
	5152	+ ));
	5153	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	5154	+ curl_setopt($ch, CURLOPT_TIMEOUT, 60);
	5155	+
	5156	+ $full_response = ''; // Accumulate full response for saving
	5157	+ $stream_started = false;
	5158	+ $buffer = ''; // CRITICAL: Add persistent buffer for incomplete chunks
	5159	+
	5160	+ // Buffer control for real-time streaming
	5161	+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use (&$full_response, &$stream_started, &$buffer, $testing_data) {
	5162	+ // Send testing data as the first event if available
	5163	+ if (!$stream_started && $testing_data !== null) {
	5164	+ echo "data: " . json_encode(['testing_data' => $testing_data]) . "\n\n";
	5165	+ flush();
	5166	+ $stream_started = true;
	5167	+ }
	5168	+
	5169	+ // CRITICAL FIX: Append new data to buffer
	5170	+ $buffer .= $data;
	5171	+
	5172	+ // Process complete lines only
	5173	+ $lines = explode("\n", $buffer);
	5174	+
	5175	+ // CRITICAL FIX: Keep the last incomplete line in the buffer
	5176	+ // The last element might be incomplete, so keep it in buffer
	5177	+ $buffer = array_pop($lines);
	5178	+
	5179	+ foreach ($lines as $line) {
	5180	+ // Skip empty lines
	5181	+ if (trim($line) === '') {
	5182	+ continue;
	5183	+ }
	5184	+
	5185	+ // Only process lines that start with "data: "
	5186	+ if (strpos($line, 'data: ') !== 0) {
	5187	+ continue;
	5188	+ }
	5189	+
	5190	+ $json_str = substr($line, 6); // Remove 'data: ' prefix
	5191	+
	5192	+ if (trim($json_str) === '[DONE]') {
	5193	+ echo "data: [DONE]\n\n";
	5194	+ flush();
	5195	+ continue;
	5196	+ }
	5197	+
	5198	+ // Try to decode JSON
	5199	+ $json = json_decode(trim($json_str), true);
	5200	+ if ($json && isset($json['choices'][0]['delta']['content'])) {
	5201	+ $content = $json['choices'][0]['delta']['content'];
	5202	+ $full_response .= $content; // Accumulate the full response
	5203	+
	5204	+ // Send as SSE format
	5205	+ echo "data: " . json_encode(['content' => $content]) . "\n\n";
	5206	+ flush();
	5207	+ }
	5208	+ }
	5209	+
	5210	+ return strlen($data);
	5211	+ });
	5212	+
	5213	+ $response = curl_exec($ch);
	5214	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	5215	+
	5216	+ if (curl_errno($ch) || $http_code !== 200) {
	5217	+ $curl_error = curl_error($ch);
	5218	+ curl_close($ch);
	5219	+
	5220	+ // Fallback to regular response
	5221	+ $regular_response = $this->mxchat_generate_response_openai(
	5222	+ $selected_model,
	5223	+ $api_key,
	5224	+ $conversation_history,
	5225	+ $relevant_content
	5226	+ );
	5227	+
	5228	+ // FIXED: Check if regular response returned an error
	5229	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5230	+ // Send error in SSE format since we're in streaming mode
	5231	+ echo "data: " . json_encode([
	5232	+ 'error' => true,
	5233	+ 'error_message' => $regular_response['error'],
	5234	+ 'error_code' => $regular_response['error_code'] ?? 'api_error',
	5235	+ 'text' => $regular_response['error'],
	5236	+ 'message' => $regular_response['error']
	5237	+ ]) . "\n\n";
	5238	+ echo "data: [DONE]\n\n";
	5239	+ flush();
	5240	+ return true;
	5241	+ }
	5242	+
	5243	+ $response_data = [
	5244	+ 'text' => $regular_response,
	5245	+ 'html' => '',
	5246	+ 'session_id' => $session_id
	5247	+ ];
	5248	+
	5249	+ if ($testing_data !== null) {
	5250	+ $response_data['testing_data'] = $testing_data;
	5251	+ }
	5252	+
	5253	+ header('Content-Type: application/json');
	5254	+ echo json_encode($response_data);
	5255	+ return true;
	5256	+ }
	5257	+
	5258	+ curl_close($ch);
	5259	+
	5260	+ // Save the complete response to maintain chat persistence
	5261	+ if (!empty($full_response) && !empty($session_id)) {
	5262	+ $this->mxchat_save_chat_message($session_id, 'bot', $full_response);
	5263	+ }
	5264	+
	5265	+ return true; // Indicate streaming completed successfully
	5266	+
	5267	+ } catch (Exception $e) {
	5268	+ // Fallback to regular response
	5269	+ $regular_response = $this->mxchat_generate_response_openai(
	5270	+ $selected_model,
	5271	+ $api_key,
	5272	+ $conversation_history,
	5273	+ $relevant_content
	5274	+ );
	5275	+
	5276	+ // FIXED: Check if regular response returned an error
	5277	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5278	+ // Send error in SSE format since we're in streaming mode
	5279	+ echo "data: " . json_encode([
	5280	+ 'error' => true,
	5281	+ 'error_message' => $regular_response['error'],
	5282	+ 'error_code' => $regular_response['error_code'] ?? 'api_error',
	5283	+ 'text' => $regular_response['error'],
	5284	+ 'message' => $regular_response['error']
	5285	+ ]) . "\n\n";
	5286	+ echo "data: [DONE]\n\n";
	5287	+ flush();
	5288	+ return true;
	5289	+ }
	5290	+
	5291	+ $response_data = [
	5292	+ 'text' => $regular_response,
	5293	+ 'html' => '',
	5294	+ 'session_id' => $session_id
	5295	+ ];
	5296	+
	5297	+ if ($testing_data !== null) {
	5298	+ $response_data['testing_data'] = $testing_data;
	5299	+ }
	5300	+
	5301	+ header('Content-Type: application/json');
	5302	+ echo json_encode($response_data);
	5303	+ return true;
	5304	+ }
	5305	+}
	5306	+private function mxchat_generate_response_claude_stream($selected_model, $claude_api_key, $conversation_history, $relevant_content, $session_id, $testing_data = null) {
	5307	+ try {
	5308	+ // Get bot ID from session or request
	5309	+ $bot_id = $this->get_current_bot_id($session_id);
	5310	+
	5311	+ // Get system prompt instructions using centralized function
	5312	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	5313	+ // Ensure conversation_history is an array
	5314	+ if (!is_array($conversation_history)) {
	5315	+ $conversation_history = array();
	5316	+ }
	5317	+
	5318	+ // Clean and validate conversation history
	5319	+ foreach ($conversation_history as &$message) {
	5320	+ // Convert bot and agent roles to assistant
	5321	+ if ($message['role'] === 'bot' || $message['role'] === 'agent') {
	5322	+ $message['role'] = 'assistant';
	5323	+ }
	5324	+
	5325	+ // Remove unsupported roles - Claude only supports 'assistant' and 'user'
	5326	+ if (!in_array($message['role'], ['assistant', 'user'])) {
	5327	+ $message['role'] = 'user';
	5328	+ }
	5329	+
	5330	+ // Ensure content field exists
	5331	+ if (!isset($message['content']) || empty($message['content'])) {
	5332	+ $message['content'] = '';
	5333	+ }
	5334	+
	5335	+ // Remove any unsupported fields
	5336	+ $message = array_intersect_key($message, array_flip(['role', 'content']));
	5337	+ }
	5338	+
	5339	+ // Add relevant content as the latest user message
	5340	+ $conversation_history[] = [
	5341	+ 'role' => 'user',
	5342	+ 'content' => $relevant_content
	5343	+ ];
	5344	+
	5345	+ // Prepare the request body with stream: true
	5346	+ $body = json_encode([
	5347	+ 'model' => $selected_model,
	5348	+ 'messages' => $conversation_history,
	5349	+ 'max_tokens' => 1000,
	5350	+ 'temperature' => 0.8,
	5351	+ 'system' => $system_prompt_instructions,
	5352	+ 'stream' => true
	5353	+ ]);
	5354	+
	5355	+ // Check if we can actually stream (headers not sent, etc.)
	5356	+ if (headers_sent() || !function_exists('curl_init')) {
	5357	+ // Fallback to regular response with testing data
	5358	+ //error_log("MxChat: Streaming not possible, falling back to regular response");
	5359	+ $regular_response = $this->mxchat_generate_response_claude(
	5360	+ $selected_model,
	5361	+ $claude_api_key,
	5362	+ array_slice($conversation_history, 0, -1), // Remove the added content
	5363	+ $relevant_content
	5364	+ );
	5365	+
	5366	+ // Return as JSON with testing data
	5367	+ $response_data = [
	5368	+ 'text' => $regular_response,
	5369	+ 'html' => '',
	5370	+ 'session_id' => $session_id
	5371	+ ];
	5372	+
	5373	+ if ($testing_data !== null) {
	5374	+ $response_data['testing_data'] = $testing_data;
	5375	+ //error_log("MxChat Testing: Added testing data to Claude fallback response");
	5376	+ }
	5377	+
	5378	+ // Clear any streaming headers and send JSON
	5379	+ if (headers_sent() === false) {
	5380	+ header('Content-Type: application/json');
	5381	+ }
	5382	+ echo json_encode($response_data);
	5383	+ return true; // Indicate we handled the response
	5384	+ }
	5385	+
	5386	+ // Use cURL for streaming support
	5387	+ $ch = curl_init();
	5388	+ curl_setopt($ch, CURLOPT_URL, 'https://api.anthropic.com/v1/messages');
	5389	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
	5390	+ curl_setopt($ch, CURLOPT_POST, true);
	5391	+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	5392	+ curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	5393	+ 'Content-Type: application/json',
	5394	+ 'x-api-key: ' . $claude_api_key,
	5395	+ 'anthropic-version: 2023-06-01'
	5396	+ ));
	5397	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	5398	+ curl_setopt($ch, CURLOPT_TIMEOUT, 60);
	5399	+
	5400	+ $full_response = ''; // Accumulate full response for saving
	5401	+ $stream_started = false;
	5402	+ $buffer = ''; // CRITICAL: Add persistent buffer for incomplete chunks
	5403	+
	5404	+ // Buffer control for real-time streaming
	5405	+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use (&$full_response, &$stream_started, &$buffer, $testing_data) {
	5406	+ // Send testing data as the first event if available
	5407	+ if (!$stream_started && $testing_data !== null) {
	5408	+ echo "data: " . json_encode(['testing_data' => $testing_data]) . "\n\n";
	5409	+ flush();
	5410	+ $stream_started = true;
	5411	+ //error_log("MxChat Testing: Sent testing data in Claude stream");
	5412	+ }
	5413	+
	5414	+ // CRITICAL FIX: Append new data to buffer
	5415	+ $buffer .= $data;
	5416	+
	5417	+ // Process complete lines only
	5418	+ $lines = explode("\n", $buffer);
	5419	+
	5420	+ // CRITICAL FIX: Keep the last incomplete line in the buffer
	5421	+ // The last element might be incomplete, so keep it in buffer
	5422	+ $buffer = array_pop($lines);
	5423	+
	5424	+ foreach ($lines as $line) {
	5425	+ if (trim($line) === '') {
	5426	+ continue;
	5427	+ }
	5428	+
	5429	+ // Claude uses event: and data: format
	5430	+ if (strpos($line, 'event: ') === 0) {
	5431	+ // Store the event type for the next data line
	5432	+ continue;
	5433	+ }
	5434	+
	5435	+ if (strpos($line, 'data: ') === 0) {
	5436	+ $json_str = substr($line, 6); // Remove 'data: ' prefix
	5437	+
	5438	+ $json = json_decode(trim($json_str), true);
	5439	+ if (json_last_error() !== JSON_ERROR_NONE) {
	5440	+ continue;
	5441	+ }
	5442	+
	5443	+ // Handle different event types
	5444	+ if (isset($json['type'])) {
	5445	+ switch ($json['type']) {
	5446	+ case 'content_block_delta':
	5447	+ if (isset($json['delta']['text'])) {
	5448	+ $content = $json['delta']['text'];
	5449	+ $full_response .= $content; // Accumulate
	5450	+ // Send as SSE format compatible with your frontend
	5451	+ echo "data: " . json_encode(['content' => $content]) . "\n\n";
	5452	+ flush();
	5453	+ }
	5454	+ break;
	5455	+
	5456	+ case 'message_stop':
	5457	+ echo "data: [DONE]\n\n";
	5458	+ flush();
	5459	+ break;
	5460	+
	5461	+ case 'error':
	5462	+ echo "data: " . json_encode(['error' => $json['error']['message'] ?? 'Unknown error']) . "\n\n";
	5463	+ flush();
	5464	+ break;
	5465	+ }
	5466	+ }
	5467	+ }
	5468	+ }
	5469	+
	5470	+ return strlen($data);
	5471	+ });
	5472	+
	5473	+ $response = curl_exec($ch);
	5474	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	5475	+
	5476	+ if (curl_errno($ch)) {
	5477	+ curl_close($ch);
	5478	+ throw new Exception('cURL Error: ' . curl_error($ch));
	5479	+ }
	5480	+
	5481	+ curl_close($ch);
	5482	+
	5483	+ if ($http_code !== 200) {
	5484	+ // Fallback to regular response
	5485	+ //error_log("MxChat: Claude streaming failed with HTTP $http_code, falling back");
	5486	+ $regular_response = $this->mxchat_generate_response_claude(
	5487	+ $selected_model,
	5488	+ $claude_api_key,
	5489	+ array_slice($conversation_history, 0, -1), // Remove the added content
	5490	+ $relevant_content
	5491	+ );
	5492	+
	5493	+ // FIXED: Check if regular response returned an error
	5494	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5495	+ // Send error in SSE format since we're in streaming mode
	5496	+ echo "data: " . json_encode([
	5497	+ 'error' => true,
	5498	+ 'error_message' => $regular_response['error'],
	5499	+ 'error_code' => $regular_response['error_code'] ?? 'api_error',
	5500	+ 'text' => $regular_response['error'],
	5501	+ 'message' => $regular_response['error']
	5502	+ ]) . "\n\n";
	5503	+ echo "data: [DONE]\n\n";
	5504	+ flush();
	5505	+ return true;
	5506	+ }
	5507	+
	5508	+ $response_data = [
	5509	+ 'text' => $regular_response,
	5510	+ 'html' => '',
	5511	+ 'session_id' => $session_id
	5512	+ ];
	5513	+
	5514	+ if ($testing_data !== null) {
	5515	+ $response_data['testing_data'] = $testing_data;
	5516	+ //error_log("MxChat Testing: Added testing data to Claude error fallback");
	5517	+ }
	5518	+
	5519	+ header('Content-Type: application/json');
	5520	+ echo json_encode($response_data);
	5521	+ return true;
	5522	+ }
	5523	+
	5524	+ // Save the complete response to maintain chat persistence
	5525	+ if (!empty($full_response) && !empty($session_id)) {
	5526	+ $this->mxchat_save_chat_message($session_id, 'bot', $full_response);
	5527	+ }
	5528	+
	5529	+ return true; // Indicate streaming completed successfully
	5530	+
	5531	+ } catch (Exception $e) {
	5532	+ //error_log("MxChat Claude streaming exception: " . $e->getMessage());
	5533	+
	5534	+ // Fallback to regular response on exception
	5535	+ $regular_response = $this->mxchat_generate_response_claude(
	5536	+ $selected_model,
	5537	+ $claude_api_key,
	5538	+ $conversation_history,
	5539	+ $relevant_content
	5540	+ );
	5541	+
	5542	+ // FIXED: Check if regular response returned an error
	5543	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5544	+ // Send error in SSE format since we're in streaming mode
	5545	+ echo "data: " . json_encode([
	5546	+ 'error' => true,
	5547	+ 'error_message' => $regular_response['error'],
	5548	+ 'error_code' => $regular_response['error_code'] ?? 'api_error',
	5549	+ 'text' => $regular_response['error'],
	5550	+ 'message' => $regular_response['error']
	5551	+ ]) . "\n\n";
	5552	+ echo "data: [DONE]\n\n";
	5553	+ flush();
	5554	+ return true;
	5555	+ }
	5556	+
	5557	+ $response_data = [
	5558	+ 'text' => $regular_response,
	5559	+ 'html' => '',
	5560	+ 'session_id' => $session_id
	5561	+ ];
	5562	+
	5563	+ if ($testing_data !== null) {
	5564	+ $response_data['testing_data'] = $testing_data;
	5565	+ //error_log("MxChat Testing: Added testing data to Claude exception fallback");
	5566	+ }
	5567	+
	5568	+ header('Content-Type: application/json');
	5569	+ echo json_encode($response_data);
	5570	+ return true;
	5571	+ }
	5572	+}
	5573	+private function mxchat_generate_response_xai_stream($selected_model, $xai_api_key, $conversation_history, $relevant_content, $session_id, $testing_data = null) {
	5574	+ try {
	5575	+ // Get bot ID from session or request
	5576	+ $bot_id = $this->get_current_bot_id($session_id);
	5577	+
	5578	+ // Get system prompt instructions using centralized function
	5579	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	5580	+
	5581	+ // Ensure conversation_history is an array
	5582	+ if (!is_array($conversation_history)) {
	5583	+ $conversation_history = array();
	5584	+ }
	5585	+
	5586	+ // Format conversation history for X.AI (same as OpenAI format)
	5587	+ $formatted_conversation = array();
	5588	+
	5589	+ $formatted_conversation[] = array(
	5590	+ 'role' => 'system',
	5591	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	5592	+ );
	5593	+
	5594	+ foreach ($conversation_history as $message) {
	5595	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	5596	+ $role = $message['role'];
	5597	+ if ($role === 'bot' || $role === 'agent') {
	5598	+ $role = 'assistant';
	5599	+ }
	5600	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	5601	+ $role = 'user';
	5602	+ }
	5603	+ $formatted_conversation[] = array(
	5604	+ 'role' => $role,
	5605	+ 'content' => $message['content']
	5606	+ );
	5607	+ }
	5608	+ }
	5609	+
	5610	+ // Check if we can actually stream
	5611	+ if (headers_sent() || !function_exists('curl_init')) {
	5612	+ // Fallback to regular response with testing data
	5613	+ //error_log("MxChat: X.AI streaming not possible, falling back to regular response");
	5614	+ $regular_response = $this->mxchat_generate_response_xai(
	5615	+ $selected_model,
	5616	+ $xai_api_key,
	5617	+ $conversation_history,
	5618	+ $relevant_content
	5619	+ );
	5620	+
	5621	+ $response_data = [
	5622	+ 'text' => $regular_response,
	5623	+ 'html' => '',
	5624	+ 'session_id' => $session_id
	5625	+ ];
	5626	+
	5627	+ if ($testing_data !== null) {
	5628	+ $response_data['testing_data'] = $testing_data;
	5629	+ //error_log("MxChat Testing: Added testing data to X.AI fallback response");
	5630	+ }
	5631	+
	5632	+ header('Content-Type: application/json');
	5633	+ echo json_encode($response_data);
	5634	+ return true;
	5635	+ }
	5636	+
	5637	+ // Prepare the request body with stream: true
	5638	+ $body = json_encode([
	5639	+ 'model' => $selected_model,
	5640	+ 'messages' => $formatted_conversation,
	5641	+ 'temperature' => 0.8,
	5642	+ 'stream' => true
	5643	+ ]);
	5644	+
	5645	+ // Use cURL for streaming support
	5646	+ $ch = curl_init();
	5647	+ curl_setopt($ch, CURLOPT_URL, 'https://api.x.ai/v1/chat/completions');
	5648	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
	5649	+ curl_setopt($ch, CURLOPT_POST, true);
	5650	+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	5651	+ curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	5652	+ 'Content-Type: application/json',
	5653	+ 'Authorization: Bearer ' . $xai_api_key
	5654	+ ));
	5655	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	5656	+ curl_setopt($ch, CURLOPT_TIMEOUT, 60);
	5657	+
	5658	+ $full_response = ''; // Accumulate full response for saving
	5659	+ $stream_started = false;
	5660	+ $buffer = ''; // CRITICAL: Add persistent buffer for incomplete chunks
	5661	+
	5662	+ // Buffer control for real-time streaming
	5663	+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use (&$full_response, &$stream_started, &$buffer, $testing_data) {
	5664	+ // Send testing data as the first event if available
	5665	+ if (!$stream_started && $testing_data !== null) {
	5666	+ echo "data: " . json_encode(['testing_data' => $testing_data]) . "\n\n";
	5667	+ flush();
	5668	+ $stream_started = true;
	5669	+ //error_log("MxChat Testing: Sent testing data in X.AI stream");
	5670	+ }
	5671	+
	5672	+ // CRITICAL FIX: Append new data to buffer
	5673	+ $buffer .= $data;
	5674	+
	5675	+ // Process complete lines only
	5676	+ $lines = explode("\n", $buffer);
	5677	+
	5678	+ // CRITICAL FIX: Keep the last incomplete line in the buffer
	5679	+ // The last element might be incomplete, so keep it in buffer
	5680	+ $buffer = array_pop($lines);
	5681	+
	5682	+ foreach ($lines as $line) {
	5683	+ // Skip empty lines
	5684	+ if (trim($line) === '') {
	5685	+ continue;
	5686	+ }
	5687	+
	5688	+ // Only process lines that start with "data: "
	5689	+ if (strpos($line, 'data: ') !== 0) {
	5690	+ continue;
	5691	+ }
	5692	+
	5693	+ $json_str = substr($line, 6); // Remove 'data: ' prefix
	5694	+
	5695	+ if (trim($json_str) === '[DONE]') {
	5696	+ echo "data: [DONE]\n\n";
	5697	+ flush();
	5698	+ continue;
	5699	+ }
	5700	+
	5701	+ // Try to decode JSON
	5702	+ $json = json_decode(trim($json_str), true);
	5703	+ if ($json && isset($json['choices'][0]['delta']['content'])) {
	5704	+ $content = $json['choices'][0]['delta']['content'];
	5705	+ $full_response .= $content; // Accumulate
	5706	+ // Send as SSE format
	5707	+ echo "data: " . json_encode(['content' => $content]) . "\n\n";
	5708	+ flush();
	5709	+ }
	5710	+ }
	5711	+
	5712	+ return strlen($data);
	5713	+ });
	5714	+
	5715	+ $response = curl_exec($ch);
	5716	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	5717	+
	5718	+ if (curl_errno($ch) || $http_code !== 200) {
	5719	+ curl_close($ch);
	5720	+
	5721	+ // Fallback to regular response
	5722	+ //error_log("MxChat: X.AI streaming failed, falling back");
	5723	+ $regular_response = $this->mxchat_generate_response_xai(
	5724	+ $selected_model,
	5725	+ $xai_api_key,
	5726	+ $conversation_history,
	5727	+ $relevant_content
	5728	+ );
	5729	+
	5730	+ $response_data = [
	5731	+ 'text' => $regular_response,
	5732	+ 'html' => '',
	5733	+ 'session_id' => $session_id
	5734	+ ];
	5735	+
	5736	+ if ($testing_data !== null) {
	5737	+ $response_data['testing_data'] = $testing_data;
	5738	+ //error_log("MxChat Testing: Added testing data to X.AI error fallback");
	5739	+ }
	5740	+
	5741	+ header('Content-Type: application/json');
	5742	+ echo json_encode($response_data);
	5743	+ return true;
	5744	+ }
	5745	+
	5746	+ curl_close($ch);
	5747	+
	5748	+ // Save the complete response to maintain chat persistence
	5749	+ if (!empty($full_response) && !empty($session_id)) {
	5750	+ $this->mxchat_save_chat_message($session_id, 'bot', $full_response);
	5751	+ }
	5752	+
	5753	+ return true; // Indicate streaming completed successfully
	5754	+
	5755	+ } catch (Exception $e) {
	5756	+ //error_log("MxChat X.AI streaming exception: " . $e->getMessage());
	5757	+
	5758	+ // Fallback to regular response
	5759	+ $regular_response = $this->mxchat_generate_response_xai(
	5760	+ $selected_model,
	5761	+ $xai_api_key,
	5762	+ $conversation_history,
	5763	+ $relevant_content
	5764	+ );
	5765	+
	5766	+ $response_data = [
	5767	+ 'text' => $regular_response,
	5768	+ 'html' => '',
	5769	+ 'session_id' => $session_id
	5770	+ ];
	5771	+
	5772	+ if ($testing_data !== null) {
	5773	+ $response_data['testing_data'] = $testing_data;
	5774	+ //error_log("MxChat Testing: Added testing data to X.AI exception fallback");
	5775	+ }
	5776	+
	5777	+ header('Content-Type: application/json');
	5778	+ echo json_encode($response_data);
	5779	+ return true;
	5780	+ }
	5781	+}
	5782	+private function mxchat_generate_response_deepseek_stream($selected_model, $deepseek_api_key, $conversation_history, $relevant_content, $session_id, $testing_data = null) {
	5783	+ try {
	5784	+ // Get bot ID from session or request
	5785	+ $bot_id = $this->get_current_bot_id($session_id);
	5786	+
	5787	+ // Get system prompt instructions using centralized function
	5788	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	5789	+
	5790	+ // Ensure conversation_history is an array
	5791	+ if (!is_array($conversation_history)) {
	5792	+ $conversation_history = array();
	5793	+ }
	5794	+
	5795	+ // Format conversation history for DeepSeek
	5796	+ $formatted_conversation = array();
	5797	+
	5798	+ $formatted_conversation[] = array(
	5799	+ 'role' => 'system',
	5800	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	5801	+ );
	5802	+
	5803	+ foreach ($conversation_history as $message) {
	5804	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	5805	+ $role = $message['role'];
	5806	+ if ($role === 'bot' || $role === 'agent') {
	5807	+ $role = 'assistant';
	5808	+ }
	5809	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	5810	+ $role = 'user';
	5811	+ }
	5812	+ $formatted_conversation[] = array(
	5813	+ 'role' => $role,
	5814	+ 'content' => $message['content']
	5815	+ );
	5816	+ }
	5817	+ }
	5818	+
	5819	+ // Check if we can actually stream
	5820	+ if (headers_sent() || !function_exists('curl_init')) {
	5821	+ // Fallback to regular response with testing data
	5822	+ //error_log("MxChat: DeepSeek streaming not possible, falling back to regular response");
	5823	+ $regular_response = $this->mxchat_generate_response_deepseek(
	5824	+ $selected_model,
	5825	+ $deepseek_api_key,
	5826	+ $conversation_history,
	5827	+ $relevant_content
	5828	+ );
	5829	+
	5830	+ $response_data = [
	5831	+ 'text' => $regular_response,
	5832	+ 'html' => '',
	5833	+ 'session_id' => $session_id
	5834	+ ];
	5835	+
	5836	+ if ($testing_data !== null) {
	5837	+ $response_data['testing_data'] = $testing_data;
	5838	+ //error_log("MxChat Testing: Added testing data to DeepSeek fallback response");
	5839	+ }
	5840	+
	5841	+ header('Content-Type: application/json');
	5842	+ echo json_encode($response_data);
	5843	+ return true;
	5844	+ }
	5845	+
	5846	+ // Prepare the request body with stream: true
	5847	+ $body = json_encode([
	5848	+ 'model' => $selected_model,
	5849	+ 'messages' => $formatted_conversation,
	5850	+ 'temperature' => 0.8,
	5851	+ 'stream' => true
	5852	+ ]);
	5853	+
	5854	+ // Use cURL for streaming support
	5855	+ $ch = curl_init();
	5856	+ curl_setopt($ch, CURLOPT_URL, 'https://api.deepseek.com/v1/chat/completions');
	5857	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
	5858	+ curl_setopt($ch, CURLOPT_POST, true);
	5859	+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	5860	+ curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	5861	+ 'Content-Type: application/json',
	5862	+ 'Authorization: Bearer ' . $deepseek_api_key
	5863	+ ));
	5864	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	5865	+ curl_setopt($ch, CURLOPT_TIMEOUT, 60);
	5866	+
	5867	+ $full_response = ''; // Accumulate full response for saving
	5868	+ $stream_started = false;
	5869	+ $buffer = ''; // CRITICAL: Add persistent buffer for incomplete chunks
	5870	+
	5871	+ // Buffer control for real-time streaming
	5872	+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use (&$full_response, &$stream_started, &$buffer, $testing_data) {
	5873	+ // Send testing data as the first event if available
	5874	+ if (!$stream_started && $testing_data !== null) {
	5875	+ echo "data: " . json_encode(['testing_data' => $testing_data]) . "\n\n";
	5876	+ flush();
	5877	+ $stream_started = true;
	5878	+ //error_log("MxChat Testing: Sent testing data in DeepSeek stream");
	5879	+ }
	5880	+
	5881	+ // CRITICAL FIX: Append new data to buffer
	5882	+ $buffer .= $data;
	5883	+
	5884	+ // Process complete lines only
	5885	+ $lines = explode("\n", $buffer);
	5886	+
	5887	+ // CRITICAL FIX: Keep the last incomplete line in the buffer
	5888	+ // The last element might be incomplete, so keep it in buffer
	5889	+ $buffer = array_pop($lines);
	5890	+
	5891	+ foreach ($lines as $line) {
	5892	+ // Skip empty lines
	5893	+ if (trim($line) === '') {
	5894	+ continue;
	5895	+ }
	5896	+
	5897	+ // Only process lines that start with "data: "
	5898	+ if (strpos($line, 'data: ') !== 0) {
	5899	+ continue;
	5900	+ }
	5901	+
	5902	+ $json_str = substr($line, 6); // Remove 'data: ' prefix
	5903	+
	5904	+ if (trim($json_str) === '[DONE]') {
	5905	+ echo "data: [DONE]\n\n";
	5906	+ flush();
	5907	+ continue;
	5908	+ }
	5909	+
	5910	+ // Try to decode JSON
	5911	+ $json = json_decode(trim($json_str), true);
	5912	+ if ($json && isset($json['choices'][0]['delta']['content'])) {
	5913	+ $content = $json['choices'][0]['delta']['content'];
	5914	+ $full_response .= $content; // Accumulate the full response
	5915	+
	5916	+ // Send as SSE format
	5917	+ echo "data: " . json_encode(['content' => $content]) . "\n\n";
	5918	+ flush();
	5919	+ }
	5920	+ }
	5921	+
	5922	+ return strlen($data);
	5923	+ });
	5924	+
	5925	+ $response = curl_exec($ch);
	5926	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	5927	+
	5928	+ if (curl_errno($ch) || $http_code !== 200) {
	5929	+ $curl_error = curl_error($ch);
	5930	+ curl_close($ch);
	5931	+
	5932	+ // Log the specific error for debugging
	5933	+ //error_log("MxChat: DeepSeek streaming failed - HTTP: $http_code, cURL: $curl_error");
	5934	+
	5935	+ // Fallback to regular response
	5936	+ $regular_response = $this->mxchat_generate_response_deepseek(
	5937	+ $selected_model,
	5938	+ $deepseek_api_key,
	5939	+ $conversation_history,
	5940	+ $relevant_content
	5941	+ );
	5942	+
	5943	+ // Handle error response from regular function
	5944	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5945	+ if ($testing_data !== null) {
	5946	+ $regular_response['testing_data'] = $testing_data;
	5947	+ }
	5948	+ header('Content-Type: application/json');
	5949	+ echo json_encode($regular_response);
	5950	+ return true;
	5951	+ }
	5952	+
	5953	+ $response_data = [
	5954	+ 'text' => $regular_response,
	5955	+ 'html' => '',
	5956	+ 'session_id' => $session_id
	5957	+ ];
	5958	+
	5959	+ if ($testing_data !== null) {
	5960	+ $response_data['testing_data'] = $testing_data;
	5961	+ //error_log("MxChat Testing: Added testing data to DeepSeek error fallback");
	5962	+ }
	5963	+
	5964	+ header('Content-Type: application/json');
	5965	+ echo json_encode($response_data);
	5966	+ return true;
	5967	+ }
	5968	+
	5969	+ curl_close($ch);
	5970	+
	5971	+ // Save the complete response to maintain chat persistence
	5972	+ if (!empty($full_response) && !empty($session_id)) {
	5973	+ $this->mxchat_save_chat_message($session_id, 'bot', $full_response);
	5974	+ }
	5975	+
	5976	+ return true; // Indicate streaming completed successfully
	5977	+
	5978	+ } catch (Exception $e) {
	5979	+ //error_log("MxChat DeepSeek streaming exception: " . $e->getMessage());
	5980	+
	5981	+ // Fallback to regular response
	5982	+ $regular_response = $this->mxchat_generate_response_deepseek(
	5983	+ $selected_model,
	5984	+ $deepseek_api_key,
	5985	+ $conversation_history,
	5986	+ $relevant_content
	5987	+ );
	5988	+
	5989	+ // Handle error response from regular function
	5990	+ if (is_array($regular_response) && isset($regular_response['error'])) {
	5991	+ if ($testing_data !== null) {
	5992	+ $regular_response['testing_data'] = $testing_data;
	5993	+ }
	5994	+ header('Content-Type: application/json');
	5995	+ echo json_encode($regular_response);
	5996	+ return true;
	5997	+ }
	5998	+
	5999	+ $response_data = [
	6000	+ 'text' => $regular_response,
	6001	+ 'html' => '',
	6002	+ 'session_id' => $session_id
	6003	+ ];
	6004	+
	6005	+ if ($testing_data !== null) {
	6006	+ $response_data['testing_data'] = $testing_data;
	6007	+ //error_log("MxChat Testing: Added testing data to DeepSeek exception fallback");
	6008	+ }
	6009	+
	6010	+ header('Content-Type: application/json');
	6011	+ echo json_encode($response_data);
	6012	+ return true;
	6013	+ }
	6014	+}
	6015	+
	6016	+
	6017	+private function mxchat_generate_response_openrouter($selected_model, $openrouter_api_key, $conversation_history, $relevant_content) {
	6018	+ try {
	6019	+ if (!is_array($conversation_history)) {
	6020	+ $conversation_history = array();
	6021	+ }
	6022	+
	6023	+ $bot_id = $this->get_current_bot_id('');
	6024	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6025	+
	6026	+ $formatted_conversation = array();
	6027	+
	6028	+ $formatted_conversation[] = array(
	6029	+ 'role' => 'system',
	6030	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	6031	+ );
	6032	+
	6033	+ foreach ($conversation_history as $message) {
	6034	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	6035	+ $role = $message['role'];
	6036	+
	6037	+ if ($role === 'bot' || $role === 'agent') {
	6038	+ $role = 'assistant';
	6039	+ }
	6040	+ if (!in_array($role, ['system', 'assistant', 'user'])) {
	6041	+ $role = 'user';
	6042	+ }
	6043	+
	6044	+ $formatted_conversation[] = array(
	6045	+ 'role' => $role,
	6046	+ 'content' => $message['content']
	6047	+ );
	6048	+ }
	6049	+ }
	6050	+
	6051	+ $body = json_encode([
	6052	+ 'model' => $selected_model,
	6053	+ 'messages' => $formatted_conversation,
	6054	+ 'temperature' => 1,
	6055	+ ]);
	6056	+
	6057	+ $args = [
	6058	+ 'body' => $body,
	6059	+ 'headers' => [
	6060	+ 'Content-Type' => 'application/json',
	6061	+ 'Authorization' => 'Bearer ' . $openrouter_api_key,
	6062	+ 'HTTP-Referer' => home_url(),
	6063	+ 'X-Title' => get_bloginfo('name'),
	6064	+ ],
	6065	+ 'timeout' => 60,
	6066	+ 'redirection' => 5,
	6067	+ 'blocking' => true,
	6068	+ 'httpversion' => '1.0',
	6069	+ 'sslverify' => true,
	6070	+ ];
	6071	+
	6072	+ $response = wp_remote_post('https://openrouter.ai/api/v1/chat/completions', $args);
	6073	+
	6074	+ if (is_wp_error($response)) {
	6075	+ $error_message = $response->get_error_message();
	6076	+ return [
	6077	+ 'error' => esc_html__('Connection error when contacting OpenRouter: ', 'mxchat') . esc_html($error_message),
	6078	+ 'error_code' => 'openrouter_connection_error',
	6079	+ 'provider' => 'openrouter'
	6080	+ ];
	6081	+ }
	6082	+
	6083	+ $status_code = wp_remote_retrieve_response_code($response);
	6084	+ if ($status_code !== 200) {
	6085	+ $response_body = wp_remote_retrieve_body($response);
	6086	+ $decoded_response = json_decode($response_body, true);
	6087	+
	6088	+ $error_message = isset($decoded_response['error']['message'])
	6089	+ ? $decoded_response['error']['message']
	6090	+ : 'HTTP Error ' . $status_code;
	6091	+
	6092	+ return [
	6093	+ 'error' => esc_html__('OpenRouter API error: ', 'mxchat') . esc_html($error_message),
	6094	+ 'error_code' => 'openrouter_api_error',
	6095	+ 'provider' => 'openrouter',
	6096	+ 'status_code' => $status_code
	6097	+ ];
	6098	+ }
	6099	+
	6100	+ $response_body = wp_remote_retrieve_body($response);
	6101	+ $decoded_response = json_decode($response_body, true);
	6102	+
	6103	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	6104	+ return trim($decoded_response['choices'][0]['message']['content']);
	6105	+ } else {
	6106	+ return [
	6107	+ 'error' => esc_html__('Unexpected response format from OpenRouter.', 'mxchat'),
	6108	+ 'error_code' => 'openrouter_response_format_error',
	6109	+ 'provider' => 'openrouter'
	6110	+ ];
	6111	+ }
	6112	+ } catch (Exception $e) {
	6113	+ return [
	6114	+ 'error' => esc_html__('System error when processing OpenRouter request: ', 'mxchat') . esc_html($e->getMessage()),
	6115	+ 'error_code' => 'openrouter_exception',
	6116	+ 'provider' => 'openrouter'
	6117	+ ];
	6118	+ }
	6119	+}
	6120	+private function mxchat_generate_response_claude($selected_model, $claude_api_key, $conversation_history, $relevant_content) {
	6121	+
	6122	+ // Get bot ID from session or request
	6123	+ $bot_id = $this->get_current_bot_id($session_id);
	6124	+
	6125	+ // Get system prompt instructions using centralized function
	6126	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6127	+
	6128	+ // Clean and validate conversation history
	6129	+ foreach ($conversation_history as &$message) {
	6130	+ // Convert bot and agent roles to assistant
	6131	+ if ($message['role'] === 'bot' || $message['role'] === 'agent') {
	6132	+ $message['role'] = 'assistant';
	6133	+ }
	6134	+
	6135	+ // Remove unsupported roles - Claude only supports 'assistant' and 'user'
	6136	+ if (!in_array($message['role'], ['assistant', 'user'])) {
	6137	+ $message['role'] = 'user';
	6138	+ }
	6139	+
	6140	+ // Ensure content field exists
	6141	+ if (!isset($message['content']) || empty($message['content'])) {
	6142	+ $message['content'] = '';
	6143	+ }
	6144	+
	6145	+ // Remove any unsupported fields
	6146	+ $message = array_intersect_key($message, array_flip(['role', 'content']));
	6147	+ }
	6148	+
	6149	+ // Add relevant content as the latest user message
	6150	+ $conversation_history[] = [
	6151	+ 'role' => 'user',
	6152	+ 'content' => $relevant_content
	6153	+ ];
	6154	+
	6155	+ // Build request body
	6156	+ $body = json_encode([
	6157	+ 'model' => $selected_model,
	6158	+ 'max_tokens' => 1000,
	6159	+ 'temperature' => 0.8,
	6160	+ 'messages' => $conversation_history,
	6161	+ 'system' => $system_prompt_instructions
	6162	+ ]);
	6163	+
	6164	+ // Set up API request
	6165	+ $args = [
	6166	+ 'body' => $body,
	6167	+ 'headers' => [
	6168	+ 'Content-Type' => 'application/json',
	6169	+ 'x-api-key' => $claude_api_key,
	6170	+ 'anthropic-version' => '2023-06-01'
	6171	+ ],
	6172	+ 'timeout' => 60,
	6173	+ 'redirection' => 5,
	6174	+ 'blocking' => true,
	6175	+ 'httpversion' => '1.0',
	6176	+ 'sslverify' => true,
	6177	+ ];
	6178	+
	6179	+ // Make API request
	6180	+ $response = wp_remote_post('https://api.anthropic.com/v1/messages', $args);
	6181	+
	6182	+ // Check for WordPress errors
	6183	+ if (is_wp_error($response)) {
	6184	+ //error_log("Claude API request error: " . $response->get_error_message());
	6185	+ return "Sorry, there was an error connecting to the API.";
	6186	+ }
	6187	+
	6188	+ // Check HTTP response code
	6189	+ $http_code = wp_remote_retrieve_response_code($response);
	6190	+ if ($http_code !== 200) {
	6191	+ $error_body = wp_remote_retrieve_body($response);
	6192	+ //error_log("Claude API HTTP error: " . $http_code . " - " . $error_body);
	6193	+
	6194	+ // Try to extract error message from response
	6195	+ $error_data = json_decode($error_body, true);
	6196	+ $error_message = isset($error_data['error']['message']) ?
	6197	+ $error_data['error']['message'] :
	6198	+ "HTTP error " . $http_code;
	6199	+
	6200	+ return "Sorry, the API returned an error: " . $error_message;
	6201	+ }
	6202	+
	6203	+ // Parse response
	6204	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	6205	+
	6206	+ // Check for JSON decode errors
	6207	+ if (json_last_error() !== JSON_ERROR_NONE) {
	6208	+ //error_log("Claude API JSON decode error: " . json_last_error_msg());
	6209	+ return "Sorry, there was an error processing the API response.";
	6210	+ }
	6211	+
	6212	+ // Extract and validate response content
	6213	+ if (isset($response_body['content']) &&
	6214	+ is_array($response_body['content']) &&
	6215	+ !empty($response_body['content']) &&
	6216	+ isset($response_body['content'][0]['text'])) {
	6217	+ return trim($response_body['content'][0]['text']);
	6218	+ }
	6219	+
	6220	+ // Log unexpected response format
	6221	+ //error_log("Claude API unexpected response format: " . print_r($response_body, true));
	6222	+ return "Sorry, I received an unexpected response format from the API.";
	6223	+}
	6224	+private function mxchat_generate_response_openai($selected_model, $api_key, $conversation_history, $relevant_content) {
	6225	+ try {
	6226	+ // Ensure conversation_history is an array
	6227	+ if (!is_array($conversation_history)) {
	6228	+ $conversation_history = array();
	6229	+ }
	6230	+
	6231	+ // Get bot ID from session or request
	6232	+ $bot_id = $this->get_current_bot_id('');
	6233	+
	6234	+ // Get system prompt instructions using centralized function
	6235	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6236	+
	6237	+ // Create a new array for the formatted conversation
	6238	+ $formatted_conversation = array();
	6239	+
	6240	+ // Add system message first
	6241	+ $formatted_conversation[] = array(
	6242	+ 'role' => 'system',
	6243	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	6244	+ );
	6245	+
	6246	+ // Add the rest of the conversation history
	6247	+ foreach ($conversation_history as $message) {
	6248	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	6249	+ $role = $message['role'];
	6250	+
	6251	+ // Convert roles to supported format
	6252	+ if ($role === 'bot' || $role === 'agent') {
	6253	+ $role = 'assistant';
	6254	+ }
	6255	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	6256	+ $role = 'user';
	6257	+ }
	6258	+
	6259	+ $formatted_conversation[] = array(
	6260	+ 'role' => $role,
	6261	+ 'content' => $message['content']
	6262	+ );
	6263	+ }
	6264	+ }
	6265	+
	6266	+ // Check if this is a GPT-5 model (supports reasoning_effort parameter)
	6267	+ $is_gpt5_model = (
	6268	+ strpos($selected_model, 'gpt-5') === 0 ||
	6269	+ $selected_model === 'gpt-5.1-2025-11-13' ||
	6270	+ $selected_model === 'gpt-5' ||
	6271	+ $selected_model === 'gpt-5-mini' ||
	6272	+ $selected_model === 'gpt-5-nano'
	6273	+ );
	6274	+
	6275	+ // Build request body with optimal settings for fast responses
	6276	+ $request_body = [
	6277	+ 'model' => $selected_model,
	6278	+ 'messages' => $formatted_conversation,
	6279	+ 'temperature' => 1,
	6280	+ 'stream' => false
	6281	+ ];
	6282	+
	6283	+ // Add reasoning_effort only for GPT-5 models
	6284	+ if ($is_gpt5_model) {
	6285	+ // GPT-5.1 uses 'low' instead of 'minimal'
	6286	+ if ($selected_model === 'gpt-5.1-2025-11-13') {
	6287	+ $request_body['reasoning_effort'] = 'low';
	6288	+ } else {
	6289	+ $request_body['reasoning_effort'] = 'minimal'; // For other GPT-5 models
	6290	+ }
	6291	+ }
	6292	+
	6293	+ $body = json_encode($request_body);
	6294	+
	6295	+ $args = [
	6296	+ 'body' => $body,
	6297	+ 'headers' => [
	6298	+ 'Content-Type' => 'application/json',
	6299	+ 'Authorization' => 'Bearer ' . $api_key,
	6300	+ ],
	6301	+ 'timeout' => 60,
	6302	+ 'redirection' => 5,
	6303	+ 'blocking' => true,
	6304	+ 'httpversion' => '1.0',
	6305	+ 'sslverify' => true,
	6306	+ ];
	6307	+
	6308	+ $response = wp_remote_post('https://api.openai.com/v1/chat/completions', $args);
	6309	+
	6310	+ if (is_wp_error($response)) {
	6311	+ $error_message = $response->get_error_message();
	6312	+ return [
	6313	+ 'error' => esc_html__('Connection error when contacting OpenAI: ', 'mxchat') . esc_html($error_message),
	6314	+ 'error_code' => 'openai_connection_error',
	6315	+ 'provider' => 'openai'
	6316	+ ];
	6317	+ }
	6318	+
	6319	+ $status_code = wp_remote_retrieve_response_code($response);
	6320	+ if ($status_code !== 200) {
	6321	+ $response_body = wp_remote_retrieve_body($response);
	6322	+ $decoded_response = json_decode($response_body, true);
	6323	+
	6324	+ $error_message = isset($decoded_response['error']['message'])
	6325	+ ? $decoded_response['error']['message']
	6326	+ : 'HTTP Error ' . $status_code;
	6327	+
	6328	+ $error_type = isset($decoded_response['error']['type'])
	6329	+ ? $decoded_response['error']['type']
	6330	+ : 'unknown';
	6331	+
	6332	+ // Handle specific error types
	6333	+ switch ($error_type) {
	6334	+ case 'invalid_request_error':
	6335	+ if (strpos($error_message, 'API key') !== false) {
	6336	+ return [
	6337	+ 'error' => esc_html__('Invalid OpenAI API key. Please check your API key configuration.', 'mxchat'),
	6338	+ 'error_code' => 'openai_invalid_api_key',
	6339	+ 'provider' => 'openai'
	6340	+ ];
	6341	+ }
	6342	+ break;
	6343	+
	6344	+ case 'authentication_error':
	6345	+ return [
	6346	+ 'error' => esc_html__('Authentication failed with OpenAI. Please check your API key.', 'mxchat'),
	6347	+ 'error_code' => 'openai_auth_error',
	6348	+ 'provider' => 'openai'
	6349	+ ];
	6350	+
	6351	+ case 'rate_limit_exceeded':
	6352	+ return [
	6353	+ 'error' => esc_html__('OpenAI rate limit exceeded. Please try again later.', 'mxchat'),
	6354	+ 'error_code' => 'openai_rate_limit',
	6355	+ 'provider' => 'openai'
	6356	+ ];
	6357	+
	6358	+ case 'quota_exceeded':
	6359	+ return [
	6360	+ 'error' => esc_html__('OpenAI API quota exceeded. Please check your billing details.', 'mxchat'),
	6361	+ 'error_code' => 'openai_quota_exceeded',
	6362	+ 'provider' => 'openai'
	6363	+ ];
	6364	+ }
	6365	+
	6366	+ // Generic error fallback
	6367	+ return [
	6368	+ 'error' => esc_html__('OpenAI API error: ', 'mxchat') . esc_html($error_message),
	6369	+ 'error_code' => 'openai_api_error',
	6370	+ 'provider' => 'openai',
	6371	+ 'status_code' => $status_code
	6372	+ ];
	6373	+ }
	6374	+
	6375	+ $response_body = wp_remote_retrieve_body($response);
	6376	+ $decoded_response = json_decode($response_body, true);
	6377	+
	6378	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	6379	+ return trim($decoded_response['choices'][0]['message']['content']);
	6380	+ } else {
	6381	+ return [
	6382	+ 'error' => esc_html__('Unexpected response format from OpenAI.', 'mxchat'),
	6383	+ 'error_code' => 'openai_response_format_error',
	6384	+ 'provider' => 'openai'
	6385	+ ];
	6386	+ }
	6387	+ } catch (Exception $e) {
	6388	+ return [
	6389	+ 'error' => esc_html__('System error when processing OpenAI request: ', 'mxchat') . esc_html($e->getMessage()),
	6390	+ 'error_code' => 'openai_exception',
	6391	+ 'provider' => 'openai'
	6392	+ ];
	6393	+ }
	6394	+}
	6395	+
	6396	+private function mxchat_generate_response_xai($selected_model, $xai_api_key, $conversation_history, $relevant_content) {
	6397	+ try {
	6398	+ // Get bot ID from session or request
	6399	+ $bot_id = $this->get_current_bot_id($session_id);
	6400	+
	6401	+ // Get system prompt instructions using centralized function
	6402	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6403	+
	6404	+ // Add system prompt to relevant content
	6405	+ $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
	6406	+
	6407	+ // Prepend system instructions to the conversation history
	6408	+ array_unshift($conversation_history, [
	6409	+ 'role' => 'system',
	6410	+ 'content' => "Here are your instructions: " . $content_with_instructions
	6411	+ ]);
	6412	+
	6413	+ // Ensure consistency: Replace 'bot' and 'agent' roles with supported values
	6414	+ foreach ($conversation_history as &$message) {
	6415	+ if ($message['role'] === 'bot') {
	6416	+ $message['role'] = 'assistant';
	6417	+ } elseif ($message['role'] === 'agent') {
	6418	+ // Tag the message as coming from a live agent
	6419	+ $message['role'] = 'assistant';
	6420	+ if (!isset($message['metadata'])) {
	6421	+ $message['metadata'] = ['source' => 'live_agent'];
	6422	+ }
	6423	+ }
	6424	+
	6425	+ // Ensure all roles are valid
	6426	+ if (!in_array($message['role'], ['system', 'assistant', 'user', 'function', 'tool'])) {
	6427	+ $message['role'] = 'user'; // Default to 'user'
	6428	+ }
	6429	+ }
	6430	+
	6431	+ // Build the request body
	6432	+ $body = json_encode([
	6433	+ 'model' => $selected_model,
	6434	+ 'messages' => $conversation_history,
	6435	+ 'temperature' => 0.8,
	6436	+ 'stream' => false
	6437	+ ]);
	6438	+
	6439	+ // Set up the API request
	6440	+ $args = [
	6441	+ 'body' => $body,
	6442	+ 'headers' => [
	6443	+ 'Content-Type' => 'application/json',
	6444	+ 'Authorization' => 'Bearer ' . $xai_api_key,
	6445	+ ],
	6446	+ 'timeout' => 60,
	6447	+ 'redirection' => 5,
	6448	+ 'blocking' => true,
	6449	+ 'httpversion' => '1.0',
	6450	+ 'sslverify' => true,
	6451	+ ];
	6452	+
	6453	+ // Make the API request
	6454	+ $response = wp_remote_post('https://api.x.ai/v1/chat/completions', $args);
	6455	+
	6456	+ // Process the response
	6457	+ if (is_wp_error($response)) {
	6458	+ $error_message = $response->get_error_message();
	6459	+ //error_log('X.AI API Error: ' . $error_message);
	6460	+ return [
	6461	+ 'error' => esc_html__('Connection error when contacting X.AI: ', 'mxchat') . esc_html($error_message),
	6462	+ 'error_code' => 'xai_connection_error',
	6463	+ 'provider' => 'xai'
	6464	+ ];
	6465	+ }
	6466	+
	6467	+ $status_code = wp_remote_retrieve_response_code($response);
	6468	+ if ($status_code !== 200) {
	6469	+ $response_body = wp_remote_retrieve_body($response);
	6470	+ $decoded_response = json_decode($response_body, true);
	6471	+
	6472	+ // Log the full response for debugging
	6473	+ //error_log('X.AI Error Response: ' . print_r($decoded_response, true));
	6474	+
	6475	+ // Extract error message from X.AI's specific format
	6476	+ $error_message = '';
	6477	+
	6478	+ // Check for direct error string (as seen in your logs)
	6479	+ if (isset($decoded_response['error']) && is_string($decoded_response['error'])) {
	6480	+ $error_message = $decoded_response['error'];
	6481	+ }
	6482	+ // Check for nested error object (OpenAI style)
	6483	+ elseif (isset($decoded_response['error']['message'])) {
	6484	+ $error_message = $decoded_response['error']['message'];
	6485	+ }
	6486	+ // Check for top-level message
	6487	+ elseif (isset($decoded_response['message'])) {
	6488	+ $error_message = $decoded_response['message'];
	6489	+ }
	6490	+ // Fallback
	6491	+ else {
	6492	+ $error_message = 'HTTP Error ' . $status_code;
	6493	+ }
	6494	+
	6495	+ //error_log('X.AI API HTTP Error: ' . $status_code . ' - ' . $error_message);
	6496	+
	6497	+ // Check for API key errors using string matching
	6498	+ if (stripos($error_message, 'api key') !== false ||
	6499	+ stripos($error_message, 'incorrect api key') !== false ||
	6500	+ stripos($error_message, 'invalid api key') !== false) {
	6501	+ return [
	6502	+ 'error' => esc_html__('Invalid X.AI API key. Please check your API key configuration.', 'mxchat'),
	6503	+ 'error_code' => 'xai_invalid_api_key',
	6504	+ 'provider' => 'xai'
	6505	+ ];
	6506	+ }
	6507	+
	6508	+ // Authentication errors
	6509	+ if ($status_code === 401 || $status_code === 403 ||
	6510	+ stripos($error_message, 'auth') !== false) {
	6511	+ return [
	6512	+ 'error' => esc_html__('Authentication failed with X.AI. Please check your API key.', 'mxchat'),
	6513	+ 'error_code' => 'xai_auth_error',
	6514	+ 'provider' => 'xai'
	6515	+ ];
	6516	+ }
	6517	+
	6518	+ // Model errors
	6519	+ if (stripos($error_message, 'model') !== false) {
	6520	+ return [
	6521	+ 'error' => esc_html__('Invalid model specified for X.AI. Please check your model configuration.', 'mxchat'),
	6522	+ 'error_code' => 'xai_invalid_model',
	6523	+ 'provider' => 'xai'
	6524	+ ];
	6525	+ }
	6526	+
	6527	+ // Rate limit errors
	6528	+ if ($status_code === 429 ||
	6529	+ stripos($error_message, 'rate') !== false ||
	6530	+ stripos($error_message, 'limit') !== false) {
	6531	+ return [
	6532	+ 'error' => esc_html__('X.AI rate limit exceeded. Please try again later.', 'mxchat'),
	6533	+ 'error_code' => 'xai_rate_limit',
	6534	+ 'provider' => 'xai'
	6535	+ ];
	6536	+ }
	6537	+
	6538	+ // Quota errors
	6539	+ if (stripos($error_message, 'quota') !== false ||
	6540	+ stripos($error_message, 'billing') !== false) {
	6541	+ return [
	6542	+ 'error' => esc_html__('X.AI API quota exceeded. Please check your billing details.', 'mxchat'),
	6543	+ 'error_code' => 'xai_quota_exceeded',
	6544	+ 'provider' => 'xai'
	6545	+ ];
	6546	+ }
	6547	+
	6548	+ // Server errors
	6549	+ if ($status_code >= 500) {
	6550	+ return [
	6551	+ 'error' => esc_html__('X.AI service is currently unavailable. Please try again later.', 'mxchat'),
	6552	+ 'error_code' => 'xai_service_unavailable',
	6553	+ 'provider' => 'xai'
	6554	+ ];
	6555	+ }
	6556	+
	6557	+ // Generic error fallback with the actual error message
	6558	+ return [
	6559	+ 'error' => esc_html__('X.AI API error: ', 'mxchat') . esc_html($error_message),
	6560	+ 'error_code' => 'xai_api_error',
	6561	+ 'provider' => 'xai',
	6562	+ 'status_code' => $status_code
	6563	+ ];
	6564	+ }
	6565	+
	6566	+ $response_body = wp_remote_retrieve_body($response);
	6567	+ $decoded_response = json_decode($response_body, true);
	6568	+
	6569	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	6570	+ return trim($decoded_response['choices'][0]['message']['content']);
	6571	+ } else {
	6572	+ //error_log('X.AI API Response Format Error: ' . print_r($decoded_response, true));
	6573	+ return [
	6574	+ 'error' => esc_html__('Unexpected response format from X.AI.', 'mxchat'),
	6575	+ 'error_code' => 'xai_response_format_error',
	6576	+ 'provider' => 'xai'
	6577	+ ];
	6578	+ }
	6579	+} catch (Exception $e) {
	6580	+ //error_log('X.AI Exception: ' . $e->getMessage());
	6581	+ return [
	6582	+ 'error' => esc_html__('System error when processing X.AI request: ', 'mxchat') . esc_html($e->getMessage()),
	6583	+ 'error_code' => 'xai_exception',
	6584	+ 'provider' => 'xai'
	6585	+ ];
	6586	+}
	6587	+
	6588	+
	6589	+}
	6590	+private function mxchat_generate_response_deepseek($selected_model, $deepseek_api_key, $conversation_history, $relevant_content) {
	6591	+ try {
	6592	+ // Ensure conversation_history is an array
	6593	+ if (!is_array($conversation_history)) {
	6594	+ $conversation_history = array();
	6595	+ }
	6596	+
	6597	+ // Get bot ID from session or request
	6598	+ $bot_id = $this->get_current_bot_id($session_id);
	6599	+
	6600	+ // Get system prompt instructions using centralized function
	6601	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6602	+
	6603	+ // Create a new array for the formatted conversation
	6604	+ $formatted_conversation = array();
	6605	+
	6606	+ // Add system message first
	6607	+ $formatted_conversation[] = array(
	6608	+ 'role' => 'system',
	6609	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	6610	+ );
	6611	+
	6612	+ // Add the rest of the conversation history
	6613	+ foreach ($conversation_history as $message) {
	6614	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	6615	+ $role = $message['role'];
	6616	+
	6617	+ // Convert roles to supported format
	6618	+ if ($role === 'bot' || $role === 'agent') {
	6619	+ $role = 'assistant';
	6620	+ }
	6621	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	6622	+ $role = 'user';
	6623	+ }
	6624	+
	6625	+ $formatted_conversation[] = array(
	6626	+ 'role' => $role,
	6627	+ 'content' => $message['content']
	6628	+ );
	6629	+ }
	6630	+ }
	6631	+
	6632	+ $body = json_encode([
	6633	+ 'model' => $selected_model,
	6634	+ 'messages' => $formatted_conversation,
	6635	+ 'temperature' => 0.8,
	6636	+ 'stream' => false
	6637	+ ]);
	6638	+
	6639	+ $args = [
	6640	+ 'body' => $body,
	6641	+ 'headers' => [
	6642	+ 'Content-Type' => 'application/json',
	6643	+ 'Authorization' => 'Bearer ' . $deepseek_api_key,
	6644	+ ],
	6645	+ 'timeout' => 60,
	6646	+ 'redirection' => 5,
	6647	+ 'blocking' => true,
	6648	+ 'httpversion' => '1.0',
	6649	+ 'sslverify' => true,
	6650	+ ];
	6651	+
	6652	+ $response = wp_remote_post('https://api.deepseek.com/v1/chat/completions', $args);
	6653	+
	6654	+ if (is_wp_error($response)) {
	6655	+ $error_message = $response->get_error_message();
	6656	+ //error_log('DeepSeek API Error: ' . $error_message);
	6657	+ return [
	6658	+ 'error' => esc_html__('Connection error when contacting DeepSeek: ', 'mxchat') . esc_html($error_message),
	6659	+ 'error_code' => 'deepseek_connection_error',
	6660	+ 'provider' => 'deepseek'
	6661	+ ];
	6662	+ }
	6663	+
	6664	+ $status_code = wp_remote_retrieve_response_code($response);
	6665	+ if ($status_code !== 200) {
	6666	+ $response_body = wp_remote_retrieve_body($response);
	6667	+ $decoded_response = json_decode($response_body, true);
	6668	+
	6669	+ $error_message = isset($decoded_response['error']['message'])
	6670	+ ? $decoded_response['error']['message']
	6671	+ : 'HTTP Error ' . $status_code;
	6672	+
	6673	+ $error_type = isset($decoded_response['error']['type'])
	6674	+ ? $decoded_response['error']['type']
	6675	+ : 'unknown';
	6676	+
	6677	+ //error_log('DeepSeek API HTTP Error: ' . $status_code . ' - ' . $error_message);
	6678	+
	6679	+ // Handle specific error types
	6680	+ switch ($status_code) {
	6681	+ case 401:
	6682	+ return [
	6683	+ 'error' => esc_html__('Authentication failed with DeepSeek. Please check your API key.', 'mxchat'),
	6684	+ 'error_code' => 'deepseek_auth_error',
	6685	+ 'provider' => 'deepseek'
	6686	+ ];
	6687	+
	6688	+ case 400:
	6689	+ if (strpos($error_message, 'API key') !== false) {
	6690	+ return [
	6691	+ 'error' => esc_html__('Invalid DeepSeek API key. Please check your API key configuration.', 'mxchat'),
	6692	+ 'error_code' => 'deepseek_invalid_api_key',
	6693	+ 'provider' => 'deepseek'
	6694	+ ];
	6695	+ }
	6696	+ break;
	6697	+
	6698	+ case 429:
	6699	+ if (strpos($error_message, 'quota') !== false) {
	6700	+ return [
	6701	+ 'error' => esc_html__('DeepSeek API quota exceeded. Please check your billing details.', 'mxchat'),
	6702	+ 'error_code' => 'deepseek_quota_exceeded',
	6703	+ 'provider' => 'deepseek'
	6704	+ ];
	6705	+ } else {
	6706	+ return [
	6707	+ 'error' => esc_html__('DeepSeek rate limit exceeded. Please try again later.', 'mxchat'),
	6708	+ 'error_code' => 'deepseek_rate_limit',
	6709	+ 'provider' => 'deepseek'
	6710	+ ];
	6711	+ }
	6712	+
	6713	+ case 500:
	6714	+ case 502:
	6715	+ case 503:
	6716	+ case 504:
	6717	+ return [
	6718	+ 'error' => esc_html__('DeepSeek service is currently unavailable. Please try again later.', 'mxchat'),
	6719	+ 'error_code' => 'deepseek_service_unavailable',
	6720	+ 'provider' => 'deepseek'
	6721	+ ];
	6722	+ }
	6723	+
	6724	+ // Generic error fallback
	6725	+ return [
	6726	+ 'error' => esc_html__('DeepSeek API error: ', 'mxchat') . esc_html($error_message),
	6727	+ 'error_code' => 'deepseek_api_error',
	6728	+ 'provider' => 'deepseek',
	6729	+ 'status_code' => $status_code
	6730	+ ];
	6731	+ }
	6732	+
	6733	+ $response_body = wp_remote_retrieve_body($response);
	6734	+ $decoded_response = json_decode($response_body, true);
	6735	+
	6736	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	6737	+ return trim($decoded_response['choices'][0]['message']['content']);
	6738	+ } else {
	6739	+ //error_log('DeepSeek API Response Format Error: ' . print_r($decoded_response, true));
	6740	+ return [
	6741	+ 'error' => esc_html__('Unexpected response format from DeepSeek.', 'mxchat'),
	6742	+ 'error_code' => 'deepseek_response_format_error',
	6743	+ 'provider' => 'deepseek'
	6744	+ ];
	6745	+ }
	6746	+ } catch (Exception $e) {
	6747	+ //error_log('DeepSeek Exception: ' . $e->getMessage());
	6748	+ return [
	6749	+ 'error' => esc_html__('System error when processing DeepSeek request: ', 'mxchat') . esc_html($e->getMessage()),
	6750	+ 'error_code' => 'deepseek_exception',
	6751	+ 'provider' => 'deepseek'
	6752	+ ];
	6753	+ }
	6754	+}
	6755	+private function mxchat_generate_response_gemini($selected_model, $gemini_api_key, $conversation_history, $relevant_content) {
	6756	+ // Get bot ID from session or request
	6757	+ $bot_id = $this->get_current_bot_id($session_id);
	6758	+
	6759	+ // Get system prompt instructions using centralized function
	6760	+ $system_prompt_instructions = $this->get_system_instructions($bot_id);
	6761	+
	6762	+ // Add system prompt to relevant content
	6763	+ $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
	6764	+
	6765	+ // Format messages for Gemini API
	6766	+ $formatted_messages = [];
	6767	+
	6768	+ // Add system message as the first user message with role prefix
	6769	+ // Note: Gemini doesn't have a dedicated system role, so we use a prefixed user message
	6770	+ $formatted_messages[] = [
	6771	+ 'role' => 'user',
	6772	+ 'parts' => [
	6773	+ ['text' => "[System Instructions] " . $content_with_instructions]
	6774	+ ]
	6775	+ ];
	6776	+
	6777	+ // Add model response to acknowledge system instructions
	6778	+ $formatted_messages[] = [
	6779	+ 'role' => 'model',
	6780	+ 'parts' => [
	6781	+ ['text' => "I understand and will follow these instructions."]
	6782	+ ]
	6783	+ ];
	6784	+
	6785	+ // Process the rest of the conversation history
	6786	+ $current_role = null;
	6787	+ $current_parts = [];
	6788	+
	6789	+ foreach ($conversation_history as $message) {
	6790	+ // Skip the first system message as we already handled it
	6791	+ if ($message['role'] === 'system') {
	6792	+ continue;
	6793	+ }
	6794	+
	6795	+ // Map roles to Gemini format
	6796	+ $gemini_role = '';
	6797	+ if ($message['role'] === 'user') {
	6798	+ $gemini_role = 'user';
	6799	+ } else if (in_array($message['role'], ['assistant', 'bot', 'agent'])) {
	6800	+ $gemini_role = 'model';
	6801	+ } else {
	6802	+ // Skip unsupported roles
	6803	+ continue;
	6804	+ }
	6805	+
	6806	+ // If we have a new role, add the previous message
	6807	+ if ($current_role !== null && $current_role !== $gemini_role && !empty($current_parts)) {
	6808	+ $formatted_messages[] = [
	6809	+ 'role' => $current_role,
	6810	+ 'parts' => $current_parts
	6811	+ ];
	6812	+ $current_parts = [];
	6813	+ }
	6814	+
	6815	+ // Set current role and add text to parts
	6816	+ $current_role = $gemini_role;
	6817	+ $current_parts[] = ['text' => $message['content']];
	6818	+ }
	6819	+
	6820	+ // Add the last message if there's content
	6821	+ if ($current_role !== null && !empty($current_parts)) {
	6822	+ $formatted_messages[] = [
	6823	+ 'role' => $current_role,
	6824	+ 'parts' => $current_parts
	6825	+ ];
	6826	+ }
	6827	+
	6828	+ // Build the request body
	6829	+ $body = json_encode([
	6830	+ 'contents' => $formatted_messages,
	6831	+ 'generationConfig' => [
	6832	+ 'temperature' => 0.7,
	6833	+ 'topP' => 0.95,
	6834	+ 'topK' => 40,
	6835	+ 'maxOutputTokens' => 8192,
	6836	+ ],
	6837	+ 'safetySettings' => [
	6838	+ [
	6839	+ 'category' => 'HARM_CATEGORY_HARASSMENT',
	6840	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	6841	+ ],
	6842	+ [
	6843	+ 'category' => 'HARM_CATEGORY_HATE_SPEECH',
	6844	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	6845	+ ],
	6846	+ [
	6847	+ 'category' => 'HARM_CATEGORY_SEXUALLY_EXPLICIT',
	6848	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	6849	+ ],
	6850	+ [
	6851	+ 'category' => 'HARM_CATEGORY_DANGEROUS_CONTENT',
	6852	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	6853	+ ]
	6854	+ ]
	6855	+ ]);
	6856	+
	6857	+ // Prepare the API endpoint
	6858	+ $api_endpoint = 'https://generativelanguage.googleapis.com/v1/models/' . $selected_model . ':generateContent?key=' . $gemini_api_key;
	6859	+
	6860	+ // Set up the API request
	6861	+ $args = [
	6862	+ 'body' => $body,
	6863	+ 'headers' => [
	6864	+ 'Content-Type' => 'application/json',
	6865	+ ],
	6866	+ 'timeout' => 60,
	6867	+ 'redirection' => 5,
	6868	+ 'blocking' => true,
	6869	+ 'httpversion' => '1.0',
	6870	+ 'sslverify' => true,
	6871	+ ];
	6872	+
	6873	+ // Make the API request
	6874	+ $response = wp_remote_post($api_endpoint, $args);
	6875	+
	6876	+ // Process the response
	6877	+ if (is_wp_error($response)) {
	6878	+ return "Sorry, there was an error processing your request: " . $response->get_error_message();
	6879	+ }
	6880	+
	6881	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	6882	+
	6883	+ // Handle potential errors in the response
	6884	+ if (isset($response_body['error'])) {
	6885	+ //error_log('Gemini API Error: ' . json_encode($response_body['error']));
	6886	+ return "Sorry, there was an error with the Gemini API: " .
	6887	+ (isset($response_body['error']['message']) ? $response_body['error']['message'] : 'Unknown error');
	6888	+ }
	6889	+
	6890	+ // Extract the response text
	6891	+ if (isset($response_body['candidates'][0]['content']['parts'][0]['text'])) {
	6892	+ return trim($response_body['candidates'][0]['content']['parts'][0]['text']);
	6893	+ } else {
	6894	+ //error_log('Unexpected Gemini API response format: ' . json_encode($response_body));
	6895	+ return "Sorry, I couldn't process that request. The response format was unexpected.";
	6896	+ }
	6897	+}
	6898	+
	6899	+
	6900	+public function test_streaming_request() {
	6901	+ $options = get_option('mxchat_options', []);
	6902	+ $model = $options['model'] ?? 'gpt-4o';
	6903	+
	6904	+ // Detect provider from model prefix
	6905	+ $provider = strtolower(explode('-', $model)[0]);
	6906	+
	6907	+ $sample_prompt = 'Hello! Can you stream this response back to me?';
	6908	+ $messages = [['role' => 'user', 'content' => $sample_prompt]];
	6909	+ $headers = [];
	6910	+ $body = [];
	6911	+ $url = '';
	6912	+ $api_key = '';
	6913	+
	6914	+ switch ($provider) {
	6915	+ case 'gpt':
	6916	+ case 'o1':
	6917	+ $api_key = $options['api_key'] ?? '';
	6918	+ if (empty($api_key)) return '❌ Missing API key for OpenAI';
	6919	+ $url = 'https://api.openai.com/v1/chat/completions';
	6920	+ $headers = [
	6921	+ 'Content-Type: application/json',
	6922	+ 'Authorization: Bearer ' . $api_key
	6923	+ ];
	6924	+ $body = [
	6925	+ 'model' => $model,
	6926	+ 'messages' => $messages,
	6927	+ 'stream' => true
	6928	+ ];
	6929	+ break;
	6930	+
	6931	+ case 'claude':
	6932	+ $api_key = $options['claude_api_key'] ?? '';
	6933	+ if (empty($api_key)) return '❌ Missing API key for Claude';
	6934	+ $url = 'https://api.anthropic.com/v1/messages';
	6935	+ $headers = [
	6936	+ 'Content-Type: application/json',
	6937	+ 'x-api-key: ' . $api_key,
	6938	+ 'anthropic-version: 2023-06-01'
	6939	+ ];
	6940	+ $body = [
	6941	+ 'model' => $model,
	6942	+ 'messages' => $messages,
	6943	+ 'max_tokens' => 100,
	6944	+ 'stream' => true
	6945	+ ];
	6946	+ break;
	6947	+
	6948	+ case 'grok':
	6949	+ $api_key = $options['xai_api_key'] ?? '';
	6950	+ if (empty($api_key)) return '❌ Missing API key for X.AI';
	6951	+ $url = 'https://api.x.ai/v1/chat/completions';
	6952	+ $headers = [
	6953	+ 'Content-Type: application/json',
	6954	+ 'Authorization: Bearer ' . $api_key
	6955	+ ];
	6956	+ $body = [
	6957	+ 'model' => $model,
	6958	+ 'messages' => $messages,
	6959	+ 'stream' => true
	6960	+ ];
	6961	+ break;
	6962	+
	6963	+ case 'deepseek':
	6964	+ if (empty($deepseek_api_key)) {
	6965	+ $error_response = [
	6966	+ 'error' => esc_html__('DeepSeek API key is not configured', 'mxchat'),
	6967	+ 'error_code' => 'missing_deepseek_api_key'
	6968	+ ];
	6969	+ if ($testing_data !== null) {
	6970	+ $error_response['testing_data'] = $testing_data;
	6971	+ }
	6972	+ return $error_response;
	6973	+ }
	6974	+ if ($streaming) {
	6975	+ return $this->mxchat_generate_response_deepseek_stream(
	6976	+ $selected_model,
	6977	+ $deepseek_api_key,
	6978	+ $conversation_history,
	6979	+ $relevant_content,
	6980	+ $session_id,
	6981	+ $testing_data // Pass testing data
	6982	+ );
	6983	+ } else {
	6984	+ $response = $this->mxchat_generate_response_deepseek(
	6985	+ $selected_model,
	6986	+ $deepseek_api_key,
	6987	+ $conversation_history,
	6988	+ $relevant_content
	6989	+ );
	6990	+ }
	6991	+ break;
	6992	+
	6993	+ case 'gemini':
	6994	+ $api_key = $options['gemini_api_key'] ?? '';
	6995	+ if (empty($api_key)) return '❌ Missing API key for Gemini';
	6996	+ $url = 'https://generativelanguage.googleapis.com/v1beta/models/' . $model . ':streamGenerateContent?key=' . $api_key;
	6997	+ $headers = ['Content-Type: application/json'];
	6998	+ $body = [
	6999	+ 'contents' => [['role' => 'user', 'parts' => [['text' => $sample_prompt]]]],
	7000	+ 'generationConfig' => ['temperature' => 0.7]
	7001	+ ];
	7002	+ break;
	7003	+
	7004	+ default:
	7005	+ return '❌ Unsupported provider: ' . $provider;
	7006	+ }
	7007	+
	7008	+ // Do the actual streaming test
	7009	+ $ch = curl_init($url);
	7010	+ curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($body));
	7011	+ curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	7012	+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	7013	+ curl_setopt($ch, CURLOPT_TIMEOUT, 15);
	7014	+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	7015	+
	7016	+ $response = curl_exec($ch);
	7017	+ $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	7018	+ $error = curl_error($ch);
	7019	+ curl_close($ch);
	7020	+
	7021	+ if ($error) return "❌ cURL error: $error";
	7022	+ if ($http_code !== 200) {
	7023	+ $error_message = json_decode($response, true)['error']['message'] ?? 'Unknown';
	7024	+ return "❌ HTTP $http_code: $error_message";
	7025	+ }
	7026	+
	7027	+ return true;
	7028	+}
	7029	+
	7030	+public function mxchat_dismiss_pre_chat_message() {
	7031	+ // Get and sanitize the user identifier
	7032	+ $user_id = $this->mxchat_get_user_identifier();
	7033	+ $user_id = sanitize_key($user_id);
	7034	+
	7035	+ // Set a transient to track that the user has dismissed the pre-chat message
	7036	+ $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
	7037	+ set_transient($transient_key, true, DAY_IN_SECONDS);
	7038	+
	7039	+ wp_send_json_success();
	7040	+}
	7041	+
	7042	+public function mxchat_check_pre_chat_message_status() {
	7043	+ // Get and sanitize the user identifier
	7044	+ $user_id = $this->mxchat_get_user_identifier();
	7045	+ $user_id = sanitize_key($user_id);
	7046	+
	7047	+ // Check if the transient exists (i.e., if the message was dismissed)
	7048	+ $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
	7049	+ $dismissed = get_transient($transient_key);
	7050	+
	7051	+ // Log the result to see if it's being set correctly
	7052	+ //error_log("Check pre-chat message dismissed for $user_id: " . ($dismissed ? 'Yes' : 'No'));
	7053	+
	7054	+ if ($dismissed) {
	7055	+ wp_send_json_success(['dismissed' => true]);
	7056	+ } else {
	7057	+ wp_send_json_success(['dismissed' => false]);
	7058	+ }
	7059	+
	7060	+ wp_die();
	7061	+}
	7062	+
	7063	+private function mxchat_calculate_cosine_similarity($vectorA, $vectorB) {
	7064	+ if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) {
	7065	+ return 0;
	7066	+ }
	7067	+
	7068	+ $dotProduct = array_sum(array_map(function ($a, $b) {
	7069	+ return $a * $b;
	7070	+ }, $vectorA, $vectorB));
	7071	+ $normA = sqrt(array_sum(array_map(function ($a) {
	7072	+ return $a * $a;
	7073	+ }, $vectorA)));
	7074	+ $normB = sqrt(array_sum(array_map(function ($b) {
	7075	+ return $b * $b;
	7076	+ }, $vectorB)));
	7077	+
	7078	+ if ($normA == 0 || $normB == 0) {
	7079	+ return 0;
	7080	+ }
	7081	+
	7082	+ return $dotProduct / ($normA * $normB);
	7083	+ }
	7084	+
	7085	+
	7086	+public function mxchat_enqueue_scripts_styles() {
	7087	+ // Enqueue the script
	7088	+ wp_enqueue_script(
	7089	+ 'mxchat-chat-js',
	7090	+ plugin_dir_url(__FILE__) . '../js/chat-script.js',
	7091	+ array('jquery'),
	7092	+ MXCHAT_VERSION,
	7093	+ true
	7094	+ );
	7095	+ // Enqueue the CSS
	7096	+ wp_enqueue_style(
	7097	+ 'mxchat-chat-css',
	7098	+ plugin_dir_url(__FILE__) . '../css/chat-style.css',
	7099	+ array(),
	7100	+ MXCHAT_VERSION
	7101	+ );
	7102	+ // Fetch options from the database
	7103	+ $this->options = get_option('mxchat_options');
	7104	+ $prompts_options = get_option('mxchat_prompts_options', array());
	7105	+
	7106	+ // Prepare settings for JavaScript
	7107	+ $style_settings = array(
	7108	+ 'ajax_url' => admin_url('admin-ajax.php'),
	7109	+ 'nonce' => wp_create_nonce('mxchat_chat_nonce'),
	7110	+ 'model' => isset($this->options['model']) ? $this->options['model'] : 'gpt-4o',
	7111	+ 'enable_streaming_toggle' => isset($this->options['enable_streaming_toggle']) ? $this->options['enable_streaming_toggle'] : 'on',
	7112	+ 'contextual_awareness_toggle' => isset($this->options['contextual_awareness_toggle']) ? $this->options['contextual_awareness_toggle'] : 'off',
	7113	+ 'link_target_toggle' => $this->options['link_target_toggle'] ?? 'off',
	7114	+ 'rate_limit_message' => $this->options['rate_limit_message'] ?? 'Rate limit exceeded. Please try again later.',
	7115	+ 'complianz_toggle' => isset($this->options['complianz_toggle']) && $this->options['complianz_toggle'] === 'on',
	7116	+ 'user_message_bg_color' => $this->options['user_message_bg_color'] ?? '#fff',
	7117	+ 'user_message_font_color' => $this->options['user_message_font_color'] ?? '#212121',
	7118	+ 'bot_message_bg_color' => $this->options['bot_message_bg_color'] ?? '#212121',
	7119	+ 'bot_message_font_color' => $this->options['bot_message_font_color'] ?? '#fff',
	7120	+ 'top_bar_bg_color' => $this->options['top_bar_bg_color'] ?? '#212121',
	7121	+ 'send_button_font_color' => $this->options['send_button_font_color'] ?? '#212121',
	7122	+ 'close_button_color' => $this->options['close_button_color'] ?? '#fff',
	7123	+ 'chatbot_background_color' => $this->options['chatbot_background_color'] ?? '#212121',
	7124	+ 'chatbot_bg_color' => $this->options['chatbot_bg_color'] ?? '#fff',
	7125	+ 'icon_color' => $this->options['icon_color'] ?? '#fff',
	7126	+ 'chat_input_font_color' => $this->options['chat_input_font_color'] ?? '#212121',
	7127	+ 'chat_persistence_toggle' => $this->options['chat_persistence_toggle'] ?? 'off',
	7128	+ 'appendWidgetToBody' => $this->options['append_to_body'] ?? 'off',
	7129	+ 'live_agent_message_bg_color' => $this->options['live_agent_message_bg_color'] ?? '#ffffff',
	7130	+ 'live_agent_message_font_color' => $this->options['live_agent_message_font_color'] ?? '#333333',
	7131	+ 'chat_toolbar_toggle' => $this->options['chat_toolbar_toggle'] ?? 'off',
	7132	+ 'mode_indicator_bg_color' => $this->options['mode_indicator_bg_color'] ?? '#767676',
	7133	+ 'mode_indicator_font_color' => $this->options['mode_indicator_font_color'] ?? '#ffffff',
	7134	+ 'toolbar_icon_color' => $this->options['toolbar_icon_color'] ?? '#212121',
	7135	+ 'use_pinecone' => $prompts_options['mxchat_use_pinecone'] ?? '0',
	7136	+ 'email_collection_enabled' => $this->options['enable_email_block'] ?? 'off', // FIXED
	7137	+ 'initial_email_state' => null, // Also fixed this undefined variable
	7138	+ 'skip_email_check' => true,
	7139	+ 'pinecone_enabled' => isset($prompts_options['mxchat_use_pinecone']) && $prompts_options['mxchat_use_pinecone'] === '1'
	7140	+ );
	7141	+ // Pass the settings to the script
	7142	+ wp_localize_script('mxchat-chat-js', 'mxchatChat', $style_settings);
	7143	+}
	7144	+
	7145	+
	7146	+/**
	7147	+ * Setup the cron jobs for rate limits with guard against multiple calls
	7148	+ */
	7149	+public function setup_rate_limit_cron_jobs() {
	7150	+ // Add a guard to prevent multiple rapid calls
	7151	+ $last_setup = get_transient('mxchat_cron_setup_guard');
	7152	+ if ($last_setup && (time() - $last_setup) < 60) {
	7153	+ // Don't run again if we ran less than 60 seconds ago
	7154	+ return;
	7155	+ }
	7156	+
	7157	+ // Set the guard
	7158	+ set_transient('mxchat_cron_setup_guard', time(), 300); // 5 minutes
	7159	+
	7160	+ try {
	7161	+ // First, check if WordPress cron is disabled
	7162	+ if (defined('DISABLE_WP_CRON') && DISABLE_WP_CRON) {
	7163	+ //error_log('MxChat: WordPress cron is disabled (DISABLE_WP_CRON = true), using fallback system');
	7164	+ $this->setup_fallback_rate_limit_system();
	7165	+ return;
	7166	+ }
	7167	+
	7168	+ // Check if cron is already scheduled - if so, don't mess with it
	7169	+ if (wp_next_scheduled('mxchat_reset_rate_limits')) {
	7170	+ //error_log('MxChat: Rate limit cron already scheduled, skipping setup');
	7171	+ return;
	7172	+ }
	7173	+
	7174	+ // Clear any orphaned hooks (but don't loop indefinitely)
	7175	+ $hooks_to_clear = [
	7176	+ 'mxchat_reset_rate_limits',
	7177	+ 'mxchat_reset_hourly_rate_limits',
	7178	+ 'mxchat_reset_daily_rate_limits',
	7179	+ 'mxchat_reset_weekly_rate_limits',
	7180	+ 'mxchat_reset_monthly_rate_limits'
	7181	+ ];
	7182	+
	7183	+ foreach ($hooks_to_clear as $hook) {
	7184	+ // Only clear a maximum of 3 instances to prevent infinite loops
	7185	+ $cleared = 0;
	7186	+ while (wp_next_scheduled($hook) && $cleared < 3) {
	7187	+ wp_clear_scheduled_hook($hook);
	7188	+ $cleared++;
	7189	+ }
	7190	+ }
	7191	+
	7192	+ // Small delay after clearing
	7193	+ usleep(100000); // 0.1 seconds
	7194	+
	7195	+ // Try to schedule the event
	7196	+ $initial_time = time() + 300; // Start in 5 minutes
	7197	+ $result = wp_schedule_event($initial_time, 'hourly', 'mxchat_reset_rate_limits');
	7198	+
	7199	+ if ($result === false) {
	7200	+ //error_log('MxChat: Failed to schedule cron, using fallback system');
	7201	+ $this->setup_fallback_rate_limit_system();
	7202	+ } else {
	7203	+ //error_log('MxChat: Successfully scheduled rate limit reset cron');
	7204	+ }
	7205	+
	7206	+ } catch (Exception $e) {
	7207	+ //error_log('MxChat: Cron setup exception: ' . $e->getMessage());
	7208	+ $this->setup_fallback_rate_limit_system();
	7209	+ }
	7210	+}
	7211	+
	7212	+/**
	7213	+ * Try alternative cron scheduling methods
	7214	+ */
	7215	+private function try_alternative_cron_scheduling($initial_time) {
	7216	+ try {
	7217	+ // Method 1: Try with current time instead of future time
	7218	+ $result1 = wp_schedule_event(time(), 'hourly', 'mxchat_reset_rate_limits');
	7219	+ if ($result1 !== false) {
	7220	+ //error_log('MxChat: Alternative method 1 (current time) succeeded');
	7221	+ return true;
	7222	+ }
	7223	+
	7224	+ // Method 2: Try with a different interval
	7225	+ $result2 = wp_schedule_event($initial_time, 'daily', 'mxchat_reset_rate_limits');
	7226	+ if ($result2 !== false) {
	7227	+ //error_log('MxChat: Alternative method 2 (daily interval) succeeded');
	7228	+ return true;
	7229	+ }
	7230	+
	7231	+ // Method 3: Try wp_schedule_single_event first, then recurring
	7232	+ $result3 = wp_schedule_single_event($initial_time, 'mxchat_reset_rate_limits');
	7233	+ if ($result3 !== false) {
	7234	+ //error_log('MxChat: Alternative method 3 (single event) succeeded');
	7235	+ // Schedule the next one manually in the handler
	7236	+ return true;
	7237	+ }
	7238	+
	7239	+ return false;
	7240	+
	7241	+ } catch (Exception $e) {
	7242	+ //error_log('MxChat: Alternative cron scheduling exception: ' . $e->getMessage());
	7243	+ return false;
	7244	+ }
	7245	+}
	7246	+
	7247	+/**
	7248	+ * Enhanced fallback rate limit system
	7249	+ */
	7250	+private function setup_fallback_rate_limit_system() {
	7251	+ // Set a flag to use database-based rate limit cleanup
	7252	+ update_option('mxchat_use_fallback_rate_limits', true);
	7253	+
	7254	+ // Schedule a one-time check to happen on the next plugin load
	7255	+ update_option('mxchat_next_rate_limit_check', time() + 3600);
	7256	+
	7257	+ // Also set up a more frequent fallback check (every 4 hours)
	7258	+ update_option('mxchat_fallback_check_interval', 4 * 3600);
	7259	+
	7260	+ //error_log('MxChat: Fallback rate limit system activated');
	7261	+}
	7262	+
	7263	+/**
	7264	+ * Enhanced fallback check method
	7265	+ */
	7266	+public function check_fallback_rate_limits() {
	7267	+ $use_fallback = get_option('mxchat_use_fallback_rate_limits', false);
	7268	+
	7269	+ if (!$use_fallback) {
	7270	+ return; // Regular cron is working
	7271	+ }
	7272	+
	7273	+ $next_check = get_option('mxchat_next_rate_limit_check', 0);
	7274	+ $check_interval = get_option('mxchat_fallback_check_interval', 3600);
	7275	+
	7276	+ if (time() >= $next_check) {
	7277	+ //error_log('MxChat: Running fallback rate limit cleanup');
	7278	+ $this->mxchat_reset_rate_limits();
	7279	+
	7280	+ // Schedule next check
	7281	+ update_option('mxchat_next_rate_limit_check', time() + $check_interval);
	7282	+ }
	7283	+}
	7284	+/**
	7285	+ * Enhanced rate limit check that includes fallback cleanup and bot-specific rate limits
	7286	+ */
	7287	+public function check_rate_limit() {
	7288	+ // Check if we need to run fallback cleanup
	7289	+ $use_fallback = get_option('mxchat_use_fallback_rate_limits', false);
	7290	+ $next_check = get_option('mxchat_next_rate_limit_check', 0);
	7291	+
	7292	+ if ($use_fallback && time() >= $next_check) {
	7293	+ $this->mxchat_reset_rate_limits();
	7294	+ update_option('mxchat_next_rate_limit_check', time() + 3600); // Next hour
	7295	+ }
	7296	+
	7297	+ // Get bot ID from current request context
	7298	+ $bot_id = isset($_POST['bot_id']) ? sanitize_key($_POST['bot_id']) : 'default';
	7299	+
	7300	+ // Get bot-specific options (includes rate limits if overridden)
	7301	+ $bot_options = $this->get_bot_options($bot_id);
	7302	+ $current_options = !empty($bot_options) ? $bot_options : $this->options;
	7303	+
	7304	+ // Use bot-specific rate limits if available, otherwise fall back to default
	7305	+ $rate_limits_source = isset($current_options['rate_limits']) ? $current_options['rate_limits'] : get_option('mxchat_options', [])['rate_limits'] ?? [];
	7306	+
	7307	+ // Determine user role or if logged out
	7308	+ if (is_user_logged_in()) {
	7309	+ $user = wp_get_current_user();
	7310	+ $user_id = $user->ID;
	7311	+
	7312	+ // Get the user's primary role using reset() to safely get the first element
	7313	+ $user_roles = $user->roles;
	7314	+
	7315	+ // Safely get the first role regardless of array key structure
	7316	+ if (!empty($user_roles) && is_array($user_roles)) {
	7317	+ $role = reset($user_roles); // This safely gets the first element regardless of key
	7318	+ } else {
	7319	+ $role = 'subscriber'; // Default to subscriber if no role found
	7320	+ }
	7321	+ } else {
	7322	+ $role = 'logged_out';
	7323	+ // Use IP address for non-logged-in users
	7324	+ $user_id = $this->get_client_ip();
	7325	+ }
	7326	+
	7327	+ // Check if rate limits are configured for this role
	7328	+ if (!isset($rate_limits_source[$role])) {
	7329	+ return true; // No limit set for this role
	7330	+ }
	7331	+
	7332	+ $limit = $rate_limits_source[$role]['limit'];
	7333	+
	7334	+ // If unlimited, return true immediately
	7335	+ if ($limit === 'unlimited') {
	7336	+ return true;
	7337	+ }
	7338	+
	7339	+ // Get the option name for this user/role with safer naming (include bot_id for bot-specific limits)
	7340	+ $safe_role = preg_replace('/[^a-zA-Z0-9_]/', '_', $role);
	7341	+ $safe_user_id = preg_replace('/[^a-zA-Z0-9_]/', '_', $user_id);
	7342	+ $safe_bot_id = preg_replace('/[^a-zA-Z0-9_]/', '_', $bot_id);
	7343	+
	7344	+ // Include bot_id in option name so each bot has separate rate limits
	7345	+ $option_name = 'mxchat_chat_limit_' . $safe_bot_id . '_' . $safe_role . '_' . $safe_user_id;
	7346	+
	7347	+ // Get the counter data
	7348	+ $limit_data = get_option($option_name, ['count' => 0, 'timestamp' => time()]);
	7349	+
	7350	+ // If first request or counter reset needed, set the initial timestamp
	7351	+ if ($limit_data['count'] === 0) {
	7352	+ $limit_data['timestamp'] = time();
	7353	+ update_option($option_name, $limit_data);
	7354	+ }
	7355	+
	7356	+ // Get the timeframe
	7357	+ $timeframe = isset($rate_limits_source[$role]['timeframe']) ?
	7358	+ $rate_limits_source[$role]['timeframe'] : 'daily';
	7359	+
	7360	+ // Check if the counter needs to be reset based on timeframe
	7361	+ $current_time = time();
	7362	+ $timestamp = $limit_data['timestamp'];
	7363	+ $should_reset = false;
	7364	+
	7365	+ switch ($timeframe) {
	7366	+ case 'hourly':
	7367	+ $should_reset = ($current_time - $timestamp) >= 3600; // 1 hour
	7368	+ break;
	7369	+ case 'daily':
	7370	+ $should_reset = ($current_time - $timestamp) >= 86400; // 24 hours
	7371	+ break;
	7372	+ case 'weekly':
	7373	+ $should_reset = ($current_time - $timestamp) >= 604800; // 7 days
	7374	+ break;
	7375	+ case 'monthly':
	7376	+ $should_reset = ($current_time - $timestamp) >= 2592000; // 30 days
	7377	+ break;
	7378	+ }
	7379	+
	7380	+ // Reset the counter if the timeframe has passed
	7381	+ if ($should_reset) {
	7382	+ $limit_data = ['count' => 0, 'timestamp' => $current_time];
	7383	+ update_option($option_name, $limit_data);
	7384	+ }
	7385	+
	7386	+ // Check if user has exceeded their limit
	7387	+ if ($limit_data['count'] >= intval($limit)) {
	7388	+ // Get the custom message for this role
	7389	+ $message = !empty($rate_limits_source[$role]['message'])
	7390	+ ? $rate_limits_source[$role]['message']
	7391	+ : __('Rate limit exceeded. Please try again later.', 'mxchat');
	7392	+
	7393	+ // Add timeframe information to the message if placeholders exist
	7394	+ $timeframe_label = '';
	7395	+ switch ($timeframe) {
	7396	+ case 'hourly':
	7397	+ $timeframe_label = __('hour', 'mxchat');
	7398	+ break;
	7399	+ case 'daily':
	7400	+ $timeframe_label = __('day', 'mxchat');
	7401	+ break;
	7402	+ case 'weekly':
	7403	+ $timeframe_label = __('week', 'mxchat');
	7404	+ break;
	7405	+ case 'monthly':
	7406	+ $timeframe_label = __('month', 'mxchat');
	7407	+ break;
	7408	+ }
	7409	+
	7410	+ // Replace placeholders in the message
	7411	+ $message = str_replace(
	7412	+ ['{limit}', '{count}', '{remaining}', '{timeframe}'],
	7413	+ [intval($limit), $limit_data['count'], max(0, intval($limit) - $limit_data['count']), $timeframe_label],
	7414	+ $message
	7415	+ );
	7416	+
	7417	+ // Process HTML links in the message
	7418	+ $message = $this->process_rate_limit_message_html($message);
	7419	+
	7420	+ // Return error with the processed message
	7421	+ return [
	7422	+ 'error' => true,
	7423	+ 'message' => $message
	7424	+ ];
	7425	+ }
	7426	+
	7427	+ // Increment the counter
	7428	+ $limit_data['count']++;
	7429	+ update_option($option_name, $limit_data);
	7430	+
	7431	+ return true;
	7432	+}
	7433	+
	7434	+/**
	7435	+ * Enhanced rate limit reset with better error handling
	7436	+ */
	7437	+public function mxchat_reset_rate_limits() {
	7438	+ try {
	7439	+ global $wpdb;
	7440	+ $all_options = get_option('mxchat_options', []);
	7441	+ $current_time = time();
	7442	+
	7443	+ // Get rate limit options with a safer query and limit
	7444	+ $option_names = $wpdb->get_col(
	7445	+ $wpdb->prepare(
	7446	+ "SELECT option_name FROM {$wpdb->options}
	7447	+ WHERE option_name LIKE %s
	7448	+ LIMIT 1000",
	7449	+ 'mxchat_chat_limit_%'
	7450	+ )
	7451	+ );
	7452	+
	7453	+ if (empty($option_names)) {
	7454	+ return;
	7455	+ }
	7456	+
	7457	+ $processed_count = 0;
	7458	+ $max_processing_time = 30; // Maximum 30 seconds
	7459	+ $start_time = time();
	7460	+
	7461	+ foreach ($option_names as $option_name) {
	7462	+ // Check processing time limit
	7463	+ if ((time() - $start_time) > $max_processing_time) {
	7464	+ //error_log('MxChat: Rate limit reset timeout after processing ' . $processed_count . ' entries');
	7465	+ break;
	7466	+ }
	7467	+
	7468	+ // Parse the option name more safely
	7469	+ if (!preg_match('/^mxchat_chat_limit_(.+)_(.+)$/', $option_name, $matches)) {
	7470	+ continue;
	7471	+ }
	7472	+
	7473	+ $role_and_user = $matches[1] . '_' . $matches[2];
	7474	+ $parts = explode('_', $role_and_user);
	7475	+
	7476	+ if (count($parts) < 2) {
	7477	+ continue;
	7478	+ }
	7479	+
	7480	+ // Extract role (everything except the last part which is user ID)
	7481	+ $user_id_part = array_pop($parts);
	7482	+ $role = implode('_', $parts);
	7483	+
	7484	+ // Skip if role doesn't exist in our settings
	7485	+ if (!isset($all_options['rate_limits'][$role])) {
	7486	+ // Clean up orphaned entries
	7487	+ delete_option($option_name);
	7488	+ continue;
	7489	+ }
	7490	+
	7491	+ $timeframe = $all_options['rate_limits'][$role]['timeframe'] ?? 'daily';
	7492	+ $limit_data = get_option($option_name);
	7493	+
	7494	+ if (!$limit_data || !is_array($limit_data) || !isset($limit_data['timestamp'])) {
	7495	+ // Clean up invalid entries
	7496	+ delete_option($option_name);
	7497	+ continue;
	7498	+ }
	7499	+
	7500	+ $timestamp = $limit_data['timestamp'];
	7501	+ $should_reset = false;
	7502	+
	7503	+ // Determine if we should reset based on the timeframe
	7504	+ switch ($timeframe) {
	7505	+ case 'hourly':
	7506	+ $should_reset = ($current_time - $timestamp) >= 3600;
	7507	+ break;
	7508	+ case 'daily':
	7509	+ $should_reset = ($current_time - $timestamp) >= 86400;
	7510	+ break;
	7511	+ case 'weekly':
	7512	+ $should_reset = ($current_time - $timestamp) >= 604800;
	7513	+ break;
	7514	+ case 'monthly':
	7515	+ $should_reset = ($current_time - $timestamp) >= 2592000;
	7516	+ break;
	7517	+ }
	7518	+
	7519	+ // Reset the counter if the timeframe has passed
	7520	+ if ($should_reset) {
	7521	+ delete_option($option_name);
	7522	+ wp_cache_delete($option_name, 'options');
	7523	+ $processed_count++;
	7524	+ }
	7525	+ }
	7526	+
	7527	+ // Clean up any orphaned cache entries
	7528	+ wp_cache_delete('mxchat_all_chat_limits', 'options');
	7529	+
	7530	+ //error_log("MxChat: Rate limit reset completed. Processed {$processed_count} entries.");
	7531	+
	7532	+ } catch (Exception $e) {
	7533	+ //error_log('MxChat: Rate limit reset error: ' . $e->getMessage());
	7534	+ }
	7535	+}
	7536	+
	7537	+
	7538	+/**
	7539	+ * Process HTML links in rate limit messages
	7540	+ *
	7541	+ * @param string $message The rate limit message
	7542	+ * @return string The processed message with safe HTML links
	7543	+ */
	7544	+private function process_rate_limit_message_html($message) {
	7545	+ // Return original message if empty
	7546	+ if (empty($message)) {
	7547	+ return $message;
	7548	+ }
	7549	+
	7550	+ // First, convert markdown links to HTML
	7551	+ $message = $this->convert_markdown_links($message);
	7552	+
	7553	+ // Then, auto-convert any remaining plain URLs to links
	7554	+ $message = $this->auto_link_urls($message);
	7555	+
	7556	+ // Allow basic HTML tags for links and formatting
	7557	+ $allowed_tags = [
	7558	+ 'a' => [
	7559	+ 'href' => true,
	7560	+ 'target' => true,
	7561	+ 'rel' => true,
	7562	+ 'title' => true,
	7563	+ 'class' => true
	7564	+ ],
	7565	+ 'strong' => [],
	7566	+ 'em' => [],
	7567	+ 'br' => [],
	7568	+ 'b' => [],
	7569	+ 'i' => [],
	7570	+ 'span' => ['class' => true]
	7571	+ ];
	7572	+
	7573	+ // Sanitize but allow the specified HTML tags
	7574	+ $processed_message = wp_kses($message, $allowed_tags);
	7575	+
	7576	+ // If wp_kses stripped everything, return the original message as plain text
	7577	+ if (empty($processed_message) && !empty($message)) {
	7578	+ // Strip all HTML and return plain text as fallback
	7579	+ return wp_strip_all_tags($message);
	7580	+ }
	7581	+
	7582	+ return $processed_message;
	7583	+}
	7584	+
	7585	+/**
	7586	+ * Convert markdown links to HTML
	7587	+ *
	7588	+ * @param string $text The text to process
	7589	+ * @return string The text with markdown links converted to HTML
	7590	+ */
	7591	+private function convert_markdown_links($text) {
	7592	+ // Return original text if empty
	7593	+ if (empty($text)) {
	7594	+ return $text;
	7595	+ }
	7596	+
	7597	+ // Pattern to match markdown links: [text](url)
	7598	+ $pattern = '/\[([^\]]+)\]\(([^)]+)\)/';
	7599	+
	7600	+ $processed_text = preg_replace_callback($pattern, function($matches) {
	7601	+ $link_text = $matches[1];
	7602	+ $url = $matches[2];
	7603	+
	7604	+ // Clean up any trailing punctuation from the URL
	7605	+ $url = rtrim($url, '.,;:!?');
	7606	+
	7607	+ // Sanitize the link text and URL
	7608	+ $safe_text = esc_html($link_text);
	7609	+ $safe_url = esc_url($url);
	7610	+
	7611	+ // Create the HTML link
	7612	+ return '<a href="' . $safe_url . '" target="_blank" rel="noopener noreferrer">' . $safe_text . '</a>';
	7613	+ }, $text);
	7614	+
	7615	+ // If preg_replace_callback failed, return original text
	7616	+ if ($processed_text === null) {
	7617	+ return $text;
	7618	+ }
	7619	+
	7620	+ return $processed_text;
	7621	+}
	7622	+
	7623	+/**
	7624	+ * Auto-convert plain URLs to clickable links
	7625	+ *
	7626	+ * @param string $text The text to process
	7627	+ * @return string The text with URLs converted to links
	7628	+ */
	7629	+private function auto_link_urls($text) {
	7630	+ // Return original text if empty
	7631	+ if (empty($text)) {
	7632	+ return $text;
	7633	+ }
	7634	+
	7635	+ // Simple pattern that avoids complex lookbehinds
	7636	+ // This will match URLs that are not already inside href attributes or markdown links
	7637	+ $pattern = '/(?<!href=["\'])(?<!\]\()https?:\/\/[^\s<>"\')\]]+/i';
	7638	+
	7639	+ $processed_text = preg_replace_callback($pattern, function($matches) {
	7640	+ $url = $matches[0];
	7641	+ // Clean up any trailing punctuation that might have been captured
	7642	+ $url = rtrim($url, '.,;:!?');
	7643	+
	7644	+ // Add target="_blank" and rel="noopener noreferrer" for security
	7645	+ return '<a href="' . esc_url($url) . '" target="_blank" rel="noopener noreferrer">' . esc_html($url) . '</a>';
	7646	+ }, $text);
	7647	+
	7648	+ // If preg_replace_callback failed, return original text
	7649	+ if ($processed_text === null) {
	7650	+ return $text;
	7651	+ }
	7652	+
	7653	+ return $processed_text;
	7654	+}
	7655	+
	7656	+
	7657	+// Helper function to get client IP address
	7658	+private function get_client_ip() {
	7659	+ // Check for shared internet/ISP IP
	7660	+ if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
	7661	+ return sanitize_text_field($_SERVER['HTTP_CLIENT_IP']);
	7662	+ }
	7663	+
	7664	+ // Check for IPs passing through proxies
	7665	+ if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
	7666	+ // Use the first value in the comma-separated list
	7667	+ $forwarded_for = explode(',', sanitize_text_field($_SERVER['HTTP_X_FORWARDED_FOR']));
	7668	+ return trim($forwarded_for[0]);
	7669	+ }
	7670	+
	7671	+ if (!empty($_SERVER['REMOTE_ADDR'])) {
	7672	+ return sanitize_text_field($_SERVER['REMOTE_ADDR']);
	7673	+ }
	7674	+
	7675	+ // Fallback
	7676	+ return 'unknown';
	7677	+}
	7678	+
	7679	+/**
	7680	+ * AJAX handler to get system information for testing panel
	7681	+ */
	7682	+/**
	7683	+ * AJAX handler to get system information for testing panel
	7684	+ */
	7685	+public function mxchat_get_system_info() {
	7686	+ // Verify nonce for security
	7687	+ if (!wp_verify_nonce($_POST['nonce'], 'mxchat_test_nonce')) {
	7688	+ wp_send_json_error(['message' => 'Invalid nonce']);
	7689	+ return;
	7690	+ }
	7691	+
	7692	+ // Only allow admin users
	7693	+ if (!current_user_can('administrator')) {
	7694	+ wp_send_json_error(['message' => 'Unauthorized']);
	7695	+ return;
	7696	+ }
	7697	+
	7698	+ // Get system prompt from options
	7699	+ $system_prompt = isset($this->options['system_prompt_instructions'])
	7700	+ ? $this->options['system_prompt_instructions']
	7701	+ : 'No system prompt configured';
	7702	+
	7703	+ // Get selected model
	7704	+ $selected_model = isset($this->options['model']) ? $this->options['model'] : 'gpt-4o';
	7705	+
	7706	+ // Check if OpenRouter is being used
	7707	+ $is_openrouter = ($selected_model === 'openrouter');
	7708	+ $openrouter_model = '';
	7709	+
	7710	+ if ($is_openrouter) {
	7711	+ // Get the actual OpenRouter model that's selected
	7712	+ $openrouter_model = isset($this->options['openrouter_selected_model'])
	7713	+ ? $this->options['openrouter_selected_model']
	7714	+ : 'No OpenRouter model selected';
	7715	+
	7716	+ // Update selected_model display to show both
	7717	+ $selected_model = 'OpenRouter: ' . $openrouter_model;
	7718	+ }
	7719	+
	7720	+ // Get API key status (just check if they exist, don't expose the keys)
	7721	+ $api_status = [];
	7722	+ $api_status['openai'] = !empty($this->options['api_key']);
	7723	+ $api_status['claude'] = !empty($this->options['claude_api_key']);
	7724	+ $api_status['gemini'] = !empty($this->options['gemini_api_key']);
	7725	+ $api_status['xai'] = !empty($this->options['xai_api_key']);
	7726	+ $api_status['deepseek'] = !empty($this->options['deepseek_api_key']);
	7727	+ $api_status['openrouter'] = !empty($this->options['openrouter_api_key']);
	7728	+
	7729	+ wp_send_json_success([
	7730	+ 'system_prompt' => $system_prompt,
	7731	+ 'selected_model' => $selected_model,
	7732	+ 'is_openrouter' => $is_openrouter,
	7733	+ 'openrouter_model' => $openrouter_model,
	7734	+ 'api_status' => $api_status
	7735	+ ]);
	7736	+}
	7737	+
	7738	+/**
	7739	+ * AJAX handler to get similarity threshold
	7740	+ */
	7741	+public function mxchat_get_similarity_threshold() {
	7742	+ // Verify nonce for security
	7743	+ if (!wp_verify_nonce($_POST['nonce'], 'mxchat_test_nonce')) {
	7744	+ wp_send_json_error(['message' => 'Invalid nonce']);
	7745	+ return;
	7746	+ }
	7747	+
	7748	+ // Only allow admin users
	7749	+ if (!current_user_can('administrator')) {
	7750	+ wp_send_json_error(['message' => 'Unauthorized']);
	7751	+ return;
	7752	+ }
	7753	+
	7754	+ // Get similarity threshold from main options (default 35%)
	7755	+ $similarity_threshold = isset($this->options['similarity_threshold'])
	7756	+ ? ((int) $this->options['similarity_threshold']) / 100
	7757	+ : 0.35;
	7758	+
	7759	+ wp_send_json_success([
	7760	+ 'threshold' => $similarity_threshold,
	7761	+ 'threshold_percentage' => ($similarity_threshold * 100) . '%'
	7762	+ ]);
	7763	+}
	7764	+
	7765	+/**
	7766	+ * AJAX handler to get knowledge base status
	7767	+ */
	7768	+public function mxchat_get_kb_status() {
	7769	+ // Verify nonce for security
	7770	+ if (!wp_verify_nonce($_POST['nonce'], 'mxchat_test_nonce')) {
	7771	+ wp_send_json_error(['message' => 'Invalid nonce']);
	7772	+ return;
	7773	+ }
	7774	+
	7775	+ // Only allow admin users
	7776	+ if (!current_user_can('administrator')) {
	7777	+ wp_send_json_error(['message' => 'Unauthorized']);
	7778	+ return;
	7779	+ }
	7780	+
	7781	+ // Check Pinecone vs WordPress
	7782	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	7783	+ $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1');
	7784	+
	7785	+ $kb_info = [
	7786	+ 'type' => $use_pinecone ? 'Pinecone' : 'WordPress Database',
	7787	+ 'status' => 'Active'
	7788	+ ];
	7789	+
	7790	+ // Get document count
	7791	+ if ($use_pinecone) {
	7792	+ $kb_info['documents'] = 'Connected to Pinecone';
	7793	+ $kb_info['api_configured'] = !empty($addon_options['mxchat_pinecone_api_key']);
	7794	+ } else {
	7795	+ // Count documents in WordPress database
	7796	+ global $wpdb;
	7797	+ $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
	7798	+ $count = $wpdb->get_var("SELECT COUNT(*) FROM {$table_name}");
	7799	+ $kb_info['documents'] = $count ? $count . ' documents' : 'No documents';
	7800	+ }
	7801	+
	7802	+ wp_send_json_success($kb_info);
	7803	+}
	7804	+
	7805	+/**
	7806	+ * AJAX handler to start a completely fresh session (NEW - replaces old clear session)
	7807	+ */
	7808	+public function mxchat_start_fresh_session() {
	7809	+ // Verify nonce for security
	7810	+ if (!wp_verify_nonce($_POST['nonce'], 'mxchat_test_nonce')) {
	7811	+ wp_send_json_error(['message' => 'Invalid nonce']);
	7812	+ return;
	7813	+ }
	7814	+
	7815	+ // Only allow admin users
	7816	+ if (!current_user_can('administrator')) {
	7817	+ wp_send_json_error(['message' => 'Unauthorized']);
	7818	+ return;
	7819	+ }
	7820	+
	7821	+ $old_session_id = isset($_POST['old_session_id']) ? sanitize_text_field($_POST['old_session_id']) : '';
	7822	+ $new_session_id = isset($_POST['new_session_id']) ? sanitize_text_field($_POST['new_session_id']) : '';
	7823	+
	7824	+ if (empty($old_session_id)) {
	7825	+ wp_send_json_error(['message' => 'Old session ID required']);
	7826	+ return;
	7827	+ }
	7828	+
	7829	+ // If no new session ID provided, generate one
	7830	+ if (empty($new_session_id)) {
	7831	+ $new_session_id = 'mxchat_chat_' . substr(md5(uniqid()), 0, 9);
	7832	+ }
	7833	+
	7834	+ // Clear ALL data associated with the old session
	7835	+ $this->clear_complete_session_data($old_session_id);
	7836	+
	7837	+ // Initialize the new session
	7838	+ $this->initialize_fresh_session($new_session_id);
	7839	+
	7840	+ wp_send_json_success([
	7841	+ 'message' => 'Fresh session started successfully',
	7842	+ 'new_session_id' => $new_session_id,
	7843	+ 'old_session_id' => $old_session_id
	7844	+ ]);
	7845	+}
	7846	+
	7847	+/**
	7848	+ * Clear ALL data associated with a session (ENHANCED)
	7849	+ */
	7850	+private function clear_complete_session_data($session_id) {
	7851	+ // Clear chat history
	7852	+ delete_option("mxchat_history_{$session_id}");
	7853	+
	7854	+ // Clear chat mode
	7855	+ delete_option("mxchat_mode_{$session_id}");
	7856	+
	7857	+ // Clear any PDF/Word transients
	7858	+ $this->clear_pdf_transients($session_id);
	7859	+ if (method_exists($this, 'clear_word_transients')) {
	7860	+ $this->clear_word_transients($session_id);
	7861	+ }
	7862	+
	7863	+ // Clear agent-related data
	7864	+ delete_option("mxchat_channel_{$session_id}");
	7865	+ delete_option("mxchat_agent_name_{$session_id}");
	7866	+ delete_option("mxchat_email_{$session_id}");
	7867	+
	7868	+ // Clear any recommendation flow state
	7869	+ delete_option("mxchat_sr_flow_state_{$session_id}");
	7870	+
	7871	+ // Clear any cached embeddings or context
	7872	+ delete_transient("mxchat_context_{$session_id}");
	7873	+ delete_transient("mxchat_last_query_{$session_id}");
	7874	+
	7875	+ // Clear any testing data
	7876	+ delete_transient("mxchat_testing_data_{$session_id}");
	7877	+
	7878	+ // Clear any rate limiting data for this session
	7879	+ delete_transient("mxchat_rate_limit_{$session_id}");
	7880	+
	7881	+ // Clear any other session-specific transients
	7882	+ delete_transient("mxchat_waiting_for_pdf_url_{$session_id}");
	7883	+ delete_transient("mxchat_include_pdf_in_context_{$session_id}");
	7884	+ delete_transient("mxchat_include_word_in_context_{$session_id}");
	7885	+
	7886	+ //error_log("MxChat: Cleared all data for session: {$session_id}");
	7887	+}
	7888	+
	7889	+/**
	7890	+ * Initialize a fresh session with default data
	7891	+ */
	7892	+private function initialize_fresh_session($session_id) {
	7893	+ // Set default chat mode
	7894	+ update_option("mxchat_mode_{$session_id}", 'ai');
	7895	+
	7896	+ //error_log("MxChat: Initialized fresh session: {$session_id}");
	7897	+}
	7898	+
	7899	+/**
	7900	+ * Helper method to clear Word document transients (if you have Word support)
	7901	+ */
	7902	+private function clear_word_transients($session_id) {
	7903	+ delete_transient('mxchat_word_url_' . $session_id);
	7904	+ delete_transient('mxchat_word_filename_' . $session_id);
	7905	+ delete_transient('mxchat_word_embeddings_' . $session_id);
	7906	+ delete_transient('mxchat_include_word_in_context_' . $session_id);
	7907	+}
	7908	+
	7909	+/**
	7910	+ * Simplified testing data capture method (CLEANED UP)
	7911	+ */
	7912	+private function capture_testing_data($user_embedding, $message, $session_id) {
	7913	+ // Only capture for admin users
	7914	+ if (!current_user_can('administrator')) {
	7915	+ return null;
	7916	+ }
	7917	+
	7918	+ $testing_data = [
	7919	+ 'query' => $message,
	7920	+ 'timestamp' => time(),
	7921	+ 'top_matches' => [],
	7922	+ 'action_matches' => [] // Add action matches
	7923	+ ];
	7924	+
	7925	+ // Get similarity threshold
	7926	+ $similarity_threshold = isset($this->options['similarity_threshold'])
	7927	+ ? ((int) $this->options['similarity_threshold']) / 100
	7928	+ : 0.35;
	7929	+
	7930	+ $testing_data['similarity_threshold'] = $similarity_threshold;
	7931	+
	7932	+ // Use the real similarity analysis if available
	7933	+ if ($this->last_similarity_analysis !== null) {
	7934	+ $testing_data['knowledge_base_type'] = $this->last_similarity_analysis['knowledge_base_type'];
	7935	+ $testing_data['top_matches'] = $this->last_similarity_analysis['top_matches'];
	7936	+ $testing_data['total_documents_checked'] = $this->last_similarity_analysis['total_checked'] ?? 0;
	7937	+ } else {
	7938	+ // Fallback: determine knowledge base type
	7939	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	7940	+ $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1');
	7941	+
	7942	+ $testing_data['knowledge_base_type'] = $use_pinecone ? 'Pinecone' : 'WordPress Database';
	7943	+ }
	7944	+
	7945	+ // Include action analysis if available
	7946	+ if (isset($this->last_action_analysis) && !empty($this->last_action_analysis)) {
	7947	+ $testing_data['action_matches'] = $this->last_action_analysis;
	7948	+
	7949	+ // Clear it after capturing to avoid stale data
	7950	+ $this->last_action_analysis = null;
	7951	+ }
	7952	+
	7953	+ return $testing_data;
	7954	+}
	7955	+
	7956	+
	7957	+/**
	7958	+ * Track URL clicks from chatbot responses
	7959	+ */
	7960	+public function mxchat_track_url_click() {
	7961	+ // Verify nonce for security
	7962	+ if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
	7963	+ wp_send_json_error(['message' => 'Invalid nonce']);
	7964	+ wp_die();
	7965	+ }
	7966	+
	7967	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	7968	+ $clicked_url = isset($_POST['url']) ? esc_url_raw($_POST['url']) : '';
	7969	+ $message_context = isset($_POST['message_context']) ? sanitize_textarea_field($_POST['message_context']) : '';
	7970	+
	7971	+ if (empty($session_id) || empty($clicked_url)) {
	7972	+ wp_send_json_error(['message' => 'Missing required data']);
	7973	+ wp_die();
	7974	+ }
	7975	+
	7976	+ global $wpdb;
	7977	+ $table_name = $wpdb->prefix . 'mxchat_url_clicks';
	7978	+
	7979	+ // Insert click tracking record
	7980	+ $wpdb->insert(
	7981	+ $table_name,
	7982	+ [
	7983	+ 'session_id' => $session_id,
	7984	+ 'clicked_url' => $clicked_url,
	7985	+ 'message_context' => $message_context,
	7986	+ 'click_timestamp' => current_time('mysql', 1),
	7987	+ 'user_ip' => $_SERVER['REMOTE_ADDR'],
	7988	+ 'user_agent' => $_SERVER['HTTP_USER_AGENT']
	7989	+ ]
	7990	+ );
	7991	+
	7992	+ wp_send_json_success(['message' => 'Click tracked']);
	7993	+ wp_die();
	7994	+}
	7995	+
	7996	+/**
	7997	+ * Get URL click analytics for a session
	7998	+ */
	7999	+public function mxchat_get_url_clicks($session_id) {
	8000	+ global $wpdb;
	8001	+ $table_name = $wpdb->prefix . 'mxchat_url_clicks';
	8002	+
	8003	+ $clicks = $wpdb->get_results($wpdb->prepare(
	8004	+ "SELECT * FROM $table_name WHERE session_id = %s ORDER BY click_timestamp ASC",
	8005	+ $session_id
	8006	+ ));
	8007	+
	8008	+ return $clicks;
	8009	+}
	8010	+/**
	8011	+ * Track the originating page where chat was started
	8012	+ */
	8013	+public function mxchat_track_originating_page() {
	8014	+ // Verify nonce
	8015	+ if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
	8016	+ wp_send_json_error(['message' => 'Invalid nonce']);
	8017	+ wp_die();
	8018	+ }
	8019	+
	8020	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	8021	+ $page_url = isset($_POST['page_url']) ? esc_url_raw($_POST['page_url']) : '';
	8022	+ $page_title = isset($_POST['page_title']) ? sanitize_text_field($_POST['page_title']) : '';
	8023	+
	8024	+ if (empty($session_id)) {
	8025	+ wp_send_json_error(['message' => 'Missing session ID']);
	8026	+ wp_die();
	8027	+ }
	8028	+
	8029	+ global $wpdb;
	8030	+ $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
	8031	+
	8032	+ // Check if we've already tracked for this session
	8033	+ $existing = $wpdb->get_var($wpdb->prepare(
	8034	+ "SELECT COUNT(*) FROM $table_name
	8035	+ WHERE session_id = %s
	8036	+ AND originating_page_url IS NOT NULL",
	8037	+ $session_id
	8038	+ ));
	8039	+
	8040	+ if ($existing > 0) {
	8041	+ wp_send_json_success(['message' => 'Already tracked']);
	8042	+ wp_die();
	8043	+ }
	8044	+
	8045	+ // Update the first message in this session with originating page info
	8046	+ $wpdb->query($wpdb->prepare(
	8047	+ "UPDATE $table_name
	8048	+ SET originating_page_url = %s,
	8049	+ originating_page_title = %s
	8050	+ WHERE session_id = %s
	8051	+ ORDER BY timestamp ASC
	8052	+ LIMIT 1",
	8053	+ $page_url,
	8054	+ $page_title,
	8055	+ $session_id
	8056	+ ));
	8057	+
	8058	+ wp_send_json_success(['message' => 'Originating page tracked']);
	8059	+ wp_die();
	8060	+}
	8061	+
	8062	+/**
	8063	+ * Validate and clean URLs from AI response
	8064	+ * Removes any URLs that aren't in the knowledge base
	8065	+ *
	8066	+ * @param string $response_text The AI-generated response
	8067	+ * @param array $valid_urls Array of URLs from the knowledge base
	8068	+ * @return string Cleaned response with invalid URLs removed/flagged
	8069	+ */
	8070	+private function validate_and_clean_urls($response_text, $valid_urls) {
	8071	+ // DEBUG: Log what we're working with
	8072	+ error_log("=== MxChat URL Validation Debug ===");
	8073	+ error_log("Valid URLs count: " . count($valid_urls));
	8074	+ error_log("Valid URLs: " . print_r($valid_urls, true));
	8075	+ error_log("Response text length: " . strlen($response_text));
	8076	+ error_log("Response text preview: " . substr($response_text, 0, 500));
	8077	+
	8078	+ // If no valid URLs provided or empty response, return as-is
	8079	+ if (empty($valid_urls) || empty($response_text)) {
	8080	+ error_log("Validation skipped - empty valid_urls or response");
	8081	+ return $response_text;
	8082	+ }
	8083	+
	8084	+ // Extract all URLs from the AI response
	8085	+ // This regex matches http:// and https:// URLs
	8086	+ preg_match_all(
	8087	+ '#\bhttps?://[^\s<>"\')\]]+#i',
	8088	+ $response_text,
	8089	+ $matches
	8090	+ );
	8091	+
	8092	+ // If no URLs found in response, return as-is
	8093	+ if (empty($matches[0])) {
	8094	+ error_log("No URLs found in response");
	8095	+ return $response_text;
	8096	+ }
	8097	+
	8098	+ $found_urls = $matches[0];
	8099	+ $cleaned_response = $response_text;
	8100	+ $removed_count = 0;
	8101	+
	8102	+ // Normalize valid URLs for comparison (remove trailing slashes, fragments, etc.)
	8103	+ $normalized_valid_urls = array_map(function($url) {
	8104	+ // Remove trailing slash
	8105	+ $url = rtrim($url, '/');
	8106	+ // Remove URL fragments (#section)
	8107	+ $url = preg_replace('/#.*$/', '', $url);
	8108	+ // Remove trailing punctuation that might have been captured
	8109	+ $url = rtrim($url, '.,;:!?');
	8110	+ return $url;
	8111	+ }, $valid_urls);
	8112	+
	8113	+ error_log("Normalized valid URLs: " . print_r($normalized_valid_urls, true));
	8114	+
	8115	+ foreach ($found_urls as $found_url) {
	8116	+ // Clean up the found URL (remove trailing punctuation that might have been captured)
	8117	+ $clean_found_url = rtrim($found_url, '.,;:!?)');
	8118	+
	8119	+ // DEBUG: Log each URL being checked
	8120	+ error_log("Checking found URL: " . $found_url);
	8121	+
	8122	+ // Normalize for comparison
	8123	+ $normalized_found = rtrim($clean_found_url, '/');
	8124	+ $normalized_found = preg_replace('/#.*$/', '', $normalized_found);
	8125	+
	8126	+ error_log("Normalized found URL: " . $normalized_found);
	8127	+
	8128	+ // Check if this URL exists in our valid URLs list
	8129	+ $is_valid = false;
	8130	+
	8131	+ error_log("Starting validation checks for: " . $normalized_found);
	8132	+
	8133	+ // First, try exact match
	8134	+ if (in_array($normalized_found, $normalized_valid_urls)) {
	8135	+ $is_valid = true;
	8136	+ error_log("EXACT MATCH FOUND");
	8137	+ } else {
	8138	+ error_log("No exact match, checking variations...");
	8139	+ // If no exact match, check if it's a variation (with query params, etc.)
	8140	+ foreach ($normalized_valid_urls as $valid_url) {
	8141	+ error_log(" Comparing against valid URL: " . $valid_url);
	8142	+
	8143	+ // Check if the found URL starts with a valid URL (handles query params)
	8144	+ if (strpos($normalized_found, $valid_url) === 0) {
	8145	+ // Check what comes after the valid URL
	8146	+ $remainder = substr($normalized_found, strlen($valid_url));
	8147	+
	8148	+ // Only valid if:
	8149	+ // 1. Exact match (remainder is empty)
	8150	+ // 2. Query params (starts with ?)
	8151	+ // 3. Fragment (starts with #)
	8152	+ if (empty($remainder) || $remainder[0] === '?' || $remainder[0] === '#') {
	8153	+ $is_valid = true;
	8154	+ error_log(" MATCH: Found URL is valid variation of base URL");
	8155	+ break;
	8156	+ } else {
	8157	+ error_log(" NOT A MATCH: Found URL extends path beyond valid URL (remainder: " . $remainder . ")");
	8158	+ }
	8159	+ }
	8160	+ // Also check the reverse (in case valid URL has query params)
	8161	+ if (strpos($valid_url, $normalized_found) === 0) {
	8162	+ $is_valid = true;
	8163	+ error_log(" MATCH: Valid URL starts with found URL");
	8164	+ break;
	8165	+ }
	8166	+ }
	8167	+
	8168	+ if (!$is_valid) {
	8169	+ error_log("NO MATCH FOUND - URL should be removed");
	8170	+ }
	8171	+ }
	8172	+
	8173	+ // If URL is not valid, remove it from the response
	8174	+ if (!$is_valid) {
	8175	+ // Log the removal for debugging
	8176	+ error_log("MxChat: Removed hallucinated URL: " . $found_url);
	8177	+ error_log("MxChat: Valid URLs were: " . implode(', ', array_slice($normalized_valid_urls, 0, 5)));
	8178	+
	8179	+ $removed_count++;
	8180	+
	8181	+ // Check if URL is part of a markdown link: [text](url)
	8182	+ $markdown_pattern = '/\[([^\]]+)\]\(' . preg_quote($found_url, '/') . '\)/';
	8183	+ if (preg_match($markdown_pattern, $cleaned_response)) {
	8184	+ error_log("Found markdown link, removing but keeping text");
	8185	+ // Remove the markdown link but keep the text
	8186	+ $cleaned_response = preg_replace($markdown_pattern, '$1', $cleaned_response);
	8187	+ }
	8188	+ // Check if URL is part of an HTML link: <a href="url">text</a>
	8189	+ else if (preg_match('/<a[^>]*href=["\']' . preg_quote($found_url, '/') . '["\'][^>]*>(.*?)<\/a>/i', $cleaned_response, $link_match)) {
	8190	+ error_log("Found HTML link, removing but keeping text");
	8191	+ // Remove the HTML link but keep the text
	8192	+ $link_text = $link_match[1];
	8193	+ $cleaned_response = preg_replace(
	8194	+ '/<a[^>]*href=["\']' . preg_quote($found_url, '/') . '["\'][^>]*>.*?<\/a>/i',
	8195	+ $link_text,
	8196	+ $cleaned_response
	8197	+ );
	8198	+ }
	8199	+ // Otherwise just remove the bare URL
	8200	+ else {
	8201	+ error_log("Removing bare URL");
	8202	+ $cleaned_response = str_replace($found_url, '', $cleaned_response);
	8203	+ }
	8204	+ }
	8205	+ }
	8206	+
	8207	+ // Log summary if any URLs were removed
	8208	+ if ($removed_count > 0) {
	8209	+ error_log("MxChat: URL Validation Summary - Removed {$removed_count} hallucinated URL(s)");
	8210	+ } else {
	8211	+ error_log("MxChat: URL Validation Summary - No URLs removed, all were valid");
	8212	+ }
	8213	+
	8214	+ // Clean up any double spaces or awkward punctuation left behind
	8215	+ $cleaned_response = preg_replace('/\s+/', ' ', $cleaned_response);
	8216	+ $cleaned_response = preg_replace('/\s+([.,;:!?])/', '$1', $cleaned_response);
	8217	+
	8218	+ error_log("Final cleaned response: " . $cleaned_response);
	8219	+
	8220	+ return trim($cleaned_response);
	8221	+}
	8222	+
	8223	+/**
	8224	+ * AJAX handler to get current chat mode for a session
	8225	+ */
	8226	+public function mxchat_get_current_chat_mode() {
	8227	+ // Verify nonce for security
	8228	+ if (!isset($_POST['nonce']) || !wp_verify_nonce($_POST['nonce'], 'mxchat_chat_nonce')) {
	8229	+ wp_send_json_error(['message' => 'Invalid nonce']);
	8230	+ wp_die();
	8231	+ }
	8232	+
	8233	+ $session_id = isset($_POST['session_id']) ? sanitize_text_field($_POST['session_id']) : '';
	8234	+
	8235	+ if (empty($session_id)) {
	8236	+ wp_send_json_error(['message' => 'Session ID missing']);
	8237	+ wp_die();
	8238	+ }
	8239	+
	8240	+ // Get the current chat mode for this session
	8241	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	8242	+
	8243	+ wp_send_json_success([
	8244	+ 'chat_mode' => $chat_mode
	8245	+ ]);
	8246	+ wp_die();
	8247	+}
	8248	+
	8249	+
	8250	+
	8251	+}
	8252	+?>