← All changes | includes/class-mxchat-integrator.php +4273 -4101 2.0.3 → 2.1.5 View file →

		@@ -1,4101 +1,4273 @@
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		-
965		-// Helper function to clear PDF and Word document related transients
966		-private function clear_pdf_transients($session_id) {
967		- // PDF transients
968		- delete_transient('mxchat_pdf_url_' . $session_id);
969		- delete_transient('mxchat_pdf_embeddings_' . $session_id);
970		- delete_transient('mxchat_include_pdf_in_context_' . $session_id);
971		- delete_transient('mxchat_waiting_for_pdf_url_' . $session_id);
972		-
973		- // Word document transients
974		- delete_transient('mxchat_word_url_' . $session_id);
975		- delete_transient('mxchat_word_filename_' . $session_id);
976		- delete_transient('mxchat_word_embeddings_' . $session_id);
977		- delete_transient('mxchat_include_word_in_context_' . $session_id);
978		- delete_transient('mxchat_waiting_for_word_' . $session_id);
979		-}
980		-
981		-// New function to check intents and invoke the callback function
982		-private function mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id) {
983		- global $wpdb;
984		- $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
985		-
986		- //error_log("[MxChat] Checking intents for message: " . $message);
987		-
988		- // Generate the user embedding
989		- $user_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
990		- if (!is_array($user_embedding)) {
991		- //error_log("[MxChat] Failed to generate user embedding");
992		- return false;
993		- }
994		-
995		- // Fetch intents from the database
996		- $table_name = $wpdb->prefix . 'mxchat_intents';
997		- if ($chat_mode === 'agent') {
998		- $query = $wpdb->prepare(
999		- "SELECT * FROM $table_name WHERE callback_function = %s",
1000		- 'mxchat_handle_switch_to_chatbot_intent'
1001		- );
1002		- $intents = $wpdb->get_results($query);
1003		- } else {
1004		- $intents = $wpdb->get_results("SELECT * FROM $table_name");
1005		- }
1006		-
1007		- //error_log("[MxChat] Found " . count($intents) . " intents to check");
1008		-
1009		- if (empty($intents)) {
1010		- //error_log("[MxChat] No intents found in database");
1011		- return false;
1012		- }
1013		-
1014		- $highest_similarity = -INF;
1015		- $matched_intent = null;
1016		-
1017		- foreach ($intents as $intent) {
1018		- //error_log("[MxChat] Checking intent: " . $intent->intent_label . " (callback: " . $intent->callback_function . ")");
1019		-
1020		- $intent_embedding_serialized = $intent->embedding_vector;
1021		- $intent_embedding = $intent_embedding_serialized
1022		- ? unserialize($intent_embedding_serialized, ['allowed_classes' => false])
1023		- : null;
1024		-
1025		- if (!is_array($intent_embedding)) {
1026		- //error_log("[MxChat] Invalid embedding for intent: " . $intent->intent_label);
1027		- continue;
1028		- }
1029		-
1030		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $intent_embedding);
1031		- $intent_threshold = isset($intent->similarity_threshold) ? $intent->similarity_threshold : 0.85;
1032		-
1033		- //error_log("[MxChat] Similarity for {$intent->intent_label}: {$similarity} (threshold: {$intent_threshold})");
1034		-
1035		- if ($similarity >= $intent_threshold && $similarity > $highest_similarity) {
1036		- $highest_similarity = $similarity;
1037		- $matched_intent = $intent;
1038		- //error_log("[MxChat] New best match: {$intent->intent_label} with similarity {$similarity}");
1039		- }
1040		- }
1041		-
1042		- if ($matched_intent) {
1043		- //error_log("[MxChat] Invoking callback: " . $matched_intent->callback_function);
1044		-
1045		- // If the callback is a method on this instance (core callback), call it directly
1046		- if (method_exists($this, $matched_intent->callback_function)) {
1047		- $callback_result = call_user_func(
1048		- [$this, $matched_intent->callback_function],
1049		- $message,
1050		- $user_id,
1051		- $session_id,
1052		- $matched_intent
1053		- );
1054		- } else {
1055		- // Otherwise, use apply_filters for add-on callbacks
1056		- $callback_result = apply_filters(
1057		- $matched_intent->callback_function,
1058		- false, // default return value
1059		- $message,
1060		- $user_id,
1061		- $session_id,
1062		- $matched_intent
1063		- );
1064		- }
1065		-
1066		- //error_log("[MxChat] Callback result: " . print_r($callback_result, true));
1067		- if ($callback_result !== false) {
1068		- $this->fallbackResponse = $callback_result;
1069		- return true;
1070		- }
1071		- }
1072		-
1073		- //error_log("[MxChat] No matching intent found");
1074		- return false;
1075		-}
1076		-
1077		-
1078		-//verified good
1079		-public function mxchat_handle_order_history($message, $user_id, $session_id) {
1080		- if (!class_exists('WooCommerce')) {
1081		- $this->fallbackResponse['text'] = esc_html__("I can't access order information right now. The order system seems to be unavailable.", 'mxchat');
1082		- return true;
1083		- }
1084		-
1085		- $orderDetails = MxChat_WooCommerce::mxchat_fetch_user_orders_details('all');
1086		-
1087		- if (empty($orderDetails)) {
1088		- $this->fallbackResponse['text'] = esc_html__("I don't see any orders associated with your account. Are you logged in?", 'mxchat');
1089		- return true;
1090		- }
1091		-
1092		- // Generate AI prompt with context
1093		- $prompt = __("User asked about their orders:", 'mxchat') . " '{$message}'\n\n";
1094		- $prompt .= __("Order information:", 'mxchat') . "\n";
1095		- foreach ($orderDetails as $order) {
1096		- $items_list = array_map(function($item) {
1097		- return "{$item['name']} ({$item['quantity']})";
1098		- }, $order['items']);
1099		-
1100		- $prompt .= __("Order #", 'mxchat') . "{$order['order_id']}: {$order['formatted_total']} " . __("on", 'mxchat') . " {$order['date']}\n";
1101		- $prompt .= __("Items:", 'mxchat') . " " . implode(', ', $items_list) . "\n";
1102		- }
1103		-
1104		- $prompt .= __("\nProvide a natural, conversational response focusing on the specific information the user asked about. ", 'mxchat');
1105		- $prompt .= __("If they ask about a specific order or detail, provide just that information. ", 'mxchat');
1106		- $prompt .= __("If they ask about license keys or sensitive information, inform them to check their email or contact support.", 'mxchat');
1107		-
1108		- // Get AI response
1109		- $ai_response = $this->mxchat_call_ai_api($prompt);
1110		- $this->fallbackResponse['text'] = $ai_response['text'];
1111		-
1112		- return true;
1113		-}
1114		-
1115		-
1116		-public function mxchat_handle_product_inquiry($message, $user_id, $session_id) {
1117		- //error_log("PRODUCT INQUIRY START - Message: $message, User ID: $user_id");
1118		-
1119		- // Sanitize user ID
1120		- $sanitized_user_id = sanitize_key($user_id);
1121		- //error_log("Sanitized User ID: $sanitized_user_id");
1122		-
1123		- // Find product
1124		- $product_id = $this->find_product_in_message($message);
1125		- //error_log("Initial product ID from message: " . ($product_id ?? 'null'));
1126		-
1127		- // Check transient if no product found
1128		- if (!$product_id) {
1129		- $product_id = get_transient('mxchat_last_discussed_product_' . $sanitized_user_id);
1130		- //error_log("Product ID from transient: " . ($product_id ?? 'null'));
1131		- }
1132		-
1133		- // Handle product inquiries
1134		- if ($product_id && class_exists('WooCommerce')) {
1135		- $product = wc_get_product($product_id);
1136		- if ($product) {
1137		- //error_log("Found product: " . $product->get_name() . " (ID: $product_id)");
1138		-
1139		- // Prepare product details
1140		- $product_name = esc_html($product->get_name());
1141		- $product_price = $product->get_price_html();
1142		- $product_image_url = esc_url(wp_get_attachment_url($product->get_image_id()));
1143		- $product_url = esc_url(get_permalink($product_id));
1144		- $product_id_attr = esc_attr($product_id);
1145		-
1146		- // Get product description
1147		- $product_description = $product->get_description() ?: $product->get_short_description();
1148		-
1149		- // Log embeddings process
1150		- //error_log("Generating embedding for message: $message");
1151		- $user_message_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
1152		- //error_log("Finding relevant content for product inquiry");
1153		- $relevant_content = $this->mxchat_find_relevant_content($user_message_embedding);
1154		-
1155		- // Build AI prompt
1156		- $ai_prompt = esc_html__("You are a knowledgeable product assistant. ", 'mxchat');
1157		- $ai_prompt .= esc_html__("Respond to this user query: '{$message}'\n\n", 'mxchat');
1158		-
1159		- if (!empty($relevant_content)) {
1160		- $ai_prompt .= esc_html__("Relevant information from our knowledge base:\n{$relevant_content}\n\n", 'mxchat');
1161		- }
1162		-
1163		- $ai_prompt .= esc_html__("Product details:\n", 'mxchat');
1164		- $ai_prompt .= esc_html__("Name: {$product_name}\n", 'mxchat');
1165		- $ai_prompt .= esc_html__("Price: ", 'mxchat') . strip_tags($product_price) . "\n";
1166		- if ($product_description) {
1167		- $ai_prompt .= esc_html__("Description: {$product_description}\n", 'mxchat');
1168		- }
1169		-
1170		- $ai_prompt .= esc_html__("\nInstructions:\n", 'mxchat');
1171		- $ai_prompt .= esc_html__("1. Address the user's specific question or concern about the product\n", 'mxchat');
1172		- $ai_prompt .= esc_html__("2. Incorporate relevant information from our knowledge base if provided\n", 'mxchat');
1173		- $ai_prompt .= esc_html__("3. Highlight key product features that relate to their query\n", 'mxchat');
1174		- $ai_prompt .= esc_html__("4. Include a natural suggestion to check out the product\n", 'mxchat');
1175		- $ai_prompt .= esc_html__("5. Keep the response conversational and helpful\n", 'mxchat');
1176		-
1177		- //error_log("Sending AI prompt: " . $ai_prompt);
1178		-
1179		- // Build and log AI response
1180		- $ai_response = $this->mxchat_call_ai_api($ai_prompt);
1181		- //error_log("AI Response received for product inquiry: " . print_r($ai_response, true));
1182		-
1183		- // Generate and log product card
1184		- $product_card_html = <<<HTML
1185		-<div class="mxchat-product-card">
1186		- <a href="{$product_url}" target="_blank">
1187		- <img src="{$product_image_url}" alt="{$product_name}" class="mxchat-product-image" />
1188		- <h3 class="mxchat-product-name">{$product_name}</h3>
1189		- </a>
1190		- <div class="mxchat-product-price">{$product_price}</div>
1191		- <button class="mxchat-add-to-cart-button" data-product-id="{$product_id_attr}">Add to Cart</button>
1192		-</div>
1193		-HTML;
1194		-
1195		- // Save response and set transient
1196		- $this->productCardHtml = $product_card_html;
1197		- $this->fallbackResponse = [
1198		- 'text' => $ai_response['text'],
1199		- 'html' => $this->productCardHtml,
1200		- ];
1201		-
1202		- //error_log("Setting transient for product: $product_id with key: mxchat_last_discussed_product_$sanitized_user_id");
1203		- set_transient('mxchat_last_discussed_product_' . $sanitized_user_id, $product_id, HOUR_IN_SECONDS);
1204		-
1205		- // Verify transient was set
1206		- $verify_transient = get_transient('mxchat_last_discussed_product_' . $sanitized_user_id);
1207		- //error_log("Verification - Retrieved transient value: " . ($verify_transient ?? 'null'));
1208		-
1209		- return true;
1210		- }
1211		- }
1212		-
1213		- //error_log("PRODUCT INQUIRY END - No product found or WooCommerce not available");
1214		- return false;
1215		-}
1216		-
1217		-//verified good
1218		-public function mxchat_handle_email_capture($message, $user_id, $session_id) {
1219		- // Log the message safely
1220		- //error_log("Triggered email capture intent for message: " . sanitize_text_field($message));
1221		-
1222		- // Initiate email capture flow
1223		- $response = esc_html($this->options['triggered_phrase_response'] ?? esc_html__("Would you like to join our mailing list? Please provide your email below.", 'mxchat'));
1224		-
1225		- set_transient('mxchat_email_capture_' . $user_id, true, 5 * MINUTE_IN_SECONDS);
1226		- $this->mxchat_save_chat_message($session_id, 'bot', $response);
1227		-
1228		- // Respond to the user
1229		- wp_send_json(['message' => $response]);
1230		- wp_die();
1231		-}
1232		-
1233		-//very good
1234		-public function mxchat_generate_image($message, $user_id, $session_id) {
1235		- // Prepare a prompt for DALL-E
1236		- $prompt = esc_html__('Create an image of ', 'mxchat') . sanitize_text_field($message);
1237		-
1238		- // Use the existing OpenAI API key
1239		- $openai_api_key = sanitize_text_field($this->options['api_key']);
1240		-
1241		- // Call DALL-E to generate an image
1242		- $image_response = $this->mxchat_generate_dalle_image($prompt, $openai_api_key);
1243		-
1244		- // Check if the response contains an image URL
1245		- if (isset($image_response['imageUrl'])) {
1246		- $image_url = esc_url_raw($image_response['imageUrl']);
1247		-
1248		- // Construct the HTML with a CSS class instead of inline styles
1249		- $response_html = '<img src="' . esc_url($image_url) . '" alt="' . esc_attr__('Generated Image', 'mxchat') . '" class="mxchat-generated-image" />';
1250		-
1251		- $response_text = esc_html__('Here is the image I generated:', 'mxchat');
1252		- } else {
1253		- $response_text = esc_html__("I'm sorry, but I couldn't generate an image based on your request.", 'mxchat');
1254		- $response_html = '';
1255		- //error_log("DALL-E image generation error: " . esc_html($image_response['error'] ?? 'Unknown error.'));
1256		- }
1257		-
1258		- // Save both text and HTML responses
1259		- $this->mxchat_save_chat_message($session_id, 'bot', $response_text . "\n" . $response_html);
1260		-
1261		- // Prepare the response data
1262		- $response_data = [
1263		- 'message' => $response_text,
1264		- 'html' => $response_html,
1265		- 'image_url' => $image_url ?? '',
1266		- ];
1267		-
1268		- // Send the JSON response
1269		- header('Content-Type: application/json; charset=' . get_option('blog_charset'));
1270		- echo json_encode($response_data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
1271		- wp_die();
1272		-}
1273		-private function mxchat_generate_dalle_image($prompt, $api_key, $model = 'dall-e-3', $timeout = 60) {
1274		- $api_url = 'https://api.openai.com/v1/images/generations';
1275		- $body = json_encode([
1276		- 'prompt' => sanitize_text_field($prompt),
1277		- 'n' => 1,
1278		- 'size' => '1024x1024',
1279		- 'model' => sanitize_text_field($model),
1280		- ]);
1281		-
1282		- $args = [
1283		- 'body' => $body,
1284		- 'headers' => [
1285		- 'Content-Type' => 'application/json',
1286		- 'Authorization' => 'Bearer ' . sanitize_text_field($api_key),
1287		- ],
1288		- 'method' => 'POST',
1289		- 'timeout' => absint($timeout),
1290		- ];
1291		-
1292		- $response = wp_remote_post($api_url, $args);
1293		-
1294		- if (is_wp_error($response)) {
1295		- //error_log("DALL-E request failed: " . $response->get_error_message());
1296		- return ['error' => esc_html__('Error generating image: ', 'mxchat') . $response->get_error_message()];
1297		- }
1298		-
1299		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
1300		-
1301		- if (isset($response_body['data'][0]['url'])) {
1302		- return ['imageUrl' => esc_url_raw($response_body['data'][0]['url'])];
1303		- } else {
1304		- //error_log("DALL-E response error: " . wp_remote_retrieve_body($response));
1305		- return ['error' => esc_html__('Failed to generate image.', 'mxchat')];
1306		- }
1307		-}
1308		-
1309		-/**
1310		- * Handle web search requests.
1311		- *
1312		- * Sends the refined search query to the Brave Search API and displays neatly formatted,
1313		- * styled search results. Results are cached for performance.
1314		- *
1315		- * @since 1.0.0
1316		- * @param string $message The user's search query.
1317		- * @param string $user_id The user identifier.
1318		- * @param string $session_id The current session ID.
1319		- * @return void
1320		- */
1321		-public function mxchat_handle_search_request( $message, $user_id, $session_id ) {
1322		- // Step 1: Interpret and refine the search query
1323		- $refined_search_query = $this->mxchat_interpret_search_query( $message );
1324		-
1325		- if ( empty( $refined_search_query ) ) {
1326		- $this->fallbackResponse = array(
1327		- 'text' => esc_html__( 'I apologize, but could you please rephrase your search request?', 'mxchat' ),
1328		- );
1329		- return;
1330		- }
1331		-
1332		- // Retrieve and validate API settings
1333		- $options = get_option( 'mxchat_options' );
1334		- $api_key = isset( $options['brave_api_key'] ) ? sanitize_text_field( $options['brave_api_key'] ) : '';
1335		- $results_count = isset( $options['brave_results_count'] ) ? absint( $options['brave_results_count'] ) : 5;
1336		-
1337		- if ( empty( $api_key ) ) {
1338		- $this->fallbackResponse = array(
1339		- 'text' => esc_html__( 'Search functionality is temporarily unavailable. Please try again later.', 'mxchat' ),
1340		- );
1341		- return;
1342		- }
1343		-
1344		- // Build the API request URL
1345		- $api_url = add_query_arg(
1346		- array(
1347		- 'q' => rawurlencode( $refined_search_query ),
1348		- 'count' => $results_count,
1349		- 'text_decorations' => 'true',
1350		- 'rich_data' => 'true',
1351		- ),
1352		- 'https://api.search.brave.com/res/v1/web/search'
1353		- );
1354		-
1355		- // Attempt to retrieve cached results first
1356		- $transient_key = 'mxchat_search_' . md5( $refined_search_query );
1357		- $results = get_transient( $transient_key );
1358		-
1359		- if ( false === $results ) {
1360		- // Fetch new results from the Brave Search API
1361		- $response = wp_remote_get(
1362		- $api_url,
1363		- array(
1364		- 'headers' => array(
1365		- 'Accept' => 'application/json',
1366		- 'Accept-Encoding' => 'gzip',
1367		- 'X-Subscription-Token'=> $api_key,
1368		- ),
1369		- 'timeout' => 10,
1370		- )
1371		- );
1372		-
1373		- if ( is_wp_error( $response ) ) {
1374		- $this->fallbackResponse = array(
1375		- 'text' => esc_html__( 'I encountered an error while searching. Please try again.', 'mxchat' ),
1376		- );
1377		- return;
1378		- }
1379		-
1380		- $results = json_decode( wp_remote_retrieve_body( $response ), true );
1381		-
1382		- if ( json_last_error() !== JSON_ERROR_NONE ) {
1383		- $this->fallbackResponse = array(
1384		- 'text' => esc_html__( 'I received an invalid response from the search service.', 'mxchat' ),
1385		- );
1386		- return;
1387		- }
1388		-
1389		- // Cache results for one hour
1390		- set_transient( $transient_key, $results, HOUR_IN_SECONDS );
1391		- }
1392		-
1393		- // Process and display results
1394		- if ( ! empty( $results['web']['results'] ) && is_array( $results['web']['results'] ) ) {
1395		- $html = $this->generate_search_results_html( $results['web']['results'], $refined_search_query );
1396		-
1397		- // Only return HTML (no large text summary)
1398		- $this->fallbackResponse = array(
1399		- 'html' => $html,
1400		- );
1401		-
1402		- // Save to chat history
1403		- $this->mxchat_save_chat_message( $session_id, 'bot', $html );
1404		- } else {
1405		- $this->fallbackResponse = array(
1406		- 'text' => sprintf(
1407		- esc_html__( 'I couldn\'t find any relevant results for "%s". Would you like to try different search terms?', 'mxchat' ),
1408		- esc_html( $refined_search_query )
1409		- ),
1410		- );
1411		- }
1412		-}
1413		-
1414		-
1415		-/**
1416		- * Format search results into a natural text summary.
1417		- *
1418		- * @since 1.0.0
1419		- * @param array $results The search results from the API.
1420		- * @param string $query The original search query.
1421		- * @return string The text summary of the top results.
1422		- */
1423		-private function format_search_results( $results, $query ) {
1424		- $summary = sprintf(
1425		- esc_html__( 'Here are the most relevant results for "%s":', 'mxchat' ),
1426		- esc_html( $query )
1427		- ) . "\n\n";
1428		-
1429		- $max_results = min( count( $results ), 3 );
1430		- for ( $i = 0; $i < $max_results; $i++ ) {
1431		- $result = $results[ $i ];
1432		- $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
1433		- $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
1434		-
1435		- // Append title and description to the summary
1436		- $summary .= sprintf(
1437		- "%s\n%s\n\n",
1438		- esc_html( $title ),
1439		- esc_html( $description )
1440		- );
1441		- }
1442		-
1443		- return $summary;
1444		-}
1445		-
1446		-/**
1447		- * Generate HTML markup for search results.
1448		- *
1449		- * @since 1.0.0
1450		- * @param array $results The search results from the API.
1451		- * @param string $query The user-refined query.
1452		- * @return string The HTML markup for displaying the results.
1453		- */
1454		-private function generate_search_results_html( $results, $query ) {
1455		- ob_start();
1456		- ?>
1457		- <div class="mxchat-search-results">
1458		- <?php foreach ( $results as $result ) :
1459		- $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
1460		- $url = isset( $result['url'] ) ? esc_url( $result['url'] ) : '#';
1461		- $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
1462		- $favicon = isset( $result['meta_url']['favicon'] ) ? esc_url( $result['meta_url']['favicon'] ) : '';
1463		- $thumbnail = isset( $result['thumbnail']['src'] ) ? esc_url( $result['thumbnail']['src'] ) : '';
1464		- $domain = parse_url( $url, PHP_URL_HOST );
1465		- ?>
1466		- <div class="mxchat-search-item">
1467		- <div class="mxchat-search-header">
1468		- <?php if ( $favicon ) : ?>
1469		- <img
1470		- src="<?php echo esc_url( $favicon ); ?>"
1471		- class="mxchat-site-icon"
1472		- alt="<?php echo esc_attr__( 'Site icon', 'mxchat' ); ?>"
1473		- width="16"
1474		- height="16"
1475		- />
1476		- <?php endif; ?>
1477		- <div class="mxchat-site-url"><?php echo esc_html( $domain ); ?></div>
1478		- </div>
1479		-
1480		- <div class="mxchat-search-content">
1481		- <h3 class="mxchat-search-title">
1482		- <a href="<?php echo esc_url( $url ); ?>"
1483		- target="_blank"
1484		- rel="noopener noreferrer"
1485		- >
1486		- <?php echo esc_html( $title ); ?>
1487		- </a>
1488		- </h3>
1489		-
1490		- <?php if ( $thumbnail ) : ?>
1491		- <div class="mxchat-search-thumbnail">
1492		- <img
1493		- src="<?php echo esc_url( $thumbnail ); ?>"
1494		- alt="<?php echo esc_attr__( 'Thumbnail image', 'mxchat' ); ?>"
1495		- loading="lazy"
1496		- />
1497		- </div>
1498		- <?php endif; ?>
1499		-
1500		- <div class="mxchat-search-description">
1501		- <?php echo esc_html( $description ); ?>
1502		- </div>
1503		- </div>
1504		- </div>
1505		- <?php endforeach; ?>
1506		- </div>
1507		- <?php
1508		- return ob_get_clean();
1509		-}
1510		-
1511		-
1512		-//very good
1513		-public function mxchat_handle_image_search_request($message, $user_id, $session_id) {
1514		-
1515		- // Step 1: Interpret the search query for better results
1516		- $refined_search_query = $this->mxchat_interpret_search_query($message);
1517		-
1518		-
1519		- // If no query was interpreted, return a fallback message
1520		- if (empty($refined_search_query)) {
1521		- $this->fallbackResponse = [
1522		- 'text' => __("I'm sorry, I couldn't interpret your search query. Please specify what you'd like to see images of.", 'mxchat'),
1523		- 'html' => "",
1524		- ];
1525		- return;
1526		- }
1527		-
1528		- // Brave API URL
1529		- $api_url = 'https://api.search.brave.com/res/v1/images/search';
1530		-
1531		- // Retrieve Brave API settings
1532		- $options = get_option('mxchat_options');
1533		- $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
1534		-
1535		- if (empty($api_key)) {
1536		-/*
1537		- if (defined('WP_DEBUG') && WP_DEBUG) {
1538		- error_log("Brave API key is missing.");
1539		- }
1540		-*/
1541		-
1542		- $this->fallbackResponse = [
1543		- 'text' => __("API key is not configured. Please set it in the Brave Search Settings.", 'mxchat'),
1544		- 'html' => "",
1545		- ];
1546		- return;
1547		- }
1548		-
1549		- $image_count = isset($options['brave_image_count']) ? intval($options['brave_image_count']) : 4;
1550		- $safe_search = isset($options['brave_safe_search']) ? sanitize_text_field($options['brave_safe_search']) : 'strict';
1551		-
1552		- // Append query parameters based on settings
1553		- $api_url = add_query_arg([
1554		- 'q' => rawurlencode($refined_search_query),
1555		- 'count' => $image_count,
1556		- 'safesearch' => $safe_search,
1557		- ], $api_url);
1558		-
1559		-/*
1560		- // Log the final API URL for the search
1561		- if (defined('WP_DEBUG') && WP_DEBUG) {
1562		- error_log("Final API URL for Brave Image Search: " . esc_url_raw($api_url));
1563		- }
1564		-*/
1565		-
1566		-
1567		- // Implement caching
1568		- $transient_key = 'mxchat_image_search_' . md5($refined_search_query);
1569		- $body = get_transient($transient_key);
1570		-
1571		- if (false === $body) {
1572		- $args = [
1573		- 'headers' => [
1574		- 'Accept' => 'application/json',
1575		- 'Accept-Encoding' => 'gzip',
1576		- 'X-Subscription-Token' => $api_key,
1577		- ],
1578		- 'timeout' => 10,
1579		- ];
1580		-
1581		- $response = wp_remote_get($api_url, $args);
1582		-
1583		- if (is_wp_error($response)) {
1584		-/*
1585		- if (defined('WP_DEBUG') && WP_DEBUG) {
1586		- error_log("Brave Image API request failed: " . $response->get_error_message());
1587		- }
1588		-*/
1589		-
1590		- $this->fallbackResponse = [
1591		- 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
1592		- 'html' => "",
1593		- ];
1594		- return;
1595		- }
1596		-
1597		- $body = json_decode(wp_remote_retrieve_body($response), true);
1598		- set_transient($transient_key, $body, HOUR_IN_SECONDS);
1599		- }
1600		-
1601		- // Process the API response
1602		- if (isset($body['results']) && is_array($body['results']) && count($body['results']) > 0) {
1603		- $html_output = '<div class="mxchat-image-gallery">';
1604		-
1605		- foreach ($body['results'] as $image) {
1606		- $image_url = isset($image['url']) ? esc_url($image['url']) : '';
1607		- $thumbnail_url = isset($image['thumbnail']['src']) ? esc_url($image['thumbnail']['src']) : '';
1608		- $title = isset($image['title']) ? esc_html($image['title']) : esc_html__('Image', 'mxchat');
1609		-
1610		- if ($image_url && $thumbnail_url) {
1611		- $html_output .= '<div class="mxchat-image-item">';
1612		- $html_output .= '<strong class="mxchat-image-title">' . $title . '</strong>';
1613		- $html_output .= '<a href="' . $image_url . '" target="_blank" rel="noopener noreferrer" class="mxchat-image-link">';
1614		- $html_output .= '<img src="' . $thumbnail_url . '" alt="' . $title . '" class="mxchat-image-thumbnail">';
1615		- $html_output .= '</a></div>';
1616		- }
1617		- }
1618		-
1619		- $html_output .= '</div>';
1620		-
1621		- $this->fallbackResponse = [
1622		- 'text' => "",
1623		- 'html' => $html_output,
1624		- ];
1625		-
1626		- // Save response in chat history
1627		- $this->mxchat_save_chat_message($session_id, 'bot', $html_output);
1628		-
1629		- } else {
1630		-/*
1631		- if (defined('WP_DEBUG') && WP_DEBUG) {
1632		- error_log("Brave Image API response did not contain expected data structure or was empty: " . print_r($body, true));
1633		- }
1634		-*/
1635		-
1636		- $this->fallbackResponse = [
1637		- 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
1638		- 'html' => "",
1639		- ];
1640		- }
1641		-}
1642		-public function mxchat_interpret_search_query($user_query) {
1643		- $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');
1644		-
1645		- // Retrieve OpenAI API key using 'api_key' as the option key
1646		- $api_key = isset($this->options['api_key']) ? sanitize_text_field($this->options['api_key']) : sanitize_text_field(get_option('mxchat_options')['api_key']);
1647		-
1648		- /*
1649		- // Log the API key check, without exposing the key
1650		- if (defined('WP_DEBUG') && WP_DEBUG) {
1651		- error_log("Retrieved OpenAI API Key: " . ($api_key ? "Present" : "Missing"));
1652		- }
1653		- */
1654		-
1655		- if (empty($api_key)) {
1656		- //error_log("OpenAI API key is missing.");
1657		- return sanitize_text_field($user_query); // Default to the original query if API key is missing
1658		- }
1659		-
1660		- $url = 'https://api.openai.com/v1/chat/completions';
1661		- $args = [
1662		- 'headers' => [
1663		- 'Authorization' => 'Bearer ' . $api_key,
1664		- 'Content-Type' => 'application/json',
1665		- ],
1666		- 'body' => wp_json_encode([
1667		- 'model' => 'gpt-3.5-turbo',
1668		- 'messages' => [
1669		- ['role' => 'system', 'content' => $system_prompt],
1670		- ['role' => 'user', 'content' => sanitize_text_field($user_query)],
1671		- ],
1672		- 'temperature' => 0.2,
1673		- 'max_tokens' => 20,
1674		- ]),
1675		- 'method' => 'POST',
1676		- ];
1677		-
1678		- $response = wp_remote_post($url, $args);
1679		-
1680		- if (is_wp_error($response)) {
1681		- //error_log("OpenAI request failed: " . $response->get_error_message());
1682		- return sanitize_text_field($user_query); // Fallback to the original query if there's an error
1683		- }
1684		-
1685		- $body = json_decode(wp_remote_retrieve_body($response), true);
1686		-
1687		- // Check for a valid response and sanitize output
1688		- if (isset($body['choices'][0]['message']['content'])) {
1689		- $interpreted_query = sanitize_text_field(trim($body['choices'][0]['message']['content']));
1690		-
1691		- /*
1692		- // Log the interpreted query for debugging
1693		- if (defined('WP_DEBUG') && WP_DEBUG) {
1694		- error_log("Interpreted search query: " . $interpreted_query);
1695		- }
1696		- */
1697		-
1698		- return $interpreted_query;
1699		- } else {
1700		- //error_log("Unexpected API response format: " . print_r($body, true));
1701		- return sanitize_text_field($user_query);
1702		- }
1703		-}
1704		-
1705		-public function mxchat_handle_add_to_cart_intent($message, $user_id, $session_id) {
1706		- //error_log("ADD TO CART START - Message: $message, User ID: $user_id");
1707		-
1708		- if (!class_exists('WooCommerce')) {
1709		- //error_log("WooCommerce not available");
1710		- return $this->generate_intent_response([
1711		- 'intent' => 'add_to_cart',
1712		- 'status' => 'error',
1713		- 'reason' => esc_html__('woocommerce_not_available', 'mxchat')
1714		- ], $session_id);
1715		- }
1716		-
1717		- $sanitized_user_id = sanitize_key($user_id);
1718		- // error_log("Sanitized User ID: $sanitized_user_id");
1719		- $product_id = null;
1720		-
1721		- // If button click, use transient
1722		- if ($message === '!addtocart') {
1723		- //error_log("Button click detected - using transient");
1724		- $product_id = get_transient('mxchat_last_discussed_product_' . $sanitized_user_id);
1725		- //error_log("Product ID from transient: " . ($product_id ?? 'null'));
1726		- } else {
1727		- // For text commands, search message first
1728		- //error_log("Text command detected - searching message first");
1729		- $product_id = $this->find_product_in_message($message);
1730		- //error_log("Product ID from message search: " . ($product_id ?? 'null'));
1731		-
1732		- // Only use transient as fallback if no product found in message
1733		- if (!$product_id) {
1734		- //error_log("No product found in message, checking transient as fallback");
1735		- $product_id = get_transient('mxchat_last_discussed_product_' . $sanitized_user_id);
1736		- //error_log("Product ID from transient fallback: " . ($product_id ?? 'null'));
1737		- }
1738		- }
1739		-
1740		- // Handle no product found
1741		- if (!$product_id) {
1742		- //error_log("No product ID found through any method");
1743		- return $this->generate_intent_response([
1744		- 'intent' => 'add_to_cart',
1745		- 'status' => 'error',
1746		- 'reason' => esc_html__('no_product_context', 'mxchat'),
1747		- 'action_needed' => esc_html__('request_product_name', 'mxchat'),
1748		- 'searched_message' => $message
1749		- ], $session_id);
1750		- }
1751		-
1752		- // Get and verify product
1753		- $product = wc_get_product($product_id);
1754		- if (!$product) {
1755		- //error_log("Product not found with ID: $product_id");
1756		- return $this->generate_intent_response([
1757		- 'intent' => 'add_to_cart',
1758		- 'status' => 'error',
1759		- 'reason' => esc_html__('product_not_found', 'mxchat'),
1760		- 'product_id' => $product_id
1761		- ], $session_id);
1762		- }
1763		-
1764		- //error_log("Found product: " . $product->get_name() . " (ID: $product_id)");
1765		-
1766		- // Add to cart
1767		- $added = WC()->cart->add_to_cart($product_id);
1768		- if ($added) {
1769		- //error_log("Successfully added to cart: " . $product->get_name());
1770		- return $this->generate_intent_response([
1771		- 'intent' => 'add_to_cart',
1772		- 'status' => 'success',
1773		- 'product' => [
1774		- 'name' => $product->get_name(),
1775		- 'id' => $product_id
1776		- ],
1777		- 'cart_url' => wc_get_cart_url(),
1778		- 'available_actions' => [
1779		- esc_html__('view_cart', 'mxchat'),
1780		- esc_html__('checkout', 'mxchat'),
1781		- esc_html__('continue_shopping', 'mxchat')
1782		- ]
1783		- ], $session_id);
1784		- } else {
1785		- //error_log("Failed to add to cart: " . $product->get_name());
1786		- return $this->generate_intent_response([
1787		- 'intent' => 'add_to_cart',
1788		- 'status' => 'error',
1789		- 'reason' => esc_html__('add_to_cart_failed', 'mxchat'),
1790		- 'product' => [
1791		- 'name' => $product->get_name(),
1792		- 'id' => $product_id
1793		- ]
1794		- ], $session_id);
1795		- }
1796		-}
1797		-private function find_product_in_message($message) {
1798		- global $wpdb;
1799		-
1800		- // Get embedding for the search query
1801		- $query_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
1802		- if (!is_array($query_embedding)) {
1803		- return null;
1804		- }
1805		-
1806		- // Get relevant content as string
1807		- $relevant_content = $this->mxchat_find_relevant_products($query_embedding);
1808		- if (empty($relevant_content)) {
1809		- // Return null to indicate no results and set fallback response
1810		- $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');
1811		- return null;
1812		- }
1813		-
1814		- // Extract product URLs from the content
1815		- preg_match_all('/https?:\/\/[^\s<>"\']+?\/product\/[^\s<>"\']+/', $relevant_content, $matches);
1816		-
1817		- if (!empty($matches[0])) {
1818		- // Try each URL found
1819		- foreach ($matches[0] as $url) {
1820		- // Clean the URL
1821		- $url = rtrim($url, '/."\']');
1822		-
1823		- // Get the product slug
1824		- $path = parse_url($url, PHP_URL_PATH);
1825		- $slug = basename(rtrim($path, '/'));
1826		-
1827		- // Find product by slug
1828		- $args = array(
1829		- 'post_type' => 'product',
1830		- 'post_status' => 'publish',
1831		- 'name' => $slug,
1832		- 'posts_per_page' => 1
1833		- );
1834		-
1835		- $products = get_posts($args);
1836		-
1837		- if (!empty($products)) {
1838		- $product_id = $products[0]->ID;
1839		- $product = wc_get_product($product_id);
1840		-
1841		- if ($product && $product->is_purchasable()) {
1842		- return $product_id;
1843		- }
1844		- }
1845		- }
1846		- }
1847		-
1848		- // Fallback: Look for product names in the content
1849		- $products = wc_get_products([
1850		- 'status' => 'publish',
1851		- 'limit' => -1,
1852		- 'return' => 'all'
1853		- ]);
1854		-
1855		- foreach ($products as $product) {
1856		- $name = $product->get_name();
1857		- if (stripos($relevant_content, $name) !== false) {
1858		- if ($product->is_purchasable()) {
1859		- return $product->get_id();
1860		- }
1861		- }
1862		- }
1863		-
1864		- // If no product is found after all checks, set the fallback response
1865		- $this->fallbackResponse['text'] = esc_html__("I couldn't find any relevant products based on your query. Try to be more specific", 'mxchat');
1866		- return null;
1867		-}
1868		-
1869		-// New method to handle intent responses
1870		-private function generate_intent_response($context_content, $session_id) {
1871		- // Convert the context array to a structured string for the AI
1872		- $context_string = $this->format_intent_context($context_content);
1873		-
1874		- // Generate AI response using the context
1875		- $response = $this->mxchat_generate_response(
1876		- $context_string,
1877		- $this->options['api_key'],
1878		- $this->options['xai_api_key'],
1879		- $this->options['claude_api_key'],
1880		- $this->options['deepseek_api_key'],
1881		- $this->mxchat_fetch_conversation_history_for_ai($session_id)
1882		- );
1883		-
1884		- $this->fallbackResponse['text'] = $response;
1885		- return true;
1886		-}
1887		-// Helper method to format intent context
1888		-private function format_intent_context($context) {
1889		- $context_string = esc_html__("INTENT CONTEXT:\n", 'mxchat');
1890		-
1891		- switch ($context['intent']) {
1892		- case 'add_to_cart':
1893		- if ($context['status'] === 'success') {
1894		- $context_string .= esc_html__("Action: Successfully added product to cart\n", 'mxchat');
1895		- $context_string .= sprintf(esc_html__("Product: %s\n", 'mxchat'), $context['product']['name']);
1896		- $context_string .= esc_html__("Available actions: ", 'mxchat') . implode(', ', $context['available_actions']) . "\n";
1897		- $context_string .= sprintf(esc_html__("Cart URL: %s\n", 'mxchat'), $context['cart_url']);
1898		- $context_string .= esc_html__("\nPlease inform the user of the successful addition and their available options.", 'mxchat');
1899		- } else {
1900		- $context_string .= esc_html__("Action: Failed to add product to cart\n", 'mxchat');
1901		- $context_string .= sprintf(esc_html__("Reason: %s\n", 'mxchat'), $context['reason']);
1902		- switch ($context['reason']) {
1903		- case 'woocommerce_not_available':
1904		- $context_string .= esc_html__("\nPlease inform the user that shopping features are not available.", 'mxchat');
1905		- break;
1906		- case 'no_product_context':
1907		- $context_string .= esc_html__("\nPlease ask the user to specify which product they want to add.", 'mxchat');
1908		- break;
1909		- case 'product_not_found':
1910		- $context_string .= esc_html__("\nPlease inform the user that the product couldn't be found and ask them to try again.", 'mxchat');
1911		- break;
1912		- case 'add_to_cart_failed':
1913		- $context_string .= esc_html__("\nPlease apologize to the user and suggest they try again or ask for assistance.", 'mxchat');
1914		- break;
1915		- }
1916		- }
1917		- break;
1918		- }
1919		-
1920		- return $context_string;
1921		-}
1922		-
1923		-
1924		-public function mxchat_handle_checkout_intent($message, $user_id, $session_id) {
1925		- if (!class_exists('WooCommerce')) {
1926		- $this->fallbackResponse['text'] = esc_html__("I apologize, but the checkout feature isn't available at the moment.", 'mxchat');
1927		- return true;
1928		- }
1929		-
1930		- // Check if cart has items
1931		- if (WC()->cart->is_empty()) {
1932		- $this->fallbackResponse['text'] = esc_html__("Your cart is empty at the moment. Would you like to see our products?", 'mxchat');
1933		- return true;
1934		- }
1935		-
1936		- // Get cart summary
1937		- $cart_count = WC()->cart->get_cart_contents_count();
1938		- $cart_total = WC()->cart->get_total();
1939		-
1940		- // Get and validate checkout URL
1941		- $checkout_url = wc_get_checkout_url();
1942		- if (!$checkout_url) {
1943		- $this->fallbackResponse['text'] = esc_html__("I'm having trouble accessing the checkout page. Please try again in a moment.", 'mxchat');
1944		- return true;
1945		- }
1946		-
1947		- wp_send_json([
1948		- 'text' => sprintf(
1949		- esc_html__("You have %d item%s in your cart totaling %s. I'll redirect you to checkout now.", 'mxchat'),
1950		- $cart_count,
1951		- $cart_count > 1 ? esc_html__('s', 'mxchat') : '',
1952		- strip_tags($cart_total)
1953		- ),
1954		- 'redirect_url' => esc_url_raw($checkout_url)
1955		- ]);
1956		- wp_die();
1957		-}
1958		-
1959		-
1960		-//very good
1961		-private function add_email_to_loops($email) {
1962		- // Sanitize the email
1963		- $email = sanitize_email($email);
1964		-
1965		- // Retrieve and sanitize options
1966		- $api_key = isset($this->options['loops_api_key']) ? sanitize_text_field($this->options['loops_api_key']) : '';
1967		- $mailing_list_id = isset($this->options['loops_mailing_list']) ? sanitize_text_field($this->options['loops_mailing_list']) : '';
1968		-
1969		- // Check for missing API key or mailing list ID
1970		- if (empty($api_key) || empty($mailing_list_id)) {
1971		- //error_log(esc_html__('Loops API key or mailing list ID is missing.', 'mxchat'));
1972		- return;
1973		- }
1974		-
1975		- $data = array(
1976		- 'email' => $email,
1977		- 'subscribed' => true,
1978		- 'source' => __('MxChat AI Chatbot', 'mxchat'),
1979		- 'mailingLists' => array($mailing_list_id => true),
1980		- );
1981		-
1982		- $url = 'https://app.loops.so/api/v1/contacts/create';
1983		- $args = array(
1984		- 'body' => wp_json_encode($data),
1985		- 'headers' => array(
1986		- 'Authorization' => 'Bearer ' . $api_key,
1987		- 'Content-Type' => 'application/json',
1988		- ),
1989		- 'method' => 'POST',
1990		- 'timeout' => 45,
1991		- );
1992		-
1993		- $response = wp_remote_post($url, $args);
1994		-
1995		- // Handle errors in the API request
1996		- if (is_wp_error($response)) {
1997		- //error_log(esc_html__('Error adding email to Loops: ', 'mxchat') . $response->get_error_message());
1998		- return;
1999		- }
2000		-
2001		- // Check for non-200 HTTP responses
2002		- $response_code = wp_remote_retrieve_response_code($response);
2003		- if ($response_code != 200) {
2004		- $response_body = wp_remote_retrieve_body($response);
2005		- //error_log(esc_html__('Loops API responded with code ', 'mxchat') . $response_code . ': ' . $response_body);
2006		- }
2007		-}
2008		-
2009		-public function mxchat_handle_pdf_discussion($message, $user_id, $session_id) {
2010		- // Get the maximum number of pages allowed from admin settings
2011		- $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
2012		-
2013		- // Retrieve options for dynamic texts
2014		- $trigger_text = $this->options['pdf_intent_trigger_text'] ?? __("Please provide the URL to the PDF you'd like to discuss.", 'mxchat');
2015		- $success_text = $this->options['pdf_intent_success_text'] ?? __("I've processed the PDF. What questions do you have about it?", 'mxchat');
2016		- $error_text = $this->options['pdf_intent_error_text'] ?? __("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
2017		-
2018		- // Check for explicit request for new PDF
2019		- $new_pdf_requested = stripos($message, 'new') !== false ||
2020		- stripos($message, 'another') !== false ||
2021		- stripos($message, 'different') !== false;
2022		-
2023		- // If user mentions adding/reading a PDF, set waiting flag
2024		- if (stripos($message, 'pdf') !== false ||
2025		- stripos($message, 'document') !== false ||
2026		- stripos($message, 'read') !== false) {
2027		- set_transient('mxchat_waiting_for_pdf_url_' . $session_id, true, HOUR_IN_SECONDS);
2028		- $this->fallbackResponse['text'] = $trigger_text;
2029		- return;
2030		- }
2031		-
2032		- // If we're waiting for a URL or user requested new PDF
2033		- if ($new_pdf_requested || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
2034		- if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
2035		- // Process URL... (rest of your existing URL processing code)
2036		- } else {
2037		- $this->fallbackResponse['text'] = $trigger_text;
2038		- }
2039		- return;
2040		- }
2041		-
2042		- // Default to proceeding with conversation if no specific PDF action is needed
2043		- $this->fallbackResponse['text'] = '';
2044		-}
2045		-private function fetch_and_split_pdf_pages($pdf_source, $max_pages) {
2046		- $upload_dir = wp_upload_dir();
2047		- $temp_file = null;
2048		-
2049		- try {
2050		- // Handle URL vs local file
2051		- if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
2052		- // Validate and download the file from URL
2053		- $temp_file = wp_tempnam($pdf_source); // Safe temporary file name
2054		- $response = wp_remote_get($pdf_source, ['timeout' => 60]);
2055		-
2056		- if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
2057		- //error_log(esc_html__("Failed to download PDF. Error: ", 'mxchat') . print_r($response, true));
2058		- return false;
2059		- }
2060		-
2061		- file_put_contents($temp_file, wp_remote_retrieve_body($response));
2062		-
2063		- // Validate that the downloaded file is a PDF
2064		- $mime_type = mime_content_type($temp_file);
2065		- if ($mime_type !== 'application/pdf') {
2066		- //error_log(esc_html__("Invalid MIME type detected for PDF: ", 'mxchat') . $mime_type);
2067		- unlink($temp_file);
2068		- return false;
2069		- }
2070		- } else {
2071		- // For local files, use the provided path directly
2072		- $temp_file = $pdf_source;
2073		- }
2074		-
2075		- // Parse and process the PDF
2076		- $parser = new \Smalot\PdfParser\Parser();
2077		- $pdf = $parser->parseFile($temp_file);
2078		- $pages = $pdf->getPages();
2079		-
2080		- if (count($pages) > $max_pages) {
2081		- //error_log(esc_html__("PDF exceeds the maximum allowed pages: ", 'mxchat') . count($pages));
2082		- if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
2083		- unlink($temp_file);
2084		- }
2085		- return esc_html__('too_many_pages', 'mxchat');
2086		- }
2087		-
2088		- $embeddings = [];
2089		- foreach ($pages as $page_number => $page) {
2090		- $text = $page->getText();
2091		-
2092		- // Ensure text is non-empty before generating embeddings
2093		- if (empty(trim($text))) {
2094		- //error_log(esc_html__("Skipping empty page: ", 'mxchat') . ($page_number + 1));
2095		- continue;
2096		- }
2097		-
2098		- $embedding = $this->mxchat_generate_embedding(
2099		- esc_html__("Page ", 'mxchat') . ($page_number + 1) . ": " . $text,
2100		- $this->options['api_key']
2101		- );
2102		-
2103		- if ($embedding) {
2104		- $embeddings[] = [
2105		- 'page_number' => $page_number + 1,
2106		- 'embedding' => $embedding,
2107		- 'text' => $text,
2108		- ];
2109		- } else {
2110		- //error_log(esc_html__("Failed to generate embedding for page ", 'mxchat') . ($page_number + 1));
2111		- }
2112		- }
2113		-
2114		- // Clean up downloaded file if it was from URL
2115		- if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file) {
2116		- unlink($temp_file);
2117		- }
2118		-
2119		- return $embeddings;
2120		-
2121		- } catch (\Exception $e) {
2122		- // error_log(esc_html__("Error parsing or processing PDF: ", 'mxchat') . $e->getMessage());
2123		-
2124		- // Cleanup in case of exception
2125		- if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file && file_exists($temp_file)) {
2126		- unlink($temp_file);
2127		- }
2128		-
2129		- return false;
2130		- }
2131		-}
2132		-private function find_relevant_pdf_pages($query_embedding, $embeddings) {
2133		- //error_log(esc_html__("find_relevant_pdf_pages called.", 'mxchat'));
2134		-
2135		- $most_relevant = null;
2136		- $highest_similarity = -INF;
2137		-
2138		- foreach ($embeddings as $page_data) {
2139		- $similarity = $this->mxchat_calculate_cosine_similarity($query_embedding, $page_data['embedding']);
2140		-
2141		- if ($similarity > $highest_similarity) {
2142		- $highest_similarity = $similarity;
2143		- $most_relevant = $page_data['page_number'];
2144		- }
2145		- }
2146		-
2147		- if (!is_null($most_relevant)) {
2148		- $page_numbers = range(max(1, $most_relevant - 1), min(count($embeddings), $most_relevant + 1));
2149		- return array_filter($embeddings, function ($page) use ($page_numbers) {
2150		- return in_array($page['page_number'], $page_numbers);
2151		- });
2152		- }
2153		-
2154		- return [];
2155		-}
2156		-// Add this to your class
2157		-public function handle_pdf_upload() {
2158		- check_ajax_referer('mxchat_chat_nonce', 'nonce');
2159		-
2160		- if (!isset($_FILES['pdf_file']) || !isset($_POST['session_id'])) {
2161		- wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat'));
2162		- return;
2163		- }
2164		-
2165		- $file = $_FILES['pdf_file'];
2166		- $session_id = sanitize_text_field($_POST['session_id']);
2167		- $original_filename = sanitize_text_field($file['name']);
2168		-
2169		- $file_type = wp_check_filetype($file['name'], ['pdf' => 'application/pdf']);
2170		- if ($file_type['type'] !== 'application/pdf') {
2171		- wp_send_json_error(esc_html__('Invalid file type. Only PDF files are allowed.', 'mxchat'));
2172		- return;
2173		- }
2174		-
2175		- $upload_dir = wp_upload_dir();
2176		- $pdf_filename = 'mxchat_' . $session_id . '_' . time() . '.pdf';
2177		- $pdf_path = $upload_dir['path'] . '/' . $pdf_filename;
2178		-
2179		- if (!move_uploaded_file($file['tmp_name'], $pdf_path)) {
2180		- wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat'));
2181		- return;
2182		- }
2183		-
2184		- $this->clear_pdf_transients($session_id);
2185		-
2186		- $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
2187		- $embeddings = $this->fetch_and_split_pdf_pages($pdf_path, $max_pages);
2188		-
2189		- if ($embeddings === 'too_many_pages') {
2190		- unlink($pdf_path);
2191		- $error_message = sprintf(
2192		- $this->options['pdf_intent_error_text'] ??
2193		- esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
2194		- $max_pages
2195		- );
2196		- wp_send_json_error($error_message);
2197		- return;
2198		- }
2199		-
2200		- if ($embeddings === false || empty($embeddings)) {
2201		- unlink($pdf_path);
2202		- $error_message = $this->options['pdf_intent_error_text'] ??
2203		- esc_html__('The uploaded PDF appears to be empty or contains unsupported content.', 'mxchat');
2204		- wp_send_json_error($error_message);
2205		- return;
2206		- }
2207		-
2208		- if (!empty($embeddings)) {
2209		- set_transient('mxchat_pdf_url_' . $session_id, $pdf_path, HOUR_IN_SECONDS);
2210		- set_transient('mxchat_pdf_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS);
2211		- set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
2212		- set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
2213		-
2214		- $success_message = $this->options['pdf_intent_success_text'] ??
2215		- esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat');
2216		-
2217		- wp_send_json_success([
2218		- 'message' => $success_message,
2219		- 'filename' => $original_filename
2220		- ]);
2221		- return;
2222		- }
2223		-
2224		- unlink($pdf_path);
2225		- $error_message = $this->options['pdf_intent_error_text'] ??
2226		- esc_html__('Sorry, I couldn\'t process the PDF. Please ensure it\'s a valid file.', 'mxchat');
2227		- wp_send_json_error($error_message);
2228		- return;
2229		-}
2230		-public function handle_pdf_remove() {
2231		- check_ajax_referer('mxchat_chat_nonce', 'nonce');
2232		-
2233		- if (empty($_POST['session_id'])) {
2234		- wp_send_json_error(esc_html__('Session ID missing.', 'mxchat'));
2235		- wp_die();
2236		- }
2237		-
2238		- $session_id = sanitize_text_field($_POST['session_id']);
2239		- $pdf_path = get_transient('mxchat_pdf_url_' . $session_id);
2240		-
2241		- if ($pdf_path && file_exists($pdf_path)) {
2242		- unlink($pdf_path);
2243		- }
2244		-
2245		- $this->clear_pdf_transients($session_id);
2246		-
2247		- wp_send_json_success([
2248		- 'message' => esc_html__('PDF removed successfully.', 'mxchat')
2249		- ]);
2250		- wp_die();
2251		-}
2252		-
2253		-
2254		-/**
2255		- * Calls the AI API with the provided prompt.
2256		- *
2257		- * @param string $prompt The prompt to send to the AI.
2258		- * @return array An array containing the AI's response text.
2259		- */
2260		-private function mxchat_call_ai_api( $prompt ) {
2261		- //error_log( esc_html__( 'Calling AI API with the provided prompt.', 'mxchat' ) );
2262		-
2263		- $api_key = $this->options['api_key'];
2264		- if ( empty( $api_key ) ) {
2265		- //error_log( esc_html__( 'API key is not set.', 'mxchat' ) );
2266		- return [ 'text' => esc_html__( 'API key is not set.', 'mxchat' ) ];
2267		- }
2268		-
2269		- $url = 'https://api.openai.com/v1/chat/completions';
2270		- $messages = [
2271		- [
2272		- 'role' => 'system',
2273		- 'content' => __( 'You are a helpful assistant that provides concise and personalized product recommendations. Someone has asked you for some recommendations please respond very concisely appropriate for an AI chatbot.', 'mxchat' ),
2274		- ],
2275		- [
2276		- 'role' => 'user',
2277		- 'content' => $prompt,
2278		- ],
2279		- ];
2280		-
2281		- $args = [
2282		- 'headers' => [
2283		- 'Authorization' => 'Bearer ' . $api_key,
2284		- 'Content-Type' => 'application/json',
2285		- ],
2286		- 'body' => wp_json_encode(
2287		- [
2288		- 'model' => 'gpt-4o',
2289		- 'messages' => $messages,
2290		- 'temperature' => 0.7,
2291		- ]
2292		- ),
2293		- 'timeout' => 10,
2294		- 'method' => 'POST',
2295		- ];
2296		-
2297		- $response = wp_remote_post( $url, $args );
2298		-
2299		- if ( is_wp_error( $response ) ) {
2300		- //error_log( esc_html__( 'Error communicating with AI API: ', 'mxchat' ) . $response->get_error_message() );
2301		- return [ 'text' => esc_html__( 'Error communicating with AI API.', 'mxchat' ) ];
2302		- }
2303		-
2304		- $body = wp_remote_retrieve_body( $response );
2305		- //error_log( esc_html__( 'API response body: ', 'mxchat' ) . $body );
2306		-
2307		- $decoded_body = json_decode( $body, true );
2308		- if ( isset( $decoded_body['choices'][0]['message']['content'] ) ) {
2309		- return [ 'text' => $decoded_body['choices'][0]['message']['content'] ];
2310		- } else {
2311		- //error_log( esc_html__( 'Unexpected API response format: ', 'mxchat' ) . wp_json_encode( $decoded_body ) );
2312		- return [ 'text' => esc_html__( 'No response received from AI.', 'mxchat' ) ];
2313		- }
2314		-}
2315		-
2316		-/**
2317		- * Fetches the AI response for the given prompt.
2318		- *
2319		- * @param string $prompt The prompt to send to the AI.
2320		- * @return string|null The AI's response text or null if not available.
2321		- */
2322		-private function mxchat_fetch_ai_response( $prompt ) {
2323		- $response = $this->mxchat_call_ai_api( $prompt );
2324		- return isset( $response['text'] ) ? $response['text'] : null;
2325		-}
2326		-/**
2327		- * Generates the AI prompt for product recommendations.
2328		- *
2329		- * @param array $recommendations An array of product recommendations.
2330		- * @return string The generated AI prompt.
2331		- */
2332		-private function mxchat_generate_ai_recommendation_prompt($recommendations) {
2333		- $recommendation_list = '';
2334		- foreach ($recommendations as $index => $rec) {
2335		- $number = $index + 1;
2336		- $name = $rec['name'];
2337		- $price = $rec['price'];
2338		- $url = $rec['url'];
2339		- $image = $rec['image'];
2340		- $recommendation_list .= "{$number}. " . esc_html__('Product:', 'mxchat') . " {$name} (" . esc_html__('Price:', 'mxchat') . " \\${$price})\n";
2341		- $recommendation_list .= " [Link]({$url})\n";
2342		- $recommendation_list .= " \n\n";
2343		- }
2344		-
2345		- $prompt = esc_html__('Based on the following list of products, generate a unique, friendly, and personalized response to a user. ', 'mxchat');
2346		- $prompt .= esc_html__('If some products aren\'t exactly what the user asked for but share similar styles or patterns, acknowledge this and explain why you\'re suggesting them. ', 'mxchat');
2347		- $prompt .= esc_html__('For each product, provide a brief justification that clearly explains why it\'s relevant, especially if it\'s a different type of product than requested. ', 'mxchat');
2348		- $prompt .= esc_html__('Please number your responses to match the product numbers.', 'mxchat') . "\n\n";
2349		- $prompt .= esc_html__('Products:', 'mxchat') . "\n\n{$recommendation_list}";
2350		- $prompt .= esc_html__('Please ensure that the number of each product matches the order in which the products are listed.', 'mxchat');
2351		-
2352		- return $prompt;
2353		-}
2354		-private function mxchat_generate_recommendations($user_id, $message) {
2355		- // 1. Gather user context
2356		- $user_context = $this->mxchat_get_user_context($user_id);
2357		-
2358		- // Get cart item IDs for filtering
2359		- $cart_item_ids = [];
2360		- if (!empty($user_context['cart_items'])) {
2361		- $cart_item_ids = array_map(function($item) {
2362		- return $item['product_id'];
2363		- }, $user_context['cart_items']);
2364		- }
2365		-
2366		- // 2. Get AI recommendation based on context
2367		- $ai_suggestion = $this->mxchat_get_ai_shopping_suggestion($message, $user_context);
2368		- //error_log("AI Shopping Suggestion: " . $ai_suggestion);
2369		-
2370		- // 3. Generate embedding for the AI suggestion
2371		- $suggestion_embedding = $this->mxchat_generate_embedding($ai_suggestion, $this->options['api_key']);
2372		- if (!$suggestion_embedding) {
2373		- //error_log("Could not generate embedding for AI suggestion");
2374		- return ['recommendations' => [], 'sources' => []];
2375		- }
2376		-
2377		- // 4. Use existing relevant content function to find matches
2378		- $relevant_content = $this->mxchat_find_relevant_content($suggestion_embedding);
2379		-
2380		- // 5. Extract product URLs from the relevant content
2381		- preg_match_all('/https?:\/\/[^\s<>"\']+?\/product\/[^\s<>"\']+/', $relevant_content, $matches);
2382		-
2383		- $found_products = [];
2384		- if (!empty($matches[0])) {
2385		- foreach ($matches[0] as $url) {
2386		- // Clean the URL
2387		- $url = rtrim($url, '/."\']');
2388		-
2389		- // Get the product slug
2390		- $path = parse_url($url, PHP_URL_PATH);
2391		- $slug = basename(rtrim($path, '/'));
2392		-
2393		- // Find product by slug
2394		- $args = array(
2395		- 'post_type' => 'product',
2396		- 'post_status' => 'publish',
2397		- 'name' => $slug,
2398		- 'posts_per_page' => 1
2399		- );
2400		-
2401		- $products = get_posts($args);
2402		-
2403		- if (!empty($products)) {
2404		- $product_id = $products[0]->ID;
2405		-
2406		- // Skip if product is in cart
2407		- if (in_array($product_id, $cart_item_ids)) {
2408		- //error_log("Skipping product ID $product_id - already in cart");
2409		- continue;
2410		- }
2411		-
2412		- $product = wc_get_product($product_id);
2413		-
2414		- if ($product && $product->is_purchasable() && !in_array($product_id, array_map(function($p) {
2415		- return $p->get_id();
2416		- }, $found_products))) {
2417		- $found_products[] = $product;
2418		- }
2419		- }
2420		- }
2421		- }
2422		-
2423		- // If no products found by URLs, look for product names in the content
2424		- if (empty($found_products)) {
2425		- $products = wc_get_products([
2426		- 'status' => 'publish',
2427		- 'limit' => -1,
2428		- 'return' => 'objects'
2429		- ]);
2430		-
2431		- foreach ($products as $product) {
2432		- // Skip if product is in cart
2433		- if (in_array($product->get_id(), $cart_item_ids)) {
2434		- continue;
2435		- }
2436		-
2437		- $name = $product->get_name();
2438		- if (stripos($relevant_content, $name) !== false) {
2439		- if ($product->is_purchasable() && !in_array($product->get_id(), array_map(function($p) {
2440		- return $p->get_id();
2441		- }, $found_products))) {
2442		- $found_products[] = $product;
2443		- }
2444		- }
2445		- }
2446		- }
2447		-
2448		- // Keep searching until we have 4 products or run out of options
2449		- $formatted_recommendations = [];
2450		- foreach ($found_products as $product) {
2451		- if (count($formatted_recommendations) >= 4) break;
2452		-
2453		- $formatted_recommendations[] = [
2454		- 'name' => $product->get_name(),
2455		- 'price' => $product->get_price(),
2456		- 'url' => get_permalink($product->get_id()),
2457		- 'image' => wp_get_attachment_url($product->get_image_id())
2458		- ];
2459		- }
2460		-
2461		- return [
2462		- 'recommendations' => $formatted_recommendations,
2463		- 'sources' => [__('AI-powered personalized recommendations', 'mxchat')]
2464		- ];
2465		-}
2466		-private function mxchat_get_ai_shopping_suggestion($message, $user_context) {
2467		- $prompt = esc_html__("As a shopping assistant, analyze this user's context and generate a specific product search suggestion. ", 'mxchat');
2468		- $prompt .= esc_html__("User's Question: \"{$message}\"\n\n", 'mxchat');
2469		-
2470		- if (!empty($user_context['order_history'])) {
2471		- $prompt .= esc_html__("Their recent orders include:\n", 'mxchat');
2472		- foreach ($user_context['order_history'] as $order) {
2473		- $prompt .= esc_html__("- {$order['name']} ({$order['date']})\n", 'mxchat');
2474		- }
2475		- }
2476		-
2477		- if (!empty($user_context['cart_items'])) {
2478		- $prompt .= esc_html__("\nThey currently have in their cart:\n", 'mxchat');
2479		- foreach ($user_context['cart_items'] as $item) {
2480		- $prompt .= esc_html__("- {$item['name']}\n", 'mxchat');
2481		- }
2482		- }
2483		-
2484		- $prompt .= esc_html__("\nBased on their question and history, suggest a specific search query that would help find the most relevant products. ", 'mxchat');
2485		- $prompt .= esc_html__("Respond with ONLY the search query, nothing else.", 'mxchat');
2486		-
2487		- $response = $this->mxchat_call_ai_api($prompt);
2488		- return isset($response['text']) ? trim($response['text']) : $message;
2489		-}
2490		-public function mxchat_handle_product_recommendations($message, $user_id, $session_id) {
2491		- try {
2492		- //error_log("Starting product recommendations for user: $user_id, session: $session_id");
2493		-
2494		- // Pass the message to get context-aware recommendations
2495		- $recommendation_data = $this->mxchat_generate_recommendations($user_id, $message);
2496		- //error_log('Generated recommendation data: ' . wp_json_encode($recommendation_data));
2497		-
2498		- if (empty($recommendation_data['recommendations'])) {
2499		- //error_log("No recommendations found for user: $user_id");
2500		- $this->fallbackResponse = [
2501		- 'text' => __("I couldn't find any product recommendations for you right now. Please try again later!", 'mxchat'),
2502		- ];
2503		- return;
2504		- }
2505		-
2506		- // Remove duplicates and limit to top 4 recommendations
2507		- $unique_recommendations = [];
2508		- foreach ($recommendation_data['recommendations'] as $rec) {
2509		- $unique_recommendations[$rec['url']] = $rec;
2510		- }
2511		-
2512		- $unique_recommendations = array_slice($unique_recommendations, 0, 4);
2513		- //error_log('Top 4 recommendations: ' . wp_json_encode($unique_recommendations));
2514		-
2515		- $recommendations_summary = [];
2516		- foreach ($unique_recommendations as $rec) {
2517		- $recommendations_summary[] = [
2518		- 'name' => $rec['name'],
2519		- 'price' => strip_tags($rec['price']),
2520		- 'url' => $rec['url'],
2521		- 'image' => $rec['image'],
2522		- ];
2523		- }
2524		-
2525		- // Generate AI prompt and fetch response
2526		- $ai_prompt = $this->mxchat_generate_ai_recommendation_prompt($recommendations_summary);
2527		- $ai_response = $this->mxchat_fetch_ai_response($ai_prompt);
2528		-
2529		- if (empty($ai_response)) {
2530		- $this->fallbackResponse = [
2531		- 'text' => __('An unexpected error occurred while generating recommendations. Please try again later.', 'mxchat'),
2532		- ];
2533		- return;
2534		- }
2535		-
2536		- // Split the AI's response into lines
2537		- $ai_lines = preg_split('/\r\n|\r|\n/', $ai_response);
2538		-
2539		- // Initialize variables
2540		- $formatted_response = '';
2541		- $justifications = [];
2542		- $current_number = 0;
2543		- $in_introduction = true;
2544		- $introduction = '';
2545		-
2546		- // Parse the AI response to separate the introduction and the justifications
2547		- foreach ($ai_lines as $line) {
2548		- if (preg_match('/^\s*(\d+)\.\s*(.*)$/', $line, $matches)) {
2549		- // This line is a numbered justification
2550		- $current_number = intval($matches[1]) - 1;
2551		- $justifications[$current_number] = $matches[2];
2552		- $in_introduction = false;
2553		- } elseif ($in_introduction) {
2554		- // This line is part of the introduction
2555		- $introduction .= $line . ' ';
2556		- } else {
2557		- // This line is a continuation of the current justification
2558		- if (isset($justifications[$current_number])) {
2559		- $justifications[$current_number] .= ' ' . $line;
2560		- }
2561		- }
2562		- }
2563		-
2564		- // Build the formatted response
2565		- if (!empty($introduction)) {
2566		- $formatted_response .= esc_html(trim($introduction)) . "<br><br>";
2567		- }
2568		-
2569		- foreach ($recommendations_summary as $index => $rec) {
2570		- $name = esc_html($rec['name']);
2571		- $price = number_format((float)$rec['price'], 2, '.', '');
2572		- $url = esc_url($rec['url']);
2573		- $image = esc_url($rec['image']);
2574		-
2575		- $formatted_response .= ($index + 1) . ". <strong>" . $name . "</strong> - <strong>$" . $price . "</strong><br>";
2576		- $formatted_response .= "<img src=\"{$image}\" alt=\"{$name}\" style=\"max-width: 200px; height: auto; display: block; margin: 10px 0;\" /><br>";
2577		-
2578		- if (isset($justifications[$index])) {
2579		- $formatted_response .= "<em>" . esc_html(trim($justifications[$index])) . "</em><br><br>";
2580		- }
2581		- }
2582		-
2583		- $this->fallbackResponse = [
2584		- 'text' => $formatted_response,
2585		- ];
2586		- //error_log('Final formatted response set.');
2587		- } catch (Exception $e) {
2588		- //error_log('Error in mxchat_handle_product_recommendations: ' . $e->getMessage());
2589		- $this->fallbackResponse = [
2590		- 'text' => __('An unexpected error occurred while generating recommendations. Please try again later.', 'mxchat'),
2591		- ];
2592		- }
2593		-}
2594		-private function mxchat_get_user_context($user_id) {
2595		- $context = [
2596		- 'order_history' => [],
2597		- 'cart_items' => [],
2598		- 'recently_viewed' => [],
2599		- ];
2600		-
2601		- // Get order history
2602		- if (is_user_logged_in() && $user_id) {
2603		- $orders = wc_get_orders([
2604		- 'customer_id' => $user_id,
2605		- 'limit' => 5, // Last 5 orders
2606		- 'orderby' => 'date',
2607		- 'order' => 'DESC',
2608		- ]);
2609		-
2610		- foreach ($orders as $order) {
2611		- foreach ($order->get_items() as $item) {
2612		- $context['order_history'][] = [
2613		- 'name' => $item->get_name(),
2614		- 'product_id' => $item->get_product_id(),
2615		- 'date' => $order->get_date_created()->format('Y-m-d')
2616		- ];
2617		- }
2618		- }
2619		- }
2620		-
2621		- // Get cart items
2622		- if (WC()->cart && WC()->cart->get_cart_contents_count() > 0) {
2623		- foreach (WC()->cart->get_cart() as $cart_item) {
2624		- $product = wc_get_product($cart_item['product_id']);
2625		- if ($product) {
2626		- $context['cart_items'][] = [
2627		- 'name' => $product->get_name(),
2628		- 'product_id' => $product->get_id()
2629		- ];
2630		- }
2631		- }
2632		- }
2633		-
2634		- // Get recently viewed items from session
2635		- $viewed_products = WC()->session->get('recently_viewed_products', []);
2636		- foreach ($viewed_products as $product_id) {
2637		- $product = wc_get_product($product_id);
2638		- if ($product) {
2639		- $context['recently_viewed'][] = [
2640		- 'name' => $product->get_name(),
2641		- 'product_id' => $product->get_id()
2642		- ];
2643		- }
2644		- }
2645		-
2646		- return $context;
2647		-}
2648		-
2649		-
2650		-
2651		-
2652		-
2653		-
2654		-function mxchat_fetch_new_messages() {
2655		- $session_id = sanitize_text_field($_POST['session_id']);
2656		- $last_seen_id = sanitize_text_field($_POST['last_seen_id']);
2657		- $persistence_enabled = $_POST['persistence_enabled'] === 'true';
2658		- $initial_timestamp = isset($_POST['initial_timestamp']) ? intval($_POST['initial_timestamp']) : 0;
2659		-
2660		- if (empty($session_id)) {
2661		- //error_log(esc_html__('Fetch new messages error: Session ID missing.', 'mxchat'));
2662		- wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
2663		- wp_die();
2664		- }
2665		-
2666		- $history = get_option("mxchat_history_{$session_id}", []);
2667		-
2668		- $new_messages = array_filter($history, function ($message) use ($last_seen_id, $persistence_enabled, $initial_timestamp) {
2669		- // If persistence is enabled, show all new messages
2670		- if ($persistence_enabled) {
2671		- return !empty($message['id']) &&
2672		- strcmp($message['id'], $last_seen_id) > 0 &&
2673		- $message['role'] === 'agent';
2674		- }
2675		-
2676		- // If persistence is disabled, only show messages after initial timestamp
2677		- return !empty($message['id']) &&
2678		- $message['role'] === 'agent' &&
2679		- $message['timestamp'] > $initial_timestamp;
2680		- });
2681		-
2682		- //error_log(esc_html__("New agent messages fetched for session $session_id. Last seen ID: $last_seen_id", 'mxchat'));
2683		-
2684		- wp_send_json_success([
2685		- 'new_messages' => array_values($new_messages)
2686		- ]);
2687		- wp_die();
2688		-}
2689		-
2690		-
2691		-public function mxchat_live_agent_handover($message, $user_id, $session_id) {
2692		- // First check if live agents are available
2693		- $live_agent_available = $this->options['live_agent_status'] ?? 'off';
2694		- if ($live_agent_available !== 'on') {
2695		- $away_message = $this->options['live_agent_away_message'] ?? 'Sorry, live agents are currently unavailable. I can continue helping you as an AI assistant.';
2696		- $this->fallbackResponse = [
2697		- 'text' => $away_message,
2698		- 'html' => '',
2699		- 'images' => [],
2700		- 'chat_mode' => 'ai'
2701		- ];
2702		- wp_send_json([
2703		- 'text' => $away_message,
2704		- 'html' => '',
2705		- 'chat_mode' => 'ai',
2706		- 'session_id' => $session_id
2707		- ]);
2708		- wp_die();
2709		- }
2710		-
2711		- $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
2712		- if (empty($slack_webhook_url)) {
2713		- return false;
2714		- }
2715		-
2716		- // Get recent chat history (last 5 messages)
2717		- $history = get_option("mxchat_history_{$session_id}", []);
2718		- $recent_history = array_slice($history, -5); // Get last 5 messages
2719		-
2720		- // Format conversation history
2721		- $conversation_context = "";
2722		- if (!empty($recent_history)) {
2723		- $conversation_context = "*Recent Conversation:*\n";
2724		- foreach ($recent_history as $hist_message) {
2725		- $role_display = $hist_message['role'] === 'user' ? 'User' : 'AI';
2726		- $conversation_context .= ">{$role_display}: {$hist_message['content']}\n";
2727		- }
2728		- $conversation_context .= "\n";
2729		- }
2730		-
2731		- update_option("mxchat_mode_{$session_id}", 'agent');
2732		-
2733		- $webhook_data = [
2734		- 'blocks' => [
2735		- [
2736		- 'type' => 'header',
2737		- 'text' => [
2738		- 'type' => 'plain_text',
2739		- 'text' => '🔔 New Live Agent Request',
2740		- 'emoji' => true
2741		- ]
2742		- ],
2743		- [
2744		- 'type' => 'section',
2745		- 'fields' => [
2746		- [
2747		- 'type' => 'mrkdwn',
2748		- 'text' => sprintf('*User ID:*\n`%s`', $user_id)
2749		- ],
2750		- [
2751		- 'type' => 'mrkdwn',
2752		- 'text' => sprintf('*Session ID:*\n`%s`', $session_id)
2753		- ]
2754		- ]
2755		- ]
2756		- ]
2757		- ];
2758		-
2759		- // Add conversation history if exists
2760		- if (!empty($conversation_context)) {
2761		- $webhook_data['blocks'][] = [
2762		- 'type' => 'section',
2763		- 'text' => [
2764		- 'type' => 'mrkdwn',
2765		- 'text' => $conversation_context
2766		- ]
2767		- ];
2768		- }
2769		-
2770		- // Add the current message
2771		- $webhook_data['blocks'][] = [
2772		- 'type' => 'section',
2773		- 'text' => [
2774		- 'type' => 'mrkdwn',
2775		- 'text' => sprintf('*Current Message:*\n%s', $message)
2776		- ]
2777		- ];
2778		-
2779		- // Add the reply button
2780		- $webhook_data['blocks'][] = [
2781		- 'type' => 'actions',
2782		- 'elements' => [
2783		- [
2784		- 'type' => 'button',
2785		- 'text' => [
2786		- 'type' => 'plain_text',
2787		- 'text' => '✍️ Reply',
2788		- 'emoji' => true
2789		- ],
2790		- 'value' => $session_id,
2791		- 'action_id' => 'reply_to_user',
2792		- 'style' => 'primary'
2793		- ]
2794		- ]
2795		- ];
2796		-
2797		- $response = wp_remote_post($slack_webhook_url, [
2798		- 'body' => json_encode($webhook_data),
2799		- 'headers' => [
2800		- 'Content-Type' => 'application/json',
2801		- ],
2802		- ]);
2803		-
2804		- if (is_wp_error($response)) {
2805		- return false;
2806		- }
2807		-
2808		- $success_message = $this->options['live_agent_notification_message'] ?? 'Live agent has been notified.';
2809		- $this->mxchat_save_chat_message($session_id, 'bot', $success_message);
2810		-
2811		- $this->fallbackResponse = [
2812		- 'text' => $success_message,
2813		- 'html' => '',
2814		- 'images' => [],
2815		- 'chat_mode' => 'agent'
2816		- ];
2817		-
2818		- wp_send_json([
2819		- 'success' => true,
2820		- 'text' => $success_message,
2821		- 'html' => '',
2822		- 'chat_mode' => 'agent',
2823		- 'session_id' => $session_id,
2824		- 'fallbackResponse' => $this->fallbackResponse
2825		- ]);
2826		- wp_die();
2827		-}
2828		-public function mxchat_send_user_message_to_agent($message, $user_id, $session_id) {
2829		- $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
2830		-
2831		- if (empty($slack_webhook_url)) {
2832		- //error_log(esc_html__('Slack Webhook URL is not configured.', 'mxchat'));
2833		- return false;
2834		- }
2835		-
2836		- $webhook_data = [
2837		- 'blocks' => [
2838		- [
2839		- 'type' => 'header',
2840		- 'text' => [
2841		- 'type' => 'plain_text',
2842		- 'text' => esc_html__('📩 New Chat Message', 'mxchat'),
2843		- 'emoji' => true
2844		- ]
2845		- ],
2846		- [
2847		- 'type' => 'section',
2848		- 'fields' => [
2849		- [
2850		- 'type' => 'mrkdwn',
2851		- 'text' => sprintf(esc_html__('*User ID:*\n`%s`', 'mxchat'), $user_id)
2852		- ],
2853		- [
2854		- 'type' => 'mrkdwn',
2855		- 'text' => sprintf(esc_html__('*Session ID:*\n`%s`', 'mxchat'), $session_id)
2856		- ]
2857		- ]
2858		- ],
2859		- [
2860		- 'type' => 'section',
2861		- 'text' => [
2862		- 'type' => 'mrkdwn',
2863		- 'text' => sprintf(esc_html__('*Message:*\n%s', 'mxchat'), $message)
2864		- ]
2865		- ],
2866		- [
2867		- 'type' => 'actions',
2868		- 'elements' => [
2869		- [
2870		- 'type' => 'button',
2871		- 'text' => [
2872		- 'type' => 'plain_text',
2873		- 'text' => esc_html__('✍️ Reply', 'mxchat'),
2874		- 'emoji' => true
2875		- ],
2876		- 'value' => $session_id,
2877		- 'action_id' => 'reply_to_user',
2878		- 'style' => 'primary'
2879		- ]
2880		- ]
2881		- ]
2882		- ]
2883		- ];
2884		-
2885		- $response = wp_remote_post($slack_webhook_url, [
2886		- 'body' => json_encode($webhook_data),
2887		- 'headers' => [
2888		- 'Content-Type' => 'application/json',
2889		- ],
2890		- ]);
2891		-
2892		- if (is_wp_error($response)) {
2893		- //error_log(esc_html__('Error sending message to Slack: ', 'mxchat') . $response->get_error_message());
2894		- return false;
2895		- }
2896		-
2897		- //error_log(esc_html__('Message sent to Slack successfully.', 'mxchat'));
2898		- return true;
2899		-}
2900		-public function handle_slack_interaction(WP_REST_Request $request) {
2901		- //error_log('Received Slack interaction');
2902		-
2903		- $payload = json_decode($request->get_param('payload'), true);
2904		- //error_log('Payload: ' . print_r($payload, true));
2905		-
2906		- // Handle button click
2907		- if ($payload['type'] === 'block_actions' && $payload['actions'][0]['action_id'] === 'reply_to_user') {
2908		- $session_id = $payload['actions'][0]['value'];
2909		- $trigger_id = $payload['trigger_id'];
2910		-
2911		- // Get Bot Token from settings
2912		- $slack_token = $this->options['live_agent_bot_token'] ?? '';
2913		-
2914		- if (empty($slack_token)) {
2915		- //error_log('Slack Bot Token not configured');
2916		- return new WP_REST_Response(['error' => esc_html__('Bot token not configured', 'mxchat')], 400);
2917		- }
2918		- $response = wp_remote_post('https://slack.com/api/views.open', [
2919		- 'headers' => [
2920		- 'Content-Type' => 'application/json',
2921		- 'Authorization' => 'Bearer ' . $slack_token
2922		- ],
2923		- 'body' => json_encode([
2924		- 'trigger_id' => $trigger_id,
2925		- 'view' => [
2926		- 'type' => 'modal',
2927		- 'callback_id' => 'reply_modal',
2928		- 'title' => [
2929		- 'type' => 'plain_text',
2930		- 'text' => __('Reply to User', 'mxchat')
2931		- ],
2932		- 'submit' => [
2933		- 'type' => 'plain_text',
2934		- 'text' => __('Send', 'mxchat')
2935		- ],
2936		- 'close' => [
2937		- 'type' => 'plain_text',
2938		- 'text' => __('Cancel', 'mxchat')
2939		- ],
2940		- 'blocks' => [
2941		- [
2942		- 'type' => 'input',
2943		- 'block_id' => 'reply_block',
2944		- 'label' => [
2945		- 'type' => 'plain_text',
2946		- 'text' => sprintf(__('Reply to session: %s', 'mxchat'), $session_id)
2947		- ],
2948		- 'element' => [
2949		- 'type' => 'plain_text_input',
2950		- 'action_id' => 'message',
2951		- 'multiline' => true,
2952		- 'placeholder' => [
2953		- 'type' => 'plain_text',
2954		- 'text' => __('Type your message here...', 'mxchat')
2955		- ]
2956		- ]
2957		- ]
2958		- ],
2959		- 'private_metadata' => $session_id
2960		- ]
2961		- ])
2962		- ]);
2963		-
2964		- //error_log('Views.open response: ' . print_r($response, true));
2965		-
2966		- // Return immediate acknowledgment
2967		- return new WP_REST_Response(['ok' => true]);
2968		- }
2969		-
2970		- // Handle modal submission
2971		-// Handle modal submission
2972		-if ($payload['type'] === 'view_submission') {
2973		- $session_id = $payload['view']['private_metadata'];
2974		- $message = $payload['view']['state']['values']['reply_block']['message']['value'];
2975		-
2976		- // Save the message (keep the message_id but don't include in response)
2977		- $this->mxchat_save_chat_message($session_id, 'agent', $message);
2978		-
2979		- // Keep the original response format for Slack
2980		- return new WP_REST_Response([
2981		- 'response_action' => 'clear'
2982		- ]);
2983		-}
2984		-
2985		- // Default acknowledgment
2986		- return new WP_REST_Response(['ok' => true]);
2987		-}
2988		-
2989		-public function mxchat_handle_agent_response(WP_REST_Request $request) {
2990		- //error_log('Received agent response request');
2991		- //error_log('Request data: ' . print_r($request->get_params(), true));
2992		- // error_log('Raw body: ' . file_get_contents('php://input'));
2993		-
2994		- // Get the data from Slack's slash command format
2995		- $command_text = $request->get_param('text');
2996		- // error_log('Command text: ' . $command_text);
2997		-
2998		- if (empty($command_text)) {
2999		- //error_log(esc_html__('Agent response error: No command text received', 'mxchat'));
3000		- return new WP_REST_Response([
3001		- 'error' => esc_html__('Command text is required. Format: /reply session_id message', 'mxchat')
3002		- ], 400);
3003		- }
3004		-
3005		- // Split the command text into session_id and message
3006		- $parts = explode(' ', $command_text, 2);
3007		- if (count($parts) !== 2) {
3008		- //error_log('Agent response error: Invalid command format');
3009		- return new WP_REST_Response([
3010		- 'error' => esc_html__('Invalid format. Use: /reply session_id message', 'mxchat')
3011		- ], 400);
3012		- }
3013		-
3014		- $session_id = sanitize_text_field($parts[0]);
3015		- $message = sanitize_text_field($parts[1]);
3016		-
3017		- //error_log("Processing agent response - Session ID: $session_id, Message: $message");
3018		-
3019		- // Save the message
3020		- $message_id = $this->mxchat_save_chat_message($session_id, 'agent', $message);
3021		-
3022		- if (!$message_id) {
3023		- // error_log('Failed to save agent message');
3024		- return new WP_REST_Response([
3025		- 'error' => esc_html__('Failed to save message', 'mxchat')
3026		- ], 500);
3027		- }
3028		-
3029		- // Return success response in Slack's expected format
3030		- return new WP_REST_Response([
3031		- 'response_type' => 'in_channel',
3032		- 'text' => esc_html__("Message sent successfully to session $session_id", 'mxchat')
3033		- ], 200);
3034		-}
3035		-
3036		-
3037		-public function mxchat_handle_switch_to_chatbot_intent($message, $user_id, $session_id) {
3038		- //error_log(esc_html__("Switching back to chatbot mode via intent.", 'mxchat'));
3039		-
3040		- // Just update mode to AI
3041		- update_option("mxchat_mode_{$session_id}", 'ai');
3042		-
3043		- // Initialize states
3044		- $this->fallbackResponse = ['text' => '', 'html' => '', 'images' => []];
3045		- $this->productCardHtml = '';
3046		-
3047		- // Set the response message
3048		- $this->fallbackResponse['text'] = esc_html__('You are now chatting with the AI chatbot.', 'mxchat');
3049		-
3050		- return true; // Intent was handled
3051		-}
3052		-
3053		-
3054		-
3055		-
3056		-// For the word upload handler
3057		-public function mxchat_handle_word_upload() {
3058		- // Delegate to word handler
3059		- $this->word_handler->mxchat_handle_word_upload();
3060		-}
3061		-
3062		-// For the word removal handler
3063		-public function mxchat_handle_word_remove() {
3064		- // Delegate to word handler
3065		- $this->word_handler->mxchat_handle_word_remove();
3066		-}
3067		-
3068		-// For the word status check
3069		-public function mxchat_check_word_status() {
3070		- // Delegate to word handler
3071		- $this->word_handler->mxchat_check_word_status();
3072		-}
3073		-
3074		-
3075		-private function mxchat_get_user_identifier() {
3076		- return MxChat_User::mxchat_get_user_identifier();
3077		-}
3078		-
3079		-private function mxchat_generate_embedding($text, $api_key) {
3080		- $endpoint = 'https://api.openai.com/v1/embeddings';
3081		-
3082		- $body = wp_json_encode([
3083		- 'input' => $text,
3084		- 'model' => 'text-embedding-ada-002'
3085		- ]);
3086		-
3087		- $args = [
3088		- 'body' => $body,
3089		- 'headers' => [
3090		- 'Content-Type' => 'application/json',
3091		- 'Authorization' => 'Bearer ' . $api_key,
3092		- ],
3093		- 'timeout' => 60,
3094		- 'redirection' => 5,
3095		- 'blocking' => true,
3096		- 'httpversion' => '1.0',
3097		- 'sslverify' => true,
3098		- ];
3099		-
3100		- $response = wp_remote_post($endpoint, $args);
3101		-
3102		- if (is_wp_error($response)) {
3103		- return null;
3104		- }
3105		-
3106		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
3107		-
3108		- if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) {
3109		- return $response_body['data'][0]['embedding'];
3110		- } else {
3111		- return null;
3112		- }
3113		- }
3114		-
3115		-
3116		-private function mxchat_find_relevant_content($user_embedding) {
3117		- //error_log('MXChat Vector Search: Starting content search...');
3118		-
3119		- // Retrieve the add-on settings from the database.
3120		- $addon_options = get_option('mxchat_pinecone_addon_options', array());
3121		-
3122		- // Determine whether Pinecone is enabled.
3123		- // We expect the sanitized setting to be a string '1' if enabled, otherwise '0'.
3124		- $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
3125		-
3126		- //error_log('Pinecone enabled flag: ' . $use_pinecone);
3127		-
3128		- if ($use_pinecone === 1) {
3129		- //error_log('MXChat Vector Search: Using Pinecone database');
3130		- return $this->find_relevant_content_pinecone($user_embedding);
3131		- } else {
3132		- //error_log('MXChat Vector Search: Using WordPress database');
3133		- return $this->find_relevant_content_wordpress($user_embedding);
3134		- }
3135		-}
3136		-
3137		-private function find_relevant_content_wordpress($user_embedding) {
3138		- global $wpdb;
3139		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
3140		- $cache_key = 'mxchat_system_prompt_embeddings';
3141		- $batch_size = 500;
3142		-
3143		- // Retrieve embeddings from cache or database
3144		- $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
3145		- if ($embeddings === false) {
3146		- $embeddings = [];
3147		- $offset = 0;
3148		-
3149		- // Load in batches and build cache
3150		- do {
3151		- $query = $wpdb->prepare(
3152		- "SELECT id, embedding_vector
3153		- FROM {$system_prompt_table}
3154		- LIMIT %d OFFSET %d",
3155		- $batch_size,
3156		- $offset
3157		- );
3158		-
3159		- $batch = $wpdb->get_results($query);
3160		- if (empty($batch)) {
3161		- break;
3162		- }
3163		-
3164		- $embeddings = array_merge($embeddings, $batch);
3165		- $offset += $batch_size;
3166		-
3167		- // Free memory
3168		- unset($batch);
3169		-
3170		- } while (true);
3171		-
3172		- if (empty($embeddings)) {
3173		- return ''; // Return an empty string if no embeddings found
3174		- }
3175		- wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
3176		- }
3177		-
3178		- // Initialize array to store relevant results with similarity scores
3179		- $relevant_results = [];
3180		- // Iterate through embeddings to calculate similarity
3181		- foreach ($embeddings as $embedding) {
3182		- $database_embedding = $embedding->embedding_vector
3183		- ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
3184		- : null;
3185		- if (is_array($database_embedding) && is_array($user_embedding)) {
3186		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
3187		- $relevant_results[] = [
3188		- 'id' => $embedding->id,
3189		- 'similarity' => $similarity
3190		- ];
3191		- }
3192		- // Free memory
3193		- unset($database_embedding);
3194		- }
3195		-
3196		- // Retrieve the similarity threshold
3197		- $similarity_threshold = ((int) get_option('mxchat_similarity_threshold', 80)) / 100;
3198		-
3199		- // Filter and sort relevant results by similarity
3200		- $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
3201		- return $result['similarity'] >= $similarity_threshold;
3202		- });
3203		- usort($relevant_results, function ($a, $b) {
3204		- return $b['similarity'] <=> $a['similarity'];
3205		- });
3206		-
3207		- // Limit to the top 5 results
3208		- $top_results = array_slice($relevant_results, 0, 5);
3209		-
3210		- // Initialize the final content
3211		- $content = '';
3212		-
3213		- // Fetch and combine content for the top results
3214		- foreach ($top_results as $result) {
3215		- $chunk_content = $this->fetch_content_with_product_links($result['id']);
3216		- // Check if the content is PDF-related and add surrounding pages
3217		- if (strpos($chunk_content, '{"document_type":"pdf"') !== false) {
3218		- $surrounding_content = $wpdb->get_results($wpdb->prepare(
3219		- "SELECT article_content FROM {$system_prompt_table}
3220		- WHERE id IN (
3221		- (SELECT id FROM {$system_prompt_table} WHERE id < %d ORDER BY id DESC LIMIT 1),
3222		- (SELECT id FROM {$system_prompt_table} WHERE id > %d ORDER BY id ASC LIMIT 1)
3223		- )",
3224		- $result['id'],
3225		- $result['id']
3226		- ));
3227		- // Add previous content if it exists
3228		- if (!empty($surrounding_content[0])) {
3229		- $content .= $surrounding_content[0]->article_content . "\n\n";
3230		- }
3231		- // Add the main chunk content
3232		- $content .= $chunk_content . "\n\n";
3233		- // Add next content if it exists
3234		- if (!empty($surrounding_content[1])) {
3235		- $content .= $surrounding_content[1]->article_content . "\n\n";
3236		- }
3237		- } else {
3238		- // For non-PDF content, add directly
3239		- $content .= $chunk_content . "\n\n";
3240		- }
3241		- }
3242		-
3243		- return trim($content);
3244		-}
3245		-/**
3246		- * Find relevant content in Pinecone vector database
3247		- */
3248		-private function find_relevant_content_pinecone($user_embedding) {
3249		- $options = get_option('mxchat_pinecone_addon_options', array());
3250		- $api_key = $options['mxchat_pinecone_api_key'] ?? '';
3251		- $host = $options['mxchat_pinecone_host'] ?? '';
3252		-
3253		- if (empty($host) || empty($api_key)) {
3254		- //error_log('Pinecone credentials not properly configured');
3255		- return '';
3256		- }
3257		-
3258		- // Get similarity threshold from WordPress settings
3259		- $similarity_threshold = ((int) get_option('mxchat_similarity_threshold', 80)) / 100;
3260		-
3261		- // Prepare the query request for Pinecone
3262		- $api_endpoint = "https://{$host}/query";
3263		-
3264		- $request_body = array(
3265		- 'vector' => $user_embedding,
3266		- 'topK' => 5,
3267		- 'includeMetadata' => true,
3268		- 'includeValues' => true
3269		- );
3270		-
3271		- $response = wp_remote_post($api_endpoint, array(
3272		- 'headers' => array(
3273		- 'Api-Key' => $api_key,
3274		- 'accept' => 'application/json',
3275		- 'content-type' => 'application/json'
3276		- ),
3277		- 'body' => wp_json_encode($request_body),
3278		- 'timeout' => 30
3279		- ));
3280		-
3281		- if (is_wp_error($response)) {
3282		- //error_log('Pinecone query error: ' . $response->get_error_message());
3283		- return '';
3284		- }
3285		-
3286		- $response_code = wp_remote_retrieve_response_code($response);
3287		- if ($response_code !== 200) {
3288		- //error_log('Pinecone API error: ' . wp_remote_retrieve_body($response));
3289		- return '';
3290		- }
3291		-
3292		- $results = json_decode(wp_remote_retrieve_body($response), true);
3293		- if (empty($results['matches'])) {
3294		- return '';
3295		- }
3296		-
3297		- // Initialize the final content
3298		- $content = '';
3299		-
3300		- // Process each match
3301		- foreach ($results['matches'] as $match) {
3302		- // Skip if similarity is below threshold
3303		- if ($match['score'] < $similarity_threshold) {
3304		- continue;
3305		- }
3306		-
3307		- if (!empty($match['metadata']['text']) && !empty($match['metadata']['source_url'])) {
3308		- // Add content with citation
3309		- $content .= $match['metadata']['text'] . "\n";
3310		- $content .= "Source: " . $match['metadata']['source_url'] . "\n\n";
3311		- }
3312		- }
3313		-
3314		- return trim($content);
3315		-}
3316		-
3317		-
3318		-private function mxchat_find_relevant_products($user_embedding) {
3319		- //error_log('MXChat Vector Search: Starting product search...');
3320		-
3321		- // Retrieve the add-on settings from the database
3322		- $addon_options = get_option('mxchat_pinecone_addon_options', array());
3323		-
3324		- // Determine whether Pinecone is enabled
3325		- $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
3326		-
3327		- //error_log('Pinecone enabled flag: ' . $use_pinecone);
3328		-
3329		- if ($use_pinecone === 1) {
3330		- //error_log('MXChat Vector Search: Using Pinecone database for products');
3331		- return $this->find_relevant_products_pinecone($user_embedding);
3332		- } else {
3333		- //error_log('MXChat Vector Search: Using WordPress database for products');
3334		- return $this->find_relevant_products_wordpress($user_embedding);
3335		- }
3336		-}
3337		-
3338		-private function find_relevant_products_wordpress($user_embedding) {
3339		- global $wpdb;
3340		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
3341		- $cache_key = 'mxchat_system_prompt_embeddings';
3342		- $batch_size = 500;
3343		-
3344		- // Original WordPress database search logic
3345		- // [Previous implementation remains the same]
3346		- $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
3347		- if ($embeddings === false) {
3348		- $embeddings = [];
3349		- $offset = 0;
3350		-
3351		- do {
3352		- $query = $wpdb->prepare(
3353		- "SELECT id, embedding_vector
3354		- FROM {$system_prompt_table}
3355		- LIMIT %d OFFSET %d",
3356		- $batch_size,
3357		- $offset
3358		- );
3359		-
3360		- $batch = $wpdb->get_results($query);
3361		- if (empty($batch)) {
3362		- break;
3363		- }
3364		-
3365		- $embeddings = array_merge($embeddings, $batch);
3366		- $offset += $batch_size;
3367		-
3368		- unset($batch);
3369		-
3370		- } while (true);
3371		-
3372		- if (empty($embeddings)) {
3373		- return '';
3374		- }
3375		- wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
3376		- }
3377		-
3378		- $relevant_results = [];
3379		- foreach ($embeddings as $embedding) {
3380		- $database_embedding = $embedding->embedding_vector
3381		- ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
3382		- : null;
3383		- if (is_array($database_embedding) && is_array($user_embedding)) {
3384		- $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
3385		- $relevant_results[] = [
3386		- 'id' => $embedding->id,
3387		- 'similarity' => $similarity
3388		- ];
3389		- }
3390		- unset($database_embedding);
3391		- }
3392		-
3393		- // Use fixed threshold for products
3394		- $similarity_threshold = 0.85;
3395		-
3396		- $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
3397		- return $result['similarity'] >= $similarity_threshold;
3398		- });
3399		- usort($relevant_results, function ($a, $b) {
3400		- return $b['similarity'] <=> $a['similarity'];
3401		- });
3402		-
3403		- $top_results = array_slice($relevant_results, 0, 5);
3404		- $content = '';
3405		-
3406		- foreach ($top_results as $result) {
3407		- $chunk_content = $this->fetch_content_with_product_links($result['id']);
3408		- $content .= $chunk_content . "\n\n";
3409		- }
3410		-
3411		- return trim($content);
3412		-}
3413		-
3414		-// Modified search function with correct filter syntax
3415		-private function find_relevant_products_pinecone($user_embedding) {
3416		- //error_log('Starting Pinecone product search...');
3417		-
3418		- $options = get_option('mxchat_pinecone_addon_options', array());
3419		- $api_key = $options['mxchat_pinecone_api_key'] ?? '';
3420		- $host = $options['mxchat_pinecone_host'] ?? '';
3421		-
3422		- if (empty($host) || empty($api_key)) {
3423		- //error_log('Pinecone credentials not properly configured for product search');
3424		- return '';
3425		- }
3426		-
3427		- $similarity_threshold = 0.85;
3428		- $api_endpoint = "https://{$host}/query";
3429		-
3430		- $request_body = array(
3431		- 'vector' => $user_embedding,
3432		- 'topK' => 5,
3433		- 'includeMetadata' => true,
3434		- 'includeValues' => true,
3435		- 'filter' => array(
3436		- 'type' => 'product'
3437		- )
3438		- );
3439		-
3440		- //error_log('Sending request to Pinecone with body: ' . wp_json_encode($request_body));
3441		-
3442		- $response = wp_remote_post($api_endpoint, array(
3443		- 'headers' => array(
3444		- 'Api-Key' => $api_key,
3445		- 'accept' => 'application/json',
3446		- 'content-type' => 'application/json'
3447		- ),
3448		- 'body' => wp_json_encode($request_body),
3449		- 'timeout' => 30
3450		- ));
3451		-
3452		- if (is_wp_error($response)) {
3453		- //error_log('Pinecone product query error: ' . $response->get_error_message());
3454		- return '';
3455		- }
3456		-
3457		- $response_code = wp_remote_retrieve_response_code($response);
3458		- //error_log('Pinecone response code: ' . $response_code);
3459		-
3460		- if ($response_code !== 200) {
3461		- //error_log('Pinecone API error during product search: ' . wp_remote_retrieve_body($response));
3462		- return '';
3463		- }
3464		-
3465		- $results = json_decode(wp_remote_retrieve_body($response), true);
3466		- //error_log('Pinecone raw response: ' . wp_remote_retrieve_body($response));
3467		-
3468		- if (empty($results['matches'])) {
3469		- //error_log('No matches found in Pinecone response');
3470		- return '';
3471		- }
3472		-
3473		- $content = '';
3474		- foreach ($results['matches'] as $match) {
3475		- if ($match['score'] < $similarity_threshold) {
3476		- //error_log("Match below threshold: " . $match['score']);
3477		- continue;
3478		- }
3479		-
3480		- if (!empty($match['metadata']['text'])) {
3481		- $content .= $match['metadata']['text'];
3482		- if (!empty($match['metadata']['source_url'])) {
3483		- $content .= "\n\nFor more details, check out this product: " . esc_url($match['metadata']['source_url']);
3484		- }
3485		- $content .= "\n\n";
3486		- }
3487		- }
3488		-
3489		- return trim($content);
3490		-}
3491		-
3492		-
3493		-private function fetch_content_with_product_links($most_relevant_id) {
3494		- global $wpdb;
3495		- $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
3496		-
3497		- // Fetch the article content and associated product URL
3498		- $query = $wpdb->prepare("SELECT article_content, source_url FROM {$system_prompt_table} WHERE id = %d", $most_relevant_id);
3499		- $result = $wpdb->get_row($query);
3500		-
3501		- if ($result) {
3502		- // Append the product link to the content if available
3503		- $content = $result->article_content;
3504		- if (!empty($result->source_url)) {
3505		- $content .= "\n\nFor more details, check out this product: " . esc_url($result->source_url);
3506		- }
3507		- return $content;
3508		- }
3509		-
3510		- return null;
3511		-}
3512		-
3513		-// Function definition
3514		-private function mxchat_generate_response($relevant_content, $api_key, $xai_api_key, $claude_api_key, $deepseek_api_key, $conversation_history) {
3515		- try {
3516		- if (!$relevant_content) {
3517		- return esc_html__("I'm sorry, I couldn't find relevant information on that topic.", 'mxchat');
3518		- }
3519		-
3520		- // Ensure conversation_history is an array
3521		- if (!is_array($conversation_history)) {
3522		- $conversation_history = array();
3523		- }
3524		-
3525		- // Get selected model with default fallback
3526		- $selected_model = isset($this->options['model']) ? $this->options['model'] : 'gpt-4o';
3527		-
3528		- // Extract model prefix to determine the provider
3529		- $model_parts = explode('-', $selected_model);
3530		- $provider = strtolower($model_parts[0]);
3531		-
3532		- // Handle model selection based on provider prefix
3533		- switch ($provider) {
3534		- case 'claude':
3535		- if (empty($claude_api_key)) {
3536		- throw new Exception(esc_html__('Claude API key is not configured', 'mxchat'));
3537		- }
3538		- return $this->mxchat_generate_response_claude(
3539		- $selected_model,
3540		- $claude_api_key,
3541		- $conversation_history,
3542		- $relevant_content
3543		- );
3544		-
3545		- case 'grok':
3546		- if (empty($xai_api_key)) {
3547		- throw new Exception(esc_html__('X.AI API key is not configured', 'mxchat'));
3548		- }
3549		- return $this->mxchat_generate_response_xai(
3550		- $selected_model,
3551		- $xai_api_key,
3552		- $conversation_history,
3553		- $relevant_content
3554		- );
3555		-
3556		- case 'deepseek':
3557		- if (empty($deepseek_api_key)) {
3558		- throw new Exception(esc_html__('DeepSeek API key is not configured', 'mxchat'));
3559		- }
3560		- return $this->mxchat_generate_response_deepseek(
3561		- $selected_model,
3562		- $deepseek_api_key,
3563		- $conversation_history,
3564		- $relevant_content
3565		- );
3566		-
3567		- case 'gpt':
3568		- if (empty($api_key)) {
3569		- throw new Exception(esc_html__('OpenAI API key is not configured', 'mxchat'));
3570		- }
3571		- return $this->mxchat_generate_response_openai(
3572		- $selected_model,
3573		- $api_key,
3574		- $conversation_history,
3575		- $relevant_content
3576		- );
3577		-
3578		- default:
3579		- // Default to OpenAI for custom models or unrecognized prefixes
3580		- if (empty($api_key)) {
3581		- throw new Exception(esc_html__('OpenAI API key is not configured', 'mxchat'));
3582		- }
3583		- return $this->mxchat_generate_response_openai(
3584		- $selected_model,
3585		- $api_key,
3586		- $conversation_history,
3587		- $relevant_content
3588		- );
3589		- }
3590		- } catch (Exception $e) {
3591		- //error_log('MXChat Error: ' . $e->getMessage());
3592		- return sprintf(
3593		- esc_html__('An error occurred: %s', 'mxchat'),
3594		- esc_html($e->getMessage())
3595		- );
3596		- }
3597		-}
3598		-
3599		-
3600		-private function mxchat_generate_response_deepseek($selected_model, $deepseek_api_key, $conversation_history, $relevant_content) {
3601		- // Ensure conversation_history is an array
3602		- if (!is_array($conversation_history)) {
3603		- $conversation_history = array();
3604		- }
3605		-
3606		- // Get system prompt instructions from options
3607		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3608		-
3609		- // Create a new array for the formatted conversation
3610		- $formatted_conversation = array();
3611		-
3612		- // Add system message first
3613		- $formatted_conversation[] = array(
3614		- 'role' => 'system',
3615		- 'content' => $system_prompt_instructions . " " . $relevant_content
3616		- );
3617		-
3618		- // Add the rest of the conversation history
3619		- foreach ($conversation_history as $message) {
3620		- if (is_array($message) && isset($message['role']) && isset($message['content'])) {
3621		- $role = $message['role'];
3622		-
3623		- // Convert roles to supported format
3624		- if ($role === 'bot' || $role === 'agent') {
3625		- $role = 'assistant';
3626		- }
3627		- if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
3628		- $role = 'user';
3629		- }
3630		-
3631		- $formatted_conversation[] = array(
3632		- 'role' => $role,
3633		- 'content' => $message['content']
3634		- );
3635		- }
3636		- }
3637		-
3638		- $body = json_encode([
3639		- 'model' => $selected_model,
3640		- 'messages' => $formatted_conversation,
3641		- 'temperature' => 0.8,
3642		- 'stream' => false
3643		- ]);
3644		-
3645		- $args = [
3646		- 'body' => $body,
3647		- 'headers' => [
3648		- 'Content-Type' => 'application/json',
3649		- 'Authorization' => 'Bearer ' . $deepseek_api_key,
3650		- ],
3651		- 'timeout' => 60,
3652		- 'redirection' => 5,
3653		- 'blocking' => true,
3654		- 'httpversion' => '1.0',
3655		- 'sslverify' => true,
3656		- ];
3657		-
3658		- $response = wp_remote_post('https://api.deepseek.com/v1/chat/completions', $args);
3659		-
3660		- if (is_wp_error($response)) {
3661		- //error_log('DeepSeek API Error: ' . $response->get_error_message());
3662		- return "Sorry, there was an error processing your request.";
3663		- }
3664		-
3665		- $response_body = wp_remote_retrieve_body($response);
3666		- $decoded_response = json_decode($response_body, true);
3667		-
3668		- if (isset($decoded_response['choices'][0]['message']['content'])) {
3669		- return trim($decoded_response['choices'][0]['message']['content']);
3670		- } else {
3671		- //error_log('DeepSeek API Response Format Error: ' . print_r($decoded_response, true));
3672		- return "Sorry, I couldn't process that request.";
3673		- }
3674		-}
3675		-
3676		-private function mxchat_generate_response_openai($selected_model, $api_key, $conversation_history, $relevant_content) {
3677		- // Ensure conversation_history is an array
3678		- if (!is_array($conversation_history)) {
3679		- $conversation_history = array();
3680		- }
3681		-
3682		- // Get system prompt instructions from options
3683		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3684		-
3685		- // Create a new array for the formatted conversation
3686		- $formatted_conversation = array();
3687		-
3688		- // Add system message first
3689		- $formatted_conversation[] = array(
3690		- 'role' => 'system',
3691		- 'content' => $system_prompt_instructions . " " . $relevant_content
3692		- );
3693		-
3694		- // Add the rest of the conversation history
3695		- foreach ($conversation_history as $message) {
3696		- if (is_array($message) && isset($message['role']) && isset($message['content'])) {
3697		- $role = $message['role'];
3698		-
3699		- // Convert roles to supported format
3700		- if ($role === 'bot' || $role === 'agent') {
3701		- $role = 'assistant';
3702		- }
3703		- if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
3704		- $role = 'user';
3705		- }
3706		-
3707		- $formatted_conversation[] = array(
3708		- 'role' => $role,
3709		- 'content' => $message['content']
3710		- );
3711		- }
3712		- }
3713		-
3714		- $body = json_encode([
3715		- 'model' => $selected_model,
3716		- 'messages' => $formatted_conversation,
3717		- 'temperature' => 0.8,
3718		- 'stream' => false
3719		- ]);
3720		-
3721		- $args = [
3722		- 'body' => $body,
3723		- 'headers' => [
3724		- 'Content-Type' => 'application/json',
3725		- 'Authorization' => 'Bearer ' . $api_key,
3726		- ],
3727		- 'timeout' => 60,
3728		- 'redirection' => 5,
3729		- 'blocking' => true,
3730		- 'httpversion' => '1.0',
3731		- 'sslverify' => true,
3732		- ];
3733		-
3734		- $response = wp_remote_post('https://api.openai.com/v1/chat/completions', $args);
3735		-
3736		- if (is_wp_error($response)) {
3737		- //error_log('OpenAI API Error: ' . $response->get_error_message());
3738		- return "Sorry, there was an error processing your request.";
3739		- }
3740		-
3741		- $response_body = wp_remote_retrieve_body($response);
3742		- $decoded_response = json_decode($response_body, true);
3743		-
3744		- if (isset($decoded_response['choices'][0]['message']['content'])) {
3745		- return trim($decoded_response['choices'][0]['message']['content']);
3746		- } else {
3747		- //error_log('OpenAI API Response Format Error: ' . print_r($decoded_response, true));
3748		- return "Sorry, I couldn't process that request.";
3749		- }
3750		-}
3751		-private function mxchat_generate_response_xai($selected_model, $xai_api_key, $conversation_history, $relevant_content) {
3752		- // Get system prompt instructions from options
3753		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3754		-
3755		- // Add system prompt to relevant content
3756		- $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
3757		-
3758		- // Prepend system instructions to the conversation history
3759		- array_unshift($conversation_history, [
3760		- 'role' => 'system',
3761		- 'content' => "Here are your instructions: " . $content_with_instructions
3762		- ]);
3763		-
3764		- // Ensure consistency: Replace 'bot' and 'agent' roles with supported values
3765		- foreach ($conversation_history as &$message) {
3766		- if ($message['role'] === 'bot') {
3767		- $message['role'] = 'assistant';
3768		- } elseif ($message['role'] === 'agent') {
3769		- // Tag the message as coming from a live agent
3770		- $message['role'] = 'assistant';
3771		- if (!isset($message['metadata'])) {
3772		- $message['metadata'] = ['source' => 'live_agent'];
3773		- }
3774		- }
3775		-
3776		- // Ensure all roles are valid
3777		- if (!in_array($message['role'], ['system', 'assistant', 'user', 'function', 'tool'])) {
3778		- $message['role'] = 'user'; // Default to 'user'
3779		- }
3780		- }
3781		-
3782		-
3783		- // Build the request body
3784		- $body = json_encode([
3785		- 'model' => $selected_model,
3786		- 'messages' => $conversation_history,
3787		- 'temperature' => 0.8,
3788		- 'stream' => false
3789		- ]);
3790		-
3791		- // Set up the API request
3792		- $args = [
3793		- 'body' => $body,
3794		- 'headers' => [
3795		- 'Content-Type' => 'application/json',
3796		- 'Authorization' => 'Bearer ' . $xai_api_key,
3797		- ],
3798		- 'timeout' => 60,
3799		- 'redirection' => 5,
3800		- 'blocking' => true,
3801		- 'httpversion' => '1.0',
3802		- 'sslverify' => true,
3803		- ];
3804		-
3805		- // Make the API request
3806		- $response = wp_remote_post('https://api.x.ai/v1/chat/completions', $args);
3807		-
3808		- // Process the response
3809		- if (is_wp_error($response)) {
3810		- return "Sorry, there was an error processing your request.";
3811		- }
3812		-
3813		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
3814		-
3815		- if (isset($response_body['choices'][0]['message']['content'])) {
3816		- return trim($response_body['choices'][0]['message']['content']);
3817		- } else {
3818		- return "Sorry, I couldn't process that request.";
3819		- }
3820		-}
3821		-
3822		-private function mxchat_generate_response_claude($selected_model, $claude_api_key, $conversation_history, $relevant_content) {
3823		- // Get system prompt instructions from options
3824		- $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
3825		-
3826		- // Clean and validate conversation history
3827		- foreach ($conversation_history as &$message) {
3828		- // Convert bot and agent roles to assistant
3829		- if ($message['role'] === 'bot' || $message['role'] === 'agent') {
3830		- $message['role'] = 'assistant';
3831		- }
3832		-
3833		- // Remove unsupported roles - Claude only supports 'assistant' and 'user'
3834		- if (!in_array($message['role'], ['assistant', 'user'])) {
3835		- $message['role'] = 'user';
3836		- }
3837		-
3838		- // Ensure content field exists
3839		- if (!isset($message['content']) || empty($message['content'])) {
3840		- $message['content'] = '';
3841		- }
3842		-
3843		- // Remove any unsupported fields
3844		- $message = array_intersect_key($message, array_flip(['role', 'content']));
3845		- }
3846		-
3847		- // Add relevant content as the latest user message
3848		- $conversation_history[] = [
3849		- 'role' => 'user',
3850		- 'content' => $relevant_content
3851		- ];
3852		-
3853		- // Build request body
3854		- $body = json_encode([
3855		- 'model' => $selected_model,
3856		- 'max_tokens' => 1000,
3857		- 'temperature' => 0.8,
3858		- 'messages' => $conversation_history,
3859		- 'system' => $system_prompt_instructions
3860		- ]);
3861		-
3862		- // Set up API request
3863		- $args = [
3864		- 'body' => $body,
3865		- 'headers' => [
3866		- 'Content-Type' => 'application/json',
3867		- 'x-api-key' => $claude_api_key,
3868		- 'anthropic-version' => '2023-06-01'
3869		- ],
3870		- 'timeout' => 60,
3871		- 'redirection' => 5,
3872		- 'blocking' => true,
3873		- 'httpversion' => '1.0',
3874		- 'sslverify' => true,
3875		- ];
3876		-
3877		- // Make API request
3878		- $response = wp_remote_post('https://api.anthropic.com/v1/messages', $args);
3879		-
3880		- // Check for WordPress errors
3881		- if (is_wp_error($response)) {
3882		- //error_log("Claude API request error: " . $response->get_error_message());
3883		- return "Sorry, there was an error connecting to the API.";
3884		- }
3885		-
3886		- // Check HTTP response code
3887		- $http_code = wp_remote_retrieve_response_code($response);
3888		- if ($http_code !== 200) {
3889		- $error_body = wp_remote_retrieve_body($response);
3890		- //error_log("Claude API HTTP error: " . $http_code . " - " . $error_body);
3891		-
3892		- // Try to extract error message from response
3893		- $error_data = json_decode($error_body, true);
3894		- $error_message = isset($error_data['error']['message']) ?
3895		- $error_data['error']['message'] :
3896		- "HTTP error " . $http_code;
3897		-
3898		- return "Sorry, the API returned an error: " . $error_message;
3899		- }
3900		-
3901		- // Parse response
3902		- $response_body = json_decode(wp_remote_retrieve_body($response), true);
3903		-
3904		- // Check for JSON decode errors
3905		- if (json_last_error() !== JSON_ERROR_NONE) {
3906		- //error_log("Claude API JSON decode error: " . json_last_error_msg());
3907		- return "Sorry, there was an error processing the API response.";
3908		- }
3909		-
3910		- // Extract and validate response content
3911		- if (isset($response_body['content']) &&
3912		- is_array($response_body['content']) &&
3913		- !empty($response_body['content']) &&
3914		- isset($response_body['content'][0]['text'])) {
3915		- return trim($response_body['content'][0]['text']);
3916		- }
3917		-
3918		- // Log unexpected response format
3919		- //error_log("Claude API unexpected response format: " . print_r($response_body, true));
3920		- return "Sorry, I received an unexpected response format from the API.";
3921		-}
3922		-public function mxchat_dismiss_pre_chat_message() {
3923		- // Get and sanitize the user identifier
3924		- $user_id = $this->mxchat_get_user_identifier();
3925		- $user_id = sanitize_key($user_id);
3926		-
3927		- // Set a transient to track that the user has dismissed the pre-chat message
3928		- $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
3929		- set_transient($transient_key, true, DAY_IN_SECONDS);
3930		-
3931		- wp_send_json_success();
3932		-}
3933		-
3934		-public function mxchat_check_pre_chat_message_status() {
3935		- // Get and sanitize the user identifier
3936		- $user_id = $this->mxchat_get_user_identifier();
3937		- $user_id = sanitize_key($user_id);
3938		-
3939		- // Check if the transient exists (i.e., if the message was dismissed)
3940		- $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
3941		- $dismissed = get_transient($transient_key);
3942		-
3943		- // Log the result to see if it's being set correctly
3944		- //error_log("Check pre-chat message dismissed for $user_id: " . ($dismissed ? 'Yes' : 'No'));
3945		-
3946		- if ($dismissed) {
3947		- wp_send_json_success(['dismissed' => true]);
3948		- } else {
3949		- wp_send_json_success(['dismissed' => false]);
3950		- }
3951		-
3952		- wp_die();
3953		-}
3954		-
3955		-private function mxchat_calculate_cosine_similarity($vectorA, $vectorB) {
3956		- if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) {
3957		- return 0;
3958		- }
3959		-
3960		- $dotProduct = array_sum(array_map(function ($a, $b) {
3961		- return $a * $b;
3962		- }, $vectorA, $vectorB));
3963		- $normA = sqrt(array_sum(array_map(function ($a) {
3964		- return $a * $a;
3965		- }, $vectorA)));
3966		- $normB = sqrt(array_sum(array_map(function ($b) {
3967		- return $b * $b;
3968		- }, $vectorB)));
3969		-
3970		- if ($normA == 0 || $normB == 0) {
3971		- return 0;
3972		- }
3973		-
3974		- return $dotProduct / ($normA * $normB);
3975		- }
3976		-
3977		-public function mxchat_enqueue_scripts_styles() {
3978		- // Define version numbers for the styles and scripts
3979		- $chat_style_version = '2.0.3'; // Replace with your actual version
3980		- $chat_script_version = '2.0.3'; // Replace with your actual version
3981		-
3982		- // Enqueue the script
3983		- wp_enqueue_script(
3984		- 'mxchat-chat-js',
3985		- plugin_dir_url(__FILE__) . '../js/chat-script.js',
3986		- array('jquery'),
3987		- $chat_script_version,
3988		- true
3989		- );
3990		-
3991		- // Enqueue the CSS
3992		- wp_enqueue_style(
3993		- 'mxchat-chat-css',
3994		- plugin_dir_url(__FILE__) . '../css/chat-style.css',
3995		- array(),
3996		- $chat_style_version
3997		- );
3998		-
3999		- // Fetch options from the database
4000		- $this->options = get_option('mxchat_options');
4001		- $prompts_options = get_option('mxchat_prompts_options', array());
4002		-
4003		- // Prepare settings for JavaScript
4004		- $style_settings = array(
4005		- 'ajax_url' => admin_url('admin-ajax.php'),
4006		- 'nonce' => wp_create_nonce('mxchat_chat_nonce'),
4007		- 'link_target_toggle' => $this->options['link_target_toggle'] ?? 'off',
4008		- 'rate_limit_message' => $this->options['rate_limit_message'] ?? 'Rate limit exceeded. Please try again later.',
4009		- 'complianz_toggle' => isset($this->options['complianz_toggle']) && $this->options['complianz_toggle'] === 'on',
4010		- 'user_message_bg_color' => $this->options['user_message_bg_color'] ?? '#fff',
4011		- 'user_message_font_color' => $this->options['user_message_font_color'] ?? '#212121',
4012		- 'bot_message_bg_color' => $this->options['bot_message_bg_color'] ?? '#212121',
4013		- 'bot_message_font_color' => $this->options['bot_message_font_color'] ?? '#fff',
4014		- 'top_bar_bg_color' => $this->options['top_bar_bg_color'] ?? '#212121',
4015		- 'send_button_font_color' => $this->options['send_button_font_color'] ?? '#212121',
4016		- 'close_button_color' => $this->options['close_button_color'] ?? '#fff',
4017		- 'chatbot_background_color' => $this->options['chatbot_background_color'] ?? '#212121',
4018		- 'chatbot_bg_color' => $this->options['chatbot_bg_color'] ?? '#fff',
4019		- 'icon_color' => $this->options['icon_color'] ?? '#fff',
4020		- 'chat_input_font_color' => $this->options['chat_input_font_color'] ?? '#212121',
4021		- 'chat_persistence_toggle' => $this->options['chat_persistence_toggle'] ?? 'off',
4022		- 'appendWidgetToBody' => $this->options['append_to_body'] ?? 'off', // Example for consistency
4023		-
4024		- 'live_agent_message_bg_color' => $this->options['live_agent_message_bg_color'] ?? '#ffffff',
4025		- 'live_agent_message_font_color' => $this->options['live_agent_message_font_color'] ?? '#333333',
4026		- 'chat_toolbar_toggle' => $this->options['chat_toolbar_toggle'] ?? 'off',
4027		- 'mode_indicator_bg_color' => $this->options['mode_indicator_bg_color'] ?? '#767676',
4028		- 'mode_indicator_font_color' => $this->options['mode_indicator_font_color'] ?? '#ffffff',
4029		- 'toolbar_icon_color' => $this->options['toolbar_icon_color'] ?? '#212121',
4030		-
4031		- 'use_pinecone' => $prompts_options['mxchat_use_pinecone'] ?? '0',
4032		- 'pinecone_enabled' => isset($prompts_options['mxchat_use_pinecone']) && $prompts_options['mxchat_use_pinecone'] === '1'
4033		- );
4034		-
4035		- // Pass the settings to the script
4036		- wp_localize_script('mxchat-chat-js', 'mxchatChat', $style_settings);
4037		-}
4038		-
4039		-
4040		-public function mxchat_reset_rate_limits() {
4041		- global $wpdb;
4042		-
4043		- // Define a cache key pattern for rate limits
4044		- $cache_key_pattern = 'mxchat_chat_limit_%';
4045		-
4046		- // Retrieve all option names matching the pattern
4047		- // phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.DirectDatabaseQuery.DirectQuery
4048		- $option_names = $wpdb->get_col("SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
4049		-
4050		- // db call ok; no-cache ok
4051		- // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery -- db call ok
4052		- $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
4053		-
4054		- // Clear the relevant cache entries
4055		- foreach ($option_names as $option_name) {
4056		- wp_cache_delete($option_name, 'options');
4057		- }
4058		-
4059		- // Optionally, clear a general cache if you have one
4060		- wp_cache_delete('mxchat_all_chat_limits', 'options');
4061		- }
4062		-
4063		-private function mxchat_fetch_woocommerce_products() {
4064		- // Ensure WooCommerce is active
4065		- if (!class_exists('WooCommerce')) {
4066		- return [];
4067		- }
4068		-
4069		- $args = array(
4070		- 'post_type' => 'product',
4071		- 'post_status' => 'publish',
4072		- 'posts_per_page' => -1,
4073		- );
4074		-
4075		- $products = get_posts($args);
4076		- $product_data = [];
4077		-
4078		- foreach ($products as $product) {
4079		- $product_id = $product->ID;
4080		- $product_obj = wc_get_product($product_id);
4081		-
4082		- $product_data[] = array(
4083		- 'id' => $product_id,
4084		- 'name' => $product_obj->get_name(),
4085		- 'description' => $product_obj->get_description(),
4086		- 'short_description' => $product_obj->get_short_description(),
4087		- 'url' => get_permalink($product_id),
4088		- 'price' => $product_obj->get_regular_price(),
4089		- 'sale_price' => $product_obj->get_sale_price(),
4090		- 'stock_status' => $product_obj->get_stock_status(),
4091		- 'sku' => $product_obj->get_sku(),
4092		- 'in_stock' => $product_obj->is_in_stock(),
4093		- 'total_sales' => $product_obj->get_total_sales(),
4094		- );
4095		- }
4096		-
4097		- return $product_data;
4098		-}
4099		-
4100		-}
4101		-?>
	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>', $message);
	706	+
	707	+// Check if any add-ons want to pre-process this message (for web search etc.)
	708	+$pre_processed_result = apply_filters('mxchat_pre_process_message', $message, $user_id, $session_id);
	709	+
	710	+// If the pre-processing returned a result (not the original message), use it directly
	711	+if (is_array($pre_processed_result) && isset($pre_processed_result['text'])) {
	712	+ // Save the AI response
	713	+ $this->mxchat_save_chat_message($session_id, 'bot', $pre_processed_result['text']);
	714	+
	715	+ // Save HTML content if provided
	716	+ if (!empty($pre_processed_result['html'])) {
	717	+ $this->mxchat_save_chat_message($session_id, 'bot', $pre_processed_result['html']);
	718	+ }
	719	+
	720	+ // Return the response
	721	+ wp_send_json([
	722	+ 'text' => $pre_processed_result['text'],
	723	+ 'html' => $pre_processed_result['html'] ?? '',
	724	+ 'session_id' => $session_id
	725	+ ]);
	726	+ wp_die();
	727	+}
	728	+
	729	+ // Save the user's message
	730	+ $this->mxchat_save_chat_message($session_id, 'user', $message);
	731	+
	732	+ // Check if the message is an email address
	733	+ if (is_email($message)) {
	734	+ // Add the email to Loops
	735	+ $this->add_email_to_loops($message);
	736	+
	737	+ // Send success response
	738	+ $response_message = $this->options['email_capture_response'] ??
	739	+ esc_html__('Thank you! Your coupon is on the way!', 'mxchat');
	740	+
	741	+ wp_send_json([
	742	+ 'success' => true,
	743	+ 'status' => 'email_captured',
	744	+ 'message' => $response_message
	745	+ ]);
	746	+ wp_die();
	747	+ }
	748	+
	749	+ $intent_info = '';
	750	+
	751	+ // Check chat mode
	752	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	753	+ //error_log("Chat Mode: $chat_mode");
	754	+
	755	+ // Handle agent mode
	756	+ if ($chat_mode === 'agent') {
	757	+ // First, check for switch intent before doing anything else
	758	+ $intent_matched = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
	759	+
	760	+ // If we matched an intent and it's the switch intent, handle it
	761	+ if ($intent_matched && !empty($this->fallbackResponse['text'])) {
	762	+ //error_log("Switch to chatbot intent detected");
	763	+
	764	+ // Update chat mode first
	765	+ update_option("mxchat_mode_{$session_id}", 'ai');
	766	+
	767	+ // Clear any existing PDF context to start fresh
	768	+ $this->clear_pdf_transients($session_id);
	769	+
	770	+ // Prepare clean switch response
	771	+ $response_data = [
	772	+ 'text' => $this->fallbackResponse['text'],
	773	+ 'html' => '',
	774	+ 'session_id' => $session_id,
	775	+ 'chat_mode' => 'ai'
	776	+ ];
	777	+
	778	+ // Save the mode switch message
	779	+ $this->mxchat_save_chat_message($session_id, 'system', esc_html__('Switched to AI chat mode', 'mxchat'));
	780	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['text']);
	781	+
	782	+ // Send response and exit
	783	+ wp_send_json($response_data);
	784	+ wp_die();
	785	+ } elseif (!$intent_matched) {
	786	+ // No intent matched, handle live agent message
	787	+ try {
	788	+ $this->mxchat_send_user_message_to_agent($message, $user_id, $session_id);
	789	+ //error_log("Message sent to agent.");
	790	+
	791	+ wp_send_json_success([
	792	+ 'status' => 'waiting_for_agent',
	793	+ 'message' => esc_html__('Message sent to live agent.', 'mxchat')
	794	+ ]);
	795	+ } catch (\Exception $e) {
	796	+ //error_log("Error sending message to agent: " . $e->getMessage());
	797	+ wp_send_json_error(esc_html__('Failed to send message to agent', 'mxchat'));
	798	+ }
	799	+ wp_die();
	800	+ }
	801	+ }
	802	+
	803	+ // Step 1: Check for new PDF URL in the message
	804	+ if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
	805	+ $new_pdf_url = $matches[0];
	806	+
	807	+ // Check if this is likely a PDF-related request
	808	+ $pdf_keywords = ['pdf', 'document', 'read', 'analyze'];
	809	+ $is_pdf_request = false;
	810	+
	811	+ foreach ($pdf_keywords as $keyword) {
	812	+ if (stripos($message, $keyword) !== false) {
	813	+ $is_pdf_request = true;
	814	+ break;
	815	+ }
	816	+ }
	817	+
	818	+ // If it looks like a PDF request or we're waiting for a PDF URL
	819	+ if ($is_pdf_request || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
	820	+ // Validate HTTPS
	821	+ if (wp_http_validate_url($new_pdf_url) && parse_url($new_pdf_url, PHP_URL_SCHEME) === 'https') {
	822	+ // Extract filename from URL
	823	+ $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
	824	+
	825	+ // Clear previous PDF transients
	826	+ $this->clear_pdf_transients($session_id);
	827	+
	828	+ // Process new PDF
	829	+ $max_pages = $this->options['pdf_max_pages'] ?? 69;
	830	+ $embeddings = $this->fetch_and_split_pdf_pages($new_pdf_url, $max_pages);
	831	+
	832	+ if ($embeddings === 'too_many_pages') {
	833	+ $error_text = sprintf(
	834	+ $this->options['pdf_intent_error_text'] ??
	835	+ esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
	836	+ $max_pages
	837	+ );
	838	+ $this->fallbackResponse['text'] = $error_text;
	839	+ } elseif ($embeddings) {
	840	+ // Store new PDF information
	841	+ // Create a more meaningful filename from URL
	842	+ $pdf_filename = basename(parse_url($new_pdf_url, PHP_URL_PATH));
	843	+
	844	+ // If the filename is generic (like results_download.php), create a more descriptive one
	845	+ if (in_array($pdf_filename, ['results_download.php', 'download.php', 'view.php', 'pdf.php']) ||
	846	+ strpos($pdf_filename, '.php') !== false) {
	847	+ // Create a timestamp-based name
	848	+ $pdf_filename = 'Document_' . date('Y-m-d_H-i') . '.pdf';
	849	+ }
	850	+
	851	+ set_transient('mxchat_pdf_url_' . $session_id, $new_pdf_url, HOUR_IN_SECONDS);
	852	+ set_transient('mxchat_pdf_filename_' . $session_id, $pdf_filename, HOUR_IN_SECONDS);
	853	+ set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
	854	+ set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
	855	+
	856	+ $success_text = $this->options['pdf_intent_success_text'] ??
	857	+ esc_html__("I've processed the new PDF '{$pdf_filename}'. What questions do you have about it?", 'mxchat');
	858	+
	859	+ // Return success with filename for UI update
	860	+ wp_send_json([
	861	+ 'success' => true,
	862	+ 'message' => $success_text,
	863	+ 'data' => [
	864	+ 'filename' => $pdf_filename
	865	+ ]
	866	+ ]);
	867	+ wp_die();
	868	+ } else {
	869	+ $error_text = $this->options['pdf_intent_error_text'] ??
	870	+ esc_html__("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
	871	+ $this->fallbackResponse['text'] = $error_text;
	872	+ }
	873	+
	874	+ wp_send_json([
	875	+ 'success' => false,
	876	+ 'message' => $this->fallbackResponse['text']
	877	+ ]);
	878	+ wp_die();
	879	+ }
	880	+ }
	881	+ }
	882	+
	883	+ // Step 2: Detect intent and handle intent-based responses
	884	+$intent_result = $this->mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id);
	885	+//error_log("Intent Result Type: " . gettype($intent_result));
	886	+
	887	+// Step 3: Handle the intent result appropriately
	888	+if ($intent_result !== false) {
	889	+ // The intent was matched and handled
	890	+ //error_log("Intent was matched and handled.");
	891	+
	892	+ if (is_array($intent_result) && (isset($intent_result['text']) || isset($intent_result['html']))) {
	893	+ // Intent returned a direct response array
	894	+ //error_log("Intent returned a direct response.");
	895	+ $response_data = [
	896	+ 'text' => $intent_result['text'] ?? '',
	897	+ 'html' => $intent_result['html'] ?? '',
	898	+ 'session_id' => $session_id
	899	+ ];
	900	+
	901	+ wp_send_json($response_data);
	902	+ wp_die();
	903	+ }
	904	+ else if ($intent_result === true && (!empty($this->fallbackResponse['text']) || !empty($this->fallbackResponse['html']))) {
	905	+ // Intent returned true and set fallbackResponse
	906	+ //error_log("Intent returned true with fallbackResponse set.");
	907	+ $response_data = [
	908	+ 'text' => $this->fallbackResponse['text'] ?? '',
	909	+ 'html' => $this->fallbackResponse['html'] ?? '',
	910	+ 'session_id' => $session_id
	911	+ ];
	912	+
	913	+ wp_send_json($response_data);
	914	+ wp_die();
	915	+ }
	916	+
	917	+ // Intent was matched but no usable response was provided
	918	+ // This shouldn't happen with proper intent implementation
	919	+ //error_log("Warning: Intent matched but no response provided.");
	920	+}
	921	+
	922	+ // If we get here, no intent matched OR the intent didn't provide a usable response
	923	+ //error_log("No matching intent or usable response. Generating AI response.");
	924	+
	925	+ // Step 4: Generate AI response
	926	+ $conversation_history = $this->mxchat_fetch_conversation_history_for_ai($session_id);
	927	+ $this->mxchat_increment_chat_count();
	928	+
	929	+ // Generate embedding for the user's query
	930	+ $user_message_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
	931	+
	932	+ // Check if the embedding generation returned an error
	933	+ if (is_array($user_message_embedding) && isset($user_message_embedding['error'])) {
	934	+ $error_message = $user_message_embedding['error'];
	935	+ $error_code = $user_message_embedding['error_code'] ?? 'embedding_error';
	936	+
	937	+ //error_log("Embedding error for session $session_id: $error_message (Code: $error_code)");
	938	+
	939	+ // Important: Structure the error data correctly for wp_send_json_error
	940	+ wp_send_json_error([
	941	+ 'error_message' => $error_message,
	942	+ 'error_code' => $error_code
	943	+ ]);
	944	+ wp_die();
	945	+ }
	946	+
	947	+ // Check if the embedding is valid
	948	+ if (!is_array($user_message_embedding) || empty($user_message_embedding)) {
	949	+ //error_log("Failed to generate message embedding for session $session_id");
	950	+ wp_send_json_error([
	951	+ 'error_message' => esc_html__('Unable to process your message. The embedding service is not responding correctly.', 'mxchat'),
	952	+ 'error_code' => 'invalid_embedding'
	953	+ ]);
	954	+ wp_die();
	955	+ }
	956	+
	957	+ // Build context with both knowledge base and PDF content if available
	958	+ $context_content = "User asked: '{$message}'\n\n";
	959	+
	960	+
	961	+ // Get relevant content from knowledge base
	962	+ $relevant_content = $this->mxchat_find_relevant_content($user_message_embedding);
	963	+ if (!empty($relevant_content)) {
	964	+ $context_content .= "Relevant content from knowledge database:\n" . $relevant_content . "\n\n";
	965	+ }
	966	+
	967	+
	968	+ // Check for and include PDF content
	969	+ $pdf_url = get_transient('mxchat_pdf_url_' . $session_id);
	970	+ $pdf_embeddings = get_transient('mxchat_pdf_embeddings_' . $session_id);
	971	+ $pdf_filename = get_transient('mxchat_pdf_filename_' . $session_id);
	972	+ if ($pdf_url && $pdf_embeddings && get_transient('mxchat_include_pdf_in_context_' . $session_id)) {
	973	+ $relevant_pdf_pages = $this->find_relevant_pdf_pages($user_message_embedding, $pdf_embeddings);
	974	+ if (!empty($relevant_pdf_pages)) {
	975	+ $context_content .= "Relevant content from PDF document '{$pdf_filename}':\n";
	976	+ foreach ($relevant_pdf_pages as $page_data) {
	977	+ $context_content .= "Page {$page_data['page_number']} of '{$pdf_filename}': {$page_data['text']}\n";
	978	+ }
	979	+ $context_content .= "\n";
	980	+ }
	981	+ }
	982	+
	983	+ // Check for and include Word content
	984	+ $word_url = get_transient('mxchat_word_url_' . $session_id);
	985	+ $word_embeddings = get_transient('mxchat_word_embeddings_' . $session_id);
	986	+ $word_filename = get_transient('mxchat_word_filename_' . $session_id);
	987	+ if ($word_url && $word_embeddings && get_transient('mxchat_include_word_in_context_' . $session_id)) {
	988	+ $relevant_word_chunks = $this->word_handler->mxchat_find_relevant_word_chunks($user_message_embedding, $word_embeddings);
	989	+ if (!empty($relevant_word_chunks)) {
	990	+ $context_content .= "Relevant content from Word document '{$word_filename}':\n";
	991	+ foreach ($relevant_word_chunks as $chunk_data) {
	992	+ $context_content .= "Section {$chunk_data['chunk_number']} of '{$word_filename}': {$chunk_data['text']}\n";
	993	+ }
	994	+ $context_content .= "\n";
	995	+ }
	996	+ }
	997	+
	998	+ $context_content = apply_filters('mxchat_prepare_context', $context_content, $session_id);
	999	+
	1000	+ // Generate the response using the full context
	1001	+ $response = $this->mxchat_generate_response(
	1002	+ $context_content,
	1003	+ $this->options['api_key'],
	1004	+ $this->options['xai_api_key'],
	1005	+ $this->options['claude_api_key'],
	1006	+ $this->options['deepseek_api_key'],
	1007	+ $this->options['gemini_api_key'],
	1008	+ $conversation_history
	1009	+ );
	1010	+
	1011	+ // Check if the response is an error array
	1012	+ if (is_array($response) && isset($response['error'])) {
	1013	+ //error_log("AI Response Error: " . $response['error'] . " (Code: " . ($response['error_code'] ?? 'unknown') . ")");
	1014	+
	1015	+ // Send a user-friendly error message
	1016	+ wp_send_json_error([
	1017	+ 'error_message' => $response['error'],
	1018	+ 'error_code' => $response['error_code'] ?? 'api_error'
	1019	+ ]);
	1020	+ wp_die();
	1021	+ }
	1022	+
	1023	+ // If we get here, the response is valid text
	1024	+ $this->mxchat_save_chat_message($session_id, 'bot', $response);
	1025	+
	1026	+ // Step 5: Save additional content if available
	1027	+ if (!empty($this->productCardHtml)) {
	1028	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->productCardHtml);
	1029	+ }
	1030	+
	1031	+ if (!empty($this->fallbackResponse['html'])) {
	1032	+ $this->mxchat_save_chat_message($session_id, 'bot', $this->fallbackResponse['html']);
	1033	+ }
	1034	+
	1035	+ // Step 6: Return the response
	1036	+ $response_data = [
	1037	+ 'text' => $response,
	1038	+ 'html' => !empty($this->productCardHtml) ? $this->productCardHtml : ($this->fallbackResponse['html'] ?? ''),
	1039	+ 'session_id' => $session_id
	1040	+ ];
	1041	+
	1042	+ wp_send_json($response_data);
	1043	+ wp_die();
	1044	+}
	1045	+
	1046	+// Updated function to check intents and invoke the callback function
	1047	+private function mxchat_check_intent_and_invoke_callback($message, $user_id, $session_id) {
	1048	+ global $wpdb;
	1049	+ $chat_mode = get_option("mxchat_mode_{$session_id}", 'ai');
	1050	+
	1051	+ //error_log('🔍 MXCHAT DEBUG: Intent Check Started ==================');
	1052	+ //error_log("🔍 MXCHAT DEBUG: Message: '$message'");
	1053	+ //error_log("🔍 MXCHAT DEBUG: Chat Mode: $chat_mode");
	1054	+
	1055	+ // Generate the user embedding
	1056	+ //error_log('🔄 MXCHAT DEBUG: Generating user embedding');
	1057	+ $user_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
	1058	+
	1059	+ // Check if embedding generation returned an error
	1060	+ if (is_array($user_embedding) && isset($user_embedding['error'])) {
	1061	+ $error_message = $user_embedding['error'];
	1062	+ $error_code = $user_embedding['error_code'] ?? 'embedding_error';
	1063	+
	1064	+ //error_log("❌ MXCHAT DEBUG: Embedding error: $error_message (Code: $error_code)");
	1065	+
	1066	+ // Send the error to the frontend
	1067	+ wp_send_json_error([
	1068	+ 'error_message' => $error_message,
	1069	+ 'error_code' => $error_code
	1070	+ ]);
	1071	+ wp_die();
	1072	+ }
	1073	+
	1074	+ // Check if embedding is valid (not an error and is an array)
	1075	+ if (!is_array($user_embedding) || empty($user_embedding)) {
	1076	+ //error_log('❌ MXCHAT DEBUG: Failed to generate user embedding');
	1077	+
	1078	+ // Send a generic error to the frontend
	1079	+ wp_send_json_error([
	1080	+ 'error_message' => esc_html__('Unable to process your message. The embedding service is not responding correctly.', 'mxchat'),
	1081	+ 'error_code' => 'invalid_embedding'
	1082	+ ]);
	1083	+ wp_die();
	1084	+ }
	1085	+
	1086	+ //error_log('✅ MXCHAT DEBUG: User embedding generated successfully');
	1087	+
	1088	+ // Fetch intents from the database
	1089	+ $table_name = $wpdb->prefix . 'mxchat_intents';
	1090	+ if ($chat_mode === 'agent') {
	1091	+ //error_log('🔍 MXCHAT DEBUG: Agent mode - fetching only chatbot switch intent');
	1092	+ $query = $wpdb->prepare(
	1093	+ "SELECT * FROM $table_name WHERE callback_function = %s AND (enabled = 1 OR enabled IS NULL)",
	1094	+ 'mxchat_handle_switch_to_chatbot_intent'
	1095	+ );
	1096	+ $intents = $wpdb->get_results($query);
	1097	+ } else {
	1098	+ //error_log('🔍 MXCHAT DEBUG: AI mode - fetching all enabled intents');
	1099	+ // Only fetch enabled intents (either explicitly enabled with 1 or implicitly enabled with NULL for backward compatibility)
	1100	+ $intents = $wpdb->get_results("SELECT * FROM $table_name WHERE enabled = 1 OR enabled IS NULL");
	1101	+ }
	1102	+
	1103	+ //error_log('🔍 MXCHAT DEBUG: Found ' . count($intents) . ' enabled intents to check');
	1104	+
	1105	+ if (empty($intents)) {
	1106	+ //error_log('❌ MXCHAT DEBUG: No enabled intents found in database');
	1107	+ return false;
	1108	+ }
	1109	+
	1110	+ $highest_similarity = -INF;
	1111	+ $matched_intent = null;
	1112	+
	1113	+ //error_log('📊 MXCHAT DEBUG: Intent Similarity Scores ==================');
	1114	+ foreach ($intents as $intent) {
	1115	+ //error_log("🔄 MXCHAT DEBUG: Checking intent: '{$intent->intent_label}' (callback: {$intent->callback_function})");
	1116	+
	1117	+ // Additional check for enabled state in case database structure was modified
	1118	+ $is_enabled = isset($intent->enabled) ? (bool)$intent->enabled : true;
	1119	+ if (!$is_enabled) {
	1120	+ //error_log("⚠️ MXCHAT DEBUG: Skipping disabled intent: {$intent->intent_label}");
	1121	+ continue;
	1122	+ }
	1123	+
	1124	+ $intent_embedding_serialized = $intent->embedding_vector;
	1125	+ $intent_embedding = $intent_embedding_serialized
	1126	+ ? unserialize($intent_embedding_serialized, ['allowed_classes' => false])
	1127	+ : null;
	1128	+
	1129	+ if (!is_array($intent_embedding)) {
	1130	+ //error_log("❌ MXCHAT DEBUG: Invalid embedding for intent: {$intent->intent_label}");
	1131	+ continue;
	1132	+ }
	1133	+
	1134	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $intent_embedding);
	1135	+ $intent_threshold = isset($intent->similarity_threshold) ? $intent->similarity_threshold : 0.85;
	1136	+
	1137	+ //error_log("📊 MXCHAT DEBUG: Intent '{$intent->intent_label}' similarity: {$similarity}, threshold: {$intent_threshold}");
	1138	+
	1139	+ if ($similarity >= $intent_threshold && $similarity > $highest_similarity) {
	1140	+ $highest_similarity = $similarity;
	1141	+ $matched_intent = $intent;
	1142	+ //error_log("✅ MXCHAT DEBUG: New best match: '{$intent->intent_label}' with similarity {$similarity}");
	1143	+ }
	1144	+ }
	1145	+ //error_log('📊 MXCHAT DEBUG: End Intent Scores ==================');
	1146	+
	1147	+ if ($matched_intent) {
	1148	+ //error_log("🎯 MXCHAT DEBUG: Final Intent Match: '{$matched_intent->intent_label}'");
	1149	+ //error_log("🔄 MXCHAT DEBUG: Invoking callback: {$matched_intent->callback_function}");
	1150	+
	1151	+ // If the callback is a method on this instance (core callback), call it directly
	1152	+ if (method_exists($this, $matched_intent->callback_function)) {
	1153	+ //error_log('🔍 MXCHAT DEBUG: Using direct method call for core callback');
	1154	+ $callback_result = call_user_func(
	1155	+ [$this, $matched_intent->callback_function],
	1156	+ $message,
	1157	+ $user_id,
	1158	+ $session_id,
	1159	+ $matched_intent,
	1160	+ $user_context
	1161	+ );
	1162	+ } else {
	1163	+ //error_log('🔍 MXCHAT DEBUG: Using apply_filters for add-on callback');
	1164	+ // Otherwise, use apply_filters for add-on callbacks
	1165	+ $callback_result = apply_filters(
	1166	+ $matched_intent->callback_function,
	1167	+ false, // default return value
	1168	+ $message,
	1169	+ $user_id,
	1170	+ $session_id,
	1171	+ $matched_intent
	1172	+ );
	1173	+ }
	1174	+
	1175	+ //error_log('🔍 MXCHAT DEBUG: Callback result type: ' . gettype($callback_result));
	1176	+ if ($callback_result !== false) {
	1177	+ //error_log('✅ MXCHAT DEBUG: Intent handled successfully');
	1178	+ $this->fallbackResponse = $callback_result;
	1179	+ return true;
	1180	+ }
	1181	+ //error_log('❌ MXCHAT DEBUG: Callback returned false');
	1182	+ } else {
	1183	+ //error_log('❌ MXCHAT DEBUG: No matching intent found');
	1184	+ }
	1185	+
	1186	+ //error_log('🔍 MXCHAT DEBUG: Intent Check Completed ==================');
	1187	+ return false;
	1188	+}
	1189	+
	1190	+
	1191	+
	1192	+
	1193	+// Helper function to clear PDF and Word document related transients
	1194	+private function clear_pdf_transients($session_id) {
	1195	+ // PDF transients
	1196	+ delete_transient('mxchat_pdf_url_' . $session_id);
	1197	+ delete_transient('mxchat_pdf_embeddings_' . $session_id);
	1198	+ delete_transient('mxchat_include_pdf_in_context_' . $session_id);
	1199	+ delete_transient('mxchat_waiting_for_pdf_url_' . $session_id);
	1200	+
	1201	+ // Word document transients
	1202	+ delete_transient('mxchat_word_url_' . $session_id);
	1203	+ delete_transient('mxchat_word_filename_' . $session_id);
	1204	+ delete_transient('mxchat_word_embeddings_' . $session_id);
	1205	+ delete_transient('mxchat_include_word_in_context_' . $session_id);
	1206	+ delete_transient('mxchat_waiting_for_word_' . $session_id);
	1207	+}
	1208	+
	1209	+
	1210	+
	1211	+//verified good
	1212	+public function mxchat_handle_email_capture($message, $user_id, $session_id) {
	1213	+ // Log the message safely
	1214	+ //error_log("Triggered email capture intent for message: " . sanitize_text_field($message));
	1215	+
	1216	+ // Initiate email capture flow
	1217	+ $response = esc_html($this->options['triggered_phrase_response'] ?? esc_html__("Would you like to join our mailing list? Please provide your email below.", 'mxchat'));
	1218	+
	1219	+ set_transient('mxchat_email_capture_' . $user_id, true, 5 * MINUTE_IN_SECONDS);
	1220	+ $this->mxchat_save_chat_message($session_id, 'bot', $response);
	1221	+
	1222	+ // Respond to the user
	1223	+ wp_send_json(['message' => $response]);
	1224	+ wp_die();
	1225	+}
	1226	+
	1227	+public function mxchat_generate_image($message, $user_id, $session_id) {
	1228	+ //error_log("Starting image generation for message: " . $message);
	1229	+
	1230	+ // Prepare a prompt for DALL-E
	1231	+ $prompt = esc_html__('Create an image of ', 'mxchat') . sanitize_text_field($message);
	1232	+
	1233	+ // Use the existing OpenAI API key
	1234	+ $openai_api_key = sanitize_text_field($this->options['api_key']);
	1235	+
	1236	+ // Call DALL-E to generate an image
	1237	+ $image_response = $this->mxchat_generate_dalle_image($prompt, $openai_api_key);
	1238	+
	1239	+ // Check if the response contains an image URL
	1240	+ if (isset($image_response['imageUrl'])) {
	1241	+ $image_url = esc_url_raw($image_response['imageUrl']);
	1242	+
	1243	+ // Construct the HTML with a CSS class instead of inline styles
	1244	+ $response_html = '<img src="' . esc_url($image_url) . '" alt="' . esc_attr__('Generated Image', 'mxchat') . '" class="mxchat-generated-image" />';
	1245	+ $response_text = esc_html__('Here is the image I generated:', 'mxchat');
	1246	+
	1247	+ // Save the bot message with both text and HTML
	1248	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	1249	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_html);
	1250	+
	1251	+ // Set the fallback response for the chat handler
	1252	+ $this->fallbackResponse = [
	1253	+ 'text' => $response_text,
	1254	+ 'html' => $response_html,
	1255	+ 'images' => [$image_url]
	1256	+ ];
	1257	+
	1258	+ // For debugging/verification - Use json_encode to verify what's being set
	1259	+ //error_log("Image generation successful - fallbackResponse set: " . json_encode($this->fallbackResponse));
	1260	+
	1261	+ // Return the response directly instead of relying on the property
	1262	+ return $this->fallbackResponse;
	1263	+ } else {
	1264	+ $response_text = esc_html__("I'm sorry, but I couldn't generate an image based on your request.", 'mxchat');
	1265	+
	1266	+ // Save the error message
	1267	+ $this->mxchat_save_chat_message($session_id, 'bot', $response_text);
	1268	+
	1269	+ // Set the fallback response for the chat handler
	1270	+ $this->fallbackResponse = [
	1271	+ 'text' => $response_text,
	1272	+ 'html' => '',
	1273	+ 'images' => []
	1274	+ ];
	1275	+
	1276	+ //error_log("DALL-E image generation error: " . esc_html($image_response['error'] ?? 'Unknown error.'));
	1277	+ //error_log("Error fallbackResponse set: " . json_encode($this->fallbackResponse));
	1278	+
	1279	+ // Return the response directly instead of relying on the property
	1280	+ return $this->fallbackResponse;
	1281	+ }
	1282	+}
	1283	+private function mxchat_generate_dalle_image($prompt, $api_key, $model = 'dall-e-3', $timeout = 60) {
	1284	+ $api_url = 'https://api.openai.com/v1/images/generations';
	1285	+ $body = json_encode([
	1286	+ 'prompt' => sanitize_text_field($prompt),
	1287	+ 'n' => 1,
	1288	+ 'size' => '1024x1024',
	1289	+ 'model' => sanitize_text_field($model),
	1290	+ ]);
	1291	+
	1292	+ $args = [
	1293	+ 'body' => $body,
	1294	+ 'headers' => [
	1295	+ 'Content-Type' => 'application/json',
	1296	+ 'Authorization' => 'Bearer ' . sanitize_text_field($api_key),
	1297	+ ],
	1298	+ 'method' => 'POST',
	1299	+ 'timeout' => absint($timeout),
	1300	+ ];
	1301	+
	1302	+ $response = wp_remote_post($api_url, $args);
	1303	+
	1304	+ if (is_wp_error($response)) {
	1305	+ //error_log("DALL-E request failed: " . $response->get_error_message());
	1306	+ return ['error' => esc_html__('Error generating image: ', 'mxchat') . $response->get_error_message()];
	1307	+ }
	1308	+
	1309	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	1310	+
	1311	+ if (isset($response_body['data'][0]['url'])) {
	1312	+ return ['imageUrl' => esc_url_raw($response_body['data'][0]['url'])];
	1313	+ } else {
	1314	+ //error_log("DALL-E response error: " . wp_remote_retrieve_body($response));
	1315	+ return ['error' => esc_html__('Failed to generate image.', 'mxchat')];
	1316	+ }
	1317	+}
	1318	+
	1319	+/**
	1320	+ * Handle web search requests.
	1321	+ *
	1322	+ * Sends the refined search query to the Brave Search API and uses the
	1323	+ * results to generate a conversational response with the AI model.
	1324	+ *
	1325	+ * @since 1.0.0
	1326	+ * @param string $message The user's search query.
	1327	+ * @param string $user_id The user identifier.
	1328	+ * @param string $session_id The current session ID.
	1329	+ * @return array Response array containing text with embedded HTML links
	1330	+ */
	1331	+public function mxchat_handle_search_request($message, $user_id, $session_id) {
	1332	+ // Step 1: Interpret and refine the search query
	1333	+ $refined_search_query = $this->mxchat_interpret_search_query($message);
	1334	+ if (empty($refined_search_query)) {
	1335	+ return array(
	1336	+ 'text' => esc_html__('I apologize, but could you please rephrase your search request?', 'mxchat'),
	1337	+ 'html' => ''
	1338	+ );
	1339	+ }
	1340	+
	1341	+ // Retrieve and validate API settings
	1342	+ $options = get_option('mxchat_options');
	1343	+ $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
	1344	+ $results_count = isset($options['brave_results_count']) ? absint($options['brave_results_count']) : 5;
	1345	+
	1346	+ if (empty($api_key)) {
	1347	+ return array(
	1348	+ 'text' => esc_html__('Search functionality is temporarily unavailable. Please try again later.', 'mxchat'),
	1349	+ 'html' => ''
	1350	+ );
	1351	+ }
	1352	+
	1353	+ // Build the API request URL
	1354	+ $api_url = add_query_arg(
	1355	+ array(
	1356	+ 'q' => rawurlencode($refined_search_query),
	1357	+ 'count' => $results_count,
	1358	+ 'text_decorations' => 'true',
	1359	+ 'rich_data' => 'true',
	1360	+ ),
	1361	+ 'https://api.search.brave.com/res/v1/web/search'
	1362	+ );
	1363	+
	1364	+ // Attempt to retrieve cached results first
	1365	+ $transient_key = 'mxchat_search_' . md5($refined_search_query);
	1366	+ $results = get_transient($transient_key);
	1367	+
	1368	+ if (false === $results) {
	1369	+ // Fetch new results from the Brave Search API
	1370	+ $response = wp_remote_get(
	1371	+ $api_url,
	1372	+ array(
	1373	+ 'headers' => array(
	1374	+ 'Accept' => 'application/json',
	1375	+ 'Accept-Encoding' => 'gzip',
	1376	+ 'X-Subscription-Token'=> $api_key,
	1377	+ ),
	1378	+ 'timeout' => 10,
	1379	+ )
	1380	+ );
	1381	+
	1382	+ if (is_wp_error($response)) {
	1383	+ return array(
	1384	+ 'text' => esc_html__('I encountered an error while searching. Please try again.', 'mxchat'),
	1385	+ 'html' => ''
	1386	+ );
	1387	+ }
	1388	+
	1389	+ $results = json_decode(wp_remote_retrieve_body($response), true);
	1390	+
	1391	+ if (json_last_error() !== JSON_ERROR_NONE) {
	1392	+ return array(
	1393	+ 'text' => esc_html__('I received an invalid response from the search service.', 'mxchat'),
	1394	+ 'html' => ''
	1395	+ );
	1396	+ }
	1397	+
	1398	+ // Cache results for one hour
	1399	+ set_transient($transient_key, $results, HOUR_IN_SECONDS);
	1400	+ }
	1401	+
	1402	+ // Process results
	1403	+ if (!empty($results['web']['results']) && is_array($results['web']['results'])) {
	1404	+ // Create a more straightforward summary with HTML links
	1405	+ $search_results_text = '';
	1406	+
	1407	+ // Add a simple intro
	1408	+ $search_results_text .= sprintf(
	1409	+ esc_html__("Here's what I found about '%s':", 'mxchat'),
	1410	+ esc_html($refined_search_query)
	1411	+ );
	1412	+
	1413	+ // Add the top results with HTML links
	1414	+ foreach (array_slice($results['web']['results'], 0, 5) as $result) {
	1415	+ $title = isset($result['title']) ? wp_strip_all_tags($result['title']) : '';
	1416	+ $url = isset($result['url']) ? esc_url($result['url']) : '';
	1417	+ $description = isset($result['description']) ? wp_strip_all_tags($result['description']) : '';
	1418	+
	1419	+ // Add a line break after the intro
	1420	+ $search_results_text .= '<br><br>';
	1421	+
	1422	+ // Add title as a link
	1423	+ $search_results_text .= sprintf(
	1424	+ '<a href="%s" target="_blank" rel="noopener noreferrer">%s</a><br>',
	1425	+ $url,
	1426	+ $title
	1427	+ );
	1428	+
	1429	+ // Add a condensed description
	1430	+ $search_results_text .= sprintf("%s", $description);
	1431	+ }
	1432	+
	1433	+ // Save to chat history
	1434	+ $this->mxchat_save_chat_message($session_id, 'bot', $search_results_text);
	1435	+
	1436	+ // Return the formatted text with embedded HTML links
	1437	+ return array(
	1438	+ 'text' => $search_results_text,
	1439	+ 'html' => ''
	1440	+ );
	1441	+ } else {
	1442	+ return array(
	1443	+ 'text' => sprintf(
	1444	+ esc_html__('I searched for "%s" but couldn\'t find any relevant results. Would you like to try different search terms?', 'mxchat'),
	1445	+ esc_html($refined_search_query)
	1446	+ ),
	1447	+ 'html' => ''
	1448	+ );
	1449	+ }
	1450	+}
	1451	+/**
	1452	+ * Format search results into a natural text summary.
	1453	+ *
	1454	+ * @since 1.0.0
	1455	+ * @param array $results The search results from the API.
	1456	+ * @param string $query The original search query.
	1457	+ * @return string The text summary of the top results.
	1458	+ */
	1459	+private function format_search_results( $results, $query ) {
	1460	+ $summary = sprintf(
	1461	+ esc_html__( 'Here are the most relevant results for "%s":', 'mxchat' ),
	1462	+ esc_html( $query )
	1463	+ ) . "\n\n";
	1464	+
	1465	+ $max_results = min( count( $results ), 3 );
	1466	+ for ( $i = 0; $i < $max_results; $i++ ) {
	1467	+ $result = $results[ $i ];
	1468	+ $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
	1469	+ $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
	1470	+
	1471	+ // Append title and description to the summary
	1472	+ $summary .= sprintf(
	1473	+ "%s\n%s\n\n",
	1474	+ esc_html( $title ),
	1475	+ esc_html( $description )
	1476	+ );
	1477	+ }
	1478	+
	1479	+ return $summary;
	1480	+}
	1481	+
	1482	+/**
	1483	+ * Generate HTML markup for search results.
	1484	+ *
	1485	+ * @since 1.0.0
	1486	+ * @param array $results The search results from the API.
	1487	+ * @param string $query The user-refined query.
	1488	+ * @return string The HTML markup for displaying the results.
	1489	+ */
	1490	+private function generate_search_results_html( $results, $query ) {
	1491	+ ob_start();
	1492	+ ?>
	1493	+ <div class="mxchat-search-results">
	1494	+ <?php foreach ( $results as $result ) :
	1495	+ $title = isset( $result['title'] ) ? wp_strip_all_tags( $result['title'] ) : '';
	1496	+ $url = isset( $result['url'] ) ? esc_url( $result['url'] ) : '#';
	1497	+ $description = isset( $result['description'] ) ? wp_strip_all_tags( $result['description'] ) : '';
	1498	+ $favicon = isset( $result['meta_url']['favicon'] ) ? esc_url( $result['meta_url']['favicon'] ) : '';
	1499	+ $thumbnail = isset( $result['thumbnail']['src'] ) ? esc_url( $result['thumbnail']['src'] ) : '';
	1500	+ $domain = parse_url( $url, PHP_URL_HOST );
	1501	+ ?>
	1502	+ <div class="mxchat-search-item">
	1503	+ <div class="mxchat-search-header">
	1504	+ <?php if ( $favicon ) : ?>
	1505	+ <img
	1506	+ src="<?php echo esc_url( $favicon ); ?>"
	1507	+ class="mxchat-site-icon"
	1508	+ alt="<?php echo esc_attr__( 'Site icon', 'mxchat' ); ?>"
	1509	+ width="16"
	1510	+ height="16"
	1511	+ />
	1512	+ <?php endif; ?>
	1513	+ <div class="mxchat-site-url"><?php echo esc_html( $domain ); ?></div>
	1514	+ </div>
	1515	+
	1516	+ <div class="mxchat-search-content">
	1517	+ <h3 class="mxchat-search-title">
	1518	+ <a href="<?php echo esc_url( $url ); ?>"
	1519	+ target="_blank"
	1520	+ rel="noopener noreferrer"
	1521	+ >
	1522	+ <?php echo esc_html( $title ); ?>
	1523	+ </a>
	1524	+ </h3>
	1525	+
	1526	+ <?php if ( $thumbnail ) : ?>
	1527	+ <div class="mxchat-search-thumbnail">
	1528	+ <img
	1529	+ src="<?php echo esc_url( $thumbnail ); ?>"
	1530	+ alt="<?php echo esc_attr__( 'Thumbnail image', 'mxchat' ); ?>"
	1531	+ loading="lazy"
	1532	+ />
	1533	+ </div>
	1534	+ <?php endif; ?>
	1535	+
	1536	+ <div class="mxchat-search-description">
	1537	+ <?php echo esc_html( $description ); ?>
	1538	+ </div>
	1539	+ </div>
	1540	+ </div>
	1541	+ <?php endforeach; ?>
	1542	+ </div>
	1543	+ <?php
	1544	+ return ob_get_clean();
	1545	+}
	1546	+
	1547	+
	1548	+//very good
	1549	+public function mxchat_handle_image_search_request($message, $user_id, $session_id) {
	1550	+
	1551	+ // Step 1: Interpret the search query for better results
	1552	+ $refined_search_query = $this->mxchat_interpret_search_query($message);
	1553	+
	1554	+
	1555	+ // If no query was interpreted, return a fallback message
	1556	+ if (empty($refined_search_query)) {
	1557	+ $this->fallbackResponse = [
	1558	+ 'text' => __("I'm sorry, I couldn't interpret your search query. Please specify what you'd like to see images of.", 'mxchat'),
	1559	+ 'html' => "",
	1560	+ ];
	1561	+ return;
	1562	+ }
	1563	+
	1564	+ // Brave API URL
	1565	+ $api_url = 'https://api.search.brave.com/res/v1/images/search';
	1566	+
	1567	+ // Retrieve Brave API settings
	1568	+ $options = get_option('mxchat_options');
	1569	+ $api_key = isset($options['brave_api_key']) ? sanitize_text_field($options['brave_api_key']) : '';
	1570	+
	1571	+ if (empty($api_key)) {
	1572	+/*
	1573	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1574	+ //error_log("Brave API key is missing.");
	1575	+ }
	1576	+*/
	1577	+
	1578	+ $this->fallbackResponse = [
	1579	+ 'text' => __("API key is not configured. Please set it in the Brave Search Settings.", 'mxchat'),
	1580	+ 'html' => "",
	1581	+ ];
	1582	+ return;
	1583	+ }
	1584	+
	1585	+ $image_count = isset($options['brave_image_count']) ? intval($options['brave_image_count']) : 4;
	1586	+ $safe_search = isset($options['brave_safe_search']) ? sanitize_text_field($options['brave_safe_search']) : 'strict';
	1587	+
	1588	+ // Append query parameters based on settings
	1589	+ $api_url = add_query_arg([
	1590	+ 'q' => rawurlencode($refined_search_query),
	1591	+ 'count' => $image_count,
	1592	+ 'safesearch' => $safe_search,
	1593	+ ], $api_url);
	1594	+
	1595	+/*
	1596	+ // Log the final API URL for the search
	1597	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1598	+ //error_log("Final API URL for Brave Image Search: " . esc_url_raw($api_url));
	1599	+ }
	1600	+*/
	1601	+
	1602	+
	1603	+ // Implement caching
	1604	+ $transient_key = 'mxchat_image_search_' . md5($refined_search_query);
	1605	+ $body = get_transient($transient_key);
	1606	+
	1607	+ if (false === $body) {
	1608	+ $args = [
	1609	+ 'headers' => [
	1610	+ 'Accept' => 'application/json',
	1611	+ 'Accept-Encoding' => 'gzip',
	1612	+ 'X-Subscription-Token' => $api_key,
	1613	+ ],
	1614	+ 'timeout' => 10,
	1615	+ ];
	1616	+
	1617	+ $response = wp_remote_get($api_url, $args);
	1618	+
	1619	+ if (is_wp_error($response)) {
	1620	+/*
	1621	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1622	+ //error_log("Brave Image API request failed: " . $response->get_error_message());
	1623	+ }
	1624	+*/
	1625	+
	1626	+ $this->fallbackResponse = [
	1627	+ 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
	1628	+ 'html' => "",
	1629	+ ];
	1630	+ return;
	1631	+ }
	1632	+
	1633	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	1634	+ set_transient($transient_key, $body, HOUR_IN_SECONDS);
	1635	+ }
	1636	+
	1637	+ // Process the API response
	1638	+ if (isset($body['results']) && is_array($body['results']) && count($body['results']) > 0) {
	1639	+ $html_output = '<div class="mxchat-image-gallery">';
	1640	+
	1641	+ foreach ($body['results'] as $image) {
	1642	+ $image_url = isset($image['url']) ? esc_url($image['url']) : '';
	1643	+ $thumbnail_url = isset($image['thumbnail']['src']) ? esc_url($image['thumbnail']['src']) : '';
	1644	+ $title = isset($image['title']) ? esc_html($image['title']) : esc_html__('Image', 'mxchat');
	1645	+
	1646	+ if ($image_url && $thumbnail_url) {
	1647	+ $html_output .= '<div class="mxchat-image-item">';
	1648	+ $html_output .= '<strong class="mxchat-image-title">' . $title . '</strong>';
	1649	+ $html_output .= '<a href="' . $image_url . '" target="_blank" rel="noopener noreferrer" class="mxchat-image-link">';
	1650	+ $html_output .= '<img src="' . $thumbnail_url . '" alt="' . $title . '" class="mxchat-image-thumbnail">';
	1651	+ $html_output .= '</a></div>';
	1652	+ }
	1653	+ }
	1654	+
	1655	+ $html_output .= '</div>';
	1656	+
	1657	+ $this->fallbackResponse = [
	1658	+ 'text' => "",
	1659	+ 'html' => $html_output,
	1660	+ ];
	1661	+
	1662	+ // Save response in chat history
	1663	+ $this->mxchat_save_chat_message($session_id, 'bot', $html_output);
	1664	+
	1665	+ } else {
	1666	+/*
	1667	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1668	+ //error_log("Brave Image API response did not contain expected data structure or was empty: " . print_r($body, true));
	1669	+ }
	1670	+*/
	1671	+
	1672	+ $this->fallbackResponse = [
	1673	+ 'text' => __("I'm sorry, I couldn't retrieve any images based on your request.", 'mxchat'),
	1674	+ 'html' => "",
	1675	+ ];
	1676	+ }
	1677	+}
	1678	+public function mxchat_interpret_search_query($user_query) {
	1679	+ $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');
	1680	+
	1681	+ // Retrieve OpenAI API key using 'api_key' as the option key
	1682	+ $api_key = isset($this->options['api_key']) ? sanitize_text_field($this->options['api_key']) : sanitize_text_field(get_option('mxchat_options')['api_key']);
	1683	+
	1684	+ /*
	1685	+ // Log the API key check, without exposing the key
	1686	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1687	+ //error_log("Retrieved OpenAI API Key: " . ($api_key ? "Present" : "Missing"));
	1688	+ }
	1689	+ */
	1690	+
	1691	+ if (empty($api_key)) {
	1692	+ //error_log("OpenAI API key is missing.");
	1693	+ return sanitize_text_field($user_query); // Default to the original query if API key is missing
	1694	+ }
	1695	+
	1696	+ $url = 'https://api.openai.com/v1/chat/completions';
	1697	+ $args = [
	1698	+ 'headers' => [
	1699	+ 'Authorization' => 'Bearer ' . $api_key,
	1700	+ 'Content-Type' => 'application/json',
	1701	+ ],
	1702	+ 'body' => wp_json_encode([
	1703	+ 'model' => 'gpt-3.5-turbo',
	1704	+ 'messages' => [
	1705	+ ['role' => 'system', 'content' => $system_prompt],
	1706	+ ['role' => 'user', 'content' => sanitize_text_field($user_query)],
	1707	+ ],
	1708	+ 'temperature' => 0.2,
	1709	+ 'max_tokens' => 20,
	1710	+ ]),
	1711	+ 'method' => 'POST',
	1712	+ ];
	1713	+
	1714	+ $response = wp_remote_post($url, $args);
	1715	+
	1716	+ if (is_wp_error($response)) {
	1717	+ //error_log("OpenAI request failed: " . $response->get_error_message());
	1718	+ return sanitize_text_field($user_query); // Fallback to the original query if there's an error
	1719	+ }
	1720	+
	1721	+ $body = json_decode(wp_remote_retrieve_body($response), true);
	1722	+
	1723	+ // Check for a valid response and sanitize output
	1724	+ if (isset($body['choices'][0]['message']['content'])) {
	1725	+ $interpreted_query = sanitize_text_field(trim($body['choices'][0]['message']['content']));
	1726	+
	1727	+ /*
	1728	+ // Log the interpreted query for debugging
	1729	+ if (defined('WP_DEBUG') && WP_DEBUG) {
	1730	+ //error_log("Interpreted search query: " . $interpreted_query);
	1731	+ }
	1732	+ */
	1733	+
	1734	+ return $interpreted_query;
	1735	+ } else {
	1736	+ //error_log("Unexpected API response format: " . print_r($body, true));
	1737	+ return sanitize_text_field($user_query);
	1738	+ }
	1739	+}
	1740	+
	1741	+
	1742	+
	1743	+private function find_product_in_message($message) {
	1744	+ global $wpdb;
	1745	+
	1746	+ // Get embedding for the search query
	1747	+ $query_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']);
	1748	+
	1749	+ // Check if embedding generation returned an error
	1750	+ if (is_array($query_embedding) && isset($query_embedding['error'])) {
	1751	+ $error_message = $query_embedding['error'];
	1752	+ $error_code = $query_embedding['error_code'] ?? 'embedding_error';
	1753	+
	1754	+ //error_log("Product search embedding error: $error_message (Code: $error_code)");
	1755	+
	1756	+ // Set a user-friendly fallback response
	1757	+ $this->fallbackResponse['text'] = esc_html__("I'm having trouble processing your product search. Please try again later or contact support if this persists.", 'mxchat');
	1758	+
	1759	+ // Also store the technical error for admin users
	1760	+ $this->fallbackResponse['admin_error'] = $error_message;
	1761	+ $this->fallbackResponse['error_code'] = $error_code;
	1762	+
	1763	+ return null;
	1764	+ }
	1765	+
	1766	+ // Check if embedding is valid
	1767	+ if (!is_array($query_embedding) || empty($query_embedding)) {
	1768	+ //error_log("Failed to generate embedding for product search");
	1769	+ $this->fallbackResponse['text'] = esc_html__("I couldn't process your product search. Please try again with different wording.", 'mxchat');
	1770	+ return null;
	1771	+ }
	1772	+
	1773	+ // Get relevant content as string
	1774	+ $relevant_content = $this->mxchat_find_relevant_products($query_embedding);
	1775	+ if (empty($relevant_content)) {
	1776	+ // Return null to indicate no results and set fallback response
	1777	+ $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');
	1778	+ return null;
	1779	+ }
	1780	+
	1781	+
	1782	+ // Extract product URLs from the content
	1783	+ preg_match_all('/https?:\/\/[^\s<>"\']+?\/product\/[^\s<>"\']+/', $relevant_content, $matches);
	1784	+
	1785	+ if (!empty($matches[0])) {
	1786	+ // Try each URL found
	1787	+ foreach ($matches[0] as $url) {
	1788	+ // Clean the URL
	1789	+ $url = rtrim($url, '/."\']');
	1790	+
	1791	+ // Get the product slug
	1792	+ $path = parse_url($url, PHP_URL_PATH);
	1793	+ $slug = basename(rtrim($path, '/'));
	1794	+
	1795	+ // Find product by slug
	1796	+ $args = array(
	1797	+ 'post_type' => 'product',
	1798	+ 'post_status' => 'publish',
	1799	+ 'name' => $slug,
	1800	+ 'posts_per_page' => 1
	1801	+ );
	1802	+
	1803	+ $products = get_posts($args);
	1804	+
	1805	+ if (!empty($products)) {
	1806	+ $product_id = $products[0]->ID;
	1807	+ $product = wc_get_product($product_id);
	1808	+
	1809	+ if ($product && $product->is_purchasable()) {
	1810	+ return $product_id;
	1811	+ }
	1812	+ }
	1813	+ }
	1814	+ }
	1815	+
	1816	+ // Fallback: Look for product names in the content
	1817	+ $products = wc_get_products([
	1818	+ 'status' => 'publish',
	1819	+ 'limit' => -1,
	1820	+ 'return' => 'all'
	1821	+ ]);
	1822	+
	1823	+ foreach ($products as $product) {
	1824	+ $name = $product->get_name();
	1825	+ if (stripos($relevant_content, $name) !== false) {
	1826	+ if ($product->is_purchasable()) {
	1827	+ return $product->get_id();
	1828	+ }
	1829	+ }
	1830	+ }
	1831	+
	1832	+ // If no product is found after all checks, set the fallback response
	1833	+ $this->fallbackResponse['text'] = esc_html__("I couldn't find any relevant products based on your query. Try to be more specific", 'mxchat');
	1834	+ return null;
	1835	+}
	1836	+
	1837	+// New method to handle intent responses
	1838	+private function generate_intent_response($context_content, $session_id) {
	1839	+ // Convert the context array to a structured string for the AI
	1840	+ $context_string = $this->format_intent_context($context_content);
	1841	+ // Generate AI response using the context
	1842	+ $response = $this->mxchat_generate_response(
	1843	+ $context_string,
	1844	+ $this->options['api_key'],
	1845	+ $this->options['xai_api_key'],
	1846	+ $this->options['claude_api_key'],
	1847	+ $this->options['deepseek_api_key'],
	1848	+ $this->options['gemini_api_key'], // Added Gemini API key
	1849	+ $this->mxchat_fetch_conversation_history_for_ai($session_id)
	1850	+ );
	1851	+ $this->fallbackResponse['text'] = $response;
	1852	+ return true;
	1853	+}
	1854	+
	1855	+// Helper method to format intent context
	1856	+private function format_intent_context($context) {
	1857	+ $context_string = esc_html__("INTENT CONTEXT:\n", 'mxchat');
	1858	+
	1859	+ switch ($context['intent']) {
	1860	+ case 'add_to_cart':
	1861	+ if ($context['status'] === 'success') {
	1862	+ $context_string .= esc_html__("Action: Successfully added product to cart\n", 'mxchat');
	1863	+ $context_string .= sprintf(esc_html__("Product: %s\n", 'mxchat'), $context['product']['name']);
	1864	+ $context_string .= esc_html__("Available actions: ", 'mxchat') . implode(', ', $context['available_actions']) . "\n";
	1865	+ $context_string .= sprintf(esc_html__("Cart URL: %s\n", 'mxchat'), $context['cart_url']);
	1866	+ $context_string .= esc_html__("\nPlease inform the user of the successful addition and their available options.", 'mxchat');
	1867	+ } else {
	1868	+ $context_string .= esc_html__("Action: Failed to add product to cart\n", 'mxchat');
	1869	+ $context_string .= sprintf(esc_html__("Reason: %s\n", 'mxchat'), $context['reason']);
	1870	+ switch ($context['reason']) {
	1871	+ case 'woocommerce_not_available':
	1872	+ $context_string .= esc_html__("\nPlease inform the user that shopping features are not available.", 'mxchat');
	1873	+ break;
	1874	+ case 'no_product_context':
	1875	+ $context_string .= esc_html__("\nPlease ask the user to specify which product they want to add.", 'mxchat');
	1876	+ break;
	1877	+ case 'product_not_found':
	1878	+ $context_string .= esc_html__("\nPlease inform the user that the product couldn't be found and ask them to try again.", 'mxchat');
	1879	+ break;
	1880	+ case 'add_to_cart_failed':
	1881	+ $context_string .= esc_html__("\nPlease apologize to the user and suggest they try again or ask for assistance.", 'mxchat');
	1882	+ break;
	1883	+ }
	1884	+ }
	1885	+ break;
	1886	+ }
	1887	+
	1888	+ return $context_string;
	1889	+}
	1890	+
	1891	+
	1892	+//very good
	1893	+private function add_email_to_loops($email) {
	1894	+ // Sanitize the email
	1895	+ $email = sanitize_email($email);
	1896	+
	1897	+ // Retrieve and sanitize options
	1898	+ $api_key = isset($this->options['loops_api_key']) ? sanitize_text_field($this->options['loops_api_key']) : '';
	1899	+ $mailing_list_id = isset($this->options['loops_mailing_list']) ? sanitize_text_field($this->options['loops_mailing_list']) : '';
	1900	+
	1901	+ // Check for missing API key or mailing list ID
	1902	+ if (empty($api_key) || empty($mailing_list_id)) {
	1903	+ //error_log(esc_html__('Loops API key or mailing list ID is missing.', 'mxchat'));
	1904	+ return;
	1905	+ }
	1906	+
	1907	+ $data = array(
	1908	+ 'email' => $email,
	1909	+ 'subscribed' => true,
	1910	+ 'source' => __('MxChat AI Chatbot', 'mxchat'),
	1911	+ 'mailingLists' => array($mailing_list_id => true),
	1912	+ );
	1913	+
	1914	+ $url = 'https://app.loops.so/api/v1/contacts/create';
	1915	+ $args = array(
	1916	+ 'body' => wp_json_encode($data),
	1917	+ 'headers' => array(
	1918	+ 'Authorization' => 'Bearer ' . $api_key,
	1919	+ 'Content-Type' => 'application/json',
	1920	+ ),
	1921	+ 'method' => 'POST',
	1922	+ 'timeout' => 45,
	1923	+ );
	1924	+
	1925	+ $response = wp_remote_post($url, $args);
	1926	+
	1927	+ // Handle errors in the API request
	1928	+ if (is_wp_error($response)) {
	1929	+ //error_log(esc_html__('Error adding email to Loops: ', 'mxchat') . $response->get_error_message());
	1930	+ return;
	1931	+ }
	1932	+
	1933	+ // Check for non-200 HTTP responses
	1934	+ $response_code = wp_remote_retrieve_response_code($response);
	1935	+ if ($response_code != 200) {
	1936	+ $response_body = wp_remote_retrieve_body($response);
	1937	+ //error_log(esc_html__('Loops API responded with code ', 'mxchat') . $response_code . ': ' . $response_body);
	1938	+ }
	1939	+}
	1940	+
	1941	+public function mxchat_handle_pdf_discussion($message, $user_id, $session_id) {
	1942	+ // Get the maximum number of pages allowed from admin settings
	1943	+ $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
	1944	+
	1945	+ // Retrieve options for dynamic texts
	1946	+ $trigger_text = $this->options['pdf_intent_trigger_text'] ?? __("Please provide the URL to the PDF you'd like to discuss.", 'mxchat');
	1947	+ $success_text = $this->options['pdf_intent_success_text'] ?? __("I've processed the PDF. What questions do you have about it?", 'mxchat');
	1948	+ $error_text = $this->options['pdf_intent_error_text'] ?? __("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');
	1949	+
	1950	+ // Check for explicit request for new PDF
	1951	+ $new_pdf_requested = stripos($message, 'new') !== false ||
	1952	+ stripos($message, 'another') !== false ||
	1953	+ stripos($message, 'different') !== false;
	1954	+
	1955	+ // If user mentions adding/reading a PDF, set waiting flag
	1956	+ if (stripos($message, 'pdf') !== false ||
	1957	+ stripos($message, 'document') !== false ||
	1958	+ stripos($message, 'read') !== false) {
	1959	+ set_transient('mxchat_waiting_for_pdf_url_' . $session_id, true, HOUR_IN_SECONDS);
	1960	+ $this->fallbackResponse['text'] = $trigger_text;
	1961	+ return;
	1962	+ }
	1963	+
	1964	+ // If we're waiting for a URL or user requested new PDF
	1965	+ if ($new_pdf_requested || get_transient('mxchat_waiting_for_pdf_url_' . $session_id)) {
	1966	+ if (preg_match('/https?:\/\/[^\s"]+/i', $message, $matches)) {
	1967	+ // Process URL... (rest of your existing URL processing code)
	1968	+ } else {
	1969	+ $this->fallbackResponse['text'] = $trigger_text;
	1970	+ }
	1971	+ return;
	1972	+ }
	1973	+
	1974	+ // Default to proceeding with conversation if no specific PDF action is needed
	1975	+ $this->fallbackResponse['text'] = '';
	1976	+}
	1977	+
	1978	+
	1979	+private function fetch_and_split_pdf_pages($pdf_source, $max_pages) {
	1980	+ $upload_dir = wp_upload_dir();
	1981	+ $temp_file = null;
	1982	+
	1983	+ try {
	1984	+ // Handle URL vs local file
	1985	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
	1986	+ // Validate and download the file from URL
	1987	+ $temp_file = wp_tempnam($pdf_source); // Safe temporary file name
	1988	+ $response = wp_remote_get($pdf_source, ['timeout' => 60]);
	1989	+
	1990	+ if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
	1991	+ //error_log(esc_html__("Failed to download PDF. Error: ", 'mxchat') . print_r($response, true));
	1992	+ return false;
	1993	+ }
	1994	+
	1995	+ file_put_contents($temp_file, wp_remote_retrieve_body($response));
	1996	+
	1997	+ // Validate that the downloaded file is a PDF
	1998	+ $mime_type = mime_content_type($temp_file);
	1999	+ if ($mime_type !== 'application/pdf') {
	2000	+ //error_log(esc_html__("Invalid MIME type detected for PDF: ", 'mxchat') . $mime_type);
	2001	+ unlink($temp_file);
	2002	+ return false;
	2003	+ }
	2004	+ } else {
	2005	+ // For local files, use the provided path directly
	2006	+ $temp_file = $pdf_source;
	2007	+ }
	2008	+
	2009	+ // Parse and process the PDF
	2010	+ $parser = new \Smalot\PdfParser\Parser();
	2011	+ $pdf = $parser->parseFile($temp_file);
	2012	+ $pages = $pdf->getPages();
	2013	+
	2014	+ if (count($pages) > $max_pages) {
	2015	+ //error_log(esc_html__("PDF exceeds the maximum allowed pages: ", 'mxchat') . count($pages));
	2016	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL)) {
	2017	+ unlink($temp_file);
	2018	+ }
	2019	+ return esc_html__('too_many_pages', 'mxchat');
	2020	+ }
	2021	+
	2022	+ $embeddings = [];
	2023	+ foreach ($pages as $page_number => $page) {
	2024	+ $text = $page->getText();
	2025	+
	2026	+ // Ensure text is non-empty before generating embeddings
	2027	+ if (empty(trim($text))) {
	2028	+ //error_log(esc_html__("Skipping empty page: ", 'mxchat') . ($page_number + 1));
	2029	+ continue;
	2030	+ }
	2031	+
	2032	+ $embedding = $this->mxchat_generate_embedding(
	2033	+ esc_html__("Page ", 'mxchat') . ($page_number + 1) . ": " . $text,
	2034	+ $this->options['api_key']
	2035	+ );
	2036	+
	2037	+ if ($embedding) {
	2038	+ $embeddings[] = [
	2039	+ 'page_number' => $page_number + 1,
	2040	+ 'embedding' => $embedding,
	2041	+ 'text' => $text,
	2042	+ ];
	2043	+ } else {
	2044	+ //error_log(esc_html__("Failed to generate embedding for page ", 'mxchat') . ($page_number + 1));
	2045	+ }
	2046	+ }
	2047	+
	2048	+ // Clean up downloaded file if it was from URL
	2049	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file) {
	2050	+ unlink($temp_file);
	2051	+ }
	2052	+
	2053	+ return $embeddings;
	2054	+
	2055	+ } catch (\Exception $e) {
	2056	+ // //error_log(esc_html__("Error parsing or processing PDF: ", 'mxchat') . $e->getMessage());
	2057	+
	2058	+ // Cleanup in case of exception
	2059	+ if (filter_var($pdf_source, FILTER_VALIDATE_URL) && $temp_file && file_exists($temp_file)) {
	2060	+ unlink($temp_file);
	2061	+ }
	2062	+
	2063	+ return false;
	2064	+ }
	2065	+}
	2066	+private function find_relevant_pdf_pages($query_embedding, $embeddings) {
	2067	+ //error_log(esc_html__("find_relevant_pdf_pages called.", 'mxchat'));
	2068	+
	2069	+ $most_relevant = null;
	2070	+ $highest_similarity = -INF;
	2071	+
	2072	+ foreach ($embeddings as $page_data) {
	2073	+ $similarity = $this->mxchat_calculate_cosine_similarity($query_embedding, $page_data['embedding']);
	2074	+
	2075	+ if ($similarity > $highest_similarity) {
	2076	+ $highest_similarity = $similarity;
	2077	+ $most_relevant = $page_data['page_number'];
	2078	+ }
	2079	+ }
	2080	+
	2081	+ if (!is_null($most_relevant)) {
	2082	+ $page_numbers = range(max(1, $most_relevant - 1), min(count($embeddings), $most_relevant + 1));
	2083	+ return array_filter($embeddings, function ($page) use ($page_numbers) {
	2084	+ return in_array($page['page_number'], $page_numbers);
	2085	+ });
	2086	+ }
	2087	+
	2088	+ return [];
	2089	+}
	2090	+// Add this to your class
	2091	+public function handle_pdf_upload() {
	2092	+ check_ajax_referer('mxchat_chat_nonce', 'nonce');
	2093	+
	2094	+ if (!isset($_FILES['pdf_file']) || !isset($_POST['session_id'])) {
	2095	+ wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat'));
	2096	+ return;
	2097	+ }
	2098	+
	2099	+ $file = $_FILES['pdf_file'];
	2100	+ $session_id = sanitize_text_field($_POST['session_id']);
	2101	+ $original_filename = sanitize_text_field($file['name']);
	2102	+
	2103	+ $file_type = wp_check_filetype($file['name'], ['pdf' => 'application/pdf']);
	2104	+ if ($file_type['type'] !== 'application/pdf') {
	2105	+ wp_send_json_error(esc_html__('Invalid file type. Only PDF files are allowed.', 'mxchat'));
	2106	+ return;
	2107	+ }
	2108	+
	2109	+ $upload_dir = wp_upload_dir();
	2110	+ $pdf_filename = 'mxchat_' . $session_id . '_' . time() . '.pdf';
	2111	+ $pdf_path = $upload_dir['path'] . '/' . $pdf_filename;
	2112	+
	2113	+ if (!move_uploaded_file($file['tmp_name'], $pdf_path)) {
	2114	+ wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat'));
	2115	+ return;
	2116	+ }
	2117	+
	2118	+ $this->clear_pdf_transients($session_id);
	2119	+
	2120	+ $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;
	2121	+ $embeddings = $this->fetch_and_split_pdf_pages($pdf_path, $max_pages);
	2122	+
	2123	+ if ($embeddings === 'too_many_pages') {
	2124	+ unlink($pdf_path);
	2125	+ $error_message = sprintf(
	2126	+ $this->options['pdf_intent_error_text'] ??
	2127	+ esc_html__("The provided PDF exceeds the maximum allowed limit of %d pages. Please provide a smaller document.", 'mxchat'),
	2128	+ $max_pages
	2129	+ );
	2130	+ wp_send_json_error($error_message);
	2131	+ return;
	2132	+ }
	2133	+
	2134	+ if ($embeddings === false || empty($embeddings)) {
	2135	+ unlink($pdf_path);
	2136	+ $error_message = $this->options['pdf_intent_error_text'] ??
	2137	+ esc_html__('The uploaded PDF appears to be empty or contains unsupported content.', 'mxchat');
	2138	+ wp_send_json_error($error_message);
	2139	+ return;
	2140	+ }
	2141	+
	2142	+ if (!empty($embeddings)) {
	2143	+ set_transient('mxchat_pdf_url_' . $session_id, $pdf_path, HOUR_IN_SECONDS);
	2144	+ set_transient('mxchat_pdf_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS);
	2145	+ set_transient('mxchat_pdf_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS);
	2146	+ set_transient('mxchat_include_pdf_in_context_' . $session_id, true, HOUR_IN_SECONDS);
	2147	+
	2148	+ $success_message = $this->options['pdf_intent_success_text'] ??
	2149	+ esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat');
	2150	+
	2151	+ wp_send_json_success([
	2152	+ 'message' => $success_message,
	2153	+ 'filename' => $original_filename
	2154	+ ]);
	2155	+ return;
	2156	+ }
	2157	+
	2158	+ unlink($pdf_path);
	2159	+ $error_message = $this->options['pdf_intent_error_text'] ??
	2160	+ esc_html__('Sorry, I couldn\'t process the PDF. Please ensure it\'s a valid file.', 'mxchat');
	2161	+ wp_send_json_error($error_message);
	2162	+ return;
	2163	+}
	2164	+public function handle_pdf_remove() {
	2165	+ check_ajax_referer('mxchat_chat_nonce', 'nonce');
	2166	+
	2167	+ if (empty($_POST['session_id'])) {
	2168	+ wp_send_json_error(esc_html__('Session ID missing.', 'mxchat'));
	2169	+ wp_die();
	2170	+ }
	2171	+
	2172	+ $session_id = sanitize_text_field($_POST['session_id']);
	2173	+ $pdf_path = get_transient('mxchat_pdf_url_' . $session_id);
	2174	+
	2175	+ if ($pdf_path && file_exists($pdf_path)) {
	2176	+ unlink($pdf_path);
	2177	+ }
	2178	+
	2179	+ $this->clear_pdf_transients($session_id);
	2180	+
	2181	+ wp_send_json_success([
	2182	+ 'message' => esc_html__('PDF removed successfully.', 'mxchat')
	2183	+ ]);
	2184	+ wp_die();
	2185	+}
	2186	+
	2187	+
	2188	+
	2189	+
	2190	+function mxchat_fetch_new_messages() {
	2191	+ $session_id = sanitize_text_field($_POST['session_id']);
	2192	+ $last_seen_id = sanitize_text_field($_POST['last_seen_id']);
	2193	+ $persistence_enabled = $_POST['persistence_enabled'] === 'true';
	2194	+ $initial_timestamp = isset($_POST['initial_timestamp']) ? intval($_POST['initial_timestamp']) : 0;
	2195	+
	2196	+ if (empty($session_id)) {
	2197	+ //error_log(esc_html__('Fetch new messages error: Session ID missing.', 'mxchat'));
	2198	+ wp_send_json_error(['message' => esc_html__('Session ID missing.', 'mxchat')]);
	2199	+ wp_die();
	2200	+ }
	2201	+
	2202	+ $history = get_option("mxchat_history_{$session_id}", []);
	2203	+
	2204	+ $new_messages = array_filter($history, function ($message) use ($last_seen_id, $persistence_enabled, $initial_timestamp) {
	2205	+ // If persistence is enabled, show all new messages
	2206	+ if ($persistence_enabled) {
	2207	+ return !empty($message['id']) &&
	2208	+ strcmp($message['id'], $last_seen_id) > 0 &&
	2209	+ $message['role'] === 'agent';
	2210	+ }
	2211	+
	2212	+ // If persistence is disabled, only show messages after initial timestamp
	2213	+ return !empty($message['id']) &&
	2214	+ $message['role'] === 'agent' &&
	2215	+ $message['timestamp'] > $initial_timestamp;
	2216	+ });
	2217	+
	2218	+ //error_log(esc_html__("New agent messages fetched for session $session_id. Last seen ID: $last_seen_id", 'mxchat'));
	2219	+
	2220	+ wp_send_json_success([
	2221	+ 'new_messages' => array_values($new_messages)
	2222	+ ]);
	2223	+ wp_die();
	2224	+}
	2225	+
	2226	+
	2227	+public function mxchat_live_agent_handover($message, $user_id, $session_id) {
	2228	+ // First check if live agents are available
	2229	+ $live_agent_available = $this->options['live_agent_status'] ?? 'off';
	2230	+ if ($live_agent_available !== 'on') {
	2231	+ $away_message = $this->options['live_agent_away_message'] ?? 'Sorry, live agents are currently unavailable. I can continue helping you as an AI assistant.';
	2232	+ $this->fallbackResponse = [
	2233	+ 'text' => $away_message,
	2234	+ 'html' => '',
	2235	+ 'images' => [],
	2236	+ 'chat_mode' => 'ai'
	2237	+ ];
	2238	+ wp_send_json([
	2239	+ 'text' => $away_message,
	2240	+ 'html' => '',
	2241	+ 'chat_mode' => 'ai',
	2242	+ 'session_id' => $session_id
	2243	+ ]);
	2244	+ wp_die();
	2245	+ }
	2246	+
	2247	+ $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
	2248	+ if (empty($slack_webhook_url)) {
	2249	+ return false;
	2250	+ }
	2251	+
	2252	+ // Get recent chat history (last 5 messages)
	2253	+ $history = get_option("mxchat_history_{$session_id}", []);
	2254	+ $recent_history = array_slice($history, -5); // Get last 5 messages
	2255	+
	2256	+ // Format conversation history
	2257	+ $conversation_context = "";
	2258	+ if (!empty($recent_history)) {
	2259	+ $conversation_context = "*Recent Conversation:*\n";
	2260	+ foreach ($recent_history as $hist_message) {
	2261	+ $role_display = $hist_message['role'] === 'user' ? 'User' : 'AI';
	2262	+ $conversation_context .= ">{$role_display}: {$hist_message['content']}\n";
	2263	+ }
	2264	+ $conversation_context .= "\n";
	2265	+ }
	2266	+
	2267	+ update_option("mxchat_mode_{$session_id}", 'agent');
	2268	+
	2269	+ $webhook_data = [
	2270	+ 'blocks' => [
	2271	+ [
	2272	+ 'type' => 'header',
	2273	+ 'text' => [
	2274	+ 'type' => 'plain_text',
	2275	+ 'text' => '🔔 New Live Agent Request',
	2276	+ 'emoji' => true
	2277	+ ]
	2278	+ ],
	2279	+ [
	2280	+ 'type' => 'section',
	2281	+ 'fields' => [
	2282	+ [
	2283	+ 'type' => 'mrkdwn',
	2284	+ 'text' => sprintf('*User ID:*\n`%s`', $user_id)
	2285	+ ],
	2286	+ [
	2287	+ 'type' => 'mrkdwn',
	2288	+ 'text' => sprintf('*Session ID:*\n`%s`', $session_id)
	2289	+ ]
	2290	+ ]
	2291	+ ]
	2292	+ ]
	2293	+ ];
	2294	+
	2295	+ // Add conversation history if exists
	2296	+ if (!empty($conversation_context)) {
	2297	+ $webhook_data['blocks'][] = [
	2298	+ 'type' => 'section',
	2299	+ 'text' => [
	2300	+ 'type' => 'mrkdwn',
	2301	+ 'text' => $conversation_context
	2302	+ ]
	2303	+ ];
	2304	+ }
	2305	+
	2306	+ // Add the current message
	2307	+ $webhook_data['blocks'][] = [
	2308	+ 'type' => 'section',
	2309	+ 'text' => [
	2310	+ 'type' => 'mrkdwn',
	2311	+ 'text' => sprintf('*Current Message:*\n%s', $message)
	2312	+ ]
	2313	+ ];
	2314	+
	2315	+ // Add the reply button
	2316	+ $webhook_data['blocks'][] = [
	2317	+ 'type' => 'actions',
	2318	+ 'elements' => [
	2319	+ [
	2320	+ 'type' => 'button',
	2321	+ 'text' => [
	2322	+ 'type' => 'plain_text',
	2323	+ 'text' => '✍️ Reply',
	2324	+ 'emoji' => true
	2325	+ ],
	2326	+ 'value' => $session_id,
	2327	+ 'action_id' => 'reply_to_user',
	2328	+ 'style' => 'primary'
	2329	+ ]
	2330	+ ]
	2331	+ ];
	2332	+
	2333	+ $response = wp_remote_post($slack_webhook_url, [
	2334	+ 'body' => json_encode($webhook_data),
	2335	+ 'headers' => [
	2336	+ 'Content-Type' => 'application/json',
	2337	+ ],
	2338	+ ]);
	2339	+
	2340	+ if (is_wp_error($response)) {
	2341	+ return false;
	2342	+ }
	2343	+
	2344	+ $success_message = $this->options['live_agent_notification_message'] ?? 'Live agent has been notified.';
	2345	+ $this->mxchat_save_chat_message($session_id, 'bot', $success_message);
	2346	+
	2347	+ $this->fallbackResponse = [
	2348	+ 'text' => $success_message,
	2349	+ 'html' => '',
	2350	+ 'images' => [],
	2351	+ 'chat_mode' => 'agent'
	2352	+ ];
	2353	+
	2354	+ wp_send_json([
	2355	+ 'success' => true,
	2356	+ 'text' => $success_message,
	2357	+ 'html' => '',
	2358	+ 'chat_mode' => 'agent',
	2359	+ 'session_id' => $session_id,
	2360	+ 'fallbackResponse' => $this->fallbackResponse
	2361	+ ]);
	2362	+ wp_die();
	2363	+}
	2364	+public function mxchat_send_user_message_to_agent($message, $user_id, $session_id) {
	2365	+ $slack_webhook_url = $this->options['live_agent_webhook_url'] ?? '';
	2366	+
	2367	+ if (empty($slack_webhook_url)) {
	2368	+ //error_log(esc_html__('Slack Webhook URL is not configured.', 'mxchat'));
	2369	+ return false;
	2370	+ }
	2371	+
	2372	+ $webhook_data = [
	2373	+ 'blocks' => [
	2374	+ [
	2375	+ 'type' => 'header',
	2376	+ 'text' => [
	2377	+ 'type' => 'plain_text',
	2378	+ 'text' => esc_html__('📩 New Chat Message', 'mxchat'),
	2379	+ 'emoji' => true
	2380	+ ]
	2381	+ ],
	2382	+ [
	2383	+ 'type' => 'section',
	2384	+ 'fields' => [
	2385	+ [
	2386	+ 'type' => 'mrkdwn',
	2387	+ 'text' => sprintf(esc_html__('*User ID:*\n`%s`', 'mxchat'), $user_id)
	2388	+ ],
	2389	+ [
	2390	+ 'type' => 'mrkdwn',
	2391	+ 'text' => sprintf(esc_html__('*Session ID:*\n`%s`', 'mxchat'), $session_id)
	2392	+ ]
	2393	+ ]
	2394	+ ],
	2395	+ [
	2396	+ 'type' => 'section',
	2397	+ 'text' => [
	2398	+ 'type' => 'mrkdwn',
	2399	+ 'text' => sprintf(esc_html__('*Message:*\n%s', 'mxchat'), $message)
	2400	+ ]
	2401	+ ],
	2402	+ [
	2403	+ 'type' => 'actions',
	2404	+ 'elements' => [
	2405	+ [
	2406	+ 'type' => 'button',
	2407	+ 'text' => [
	2408	+ 'type' => 'plain_text',
	2409	+ 'text' => esc_html__('✍️ Reply', 'mxchat'),
	2410	+ 'emoji' => true
	2411	+ ],
	2412	+ 'value' => $session_id,
	2413	+ 'action_id' => 'reply_to_user',
	2414	+ 'style' => 'primary'
	2415	+ ]
	2416	+ ]
	2417	+ ]
	2418	+ ]
	2419	+ ];
	2420	+
	2421	+ $response = wp_remote_post($slack_webhook_url, [
	2422	+ 'body' => json_encode($webhook_data),
	2423	+ 'headers' => [
	2424	+ 'Content-Type' => 'application/json',
	2425	+ ],
	2426	+ ]);
	2427	+
	2428	+ if (is_wp_error($response)) {
	2429	+ //error_log(esc_html__('Error sending message to Slack: ', 'mxchat') . $response->get_error_message());
	2430	+ return false;
	2431	+ }
	2432	+
	2433	+ //error_log(esc_html__('Message sent to Slack successfully.', 'mxchat'));
	2434	+ return true;
	2435	+}
	2436	+public function handle_slack_interaction(WP_REST_Request $request) {
	2437	+ //error_log('Received Slack interaction');
	2438	+
	2439	+ $payload = json_decode($request->get_param('payload'), true);
	2440	+ //error_log('Payload: ' . print_r($payload, true));
	2441	+
	2442	+ // Handle button click
	2443	+ if ($payload['type'] === 'block_actions' && $payload['actions'][0]['action_id'] === 'reply_to_user') {
	2444	+ $session_id = $payload['actions'][0]['value'];
	2445	+ $trigger_id = $payload['trigger_id'];
	2446	+
	2447	+ // Get Bot Token from settings
	2448	+ $slack_token = $this->options['live_agent_bot_token'] ?? '';
	2449	+
	2450	+ if (empty($slack_token)) {
	2451	+ //error_log('Slack Bot Token not configured');
	2452	+ return new WP_REST_Response(['error' => esc_html__('Bot token not configured', 'mxchat')], 400);
	2453	+ }
	2454	+ $response = wp_remote_post('https://slack.com/api/views.open', [
	2455	+ 'headers' => [
	2456	+ 'Content-Type' => 'application/json',
	2457	+ 'Authorization' => 'Bearer ' . $slack_token
	2458	+ ],
	2459	+ 'body' => json_encode([
	2460	+ 'trigger_id' => $trigger_id,
	2461	+ 'view' => [
	2462	+ 'type' => 'modal',
	2463	+ 'callback_id' => 'reply_modal',
	2464	+ 'title' => [
	2465	+ 'type' => 'plain_text',
	2466	+ 'text' => __('Reply to User', 'mxchat')
	2467	+ ],
	2468	+ 'submit' => [
	2469	+ 'type' => 'plain_text',
	2470	+ 'text' => __('Send', 'mxchat')
	2471	+ ],
	2472	+ 'close' => [
	2473	+ 'type' => 'plain_text',
	2474	+ 'text' => __('Cancel', 'mxchat')
	2475	+ ],
	2476	+ 'blocks' => [
	2477	+ [
	2478	+ 'type' => 'input',
	2479	+ 'block_id' => 'reply_block',
	2480	+ 'label' => [
	2481	+ 'type' => 'plain_text',
	2482	+ 'text' => sprintf(__('Reply to session: %s', 'mxchat'), $session_id)
	2483	+ ],
	2484	+ 'element' => [
	2485	+ 'type' => 'plain_text_input',
	2486	+ 'action_id' => 'message',
	2487	+ 'multiline' => true,
	2488	+ 'placeholder' => [
	2489	+ 'type' => 'plain_text',
	2490	+ 'text' => __('Type your message here...', 'mxchat')
	2491	+ ]
	2492	+ ]
	2493	+ ]
	2494	+ ],
	2495	+ 'private_metadata' => $session_id
	2496	+ ]
	2497	+ ])
	2498	+ ]);
	2499	+
	2500	+ //error_log('Views.open response: ' . print_r($response, true));
	2501	+
	2502	+ // Return immediate acknowledgment
	2503	+ return new WP_REST_Response(['ok' => true]);
	2504	+ }
	2505	+
	2506	+ // Handle modal submission
	2507	+// Handle modal submission
	2508	+if ($payload['type'] === 'view_submission') {
	2509	+ $session_id = $payload['view']['private_metadata'];
	2510	+ $message = $payload['view']['state']['values']['reply_block']['message']['value'];
	2511	+
	2512	+ // Save the message (keep the message_id but don't include in response)
	2513	+ $this->mxchat_save_chat_message($session_id, 'agent', $message);
	2514	+
	2515	+ // Keep the original response format for Slack
	2516	+ return new WP_REST_Response([
	2517	+ 'response_action' => 'clear'
	2518	+ ]);
	2519	+}
	2520	+
	2521	+ // Default acknowledgment
	2522	+ return new WP_REST_Response(['ok' => true]);
	2523	+}
	2524	+
	2525	+public function mxchat_handle_agent_response(WP_REST_Request $request) {
	2526	+ //error_log('Received agent response request');
	2527	+ //error_log('Request data: ' . print_r($request->get_params(), true));
	2528	+ // //error_log('Raw body: ' . file_get_contents('php://input'));
	2529	+
	2530	+ // Get the data from Slack's slash command format
	2531	+ $command_text = $request->get_param('text');
	2532	+ // //error_log('Command text: ' . $command_text);
	2533	+
	2534	+ if (empty($command_text)) {
	2535	+ //error_log(esc_html__('Agent response error: No command text received', 'mxchat'));
	2536	+ return new WP_REST_Response([
	2537	+ 'error' => esc_html__('Command text is required. Format: /reply session_id message', 'mxchat')
	2538	+ ], 400);
	2539	+ }
	2540	+
	2541	+ // Split the command text into session_id and message
	2542	+ $parts = explode(' ', $command_text, 2);
	2543	+ if (count($parts) !== 2) {
	2544	+ //error_log('Agent response error: Invalid command format');
	2545	+ return new WP_REST_Response([
	2546	+ 'error' => esc_html__('Invalid format. Use: /reply session_id message', 'mxchat')
	2547	+ ], 400);
	2548	+ }
	2549	+
	2550	+ $session_id = sanitize_text_field($parts[0]);
	2551	+ $message = sanitize_text_field($parts[1]);
	2552	+
	2553	+ //error_log("Processing agent response - Session ID: $session_id, Message: $message");
	2554	+
	2555	+ // Save the message
	2556	+ $message_id = $this->mxchat_save_chat_message($session_id, 'agent', $message);
	2557	+
	2558	+ if (!$message_id) {
	2559	+ // //error_log('Failed to save agent message');
	2560	+ return new WP_REST_Response([
	2561	+ 'error' => esc_html__('Failed to save message', 'mxchat')
	2562	+ ], 500);
	2563	+ }
	2564	+
	2565	+ // Return success response in Slack's expected format
	2566	+ return new WP_REST_Response([
	2567	+ 'response_type' => 'in_channel',
	2568	+ 'text' => esc_html__("Message sent successfully to session $session_id", 'mxchat')
	2569	+ ], 200);
	2570	+}
	2571	+
	2572	+
	2573	+public function mxchat_handle_switch_to_chatbot_intent($message, $user_id, $session_id) {
	2574	+ //error_log(esc_html__("Switching back to chatbot mode via intent.", 'mxchat'));
	2575	+
	2576	+ // Just update mode to AI
	2577	+ update_option("mxchat_mode_{$session_id}", 'ai');
	2578	+
	2579	+ // Initialize states
	2580	+ $this->fallbackResponse = ['text' => '', 'html' => '', 'images' => []];
	2581	+ $this->productCardHtml = '';
	2582	+
	2583	+ // Set the response message
	2584	+ $this->fallbackResponse['text'] = esc_html__('You are now chatting with the AI chatbot.', 'mxchat');
	2585	+
	2586	+ return true; // Intent was handled
	2587	+}
	2588	+
	2589	+
	2590	+
	2591	+
	2592	+// For the word upload handler
	2593	+public function mxchat_handle_word_upload() {
	2594	+ // Delegate to word handler
	2595	+ $this->word_handler->mxchat_handle_word_upload();
	2596	+}
	2597	+
	2598	+// For the word removal handler
	2599	+public function mxchat_handle_word_remove() {
	2600	+ // Delegate to word handler
	2601	+ $this->word_handler->mxchat_handle_word_remove();
	2602	+}
	2603	+
	2604	+// For the word status check
	2605	+public function mxchat_check_word_status() {
	2606	+ // Delegate to word handler
	2607	+ $this->word_handler->mxchat_check_word_status();
	2608	+}
	2609	+
	2610	+
	2611	+private function mxchat_get_user_identifier() {
	2612	+ return MxChat_User::mxchat_get_user_identifier();
	2613	+}
	2614	+
	2615	+private function mxchat_generate_embedding($text, $api_key) {
	2616	+ try {
	2617	+ // Get options and selected model
	2618	+ $options = get_option('mxchat_options');
	2619	+ $selected_model = $options['embedding_model'] ?? 'text-embedding-ada-002';
	2620	+
	2621	+ // Determine endpoint and API key based on model
	2622	+ if (strpos($selected_model, 'voyage') === 0) {
	2623	+ $endpoint = 'https://api.voyageai.com/v1/embeddings';
	2624	+ $api_key = $options['voyage_api_key'] ?? '';
	2625	+
	2626	+ // Check if Voyage API key is missing
	2627	+ if (empty($api_key)) {
	2628	+ //error_log('Voyage API key is missing');
	2629	+ return [
	2630	+ 'error' => esc_html__('Voyage AI API key is not configured', 'mxchat'),
	2631	+ 'error_code' => 'missing_voyage_api_key'
	2632	+ ];
	2633	+ }
	2634	+ } else {
	2635	+ $endpoint = 'https://api.openai.com/v1/embeddings';
	2636	+ // Use the passed API key for OpenAI
	2637	+
	2638	+ // Check if OpenAI API key is missing
	2639	+ if (empty($api_key)) {
	2640	+ //error_log('OpenAI API key is missing');
	2641	+ return [
	2642	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	2643	+ 'error_code' => 'missing_openai_api_key'
	2644	+ ];
	2645	+ }
	2646	+ }
	2647	+
	2648	+ // Check if text is empty
	2649	+ if (empty($text)) {
	2650	+ //error_log('Empty text provided for embedding generation');
	2651	+ return [
	2652	+ 'error' => esc_html__('No text provided for embedding generation', 'mxchat'),
	2653	+ 'error_code' => 'empty_embedding_text'
	2654	+ ];
	2655	+ }
	2656	+
	2657	+ // Prepare request body with conditional output_dimension
	2658	+ $request_body = [
	2659	+ 'input' => $text,
	2660	+ 'model' => $selected_model
	2661	+ ];
	2662	+
	2663	+ // Add output_dimension for voyage-3-large
	2664	+ if ($selected_model === 'voyage-3-large') {
	2665	+ $request_body['output_dimension'] = 2048;
	2666	+ }
	2667	+
	2668	+ // Prepare request arguments
	2669	+ $args = [
	2670	+ 'body' => wp_json_encode($request_body),
	2671	+ 'headers' => [
	2672	+ 'Content-Type' => 'application/json',
	2673	+ 'Authorization' => 'Bearer ' . $api_key,
	2674	+ ],
	2675	+ 'timeout' => 60,
	2676	+ 'redirection' => 5,
	2677	+ 'blocking' => true,
	2678	+ 'httpversion' => '1.0',
	2679	+ 'sslverify' => true,
	2680	+ ];
	2681	+
	2682	+ // Make the request
	2683	+ $response = wp_remote_post($endpoint, $args);
	2684	+
	2685	+ // Handle WordPress errors
	2686	+ if (is_wp_error($response)) {
	2687	+ $error_message = $response->get_error_message();
	2688	+ //error_log('Embedding Generation Error: ' . $error_message);
	2689	+ return [
	2690	+ 'error' => esc_html__('Connection error when generating embeddings: ', 'mxchat') . esc_html($error_message),
	2691	+ 'error_code' => 'embedding_connection_error'
	2692	+ ];
	2693	+ }
	2694	+
	2695	+ // Check HTTP status code
	2696	+ $status_code = wp_remote_retrieve_response_code($response);
	2697	+ if ($status_code !== 200) {
	2698	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	2699	+
	2700	+ $error_message = isset($response_body['error']['message'])
	2701	+ ? $response_body['error']['message']
	2702	+ : 'HTTP Error ' . $status_code;
	2703	+
	2704	+ $error_type = isset($response_body['error']['type'])
	2705	+ ? $response_body['error']['type']
	2706	+ : 'unknown';
	2707	+
	2708	+ //error_log('Embedding API HTTP Error: ' . $status_code . ' - ' . $error_message);
	2709	+
	2710	+ // Handle specific error types
	2711	+ switch ($error_type) {
	2712	+ case 'invalid_request_error':
	2713	+ if (strpos($error_message, 'API key') !== false) {
	2714	+ return [
	2715	+ 'error' => esc_html__('Invalid API key for embedding generation. Please check your API key configuration.', 'mxchat'),
	2716	+ 'error_code' => 'embedding_invalid_api_key'
	2717	+ ];
	2718	+ }
	2719	+ break;
	2720	+
	2721	+ case 'authentication_error':
	2722	+ return [
	2723	+ 'error' => esc_html__('Authentication failed for embedding generation. Please check your API key.', 'mxchat'),
	2724	+ 'error_code' => 'embedding_auth_error'
	2725	+ ];
	2726	+
	2727	+ case 'rate_limit_exceeded':
	2728	+ return [
	2729	+ 'error' => esc_html__('Rate limit exceeded for embedding generation. Please try again later.', 'mxchat'),
	2730	+ 'error_code' => 'embedding_rate_limit'
	2731	+ ];
	2732	+
	2733	+ case 'quota_exceeded':
	2734	+ return [
	2735	+ 'error' => esc_html__('API quota exceeded for embedding generation. Please check your billing details.', 'mxchat'),
	2736	+ 'error_code' => 'embedding_quota_exceeded'
	2737	+ ];
	2738	+ }
	2739	+
	2740	+ // Generic error fallback
	2741	+ return [
	2742	+ 'error' => esc_html__('Embedding API error - check embedding API key.: ', 'mxchat') . esc_html($error_message),
	2743	+ 'error_code' => 'embedding_api_error',
	2744	+ 'status_code' => $status_code
	2745	+ ];
	2746	+ }
	2747	+
	2748	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	2749	+
	2750	+ if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) {
	2751	+ return $response_body['data'][0]['embedding'];
	2752	+ } else {
	2753	+ //error_log('Invalid embedding response: ' . wp_json_encode($response_body));
	2754	+ return [
	2755	+ 'error' => esc_html__('Received invalid embedding data from the API.', 'mxchat'),
	2756	+ 'error_code' => 'invalid_embedding_response'
	2757	+ ];
	2758	+ }
	2759	+ } catch (Exception $e) {
	2760	+ //error_log('Embedding Exception: ' . $e->getMessage());
	2761	+ return [
	2762	+ 'error' => esc_html__('System error when generating embeddings: ', 'mxchat') . esc_html($e->getMessage()),
	2763	+ 'error_code' => 'embedding_exception'
	2764	+ ];
	2765	+ }
	2766	+}
	2767	+
	2768	+
	2769	+private function mxchat_find_relevant_content($user_embedding) {
	2770	+ //error_log('MXChat Vector Search: Starting content search...');
	2771	+
	2772	+ // Retrieve the add-on settings from the database.
	2773	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	2774	+
	2775	+ // Determine whether Pinecone is enabled.
	2776	+ // We expect the sanitized setting to be a string '1' if enabled, otherwise '0'.
	2777	+ $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
	2778	+
	2779	+ //error_log('Pinecone enabled flag: ' . $use_pinecone);
	2780	+
	2781	+ if ($use_pinecone === 1) {
	2782	+ //error_log('MXChat Vector Search: Using Pinecone database');
	2783	+ return $this->find_relevant_content_pinecone($user_embedding);
	2784	+ } else {
	2785	+ //error_log('MXChat Vector Search: Using WordPress database');
	2786	+ return $this->find_relevant_content_wordpress($user_embedding);
	2787	+ }
	2788	+}
	2789	+
	2790	+
	2791	+private function find_relevant_content_wordpress($user_embedding) {
	2792	+ global $wpdb;
	2793	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	2794	+ $cache_key = 'mxchat_system_prompt_embeddings';
	2795	+ $batch_size = 500;
	2796	+
	2797	+ // Log start of matching process
	2798	+ //error_log('[MXCHAT] Starting similarity matching process');
	2799	+
	2800	+ // Retrieve embeddings from cache or database
	2801	+ $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
	2802	+ if ($embeddings === false) {
	2803	+ //error_log('[MXCHAT] Cache miss - loading embeddings from database');
	2804	+ $embeddings = [];
	2805	+ $offset = 0;
	2806	+
	2807	+ // Load in batches and build cache
	2808	+ do {
	2809	+ $query = $wpdb->prepare(
	2810	+ "SELECT id, embedding_vector
	2811	+ FROM {$system_prompt_table}
	2812	+ LIMIT %d OFFSET %d",
	2813	+ $batch_size,
	2814	+ $offset
	2815	+ );
	2816	+
	2817	+ $batch = $wpdb->get_results($query);
	2818	+ if (empty($batch)) {
	2819	+ break;
	2820	+ }
	2821	+
	2822	+ $embeddings = array_merge($embeddings, $batch);
	2823	+ $offset += $batch_size;
	2824	+
	2825	+ // Free memory
	2826	+ unset($batch);
	2827	+
	2828	+ } while (true);
	2829	+
	2830	+ if (empty($embeddings)) {
	2831	+ //error_log('[MXCHAT] No embeddings found in database');
	2832	+ return ''; // Return an empty string if no embeddings found
	2833	+ }
	2834	+ wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
	2835	+ //error_log('[MXCHAT] Cached ' . count($embeddings) . ' embeddings');
	2836	+ } else {
	2837	+ //error_log('[MXCHAT] Using ' . count($embeddings) . ' cached embeddings');
	2838	+ }
	2839	+
	2840	+ // Initialize array to store relevant results with similarity scores
	2841	+ $relevant_results = [];
	2842	+
	2843	+ // Get the similarity threshold from the main options array only
	2844	+ $main_options = get_option('mxchat_options', []);
	2845	+ $similarity_threshold = isset($main_options['similarity_threshold'])
	2846	+ ? ((int) $main_options['similarity_threshold']) / 100
	2847	+ : 0.8; // Default to 80%
	2848	+
	2849	+ //error_log('[MXCHAT] Using similarity threshold: ' . ($similarity_threshold * 100) . '%');
	2850	+
	2851	+ // Iterate through embeddings to calculate similarity
	2852	+ foreach ($embeddings as $embedding) {
	2853	+ $database_embedding = $embedding->embedding_vector
	2854	+ ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
	2855	+ : null;
	2856	+ if (is_array($database_embedding) && is_array($user_embedding)) {
	2857	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
	2858	+
	2859	+ // Log each similarity score over 0.5 to reduce log spam
	2860	+ if ($similarity > 0.1) {
	2861	+ //error_log(sprintf('[MXCHAT] ID: %d | Similarity Score: %.4f', $embedding->id, $similarity));
	2862	+ }
	2863	+
	2864	+ $relevant_results[] = [
	2865	+ 'id' => $embedding->id,
	2866	+ 'similarity' => $similarity
	2867	+ ];
	2868	+ }
	2869	+ // Free memory
	2870	+ unset($database_embedding);
	2871	+ }
	2872	+
	2873	+ // Filter and sort relevant results by similarity
	2874	+ $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
	2875	+ return $result['similarity'] >= $similarity_threshold;
	2876	+ });
	2877	+ usort($relevant_results, function ($a, $b) {
	2878	+ return $b['similarity'] <=> $a['similarity'];
	2879	+ });
	2880	+
	2881	+ // Log number of results that met threshold
	2882	+ //error_log('[MXCHAT] ' . count($relevant_results) . ' results met the similarity threshold');
	2883	+
	2884	+ // Limit to the top 5 results
	2885	+ $top_results = array_slice($relevant_results, 0, 5);
	2886	+
	2887	+ // Log the top matches
	2888	+ //error_log('[MXCHAT] Top matching results:');
	2889	+ foreach ($top_results as $index => $result) {
	2890	+
	2891	+ }
	2892	+
	2893	+ // Initialize the final content
	2894	+ $content = '';
	2895	+
	2896	+ // Fetch and combine content for the top results
	2897	+ foreach ($top_results as $result) {
	2898	+ $chunk_content = $this->fetch_content_with_product_links($result['id']);
	2899	+ // Check if the content is PDF-related and add surrounding pages
	2900	+ if (strpos($chunk_content, '{"document_type":"pdf"') !== false) {
	2901	+ //error_log('[MXCHAT] ID ' . $result['id'] . ' is PDF content, adding surrounding pages');
	2902	+ $surrounding_content = $wpdb->get_results($wpdb->prepare(
	2903	+ "SELECT id, article_content FROM {$system_prompt_table}
	2904	+ WHERE id IN (
	2905	+ (SELECT id FROM {$system_prompt_table} WHERE id < %d ORDER BY id DESC LIMIT 1),
	2906	+ (SELECT id FROM {$system_prompt_table} WHERE id > %d ORDER BY id ASC LIMIT 1)
	2907	+ )",
	2908	+ $result['id'],
	2909	+ $result['id']
	2910	+ ));
	2911	+ // Add previous content if it exists
	2912	+ if (!empty($surrounding_content[0])) {
	2913	+ $content .= $surrounding_content[0]->article_content . "\n\n";
	2914	+ }
	2915	+ // Add the main chunk content
	2916	+ $content .= $chunk_content . "\n\n";
	2917	+ // Add next content if it exists
	2918	+ if (!empty($surrounding_content[1])) {
	2919	+ $content .= $surrounding_content[1]->article_content . "\n\n";
	2920	+ }
	2921	+ } else {
	2922	+ // For non-PDF content, add directly
	2923	+ $content .= $chunk_content . "\n\n";
	2924	+ }
	2925	+ }
	2926	+
	2927	+ // Log content length
	2928	+ //error_log('[MXCHAT] Retrieved content length: ' . strlen(trim($content)) . ' characters');
	2929	+
	2930	+ return trim($content);
	2931	+}
	2932	+
	2933	+
	2934	+private function find_relevant_content_pinecone($user_embedding) {
	2935	+ $options = get_option('mxchat_pinecone_addon_options', array());
	2936	+ $api_key = $options['mxchat_pinecone_api_key'] ?? '';
	2937	+ $host = $options['mxchat_pinecone_host'] ?? '';
	2938	+
	2939	+ if (empty($host) || empty($api_key)) {
	2940	+ //error_log('[MXCHAT Debug] Pinecone credentials not properly configured');
	2941	+ return '';
	2942	+ }
	2943	+
	2944	+ // Get the similarity threshold from the main options array only
	2945	+ $main_options = get_option('mxchat_options', []);
	2946	+ $similarity_threshold = isset($main_options['similarity_threshold'])
	2947	+ ? ((int) $main_options['similarity_threshold']) / 100
	2948	+ : 0.8; // Default to 80%
	2949	+
	2950	+ //error_log('[MXCHAT Debug] Using similarity threshold: ' . ($similarity_threshold * 100) . '%');
	2951	+
	2952	+ // Prepare the query request for Pinecone
	2953	+ $api_endpoint = "https://{$host}/query";
	2954	+
	2955	+ //error_log('[MXCHAT Debug] Querying Pinecone at: ' . $api_endpoint);
	2956	+
	2957	+ $request_body = array(
	2958	+ 'vector' => $user_embedding,
	2959	+ 'topK' => 5,
	2960	+ 'includeMetadata' => true,
	2961	+ 'includeValues' => true
	2962	+ );
	2963	+
	2964	+ $response = wp_remote_post($api_endpoint, array(
	2965	+ 'headers' => array(
	2966	+ 'Api-Key' => $api_key,
	2967	+ 'accept' => 'application/json',
	2968	+ 'content-type' => 'application/json'
	2969	+ ),
	2970	+ 'body' => wp_json_encode($request_body),
	2971	+ 'timeout' => 30
	2972	+ ));
	2973	+
	2974	+ if (is_wp_error($response)) {
	2975	+ //error_log('[MXCHAT Debug] Pinecone query error: ' . $response->get_error_message());
	2976	+ return '';
	2977	+ }
	2978	+
	2979	+ $response_code = wp_remote_retrieve_response_code($response);
	2980	+ if ($response_code !== 200) {
	2981	+ //error_log('[MXCHAT Debug] Pinecone API error: ' . wp_remote_retrieve_body($response));
	2982	+ return '';
	2983	+ }
	2984	+
	2985	+ $results = json_decode(wp_remote_retrieve_body($response), true);
	2986	+ if (empty($results['matches'])) {
	2987	+ //error_log('[MXCHAT Debug] No matches found in Pinecone response');
	2988	+ return '';
	2989	+ }
	2990	+
	2991	+ //error_log('[MXCHAT Debug] Found ' . count($results['matches']) . ' matches in Pinecone');
	2992	+
	2993	+ // Initialize the final content
	2994	+ $content = '';
	2995	+ $matches_above_threshold = 0;
	2996	+
	2997	+ // Process each match
	2998	+ foreach ($results['matches'] as $index => $match) {
	2999	+ // Log score for each match
	3000	+
	3001	+ // Skip if similarity is below threshold
	3002	+ if ($match['score'] < $similarity_threshold) {
	3003	+ continue;
	3004	+ }
	3005	+
	3006	+ $matches_above_threshold++;
	3007	+
	3008	+ if (!empty($match['metadata']['text']) && !empty($match['metadata']['source_url'])) {
	3009	+ // Add content with citation
	3010	+ $content .= $match['metadata']['text'] . "\n";
	3011	+ $content .= "Source: " . $match['metadata']['source_url'] . "\n\n";
	3012	+ }
	3013	+ }
	3014	+
	3015	+ //error_log('[MXCHAT Debug] Total matches used (above threshold): ' . $matches_above_threshold);
	3016	+ //error_log('[MXCHAT Debug] Content length returned: ' . strlen(trim($content)) . ' characters');
	3017	+
	3018	+ return trim($content);
	3019	+}
	3020	+
	3021	+private function mxchat_find_relevant_products($user_embedding) {
	3022	+ //error_log('MXChat Vector Search: Starting product search...');
	3023	+
	3024	+ // Retrieve the add-on settings from the database
	3025	+ $addon_options = get_option('mxchat_pinecone_addon_options', array());
	3026	+
	3027	+ // Determine whether Pinecone is enabled
	3028	+ $use_pinecone = (isset($addon_options['mxchat_use_pinecone']) && $addon_options['mxchat_use_pinecone'] === '1') ? 1 : 0;
	3029	+
	3030	+ //error_log('Pinecone enabled flag: ' . $use_pinecone);
	3031	+
	3032	+ if ($use_pinecone === 1) {
	3033	+ //error_log('MXChat Vector Search: Using Pinecone database for products');
	3034	+ return $this->find_relevant_products_pinecone($user_embedding);
	3035	+ } else {
	3036	+ //error_log('MXChat Vector Search: Using WordPress database for products');
	3037	+ return $this->find_relevant_products_wordpress($user_embedding);
	3038	+ }
	3039	+}
	3040	+
	3041	+private function find_relevant_products_wordpress($user_embedding) {
	3042	+ global $wpdb;
	3043	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	3044	+ $cache_key = 'mxchat_system_prompt_embeddings';
	3045	+ $batch_size = 500;
	3046	+
	3047	+ // Original WordPress database search logic
	3048	+ // [Previous implementation remains the same]
	3049	+ $embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts');
	3050	+ if ($embeddings === false) {
	3051	+ $embeddings = [];
	3052	+ $offset = 0;
	3053	+
	3054	+ do {
	3055	+ $query = $wpdb->prepare(
	3056	+ "SELECT id, embedding_vector
	3057	+ FROM {$system_prompt_table}
	3058	+ LIMIT %d OFFSET %d",
	3059	+ $batch_size,
	3060	+ $offset
	3061	+ );
	3062	+
	3063	+ $batch = $wpdb->get_results($query);
	3064	+ if (empty($batch)) {
	3065	+ break;
	3066	+ }
	3067	+
	3068	+ $embeddings = array_merge($embeddings, $batch);
	3069	+ $offset += $batch_size;
	3070	+
	3071	+ unset($batch);
	3072	+
	3073	+ } while (true);
	3074	+
	3075	+ if (empty($embeddings)) {
	3076	+ return '';
	3077	+ }
	3078	+ wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600);
	3079	+ }
	3080	+
	3081	+ $relevant_results = [];
	3082	+ foreach ($embeddings as $embedding) {
	3083	+ $database_embedding = $embedding->embedding_vector
	3084	+ ? unserialize($embedding->embedding_vector, ['allowed_classes' => false])
	3085	+ : null;
	3086	+ if (is_array($database_embedding) && is_array($user_embedding)) {
	3087	+ $similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding);
	3088	+ $relevant_results[] = [
	3089	+ 'id' => $embedding->id,
	3090	+ 'similarity' => $similarity
	3091	+ ];
	3092	+ }
	3093	+ unset($database_embedding);
	3094	+ }
	3095	+
	3096	+ // Use fixed threshold for products
	3097	+ $similarity_threshold = 0.85;
	3098	+
	3099	+ $relevant_results = array_filter($relevant_results, function ($result) use ($similarity_threshold) {
	3100	+ return $result['similarity'] >= $similarity_threshold;
	3101	+ });
	3102	+ usort($relevant_results, function ($a, $b) {
	3103	+ return $b['similarity'] <=> $a['similarity'];
	3104	+ });
	3105	+
	3106	+ $top_results = array_slice($relevant_results, 0, 5);
	3107	+ $content = '';
	3108	+
	3109	+ foreach ($top_results as $result) {
	3110	+ $chunk_content = $this->fetch_content_with_product_links($result['id']);
	3111	+ $content .= $chunk_content . "\n\n";
	3112	+ }
	3113	+
	3114	+ return trim($content);
	3115	+}
	3116	+
	3117	+// Modified search function with correct filter syntax
	3118	+private function find_relevant_products_pinecone($user_embedding) {
	3119	+ //error_log('Starting Pinecone product search...');
	3120	+
	3121	+ $options = get_option('mxchat_pinecone_addon_options', array());
	3122	+ $api_key = $options['mxchat_pinecone_api_key'] ?? '';
	3123	+ $host = $options['mxchat_pinecone_host'] ?? '';
	3124	+
	3125	+ if (empty($host) || empty($api_key)) {
	3126	+ //error_log('Pinecone credentials not properly configured for product search');
	3127	+ return '';
	3128	+ }
	3129	+
	3130	+ $similarity_threshold = 0.85;
	3131	+ $api_endpoint = "https://{$host}/query";
	3132	+
	3133	+ $request_body = array(
	3134	+ 'vector' => $user_embedding,
	3135	+ 'topK' => 5,
	3136	+ 'includeMetadata' => true,
	3137	+ 'includeValues' => true,
	3138	+ 'filter' => array(
	3139	+ 'type' => 'product'
	3140	+ )
	3141	+ );
	3142	+
	3143	+ //error_log('Sending request to Pinecone with body: ' . wp_json_encode($request_body));
	3144	+
	3145	+ $response = wp_remote_post($api_endpoint, array(
	3146	+ 'headers' => array(
	3147	+ 'Api-Key' => $api_key,
	3148	+ 'accept' => 'application/json',
	3149	+ 'content-type' => 'application/json'
	3150	+ ),
	3151	+ 'body' => wp_json_encode($request_body),
	3152	+ 'timeout' => 30
	3153	+ ));
	3154	+
	3155	+ if (is_wp_error($response)) {
	3156	+ //error_log('Pinecone product query error: ' . $response->get_error_message());
	3157	+ return '';
	3158	+ }
	3159	+
	3160	+ $response_code = wp_remote_retrieve_response_code($response);
	3161	+ //error_log('Pinecone response code: ' . $response_code);
	3162	+
	3163	+ if ($response_code !== 200) {
	3164	+ //error_log('Pinecone API error during product search: ' . wp_remote_retrieve_body($response));
	3165	+ return '';
	3166	+ }
	3167	+
	3168	+ $results = json_decode(wp_remote_retrieve_body($response), true);
	3169	+ //error_log('Pinecone raw response: ' . wp_remote_retrieve_body($response));
	3170	+
	3171	+ if (empty($results['matches'])) {
	3172	+ //error_log('No matches found in Pinecone response');
	3173	+ return '';
	3174	+ }
	3175	+
	3176	+ $content = '';
	3177	+ foreach ($results['matches'] as $match) {
	3178	+ if ($match['score'] < $similarity_threshold) {
	3179	+ //error_log("Match below threshold: " . $match['score']);
	3180	+ continue;
	3181	+ }
	3182	+
	3183	+ if (!empty($match['metadata']['text'])) {
	3184	+ $content .= $match['metadata']['text'];
	3185	+ if (!empty($match['metadata']['source_url'])) {
	3186	+ $content .= "\n\nFor more details, check out this product: " . esc_url($match['metadata']['source_url']);
	3187	+ }
	3188	+ $content .= "\n\n";
	3189	+ }
	3190	+ }
	3191	+
	3192	+ return trim($content);
	3193	+}
	3194	+
	3195	+
	3196	+private function fetch_content_with_product_links($most_relevant_id) {
	3197	+ global $wpdb;
	3198	+ $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
	3199	+
	3200	+ // Fetch the article content and associated product URL
	3201	+ $query = $wpdb->prepare("SELECT article_content, source_url FROM {$system_prompt_table} WHERE id = %d", $most_relevant_id);
	3202	+ $result = $wpdb->get_row($query);
	3203	+
	3204	+ if ($result) {
	3205	+ // Append the product link to the content if available
	3206	+ $content = $result->article_content;
	3207	+ if (!empty($result->source_url)) {
	3208	+ $content .= "\n\nFor more details, check out this product: " . esc_url($result->source_url);
	3209	+ }
	3210	+ return $content;
	3211	+ }
	3212	+
	3213	+ return null;
	3214	+}
	3215	+
	3216	+private function mxchat_generate_response($relevant_content, $api_key, $xai_api_key, $claude_api_key, $deepseek_api_key, $gemini_api_key, $conversation_history) {
	3217	+ try {
	3218	+ if (!$relevant_content) {
	3219	+ return [
	3220	+ 'error' => esc_html__("I couldn't find relevant information on that topic.", 'mxchat'),
	3221	+ 'error_code' => 'no_relevant_content'
	3222	+ ];
	3223	+ }
	3224	+
	3225	+ // Ensure conversation_history is an array
	3226	+ if (!is_array($conversation_history)) {
	3227	+ $conversation_history = array();
	3228	+ }
	3229	+
	3230	+ // Get selected model with default fallback
	3231	+ $selected_model = isset($this->options['model']) ? $this->options['model'] : 'gpt-4o';
	3232	+
	3233	+ // Extract model prefix to determine the provider
	3234	+ $model_parts = explode('-', $selected_model);
	3235	+ $provider = strtolower($model_parts[0]);
	3236	+
	3237	+ // Handle model selection based on provider prefix
	3238	+ switch ($provider) {
	3239	+ case 'gemini':
	3240	+ if (empty($gemini_api_key)) {
	3241	+ return [
	3242	+ 'error' => esc_html__('Google Gemini API key is not configured', 'mxchat'),
	3243	+ 'error_code' => 'missing_gemini_api_key'
	3244	+ ];
	3245	+ }
	3246	+ $response = $this->mxchat_generate_response_gemini(
	3247	+ $selected_model,
	3248	+ $gemini_api_key,
	3249	+ $conversation_history,
	3250	+ $relevant_content
	3251	+ );
	3252	+ break;
	3253	+
	3254	+ case 'claude':
	3255	+ if (empty($claude_api_key)) {
	3256	+ return [
	3257	+ 'error' => esc_html__('Claude API key is not configured', 'mxchat'),
	3258	+ 'error_code' => 'missing_claude_api_key'
	3259	+ ];
	3260	+ }
	3261	+ $response = $this->mxchat_generate_response_claude(
	3262	+ $selected_model,
	3263	+ $claude_api_key,
	3264	+ $conversation_history,
	3265	+ $relevant_content
	3266	+ );
	3267	+ break;
	3268	+
	3269	+ case 'grok':
	3270	+ if (empty($xai_api_key)) {
	3271	+ return [
	3272	+ 'error' => esc_html__('X.AI API key is not configured', 'mxchat'),
	3273	+ 'error_code' => 'missing_xai_api_key'
	3274	+ ];
	3275	+ }
	3276	+ $response = $this->mxchat_generate_response_xai(
	3277	+ $selected_model,
	3278	+ $xai_api_key,
	3279	+ $conversation_history,
	3280	+ $relevant_content
	3281	+ );
	3282	+ break;
	3283	+
	3284	+ case 'deepseek':
	3285	+ if (empty($deepseek_api_key)) {
	3286	+ return [
	3287	+ 'error' => esc_html__('DeepSeek API key is not configured', 'mxchat'),
	3288	+ 'error_code' => 'missing_deepseek_api_key'
	3289	+ ];
	3290	+ }
	3291	+ $response = $this->mxchat_generate_response_deepseek(
	3292	+ $selected_model,
	3293	+ $deepseek_api_key,
	3294	+ $conversation_history,
	3295	+ $relevant_content
	3296	+ );
	3297	+ break;
	3298	+
	3299	+ case 'gpt':
	3300	+ if (empty($api_key)) {
	3301	+ return [
	3302	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	3303	+ 'error_code' => 'missing_openai_api_key'
	3304	+ ];
	3305	+ }
	3306	+ $response = $this->mxchat_generate_response_openai(
	3307	+ $selected_model,
	3308	+ $api_key,
	3309	+ $conversation_history,
	3310	+ $relevant_content
	3311	+ );
	3312	+ break;
	3313	+
	3314	+ default:
	3315	+ // Default to OpenAI for custom models or unrecognized prefixes
	3316	+ if (empty($api_key)) {
	3317	+ return [
	3318	+ 'error' => esc_html__('OpenAI API key is not configured', 'mxchat'),
	3319	+ 'error_code' => 'missing_openai_api_key'
	3320	+ ];
	3321	+ }
	3322	+ $response = $this->mxchat_generate_response_openai(
	3323	+ $selected_model,
	3324	+ $api_key,
	3325	+ $conversation_history,
	3326	+ $relevant_content
	3327	+ );
	3328	+ break;
	3329	+ }
	3330	+
	3331	+ // Check if the response is an error array from the provider-specific function
	3332	+ if (is_array($response) && isset($response['error'])) {
	3333	+ return $response; // Pass through the error
	3334	+ }
	3335	+
	3336	+ return $response;
	3337	+
	3338	+ } catch (Exception $e) {
	3339	+ //error_log('MXChat Error: ' . $e->getMessage());
	3340	+ return [
	3341	+ 'error' => sprintf(esc_html__('An error occurred: %s', 'mxchat'), esc_html($e->getMessage())),
	3342	+ 'error_code' => 'system_exception',
	3343	+ 'exception_details' => $e->getMessage()
	3344	+ ];
	3345	+ }
	3346	+}
	3347	+
	3348	+private function mxchat_generate_response_deepseek($selected_model, $deepseek_api_key, $conversation_history, $relevant_content) {
	3349	+ try {
	3350	+ // Ensure conversation_history is an array
	3351	+ if (!is_array($conversation_history)) {
	3352	+ $conversation_history = array();
	3353	+ }
	3354	+
	3355	+ // Get system prompt instructions from options
	3356	+ $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	3357	+
	3358	+ // Create a new array for the formatted conversation
	3359	+ $formatted_conversation = array();
	3360	+
	3361	+ // Add system message first
	3362	+ $formatted_conversation[] = array(
	3363	+ 'role' => 'system',
	3364	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	3365	+ );
	3366	+
	3367	+ // Add the rest of the conversation history
	3368	+ foreach ($conversation_history as $message) {
	3369	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	3370	+ $role = $message['role'];
	3371	+
	3372	+ // Convert roles to supported format
	3373	+ if ($role === 'bot' || $role === 'agent') {
	3374	+ $role = 'assistant';
	3375	+ }
	3376	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	3377	+ $role = 'user';
	3378	+ }
	3379	+
	3380	+ $formatted_conversation[] = array(
	3381	+ 'role' => $role,
	3382	+ 'content' => $message['content']
	3383	+ );
	3384	+ }
	3385	+ }
	3386	+
	3387	+ $body = json_encode([
	3388	+ 'model' => $selected_model,
	3389	+ 'messages' => $formatted_conversation,
	3390	+ 'temperature' => 0.8,
	3391	+ 'stream' => false
	3392	+ ]);
	3393	+
	3394	+ $args = [
	3395	+ 'body' => $body,
	3396	+ 'headers' => [
	3397	+ 'Content-Type' => 'application/json',
	3398	+ 'Authorization' => 'Bearer ' . $deepseek_api_key,
	3399	+ ],
	3400	+ 'timeout' => 60,
	3401	+ 'redirection' => 5,
	3402	+ 'blocking' => true,
	3403	+ 'httpversion' => '1.0',
	3404	+ 'sslverify' => true,
	3405	+ ];
	3406	+
	3407	+ $response = wp_remote_post('https://api.deepseek.com/v1/chat/completions', $args);
	3408	+
	3409	+ if (is_wp_error($response)) {
	3410	+ $error_message = $response->get_error_message();
	3411	+ //error_log('DeepSeek API Error: ' . $error_message);
	3412	+ return [
	3413	+ 'error' => esc_html__('Connection error when contacting DeepSeek: ', 'mxchat') . esc_html($error_message),
	3414	+ 'error_code' => 'deepseek_connection_error',
	3415	+ 'provider' => 'deepseek'
	3416	+ ];
	3417	+ }
	3418	+
	3419	+ $status_code = wp_remote_retrieve_response_code($response);
	3420	+ if ($status_code !== 200) {
	3421	+ $response_body = wp_remote_retrieve_body($response);
	3422	+ $decoded_response = json_decode($response_body, true);
	3423	+
	3424	+ $error_message = isset($decoded_response['error']['message'])
	3425	+ ? $decoded_response['error']['message']
	3426	+ : 'HTTP Error ' . $status_code;
	3427	+
	3428	+ $error_type = isset($decoded_response['error']['type'])
	3429	+ ? $decoded_response['error']['type']
	3430	+ : 'unknown';
	3431	+
	3432	+ //error_log('DeepSeek API HTTP Error: ' . $status_code . ' - ' . $error_message);
	3433	+
	3434	+ // Handle specific error types
	3435	+ switch ($status_code) {
	3436	+ case 401:
	3437	+ return [
	3438	+ 'error' => esc_html__('Authentication failed with DeepSeek. Please check your API key.', 'mxchat'),
	3439	+ 'error_code' => 'deepseek_auth_error',
	3440	+ 'provider' => 'deepseek'
	3441	+ ];
	3442	+
	3443	+ case 400:
	3444	+ if (strpos($error_message, 'API key') !== false) {
	3445	+ return [
	3446	+ 'error' => esc_html__('Invalid DeepSeek API key. Please check your API key configuration.', 'mxchat'),
	3447	+ 'error_code' => 'deepseek_invalid_api_key',
	3448	+ 'provider' => 'deepseek'
	3449	+ ];
	3450	+ }
	3451	+ break;
	3452	+
	3453	+ case 429:
	3454	+ if (strpos($error_message, 'quota') !== false) {
	3455	+ return [
	3456	+ 'error' => esc_html__('DeepSeek API quota exceeded. Please check your billing details.', 'mxchat'),
	3457	+ 'error_code' => 'deepseek_quota_exceeded',
	3458	+ 'provider' => 'deepseek'
	3459	+ ];
	3460	+ } else {
	3461	+ return [
	3462	+ 'error' => esc_html__('DeepSeek rate limit exceeded. Please try again later.', 'mxchat'),
	3463	+ 'error_code' => 'deepseek_rate_limit',
	3464	+ 'provider' => 'deepseek'
	3465	+ ];
	3466	+ }
	3467	+
	3468	+ case 500:
	3469	+ case 502:
	3470	+ case 503:
	3471	+ case 504:
	3472	+ return [
	3473	+ 'error' => esc_html__('DeepSeek service is currently unavailable. Please try again later.', 'mxchat'),
	3474	+ 'error_code' => 'deepseek_service_unavailable',
	3475	+ 'provider' => 'deepseek'
	3476	+ ];
	3477	+ }
	3478	+
	3479	+ // Generic error fallback
	3480	+ return [
	3481	+ 'error' => esc_html__('DeepSeek API error: ', 'mxchat') . esc_html($error_message),
	3482	+ 'error_code' => 'deepseek_api_error',
	3483	+ 'provider' => 'deepseek',
	3484	+ 'status_code' => $status_code
	3485	+ ];
	3486	+ }
	3487	+
	3488	+ $response_body = wp_remote_retrieve_body($response);
	3489	+ $decoded_response = json_decode($response_body, true);
	3490	+
	3491	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	3492	+ return trim($decoded_response['choices'][0]['message']['content']);
	3493	+ } else {
	3494	+ //error_log('DeepSeek API Response Format Error: ' . print_r($decoded_response, true));
	3495	+ return [
	3496	+ 'error' => esc_html__('Unexpected response format from DeepSeek.', 'mxchat'),
	3497	+ 'error_code' => 'deepseek_response_format_error',
	3498	+ 'provider' => 'deepseek'
	3499	+ ];
	3500	+ }
	3501	+ } catch (Exception $e) {
	3502	+ //error_log('DeepSeek Exception: ' . $e->getMessage());
	3503	+ return [
	3504	+ 'error' => esc_html__('System error when processing DeepSeek request: ', 'mxchat') . esc_html($e->getMessage()),
	3505	+ 'error_code' => 'deepseek_exception',
	3506	+ 'provider' => 'deepseek'
	3507	+ ];
	3508	+ }
	3509	+}
	3510	+
	3511	+private function mxchat_generate_response_openai($selected_model, $api_key, $conversation_history, $relevant_content) {
	3512	+ try {
	3513	+ // Ensure conversation_history is an array
	3514	+ if (!is_array($conversation_history)) {
	3515	+ $conversation_history = array();
	3516	+ }
	3517	+
	3518	+ // Get system prompt instructions from options
	3519	+ $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	3520	+
	3521	+ // Create a new array for the formatted conversation
	3522	+ $formatted_conversation = array();
	3523	+
	3524	+ // Add system message first
	3525	+ $formatted_conversation[] = array(
	3526	+ 'role' => 'system',
	3527	+ 'content' => $system_prompt_instructions . " " . $relevant_content
	3528	+ );
	3529	+
	3530	+ // Add the rest of the conversation history
	3531	+ foreach ($conversation_history as $message) {
	3532	+ if (is_array($message) && isset($message['role']) && isset($message['content'])) {
	3533	+ $role = $message['role'];
	3534	+
	3535	+ // Convert roles to supported format
	3536	+ if ($role === 'bot' || $role === 'agent') {
	3537	+ $role = 'assistant';
	3538	+ }
	3539	+ if (!in_array($role, ['system', 'assistant', 'user', 'function', 'tool'])) {
	3540	+ $role = 'user';
	3541	+ }
	3542	+
	3543	+ $formatted_conversation[] = array(
	3544	+ 'role' => $role,
	3545	+ 'content' => $message['content']
	3546	+ );
	3547	+ }
	3548	+ }
	3549	+
	3550	+ $body = json_encode([
	3551	+ 'model' => $selected_model,
	3552	+ 'messages' => $formatted_conversation,
	3553	+ 'temperature' => 0.8,
	3554	+ 'stream' => false
	3555	+ ]);
	3556	+
	3557	+ $args = [
	3558	+ 'body' => $body,
	3559	+ 'headers' => [
	3560	+ 'Content-Type' => 'application/json',
	3561	+ 'Authorization' => 'Bearer ' . $api_key,
	3562	+ ],
	3563	+ 'timeout' => 60,
	3564	+ 'redirection' => 5,
	3565	+ 'blocking' => true,
	3566	+ 'httpversion' => '1.0',
	3567	+ 'sslverify' => true,
	3568	+ ];
	3569	+
	3570	+ $response = wp_remote_post('https://api.openai.com/v1/chat/completions', $args);
	3571	+
	3572	+ if (is_wp_error($response)) {
	3573	+ $error_message = $response->get_error_message();
	3574	+ //error_log('OpenAI API Error: ' . $error_message);
	3575	+ return [
	3576	+ 'error' => esc_html__('Connection error when contacting OpenAI: ', 'mxchat') . esc_html($error_message),
	3577	+ 'error_code' => 'openai_connection_error',
	3578	+ 'provider' => 'openai'
	3579	+ ];
	3580	+ }
	3581	+
	3582	+ $status_code = wp_remote_retrieve_response_code($response);
	3583	+ if ($status_code !== 200) {
	3584	+ $response_body = wp_remote_retrieve_body($response);
	3585	+ $decoded_response = json_decode($response_body, true);
	3586	+
	3587	+ $error_message = isset($decoded_response['error']['message'])
	3588	+ ? $decoded_response['error']['message']
	3589	+ : 'HTTP Error ' . $status_code;
	3590	+
	3591	+ $error_type = isset($decoded_response['error']['type'])
	3592	+ ? $decoded_response['error']['type']
	3593	+ : 'unknown';
	3594	+
	3595	+ //error_log('OpenAI API HTTP Error: ' . $status_code . ' - ' . $error_message);
	3596	+
	3597	+ // Handle specific error types
	3598	+ switch ($error_type) {
	3599	+ case 'invalid_request_error':
	3600	+ if (strpos($error_message, 'API key') !== false) {
	3601	+ return [
	3602	+ 'error' => esc_html__('Invalid OpenAI API key. Please check your API key configuration.', 'mxchat'),
	3603	+ 'error_code' => 'openai_invalid_api_key',
	3604	+ 'provider' => 'openai'
	3605	+ ];
	3606	+ }
	3607	+ break;
	3608	+
	3609	+ case 'authentication_error':
	3610	+ return [
	3611	+ 'error' => esc_html__('Authentication failed with OpenAI. Please check your API key.', 'mxchat'),
	3612	+ 'error_code' => 'openai_auth_error',
	3613	+ 'provider' => 'openai'
	3614	+ ];
	3615	+
	3616	+ case 'rate_limit_exceeded':
	3617	+ return [
	3618	+ 'error' => esc_html__('OpenAI rate limit exceeded. Please try again later.', 'mxchat'),
	3619	+ 'error_code' => 'openai_rate_limit',
	3620	+ 'provider' => 'openai'
	3621	+ ];
	3622	+
	3623	+ case 'quota_exceeded':
	3624	+ return [
	3625	+ 'error' => esc_html__('OpenAI API quota exceeded. Please check your billing details.', 'mxchat'),
	3626	+ 'error_code' => 'openai_quota_exceeded',
	3627	+ 'provider' => 'openai'
	3628	+ ];
	3629	+ }
	3630	+
	3631	+ // Generic error fallback
	3632	+ return [
	3633	+ 'error' => esc_html__('OpenAI API error: ', 'mxchat') . esc_html($error_message),
	3634	+ 'error_code' => 'openai_api_error',
	3635	+ 'provider' => 'openai',
	3636	+ 'status_code' => $status_code
	3637	+ ];
	3638	+ }
	3639	+
	3640	+ $response_body = wp_remote_retrieve_body($response);
	3641	+ $decoded_response = json_decode($response_body, true);
	3642	+
	3643	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	3644	+ return trim($decoded_response['choices'][0]['message']['content']);
	3645	+ } else {
	3646	+ //error_log('OpenAI API Response Format Error: ' . print_r($decoded_response, true));
	3647	+ return [
	3648	+ 'error' => esc_html__('Unexpected response format from OpenAI.', 'mxchat'),
	3649	+ 'error_code' => 'openai_response_format_error',
	3650	+ 'provider' => 'openai'
	3651	+ ];
	3652	+ }
	3653	+ } catch (Exception $e) {
	3654	+ //error_log('OpenAI Exception: ' . $e->getMessage());
	3655	+ return [
	3656	+ 'error' => esc_html__('System error when processing OpenAI request: ', 'mxchat') . esc_html($e->getMessage()),
	3657	+ 'error_code' => 'openai_exception',
	3658	+ 'provider' => 'openai'
	3659	+ ];
	3660	+ }
	3661	+}
	3662	+private function mxchat_generate_response_xai($selected_model, $xai_api_key, $conversation_history, $relevant_content) {
	3663	+ try {
	3664	+ // Get system prompt instructions from options
	3665	+ $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	3666	+
	3667	+ // Add system prompt to relevant content
	3668	+ $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
	3669	+
	3670	+ // Prepend system instructions to the conversation history
	3671	+ array_unshift($conversation_history, [
	3672	+ 'role' => 'system',
	3673	+ 'content' => "Here are your instructions: " . $content_with_instructions
	3674	+ ]);
	3675	+
	3676	+ // Ensure consistency: Replace 'bot' and 'agent' roles with supported values
	3677	+ foreach ($conversation_history as &$message) {
	3678	+ if ($message['role'] === 'bot') {
	3679	+ $message['role'] = 'assistant';
	3680	+ } elseif ($message['role'] === 'agent') {
	3681	+ // Tag the message as coming from a live agent
	3682	+ $message['role'] = 'assistant';
	3683	+ if (!isset($message['metadata'])) {
	3684	+ $message['metadata'] = ['source' => 'live_agent'];
	3685	+ }
	3686	+ }
	3687	+
	3688	+ // Ensure all roles are valid
	3689	+ if (!in_array($message['role'], ['system', 'assistant', 'user', 'function', 'tool'])) {
	3690	+ $message['role'] = 'user'; // Default to 'user'
	3691	+ }
	3692	+ }
	3693	+
	3694	+ // Build the request body
	3695	+ $body = json_encode([
	3696	+ 'model' => $selected_model,
	3697	+ 'messages' => $conversation_history,
	3698	+ 'temperature' => 0.8,
	3699	+ 'stream' => false
	3700	+ ]);
	3701	+
	3702	+ // Set up the API request
	3703	+ $args = [
	3704	+ 'body' => $body,
	3705	+ 'headers' => [
	3706	+ 'Content-Type' => 'application/json',
	3707	+ 'Authorization' => 'Bearer ' . $xai_api_key,
	3708	+ ],
	3709	+ 'timeout' => 60,
	3710	+ 'redirection' => 5,
	3711	+ 'blocking' => true,
	3712	+ 'httpversion' => '1.0',
	3713	+ 'sslverify' => true,
	3714	+ ];
	3715	+
	3716	+ // Make the API request
	3717	+ $response = wp_remote_post('https://api.x.ai/v1/chat/completions', $args);
	3718	+
	3719	+ // Process the response
	3720	+ if (is_wp_error($response)) {
	3721	+ $error_message = $response->get_error_message();
	3722	+ //error_log('X.AI API Error: ' . $error_message);
	3723	+ return [
	3724	+ 'error' => esc_html__('Connection error when contacting X.AI: ', 'mxchat') . esc_html($error_message),
	3725	+ 'error_code' => 'xai_connection_error',
	3726	+ 'provider' => 'xai'
	3727	+ ];
	3728	+ }
	3729	+
	3730	+ $status_code = wp_remote_retrieve_response_code($response);
	3731	+ if ($status_code !== 200) {
	3732	+ $response_body = wp_remote_retrieve_body($response);
	3733	+ $decoded_response = json_decode($response_body, true);
	3734	+
	3735	+ // Log the full response for debugging
	3736	+ //error_log('X.AI Error Response: ' . print_r($decoded_response, true));
	3737	+
	3738	+ // Extract error message from X.AI's specific format
	3739	+ $error_message = '';
	3740	+
	3741	+ // Check for direct error string (as seen in your logs)
	3742	+ if (isset($decoded_response['error']) && is_string($decoded_response['error'])) {
	3743	+ $error_message = $decoded_response['error'];
	3744	+ }
	3745	+ // Check for nested error object (OpenAI style)
	3746	+ elseif (isset($decoded_response['error']['message'])) {
	3747	+ $error_message = $decoded_response['error']['message'];
	3748	+ }
	3749	+ // Check for top-level message
	3750	+ elseif (isset($decoded_response['message'])) {
	3751	+ $error_message = $decoded_response['message'];
	3752	+ }
	3753	+ // Fallback
	3754	+ else {
	3755	+ $error_message = 'HTTP Error ' . $status_code;
	3756	+ }
	3757	+
	3758	+ //error_log('X.AI API HTTP Error: ' . $status_code . ' - ' . $error_message);
	3759	+
	3760	+ // Check for API key errors using string matching
	3761	+ if (stripos($error_message, 'api key') !== false ||
	3762	+ stripos($error_message, 'incorrect api key') !== false ||
	3763	+ stripos($error_message, 'invalid api key') !== false) {
	3764	+ return [
	3765	+ 'error' => esc_html__('Invalid X.AI API key. Please check your API key configuration.', 'mxchat'),
	3766	+ 'error_code' => 'xai_invalid_api_key',
	3767	+ 'provider' => 'xai'
	3768	+ ];
	3769	+ }
	3770	+
	3771	+ // Authentication errors
	3772	+ if ($status_code === 401 || $status_code === 403 ||
	3773	+ stripos($error_message, 'auth') !== false) {
	3774	+ return [
	3775	+ 'error' => esc_html__('Authentication failed with X.AI. Please check your API key.', 'mxchat'),
	3776	+ 'error_code' => 'xai_auth_error',
	3777	+ 'provider' => 'xai'
	3778	+ ];
	3779	+ }
	3780	+
	3781	+ // Model errors
	3782	+ if (stripos($error_message, 'model') !== false) {
	3783	+ return [
	3784	+ 'error' => esc_html__('Invalid model specified for X.AI. Please check your model configuration.', 'mxchat'),
	3785	+ 'error_code' => 'xai_invalid_model',
	3786	+ 'provider' => 'xai'
	3787	+ ];
	3788	+ }
	3789	+
	3790	+ // Rate limit errors
	3791	+ if ($status_code === 429 ||
	3792	+ stripos($error_message, 'rate') !== false ||
	3793	+ stripos($error_message, 'limit') !== false) {
	3794	+ return [
	3795	+ 'error' => esc_html__('X.AI rate limit exceeded. Please try again later.', 'mxchat'),
	3796	+ 'error_code' => 'xai_rate_limit',
	3797	+ 'provider' => 'xai'
	3798	+ ];
	3799	+ }
	3800	+
	3801	+ // Quota errors
	3802	+ if (stripos($error_message, 'quota') !== false ||
	3803	+ stripos($error_message, 'billing') !== false) {
	3804	+ return [
	3805	+ 'error' => esc_html__('X.AI API quota exceeded. Please check your billing details.', 'mxchat'),
	3806	+ 'error_code' => 'xai_quota_exceeded',
	3807	+ 'provider' => 'xai'
	3808	+ ];
	3809	+ }
	3810	+
	3811	+ // Server errors
	3812	+ if ($status_code >= 500) {
	3813	+ return [
	3814	+ 'error' => esc_html__('X.AI service is currently unavailable. Please try again later.', 'mxchat'),
	3815	+ 'error_code' => 'xai_service_unavailable',
	3816	+ 'provider' => 'xai'
	3817	+ ];
	3818	+ }
	3819	+
	3820	+ // Generic error fallback with the actual error message
	3821	+ return [
	3822	+ 'error' => esc_html__('X.AI API error: ', 'mxchat') . esc_html($error_message),
	3823	+ 'error_code' => 'xai_api_error',
	3824	+ 'provider' => 'xai',
	3825	+ 'status_code' => $status_code
	3826	+ ];
	3827	+ }
	3828	+
	3829	+ $response_body = wp_remote_retrieve_body($response);
	3830	+ $decoded_response = json_decode($response_body, true);
	3831	+
	3832	+ if (isset($decoded_response['choices'][0]['message']['content'])) {
	3833	+ return trim($decoded_response['choices'][0]['message']['content']);
	3834	+ } else {
	3835	+ //error_log('X.AI API Response Format Error: ' . print_r($decoded_response, true));
	3836	+ return [
	3837	+ 'error' => esc_html__('Unexpected response format from X.AI.', 'mxchat'),
	3838	+ 'error_code' => 'xai_response_format_error',
	3839	+ 'provider' => 'xai'
	3840	+ ];
	3841	+ }
	3842	+} catch (Exception $e) {
	3843	+ //error_log('X.AI Exception: ' . $e->getMessage());
	3844	+ return [
	3845	+ 'error' => esc_html__('System error when processing X.AI request: ', 'mxchat') . esc_html($e->getMessage()),
	3846	+ 'error_code' => 'xai_exception',
	3847	+ 'provider' => 'xai'
	3848	+ ];
	3849	+}
	3850	+}
	3851	+private function mxchat_generate_response_claude($selected_model, $claude_api_key, $conversation_history, $relevant_content) {
	3852	+ // Get system prompt instructions from options
	3853	+ $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	3854	+
	3855	+ // Clean and validate conversation history
	3856	+ foreach ($conversation_history as &$message) {
	3857	+ // Convert bot and agent roles to assistant
	3858	+ if ($message['role'] === 'bot' || $message['role'] === 'agent') {
	3859	+ $message['role'] = 'assistant';
	3860	+ }
	3861	+
	3862	+ // Remove unsupported roles - Claude only supports 'assistant' and 'user'
	3863	+ if (!in_array($message['role'], ['assistant', 'user'])) {
	3864	+ $message['role'] = 'user';
	3865	+ }
	3866	+
	3867	+ // Ensure content field exists
	3868	+ if (!isset($message['content']) || empty($message['content'])) {
	3869	+ $message['content'] = '';
	3870	+ }
	3871	+
	3872	+ // Remove any unsupported fields
	3873	+ $message = array_intersect_key($message, array_flip(['role', 'content']));
	3874	+ }
	3875	+
	3876	+ // Add relevant content as the latest user message
	3877	+ $conversation_history[] = [
	3878	+ 'role' => 'user',
	3879	+ 'content' => $relevant_content
	3880	+ ];
	3881	+
	3882	+ // Build request body
	3883	+ $body = json_encode([
	3884	+ 'model' => $selected_model,
	3885	+ 'max_tokens' => 1000,
	3886	+ 'temperature' => 0.8,
	3887	+ 'messages' => $conversation_history,
	3888	+ 'system' => $system_prompt_instructions
	3889	+ ]);
	3890	+
	3891	+ // Set up API request
	3892	+ $args = [
	3893	+ 'body' => $body,
	3894	+ 'headers' => [
	3895	+ 'Content-Type' => 'application/json',
	3896	+ 'x-api-key' => $claude_api_key,
	3897	+ 'anthropic-version' => '2023-06-01'
	3898	+ ],
	3899	+ 'timeout' => 60,
	3900	+ 'redirection' => 5,
	3901	+ 'blocking' => true,
	3902	+ 'httpversion' => '1.0',
	3903	+ 'sslverify' => true,
	3904	+ ];
	3905	+
	3906	+ // Make API request
	3907	+ $response = wp_remote_post('https://api.anthropic.com/v1/messages', $args);
	3908	+
	3909	+ // Check for WordPress errors
	3910	+ if (is_wp_error($response)) {
	3911	+ //error_log("Claude API request error: " . $response->get_error_message());
	3912	+ return "Sorry, there was an error connecting to the API.";
	3913	+ }
	3914	+
	3915	+ // Check HTTP response code
	3916	+ $http_code = wp_remote_retrieve_response_code($response);
	3917	+ if ($http_code !== 200) {
	3918	+ $error_body = wp_remote_retrieve_body($response);
	3919	+ //error_log("Claude API HTTP error: " . $http_code . " - " . $error_body);
	3920	+
	3921	+ // Try to extract error message from response
	3922	+ $error_data = json_decode($error_body, true);
	3923	+ $error_message = isset($error_data['error']['message']) ?
	3924	+ $error_data['error']['message'] :
	3925	+ "HTTP error " . $http_code;
	3926	+
	3927	+ return "Sorry, the API returned an error: " . $error_message;
	3928	+ }
	3929	+
	3930	+ // Parse response
	3931	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	3932	+
	3933	+ // Check for JSON decode errors
	3934	+ if (json_last_error() !== JSON_ERROR_NONE) {
	3935	+ //error_log("Claude API JSON decode error: " . json_last_error_msg());
	3936	+ return "Sorry, there was an error processing the API response.";
	3937	+ }
	3938	+
	3939	+ // Extract and validate response content
	3940	+ if (isset($response_body['content']) &&
	3941	+ is_array($response_body['content']) &&
	3942	+ !empty($response_body['content']) &&
	3943	+ isset($response_body['content'][0]['text'])) {
	3944	+ return trim($response_body['content'][0]['text']);
	3945	+ }
	3946	+
	3947	+ // Log unexpected response format
	3948	+ //error_log("Claude API unexpected response format: " . print_r($response_body, true));
	3949	+ return "Sorry, I received an unexpected response format from the API.";
	3950	+}
	3951	+private function mxchat_generate_response_gemini($selected_model, $gemini_api_key, $conversation_history, $relevant_content) {
	3952	+ // Get system prompt instructions from options
	3953	+ $system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : '';
	3954	+
	3955	+ // Add system prompt to relevant content
	3956	+ $content_with_instructions = $system_prompt_instructions . " " . $relevant_content;
	3957	+
	3958	+ // Format messages for Gemini API
	3959	+ $formatted_messages = [];
	3960	+
	3961	+ // Add system message as the first user message with role prefix
	3962	+ // Note: Gemini doesn't have a dedicated system role, so we use a prefixed user message
	3963	+ $formatted_messages[] = [
	3964	+ 'role' => 'user',
	3965	+ 'parts' => [
	3966	+ ['text' => "[System Instructions] " . $content_with_instructions]
	3967	+ ]
	3968	+ ];
	3969	+
	3970	+ // Add model response to acknowledge system instructions
	3971	+ $formatted_messages[] = [
	3972	+ 'role' => 'model',
	3973	+ 'parts' => [
	3974	+ ['text' => "I understand and will follow these instructions."]
	3975	+ ]
	3976	+ ];
	3977	+
	3978	+ // Process the rest of the conversation history
	3979	+ $current_role = null;
	3980	+ $current_parts = [];
	3981	+
	3982	+ foreach ($conversation_history as $message) {
	3983	+ // Skip the first system message as we already handled it
	3984	+ if ($message['role'] === 'system') {
	3985	+ continue;
	3986	+ }
	3987	+
	3988	+ // Map roles to Gemini format
	3989	+ $gemini_role = '';
	3990	+ if ($message['role'] === 'user') {
	3991	+ $gemini_role = 'user';
	3992	+ } else if (in_array($message['role'], ['assistant', 'bot', 'agent'])) {
	3993	+ $gemini_role = 'model';
	3994	+ } else {
	3995	+ // Skip unsupported roles
	3996	+ continue;
	3997	+ }
	3998	+
	3999	+ // If we have a new role, add the previous message
	4000	+ if ($current_role !== null && $current_role !== $gemini_role && !empty($current_parts)) {
	4001	+ $formatted_messages[] = [
	4002	+ 'role' => $current_role,
	4003	+ 'parts' => $current_parts
	4004	+ ];
	4005	+ $current_parts = [];
	4006	+ }
	4007	+
	4008	+ // Set current role and add text to parts
	4009	+ $current_role = $gemini_role;
	4010	+ $current_parts[] = ['text' => $message['content']];
	4011	+ }
	4012	+
	4013	+ // Add the last message if there's content
	4014	+ if ($current_role !== null && !empty($current_parts)) {
	4015	+ $formatted_messages[] = [
	4016	+ 'role' => $current_role,
	4017	+ 'parts' => $current_parts
	4018	+ ];
	4019	+ }
	4020	+
	4021	+ // Build the request body
	4022	+ $body = json_encode([
	4023	+ 'contents' => $formatted_messages,
	4024	+ 'generationConfig' => [
	4025	+ 'temperature' => 0.7,
	4026	+ 'topP' => 0.95,
	4027	+ 'topK' => 40,
	4028	+ 'maxOutputTokens' => 8192,
	4029	+ ],
	4030	+ 'safetySettings' => [
	4031	+ [
	4032	+ 'category' => 'HARM_CATEGORY_HARASSMENT',
	4033	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	4034	+ ],
	4035	+ [
	4036	+ 'category' => 'HARM_CATEGORY_HATE_SPEECH',
	4037	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	4038	+ ],
	4039	+ [
	4040	+ 'category' => 'HARM_CATEGORY_SEXUALLY_EXPLICIT',
	4041	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	4042	+ ],
	4043	+ [
	4044	+ 'category' => 'HARM_CATEGORY_DANGEROUS_CONTENT',
	4045	+ 'threshold' => 'BLOCK_MEDIUM_AND_ABOVE'
	4046	+ ]
	4047	+ ]
	4048	+ ]);
	4049	+
	4050	+ // Prepare the API endpoint
	4051	+ $api_endpoint = 'https://generativelanguage.googleapis.com/v1/models/' . $selected_model . ':generateContent?key=' . $gemini_api_key;
	4052	+
	4053	+ // Set up the API request
	4054	+ $args = [
	4055	+ 'body' => $body,
	4056	+ 'headers' => [
	4057	+ 'Content-Type' => 'application/json',
	4058	+ ],
	4059	+ 'timeout' => 60,
	4060	+ 'redirection' => 5,
	4061	+ 'blocking' => true,
	4062	+ 'httpversion' => '1.0',
	4063	+ 'sslverify' => true,
	4064	+ ];
	4065	+
	4066	+ // Make the API request
	4067	+ $response = wp_remote_post($api_endpoint, $args);
	4068	+
	4069	+ // Process the response
	4070	+ if (is_wp_error($response)) {
	4071	+ return "Sorry, there was an error processing your request: " . $response->get_error_message();
	4072	+ }
	4073	+
	4074	+ $response_body = json_decode(wp_remote_retrieve_body($response), true);
	4075	+
	4076	+ // Handle potential errors in the response
	4077	+ if (isset($response_body['error'])) {
	4078	+ //error_log('Gemini API Error: ' . json_encode($response_body['error']));
	4079	+ return "Sorry, there was an error with the Gemini API: " .
	4080	+ (isset($response_body['error']['message']) ? $response_body['error']['message'] : 'Unknown error');
	4081	+ }
	4082	+
	4083	+ // Extract the response text
	4084	+ if (isset($response_body['candidates'][0]['content']['parts'][0]['text'])) {
	4085	+ return trim($response_body['candidates'][0]['content']['parts'][0]['text']);
	4086	+ } else {
	4087	+ //error_log('Unexpected Gemini API response format: ' . json_encode($response_body));
	4088	+ return "Sorry, I couldn't process that request. The response format was unexpected.";
	4089	+ }
	4090	+}
	4091	+
	4092	+
	4093	+
	4094	+public function mxchat_dismiss_pre_chat_message() {
	4095	+ // Get and sanitize the user identifier
	4096	+ $user_id = $this->mxchat_get_user_identifier();
	4097	+ $user_id = sanitize_key($user_id);
	4098	+
	4099	+ // Set a transient to track that the user has dismissed the pre-chat message
	4100	+ $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
	4101	+ set_transient($transient_key, true, DAY_IN_SECONDS);
	4102	+
	4103	+ wp_send_json_success();
	4104	+}
	4105	+
	4106	+public function mxchat_check_pre_chat_message_status() {
	4107	+ // Get and sanitize the user identifier
	4108	+ $user_id = $this->mxchat_get_user_identifier();
	4109	+ $user_id = sanitize_key($user_id);
	4110	+
	4111	+ // Check if the transient exists (i.e., if the message was dismissed)
	4112	+ $transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id;
	4113	+ $dismissed = get_transient($transient_key);
	4114	+
	4115	+ // Log the result to see if it's being set correctly
	4116	+ //error_log("Check pre-chat message dismissed for $user_id: " . ($dismissed ? 'Yes' : 'No'));
	4117	+
	4118	+ if ($dismissed) {
	4119	+ wp_send_json_success(['dismissed' => true]);
	4120	+ } else {
	4121	+ wp_send_json_success(['dismissed' => false]);
	4122	+ }
	4123	+
	4124	+ wp_die();
	4125	+}
	4126	+
	4127	+private function mxchat_calculate_cosine_similarity($vectorA, $vectorB) {
	4128	+ if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) {
	4129	+ return 0;
	4130	+ }
	4131	+
	4132	+ $dotProduct = array_sum(array_map(function ($a, $b) {
	4133	+ return $a * $b;
	4134	+ }, $vectorA, $vectorB));
	4135	+ $normA = sqrt(array_sum(array_map(function ($a) {
	4136	+ return $a * $a;
	4137	+ }, $vectorA)));
	4138	+ $normB = sqrt(array_sum(array_map(function ($b) {
	4139	+ return $b * $b;
	4140	+ }, $vectorB)));
	4141	+
	4142	+ if ($normA == 0 || $normB == 0) {
	4143	+ return 0;
	4144	+ }
	4145	+
	4146	+ return $dotProduct / ($normA * $normB);
	4147	+ }
	4148	+
	4149	+public function mxchat_enqueue_scripts_styles() {
	4150	+ // Define version numbers for the styles and scripts
	4151	+ $chat_style_version = '2.1.5'; // Replace with your actual version
	4152	+ $chat_script_version = '2.1.5'; // Replace with your actual version
	4153	+
	4154	+ // Enqueue the script
	4155	+ wp_enqueue_script(
	4156	+ 'mxchat-chat-js',
	4157	+ plugin_dir_url(__FILE__) . '../js/chat-script.js',
	4158	+ array('jquery'),
	4159	+ $chat_script_version,
	4160	+ true
	4161	+ );
	4162	+
	4163	+ // Enqueue the CSS
	4164	+ wp_enqueue_style(
	4165	+ 'mxchat-chat-css',
	4166	+ plugin_dir_url(__FILE__) . '../css/chat-style.css',
	4167	+ array(),
	4168	+ $chat_style_version
	4169	+ );
	4170	+
	4171	+ // Fetch options from the database
	4172	+ $this->options = get_option('mxchat_options');
	4173	+ $prompts_options = get_option('mxchat_prompts_options', array());
	4174	+
	4175	+ // Prepare settings for JavaScript
	4176	+ $style_settings = array(
	4177	+ 'ajax_url' => admin_url('admin-ajax.php'),
	4178	+ 'nonce' => wp_create_nonce('mxchat_chat_nonce'),
	4179	+ 'link_target_toggle' => $this->options['link_target_toggle'] ?? 'off',
	4180	+ 'rate_limit_message' => $this->options['rate_limit_message'] ?? 'Rate limit exceeded. Please try again later.',
	4181	+ 'complianz_toggle' => isset($this->options['complianz_toggle']) && $this->options['complianz_toggle'] === 'on',
	4182	+ 'user_message_bg_color' => $this->options['user_message_bg_color'] ?? '#fff',
	4183	+ 'user_message_font_color' => $this->options['user_message_font_color'] ?? '#212121',
	4184	+ 'bot_message_bg_color' => $this->options['bot_message_bg_color'] ?? '#212121',
	4185	+ 'bot_message_font_color' => $this->options['bot_message_font_color'] ?? '#fff',
	4186	+ 'top_bar_bg_color' => $this->options['top_bar_bg_color'] ?? '#212121',
	4187	+ 'send_button_font_color' => $this->options['send_button_font_color'] ?? '#212121',
	4188	+ 'close_button_color' => $this->options['close_button_color'] ?? '#fff',
	4189	+ 'chatbot_background_color' => $this->options['chatbot_background_color'] ?? '#212121',
	4190	+ 'chatbot_bg_color' => $this->options['chatbot_bg_color'] ?? '#fff',
	4191	+ 'icon_color' => $this->options['icon_color'] ?? '#fff',
	4192	+ 'chat_input_font_color' => $this->options['chat_input_font_color'] ?? '#212121',
	4193	+ 'chat_persistence_toggle' => $this->options['chat_persistence_toggle'] ?? 'off',
	4194	+ 'appendWidgetToBody' => $this->options['append_to_body'] ?? 'off', // Example for consistency
	4195	+
	4196	+ 'live_agent_message_bg_color' => $this->options['live_agent_message_bg_color'] ?? '#ffffff',
	4197	+ 'live_agent_message_font_color' => $this->options['live_agent_message_font_color'] ?? '#333333',
	4198	+ 'chat_toolbar_toggle' => $this->options['chat_toolbar_toggle'] ?? 'off',
	4199	+ 'mode_indicator_bg_color' => $this->options['mode_indicator_bg_color'] ?? '#767676',
	4200	+ 'mode_indicator_font_color' => $this->options['mode_indicator_font_color'] ?? '#ffffff',
	4201	+ 'toolbar_icon_color' => $this->options['toolbar_icon_color'] ?? '#212121',
	4202	+
	4203	+ 'use_pinecone' => $prompts_options['mxchat_use_pinecone'] ?? '0',
	4204	+ 'pinecone_enabled' => isset($prompts_options['mxchat_use_pinecone']) && $prompts_options['mxchat_use_pinecone'] === '1'
	4205	+ );
	4206	+
	4207	+ // Pass the settings to the script
	4208	+ wp_localize_script('mxchat-chat-js', 'mxchatChat', $style_settings);
	4209	+}
	4210	+
	4211	+
	4212	+public function mxchat_reset_rate_limits() {
	4213	+ global $wpdb;
	4214	+
	4215	+ // Define a cache key pattern for rate limits
	4216	+ $cache_key_pattern = 'mxchat_chat_limit_%';
	4217	+
	4218	+ // Retrieve all option names matching the pattern
	4219	+ // phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.DirectDatabaseQuery.DirectQuery
	4220	+ $option_names = $wpdb->get_col("SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
	4221	+
	4222	+ // db call ok; no-cache ok
	4223	+ // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery -- db call ok
	4224	+ $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'");
	4225	+
	4226	+ // Clear the relevant cache entries
	4227	+ foreach ($option_names as $option_name) {
	4228	+ wp_cache_delete($option_name, 'options');
	4229	+ }
	4230	+
	4231	+ // Optionally, clear a general cache if you have one
	4232	+ wp_cache_delete('mxchat_all_chat_limits', 'options');
	4233	+ }
	4234	+
	4235	+private function mxchat_fetch_woocommerce_products() {
	4236	+ // Ensure WooCommerce is active
	4237	+ if (!class_exists('WooCommerce')) {
	4238	+ return [];
	4239	+ }
	4240	+
	4241	+ $args = array(
	4242	+ 'post_type' => 'product',
	4243	+ 'post_status' => 'publish',
	4244	+ 'posts_per_page' => -1,
	4245	+ );
	4246	+
	4247	+ $products = get_posts($args);
	4248	+ $product_data = [];
	4249	+
	4250	+ foreach ($products as $product) {
	4251	+ $product_id = $product->ID;
	4252	+ $product_obj = wc_get_product($product_id);
	4253	+
	4254	+ $product_data[] = array(
	4255	+ 'id' => $product_id,
	4256	+ 'name' => $product_obj->get_name(),
	4257	+ 'description' => $product_obj->get_description(),
	4258	+ 'short_description' => $product_obj->get_short_description(),
	4259	+ 'url' => get_permalink($product_id),
	4260	+ 'price' => $product_obj->get_regular_price(),
	4261	+ 'sale_price' => $product_obj->get_sale_price(),
	4262	+ 'stock_status' => $product_obj->get_stock_status(),
	4263	+ 'sku' => $product_obj->get_sku(),
	4264	+ 'in_stock' => $product_obj->is_in_stock(),
	4265	+ 'total_sales' => $product_obj->get_total_sales(),
	4266	+ );
	4267	+ }
	4268	+
	4269	+ return $product_data;
	4270	+}
	4271	+
	4272	+}
	4273	+?>