<?php
if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

class MxChat_Admin {
    private $options;
    private $chat_count;
    private $is_activated;

    public function __construct() {
        $this->options = get_option('mxchat_options');
        $this->chat_count = get_option('mxchat_chat_count', 0);
        $this->is_activated = $this->is_license_active();

        // Initialize default options if they are not set
        if (!$this->options) {
            $this->initialize_default_options();
        }

        // Add admin menu and initialize settings
        add_action('admin_menu', array($this, 'mxchat_add_plugin_page'));
        add_action('admin_init', array($this, 'mxchat_page_init'));
        add_action('admin_init', array($this, 'mxchat_prompts_page_init'));
        add_action('admin_enqueue_scripts', array($this, 'mxchat_enqueue_admin_assets'));
        add_action('wp_ajax_mxchat_delete_chat_history', array($this, 'mxchat_delete_chat_history'));
        add_action('admin_post_mxchat_submit_content', array($this, 'mxchat_handle_content_submission'));
        add_action('admin_post_mxchat_delete_prompt', array($this, 'mxchat_handle_delete_prompt'));
        add_action('wp_ajax_mxchat_fetch_chat_history', array($this, 'mxchat_fetch_chat_history'));
        add_action('wp_ajax_nopriv_mxchat_fetch_chat_history', array($this, 'mxchat_fetch_chat_history'));
        add_action('admin_post_mxchat_submit_sitemap', array($this, 'mxchat_handle_sitemap_submission'));
        add_action('wp_footer', array($this, 'mxchat_append_chatbot_to_body'));
        add_action('admin_head-mxchat-prompts', array($this, 'mxchat_enqueue_admin_assets'));
        add_action('admin_head-toplevel_page_mxchat-max', array($this, 'mxchat_enqueue_admin_assets'));
        add_action('wp_ajax_mxchat_activate_license', array($this, 'mxchat_handle_activate_license'));
        add_action('admin_notices', array($this, 'mxchat_display_admin_notice'));
        add_action('wp_ajax_mxchat_save_inline_prompt', array($this, 'mxchat_save_inline_prompt'));
        add_action('admin_post_mxchat_delete_all_prompts', array($this, 'mxchat_handle_delete_all_prompts'));
        add_action('admin_post_mxchat_add_intent', array($this, 'mxchat_handle_add_intent'));
        add_action('admin_post_mxchat_delete_intent', array($this, 'mxchat_handle_delete_intent'));
        add_action('admin_post_mxchat_update_intent_threshold', array($this, 'mxchat_handle_update_intent_threshold'));
        add_action('admin_post_mxchat_stop_processing', array($this, 'mxchat_stop_processing'));
        add_action('admin_post_mxchat_edit_intent', array($this, 'handle_edit_intent'));
        add_action('save_post', array($this, 'handle_post_update'), 10, 3);
        add_action('post_updated', array($this, 'handle_post_update'), 10, 3);
        add_action('wp_ajax_mxchat_save_setting', array($this, 'mxchat_save_setting_callback'));
        add_action('wp_trash_post', array($this, 'mxchat_handle_post_delete'));
        add_action('before_delete_post', array($this, 'mxchat_handle_post_delete'));
        add_action('wp_ajax_mxchat_export_transcripts', array($this, 'export_chat_transcripts'));
        add_action('wp_ajax_mxchat_save_prompts_setting', array($this, 'mxchat_save_prompts_setting_callback'));
        if (isset($this->options['enable_woocommerce_integration']) &&
            ($this->options['enable_woocommerce_integration'] === '1' ||
             $this->options['enable_woocommerce_integration'] === 'on')) {

            //error_log('MxChat Admin: WooCommerce integration is enabled, adding hooks');
            add_action('wp_insert_post', array($this, 'mxchat_handle_product_change'), 10, 3);
            add_action('wp_trash_post', array($this, 'mxchat_handle_product_delete'));
            add_action('before_delete_post', array($this, 'mxchat_handle_product_delete'));
        }
    }

    // Method to check if the license is active
private function is_license_active() {
        $license_status = get_option('mxchat_license_status', esc_html__('inactive', 'mxchat'));
        return $license_status === esc_html__('active', 'mxchat');
    }

    // Initialize default options
private function initialize_default_options() {
    $default_options = array(
        'api_key' => '',
        'xai_api_key' => '',
        'claude_api_key' => '',
        'deepseek_api_key' => '',
        'system_prompt_instructions' => esc_html__('[EXAMPLE INSTRUCTIONS] You are an AI Chatbot assistant for this website. The primary subject you should focus on is [insert proper subject here]. Your main goal is to assist visitors with questions related to this specific topic. Here are some key things to keep in mind:
        - Your name is [Chatbot Name].
        - Stay focused on topics related to [insert proper subject here]. If a visitor asks about an unrelated topic, politely redirect the conversation to how you can assist them with this subject.
        - Do not make up links to pages. Only use specific links you see in your knowledgebase from [insert your domain]. Do not make assumptions or make up URLs.
        - Keep your responses short, concise, and to the point. Provide clear and direct answers suitable for a chatbot interaction.
        - Provide answers based on the knowledge available to you. If you do not have an answer to a specific question, let the visitor know that you don’t have the information.', 'mxchat'),
        'model' => esc_html__('gpt-4o', 'mxchat'),
        'rate_limit_logged_out' => esc_html__('100', 'mxchat'),
        'role_rate_limits' => array(),
        'rate_limit_message' => esc_html__('Rate limit exceeded. Please try again later.', 'mxchat'),
        'enable_email_block' => '',
        'email_blocker_header_content' => esc_html__("<h2>Welcome to Our Chat!</h2>\n<p>Let's get started. Enter your email to begin chatting with us.</p>", 'mxchat'),
        'email_blocker_button_text' => esc_html__('Start Chat', 'mxchat'),
        'top_bar_title' => esc_html__('MxChat', 'mxchat'),
        'intro_message' => esc_html__('Hello! How can I assist you today?', 'mxchat'),
        'input_copy' => esc_html__('How can I assist?', 'mxchat'),
        'append_to_body' => esc_html__('off', 'mxchat'),
        'close_button_color' => esc_html__('#fff', 'mxchat'),
        'chatbot_bg_color' => esc_html__('#fff', 'mxchat'),
        'user_message_bg_color' => esc_html__('#fff', 'mxchat'),
        'user_message_font_color' => esc_html__('#212121', 'mxchat'),
        'bot_message_bg_color' => esc_html__('#212121', 'mxchat'),
        'bot_message_font_color' => esc_html__('#fff', 'mxchat'),
        'top_bar_bg_color' => esc_html__('#212121', 'mxchat'),
        'send_button_font_color' => esc_html__('#212121', 'mxchat'),
        'chat_input_font_color' => esc_html__('#212121', 'mxchat'),
        'chatbot_background_color' => esc_html__('#212121', 'mxchat'),
        'icon_color' => esc_html__('#fff', 'mxchat'),
        'enable_woocommerce_integration' => esc_html__('0', 'mxchat'),
        'link_target_toggle' => esc_html__('off', 'mxchat'),
        'pre_chat_message' => esc_html__('Hey there! Ask me anything!', 'mxchat'),

        // New fields for Loops Integration
        'loops_api_key' => '',
        'loops_mailing_list' => '',
        'triggered_phrase_response' => esc_html__('Would you like to join our mailing list? Please provide your email below.', 'mxchat'),
        'email_capture_response' => esc_html__('Thank you for providing your email! You\'ve been added to our list.', 'mxchat'),
        'popular_question_1' => '',
        'popular_question_2' => '',
        'popular_question_3' => '',
        'pdf_intent_trigger_text' => esc_html__("Please provide the URL to the PDF you'd like to discuss.", 'mxchat'),
        'pdf_intent_success_text' => esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat'),
        'pdf_intent_error_text' => esc_html__("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat'),
        'pdf_max_pages' => 69,

        // Live Agent Integration
        'live_agent_webhook_url' => '',
        'live_agent_secret_key' => '',
        'live_agent_bot_token' => '',
        'live_agent_message_bg_color' => esc_html__('#ffffff', 'mxchat'),
        'live_agent_message_font_color' => esc_html__('#333333', 'mxchat'),
        'chat_toolbar_toggle' => esc_html__('off', 'mxchat'),
        'mode_indicator_bg_color' => esc_html__('#767676', 'mxchat'),
        'mode_indicator_font_color' => esc_html__('#ffffff', 'mxchat'),
        'toolbar_icon_color' => esc_html__('#212121', 'mxchat'),
    );


        // Merge existing options with defaults
        $existing_options = get_option('mxchat_options', array());
        $merged_options = wp_parse_args($existing_options, $default_options);

        // Update the options if they have changed
        if ($existing_options !== $merged_options) {
            update_option('mxchat_options', $merged_options);
        }

            // Add default limits for each role
    $roles = wp_roles()->get_names();
    foreach ($roles as $role_id => $role_name) {
        $default_options['role_rate_limits'][$role_id] = esc_html__('100', 'mxchat');
    }

    return $default_options;

        // Update the $this->options property
        $this->options = $merged_options;
    }



public function mxchat_add_plugin_page() {
    // Main menu page
    add_menu_page(
        esc_html__('MxChat Settings', 'mxchat'),
        esc_html__('MxChat', 'mxchat'),
        'manage_options',
        'mxchat-max',
        array($this, 'mxchat_create_admin_page'),
        'dashicons-testimonial',
        6
    );

    // Submenu page for Knowledge
    add_submenu_page(
        'mxchat-max',
        esc_html__('Prompts', 'mxchat'),
        esc_html__('Knowledge', 'mxchat'),
        'manage_options',
        'mxchat-prompts',
        array($this, 'mxchat_create_prompts_page')
    );

    add_submenu_page(
        'mxchat-max',
        esc_html__('Chat Transcripts', 'mxchat'),
        esc_html__('Transcripts', 'mxchat'),
        'manage_options',
        'mxchat-transcripts',
        array($this, 'mxchat_create_transcripts_page')
    );

    add_submenu_page(
        'mxchat-max',  
        esc_html__('MxChat Intents', 'mxchat'),          
        esc_html__('Intents', 'mxchat'),                 
        'manage_options',          
        'mxchat-intents',            
        array($this, 'mxchat_intents_page_html') 
    );

        add_submenu_page(
            'mxchat-max',
            esc_html__('Add Ons', 'mxchat'),
            esc_html__('Add Ons', 'mxchat'),
            'manage_options',
            'mxchat-addons',
            array($this, 'mxchat_create_addons_page')
        );

    // Submenu page for Activation Key
    add_submenu_page(
        'mxchat-max',
        esc_html__('Pro Upgrade', 'mxchat'),
        esc_html__('Pro Upgrade', 'mxchat'),
        'manage_options',
        'mxchat-activation',
        array($this, 'mxchat_create_activation_page')
    );
}

public function mxchat_create_addons_page() {
    require_once plugin_dir_path(__FILE__) . 'class-mxchat-addons.php';
    $addons_page = new MxChat_Addons();
    $addons_page->render_page();
}

public function mxchat_save_setting_callback() {
    check_ajax_referer('mxchat_save_setting_nonce');
    if (!current_user_can('manage_options')) {
        wp_send_json_error(['message' => esc_html__('Unauthorized', 'mxchat')]);
    }
    $name = isset($_POST['name']) ? $_POST['name'] : '';
    // Strip slashes from the value before saving
    $value = isset($_POST['value']) ? stripslashes($_POST['value']) : '';
    if (empty($name)) {
        wp_send_json_error(['message' => esc_html__('Invalid field name', 'mxchat')]);
    }
    // Load the full options array
    $options = get_option('mxchat_options', []);
    // Handle special cases
    switch ($name) {
        case 'additional_popular_questions':
            $questions = json_decode($value, true); // No need for stripslashes here
            if (is_array($questions)) {
                $options[$name] = $questions;
                // Also update old option for backwards compatibility
                update_option('additional_popular_questions', $questions);
            }
            break;
        case 'user_message_bg_color':
        case 'user_message_font_color':
        case 'bot_message_bg_color':
        case 'bot_message_font_color':
        case 'top_bar_bg_color':
        case 'send_button_font_color':
        case 'chatbot_background_color':
        case 'icon_color':
        case 'chat_input_font_color':
        case 'live_agent_message_bg_color':
        case 'live_agent_message_font_color':
        case 'mode_indicator_bg_color':
        case 'mode_indicator_font_color':
        case 'toolbar_icon_color':
            // Store color values directly
            $options[$name] = $value;
            break;
        case 'live_agent_status':
            // Set the new value
            $options[$name] = ($value === 'on') ? 'on' : 'off';
            break;
        case 'enable_woocommerce_integration':
            // Handle values that used to be 1/0
            $options[$name] = ($value === 'on' || $value === '1') ? 'on' : 'off';
            break;
        default:
            // Handle role rate limits
            if (strpos($name, 'mxchat_options[role_rate_limits]') !== false) {
                // Extract role ID from the name
                preg_match('/\[role_rate_limits\]\[(.*?)\]/', $name, $matches);
                if (isset($matches[1])) {
                    $role_id = $matches[1];
                    // Initialize role_rate_limits if it doesn't exist
                    if (!isset($options['role_rate_limits'])) {
                        $options['role_rate_limits'] = [];
                    }
                    // Update the specific role's rate limit
                    $options['role_rate_limits'][$role_id] = sanitize_text_field($value);
                    break;
                }
            }
            // Handle toggles
            if (strpos($name, 'toggle') !== false || in_array($name, [
                'chat_persistence_toggle',
                'privacy_toggle',
                'complianz_toggle',
                'chat_toolbar_toggle'  // Removed live_agent_status from here
            ])) {
                $options[$name] = ($value === 'on') ? 'on' : 'off';
            } else {
                // Store all other values directly
                $options[$name] = $value;
            }
            break;
    }
    // Save all updates
    $updated = update_option('mxchat_options', $options);
    // Handle backwards compatibility for certain fields
    $legacy_fields = ['brave_api_key', 'brave_image_count', 'brave_safe_search', 'brave_news_count',
                     'brave_country', 'brave_language', 'similarity_threshold'];
    if (in_array($name, $legacy_fields)) {
        // Also update the individual option for backwards compatibility
        update_option($name, $value);
    }
    if ($updated) {
        wp_send_json_success(['message' => esc_html__('Setting saved', 'mxchat')]);
    } else {
        wp_send_json_error(['message' => esc_html__('Update failed or no changes', 'mxchat')]);
    }
}

/**
 * Handles AJAX auto-save for prompts and auto-sync settings.
 */
public function mxchat_save_prompts_setting_callback() {
    // Check the correct nonce for this action.
    check_ajax_referer( 'mxchat_prompts_setting_nonce', '_ajax_nonce' );

    if ( ! current_user_can( 'manage_options' ) ) {
        wp_send_json_error( [ 'message' => esc_html__( 'Unauthorized', 'mxchat' ) ] );
    }

    $name  = isset( $_POST['name'] ) ? sanitize_text_field( wp_unslash( $_POST['name'] ) ) : '';
    $value = isset( $_POST['value'] ) ? sanitize_text_field( wp_unslash( $_POST['value'] ) ) : '';

    if ( empty( $name ) ) {
        wp_send_json_error( [ 'message' => esc_html__( 'Invalid field name', 'mxchat' ) ] );
    }

    // Handle standalone auto-sync settings.
    if ( in_array( $name, [ 'mxchat_auto_sync_posts', 'mxchat_auto_sync_pages' ], true ) ) {
        // Convert checkbox value to "1" if checked, "0" if not.
        $value = ( $value === 'on' ) ? '1' : '0';
        update_option( $name, $value );
        wp_send_json_success( [ 'message' => esc_html__( 'Setting saved', 'mxchat' ) ] );
    }

    // Handle fields stored in the 'mxchat_prompts_options' array.
// Handle fields stored in the 'mxchat_prompts_options' array.
if ( false !== strpos( $name, 'mxchat_prompts_options[' ) ) {
    // Extract the key name using regex.
    if ( preg_match( '/mxchat_prompts_options\[(.*?)\]/', $name, $matches ) && ! empty( $matches[1] ) ) {
        $key = sanitize_text_field( $matches[1] );
        $options = get_option( 'mxchat_prompts_options', [] );

        // Remove Pinecone-specific settings from the main plugin handling.
        if ( 'mxchat_use_pinecone' === $key ) {
            // Optionally, you could simply ignore this field or set a default value.
            // For example, ensure it's always 0 or remove it entirely:
            // $options[ $key ] = '0';
            // Or, if you prefer, just return an error so that the main plugin doesn't handle it:
            wp_send_json_error( [ 'message' => esc_html__( 'Pinecone settings are now handled in the add-on.', 'mxchat' ) ] );
        } else {
            // For all other fields, use the existing logic.
            $options[ $key ] = ( $value === 'on' || $value === '1' ) ? '1' : $value;
        }
        update_option( 'mxchat_prompts_options', $options );
        wp_send_json_success( [ 'message' => esc_html__( 'Setting saved', 'mxchat' ) ] );
    }
}


    wp_send_json_error( [ 'message' => esc_html__( 'Field not recognized', 'mxchat' ) ] );
}

public function mxchat_display_admin_notice() {
    // Success notice
    if ($message = get_transient('mxchat_admin_notice_success')) {
        ?>
        <div class="notice notice-success is-dismissible">
            <p><?php echo esc_html($message); ?></p>
            <button type="button" class="notice-dismiss"><span class="screen-reader-text"><?php echo esc_html__('Dismiss this notice.', 'mxchat'); ?></span></button>
        </div>
        <?php
        delete_transient('mxchat_admin_notice_success'); // Clear the transient after displaying
    }

    // Error notice
    if ($message = get_transient('mxchat_admin_notice_error')) {
        ?>
        <div class="notice notice-error is-dismissible">
            <p><?php echo esc_html($message); ?></p>
            <button type="button" class="notice-dismiss"><span class="screen-reader-text"><?php echo esc_html__('Dismiss this notice.', 'mxchat'); ?></span></button>
        </div>
        <?php
        delete_transient('mxchat_admin_notice_error'); // Clear the transient after displaying
    }
}





public function mxchat_create_admin_page() {

    ?>
    <div class="wrap mxchat-admin">
        <?php if (!$this->is_activated): ?>
        <div class="mxchat-pro-banner">
          <p>
              <?php echo esc_html__('For a limited time, get lifetime access and save $20 on MxChat Pro!', 'mxchat'); ?>
              <a href="https://mxchat.ai/" target="_blank"><?php echo esc_html__('Upgrade to Pro today', 'mxchat'); ?></a>
          </p>
        </div>
        <?php endif; ?>

        <div class="mxchat-agents-banner">
          <p>
        <strong><?php echo esc_html__('The MxChat Add-Ons Platform', 'mxchat'); ?></strong><?php echo esc_html__(' is here! Pro users get unlimited access to our growing collection of powerful add-ons. ', 'mxchat'); ?><a href="<?php echo admin_url('admin.php?page=mxchat-addons'); ?>"><?php echo esc_html__('Explore all add-ons', 'mxchat'); ?></a><?php echo esc_html__(' including Forms Builder, Theme Customizer, Content Moderation, and more – all included with your lifetime Pro license!', 'mxchat'); ?>
        </p>
        </div>

        <h2 class="mxchat-nav-tab-wrapper">
            <a href="#chatbot" class="mxchat-nav-tab mxchat-nav-tab-active" data-tab="chatbot"><?php echo esc_html__('Chatbot', 'mxchat'); ?></a>
            <a href="#embed" class="mxchat-nav-tab" data-tab="embed"><?php echo esc_html__('Integrations', 'mxchat'); ?></a>
            <a href="#general" class="mxchat-nav-tab" data-tab="general"><?php echo esc_html__('FAQ', 'mxchat'); ?></a>
        </h2>

        <div id="chatbot" class="mxchat-tab-content active">
            <div class="mxchat-autosave-section">
                <?php do_settings_sections('mxchat-chatbot'); ?>
            </div>
        </div>

        <div id="embed" class="mxchat-tab-content">
            <div class="mxchat-autosave-section">

                <div class="mxchat-settings-section">
                    <h2><?php echo esc_html__('Loops Settings', 'mxchat'); ?></h2>
                    <table class="form-table">
                        <?php do_settings_fields('mxchat-embed', 'mxchat_loops_section'); ?>
                    </table>
                </div>

                <div class="section-divider"></div>

                <div class="mxchat-settings-section">
                    <h2><?php echo esc_html__('Brave Search Settings', 'mxchat'); ?></h2>
                    <table class="form-table">
                        <?php do_settings_fields('mxchat-embed', 'mxchat_brave_section'); ?>
                    </table>
                </div>

                <div class="section-divider"></div>

                <div class="mxchat-settings-section">
                    <h2><?php echo esc_html__('Toolbar Settings & Intents', 'mxchat'); ?></h2>
                    <table class="form-table">
                        <?php do_settings_fields('mxchat-embed', 'mxchat_pdf_intent_section'); ?>
                    </table>
                </div>

                <div class="section-divider"></div>

                <!-- Live Agent Settings Section -->
                <div class="mxchat-settings-section">
                    <h2><?php echo esc_html__('Live Agent Settings', 'mxchat'); ?></h2>
                    <p><?php echo esc_html__('Visit our', 'mxchat'); ?> <a href="https://mxchat.ai/documentation/#slack_integration" target="_blank"><?php echo esc_html__('documentation page', 'mxchat'); ?></a> <?php echo esc_html__('to set up live agent transfer via Slack.', 'mxchat'); ?></p>
                    <table class="form-table">
                        <?php do_settings_fields('mxchat-embed', 'mxchat_live_agent_section'); ?>
                    </table>
                </div>
            </div>
        </div>


        <div id="general" class="mxchat-tab-content">
            <?php do_settings_sections('mxchat-general'); ?>
            <p>
                <?php echo esc_html__('If you’re having trouble with setup or getting the responses you need, we encourage you to review our', 'mxchat'); ?>
                <a href="https://mxchat.ai/documentation/" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('documentation', 'mxchat'); ?></a> <?php echo esc_html__('or', 'mxchat'); ?>
                <a href="https://wordpress.org/support/plugin/mxchat-basic/" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('create a support ticket', 'mxchat'); ?></a>.
            </p>
            <p>
                <?php echo esc_html__('If you like our plugin, please consider', 'mxchat'); ?> <a href="https://wordpress.org/plugins/mxchat-basic/#reviews" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('leaving us a review', 'mxchat'); ?></a>.
            </p>

            <div class="faq-item">
                <h3><?php echo esc_html__('How does the Claude API integration work?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('The Claude API, provided by Anthropic, allows for intelligent, context-aware chatbot responses in MxChat. To use it, you will need both an OpenAI API key and a Claude API key. This is necessary because the system utilizes OpenAI for vector embedding in the Retrieval-Augmented Generation (RAG) process, as Claude does not currently offer an embedding API.', 'mxchat'); ?>
                </p>
                <p>
                    <?php echo esc_html__('When using the Claude API, your custom content is sent to Claude for generating responses, while the embeddings are processed through OpenAI. This ensures your chatbot provides accurate and engaging responses while maintaining knowledge relevant to your website.', 'mxchat'); ?>
                </p>
                <p>
                    <?php echo esc_html__('You can obtain your Claude API key by signing up on the', 'mxchat'); ?> <a href="https://www.anthropic.com/api" target="_blank" rel="noopener"><?php echo esc_html__('Anthropic API page', 'mxchat'); ?></a>.
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How does the X.AI API integration work?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('The X.AI API, released on 10.21.24, is currently in beta. To use it, you will need both an OpenAI API key and an X.AI API key. This is because OpenAI handles vector embeddings in the Retrieval-Augmented Generation (RAG) process, as X.AI does not yet provide an embedding API.', 'mxchat'); ?>
                </p>
                <p>
                    <?php echo esc_html__('Custom content is sent to the X.AI API for generating responses, while OpenAI processes the embeddings. This allows the chatbot to provide advanced responses while maintaining context from your website. You can get your X.AI API key from the', 'mxchat'); ?> <a href="https://docs.x.ai/docs" target="_blank" rel="noopener"><?php echo esc_html__('X.AI API documentation', 'mxchat'); ?></a>.
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('Do I need an OpenAI API key to use the chatbot?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('Yes, you will need an OpenAI API key to power the chatbot. You can obtain an API key by signing up on the', 'mxchat'); ?> <a href="https://platform.openai.com/signup" target="_blank" rel="noopener"><?php echo esc_html__('OpenAI platform', 'mxchat'); ?></a>. <?php echo esc_html__('After signing up, you must add credits to your account—typically, $5 in credits is sufficient to get started.', 'mxchat'); ?>
                </p>
                <p>
                    <?php echo esc_html__('Once you have your API key, simply enter it in the chatbot\'s settings to enable functionality. The chatbot relies on OpenAI’s models for generating responses, so having sufficient credits in your OpenAI account is essential for smooth operation.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How do I add the chatbot to my site?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('You can add the chatbot using the shortcode', 'mxchat'); ?> <code>[mxchat_chatbot floating="yes"]</code> <?php echo esc_html__('or', 'mxchat'); ?> <code>[mxchat_chatbot floating="no"]</code>. <?php echo esc_html__('For initial testing and styling, it\'s best to use the shortcode on a draft or non-public page. Once you’re ready to go live, enable the “Append Chat Widget to Body” option in the settings for site-wide integration (recommended) or add shortcode to the footer.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How does the chatbot use my content to generate responses?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('The chatbot uses AI and vector embeddings to connect users with relevant information. When you submit content, it converts it into a mathematical format. When a user asks a question, the bot matches it to your stored content and generates a response based on relevance. For example, submitting "Our phone number is 910-123-4567" allows the bot to retrieve this information when asked about contact details. To ensure related information is provided together, submit it in one entry.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('Why does the chatbot sometimes make up links or information?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('Occasionally, the chatbot may generate inaccurate links or information, known as "hallucinations." To minimize this, you can add system instructions to guide its behavior. For example, include an instruction like: "Only provide links you directly have access to or retrieve from the knowledge base. Do not make up links or information that you do not have direct access to." This helps the bot stay aligned with your content.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How do intents work in MxChat?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('Intents allow MxChat to recognize user requests and trigger specific actions, such as capturing emails or displaying product information. This helps provide a more interactive and responsive experience. For a detailed explanation of each intent, please refer to our', 'mxchat'); ?> <a href="https://mxchat.ai/documentation/#intents" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('Intents Documentation', 'mxchat'); ?></a>.
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How does the Complianz integration work?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('The Pro version offers direct integration with the Complianz GDPR plugin, making it easy to stay compliant with GDPR. If Complianz is enabled on your website, users must accept consent before the chatbot widget appears. The chatbot will only display once the user has accepted, ensuring compliance with data privacy regulations.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('How does the WooCommerce integration work?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('With WooCommerce integration, the chatbot automatically embeds new products and updates existing ones. For already-published products, you can click update or submit the product sitemap. The “Order History Access” setting allows the bot to access users\' order history (requires login) and assist with order inquiries. To enable the “Add to Cart” feature, add this system instruction: “After discussing a product, ask if the user wants to add it to their cart. The user must say \'Add to cart\' exactly.” Currently, this feature supports English only, with more languages coming soon.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('Why isn\'t my chatbot responding as expected?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('AI chatbots can sometimes behave in unexpected ways, especially if you\'re new to configuring AI for specific tasks. We\'re committed to helping you get the most out of your chatbot experience. While we’re working on comprehensive guides and video tutorials, our team is here to assist you directly. If your chatbot isn\'t delivering the responses you need, please don’t hesitate to', 'mxchat'); ?> <a href="https://mxchat.ai/contact/" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('contact us', 'mxchat'); ?></a> <?php echo esc_html__('for personalized support.', 'mxchat'); ?>
                </p>
                <p>
                    <?php echo esc_html__('We’re dedicated to your success and ready to guide you in aligning the AI\'s behavior to meet your goals.', 'mxchat'); ?>
                </p>
            </div>

            <div class="faq-item">
                <h3><?php echo esc_html__('What is Loops, and how do I get an API key?', 'mxchat'); ?></h3>
                <p>
                    <?php echo esc_html__('Loops is a powerful SaaS email service that helps you automate and enhance your email marketing campaigns, making it easy to reach and engage with your audience. To integrate Loops with MxChat, you’ll need an API key from Loops. You can obtain this key by logging into your Loops account and navigating to the API settings. Visit the', 'mxchat'); ?> <a href="https://loops.so" target="_blank" rel="noopener noreferrer"><?php echo esc_html__('Loops website', 'mxchat'); ?></a> <?php echo esc_html__('to get started or to sign up for an account.', 'mxchat'); ?>
                </p>
            </div>

        </div>
    </div>
    <?php
}


public function mxchat_create_transcripts_page() {
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
    
    // Get basic stats
    $total_chats = $wpdb->get_var("SELECT COUNT(DISTINCT session_id) FROM $table_name");
    $total_messages = $wpdb->get_var("SELECT COUNT(*) FROM $table_name");
    
    // Count unique users with detailed breakdown
    $total_users = $wpdb->get_var("
        SELECT COUNT(DISTINCT 
            CASE 
                WHEN user_email != '' AND user_email IS NOT NULL THEN user_email
                WHEN user_id != 0 THEN CONCAT('user_', user_id)
                WHEN user_identifier NOT LIKE 'Tech-Savvy User' 
                     AND user_identifier NOT LIKE 'Detail-Oriented User'
                     AND user_identifier NOT LIKE 'Language Learner'
                     AND user_identifier NOT LIKE 'Casual Browser'
                     AND user_identifier NOT LIKE 'Policy Enforcer'
                     AND user_identifier NOT LIKE 'Researcher'
                     AND user_identifier NOT LIKE 'Loyalty Member'
                     AND user_identifier NOT LIKE 'Gift Buyer'
                     AND user_identifier NOT LIKE 'Parent or Caregiver'
                THEN user_identifier
                ELSE session_id 
            END
        ) 
        FROM $table_name
        WHERE role != 'assistant'
    ");

    // Get user type breakdown
    $registered_users = $wpdb->get_var("
        SELECT COUNT(DISTINCT user_email) 
        FROM $table_name 
        WHERE user_email != '' AND user_email IS NOT NULL
    ");

    $guest_users = $wpdb->get_var("
        SELECT COUNT(DISTINCT user_identifier) 
        FROM $table_name 
        WHERE (user_email = '' OR user_email IS NULL)
        AND role != 'assistant'
        AND user_identifier NOT LIKE 'Tech-Savvy User'
        AND user_identifier NOT LIKE 'Detail-Oriented User'
        AND user_identifier NOT LIKE 'Language Learner'
        AND user_identifier NOT LIKE 'Casual Browser'
        AND user_identifier NOT LIKE 'Policy Enforcer'
        AND user_identifier NOT LIKE 'Researcher'
        AND user_identifier NOT LIKE 'Loyalty Member'
        AND user_identifier NOT LIKE 'Gift Buyer'
        AND user_identifier NOT LIKE 'Parent or Caregiver'
    ");

    // Get agent test messages count
    $agent_tests = $wpdb->get_var("
        SELECT COUNT(DISTINCT session_id) 
        FROM $table_name 
        WHERE user_identifier IN (
            'Tech-Savvy User',
            'Detail-Oriented User',
            'Language Learner',
            'Casual Browser',
            'Policy Enforcer',
            'Researcher',
            'Loyalty Member',
            'Gift Buyer',
            'Parent or Caregiver'
        )
    ");
    ?>
    <div class="wrap mxchat-transcripts-wrapper">
        <!-- Hero Section -->
        <div class="mxchat-transcripts-hero">
            <h1 class="mxchat-main-title">
                Chat <span class="mxchat-gradient-text">Transcripts</span>
            </h1>
            <p class="mxchat-hero-subtitle">
                <?php esc_html_e('Review and manage your chatbot conversations with detailed message history.', 'mxchat'); ?>
            </p>
        </div>
        <div class="mxchat-content">
            <!-- Stats Cards -->
            <div class="mxchat-stats-grid">
                <div class="mxchat-stat-card">
                    <div class="stat-icon">💬</div>
                    <div class="stat-content">
                        <span class="stat-value"><?php echo esc_html($total_chats); ?></span>
                        <span class="stat-label"><?php esc_html_e('Total Chats', 'mxchat'); ?></span>
                    </div>
                </div>
                <div class="mxchat-stat-card">
                    <div class="stat-icon">📝</div>
                    <div class="stat-content">
                        <span class="stat-value"><?php echo esc_html($total_messages); ?></span>
                        <span class="stat-label"><?php esc_html_e('Total Messages', 'mxchat'); ?></span>
                    </div>
                </div>
                <div class="mxchat-stat-card">
                    <div class="stat-icon">👥</div>
                    <div class="stat-content">
                        <span class="stat-value"><?php echo esc_html($total_users); ?></span>
                        <span class="stat-label"><?php esc_html_e('Unique Users', 'mxchat'); ?></span>
                        <span class="stat-sublabel">
                            <?php 
                            echo sprintf(
                                esc_html__('%d registered, %d guests, %d agent tests', 'mxchat'),
                                $registered_users,
                                $guest_users,
                                $agent_tests
                            ); 
                            ?>
                        </span>
                    </div>
                </div>
            </div>
            <!-- Search and Filter Controls -->
            <div class="mxchat-controls-wrapper">
                <div class="mxchat-search-box">
                    <input type="text" id="mxchat-search-transcripts"
                           placeholder="<?php esc_attr_e('Search transcripts...', 'mxchat'); ?>"
                           class="regular-text">
                </div>
                <form id="mxchat-delete-form" method="post">
                    <?php wp_nonce_field('mxchat_delete_chat_history', 'mxchat_delete_chat_nonce'); ?>
                    <div class="mxchat-controls">
                        <button type="button" id="mxchat-export-transcripts" class="mxchat-action-button">
                            <span class="dashicons dashicons-download"></span>
                            <?php esc_html_e('Export All Chats', 'mxchat'); ?>
                        </button>
                        <button type="button" id="mxchat-select-all-transcripts" class="mxchat-select-button">
                            <span class="dashicons dashicons-yes-alt"></span>
                            <span class="button-text"><?php esc_html_e('Select All', 'mxchat'); ?></span>
                        </button>
                        <button type="submit" class="button delete-chats-button">
                            <span class="dashicons dashicons-trash"></span>
                            <?php esc_html_e('Delete Selected', 'mxchat'); ?>
                        </button>
                    </div>
                </form>
            </div>
            <!-- Transcripts Container -->
            <div id="mxchat-transcripts"></div>
        </div>
    </div>
    <?php
}

public function export_chat_transcripts() {
    if (!current_user_can('manage_options')) {
        wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'mxchat'));
    }

    check_ajax_referer('mxchat_export_transcripts', 'security');

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';

    // Get all transcripts ordered by session and timestamp
    $results = $wpdb->get_results(
        "SELECT session_id, user_email, user_identifier, role, message, timestamp 
        FROM {$table_name} 
        ORDER BY session_id, timestamp ASC"
    );

    if (empty($results)) {
        wp_send_json_error(array('message' => 'No transcripts found.'));
        wp_die();
    }

    // Set headers for CSV download
    header('Content-Type: text/csv');
    header('Content-Disposition: attachment; filename="chat-transcripts-' . date('Y-m-d') . '.csv"');
    header('Pragma: no-cache');
    header('Expires: 0');

    // Create output stream
    $output = fopen('php://output', 'w');

    // Add UTF-8 BOM for proper Excel encoding
    fputs($output, "\xEF\xBB\xBF");

    // Add CSV headers
    fputcsv($output, array(
        'Session ID',
        'Email',
        'User Identifier',
        'Role',
        'Message',
        'Timestamp'
    ));

    // Add data rows
    foreach ($results as $row) {
        fputcsv($output, array(
            $row->session_id,
            $row->user_email,
            $row->user_identifier,
            $row->role,
            $row->message,
            $row->timestamp
        ));
    }

    fclose($output);
    wp_die();
}

public function mxchat_fetch_chat_history() {
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';

    if (!current_user_can('manage_options')) {
        wp_die(esc_html__('You do not have sufficient permissions to view this page.', 'mxchat'));
    }

    // First get unique session IDs ordered by most recent message in each session
    $session_ids = $wpdb->get_col(
        $wpdb->prepare(
            "SELECT DISTINCT session_id
            FROM {$table_name}
            GROUP BY session_id
            ORDER BY MAX(timestamp) DESC"
        )
    );

    if (empty($session_ids)) {
        wp_die(esc_html__('No chat history available.', 'mxchat'));
    }

    ob_start();
    echo '<div class="mxchat-transcript">';

    // Iterate through sessions from newest to oldest
    foreach ($session_ids as $session_id) {
        // Get the email associated with this session (if available)
        $email = $wpdb->get_var(
            $wpdb->prepare(
                "SELECT user_email
                FROM {$table_name}
                WHERE session_id = %s AND user_email != ''
                ORDER BY timestamp ASC
                LIMIT 1",
                $session_id
            )
        );

        // Debug: Check email retrieval
        if (empty($email)) {
            //error_log("No email found for session {$session_id}");
        } else {
            //error_log("Email for session {$session_id}: " . $email);
        }

        // Get messages for this session ordered by timestamp
        $messages = $wpdb->get_results(
            $wpdb->prepare(
                "SELECT * FROM {$table_name}
                WHERE session_id = %s
                ORDER BY timestamp ASC",
                $session_id
            )
        );

        // Start session block
        echo '<div class="mxchat-session">';
        echo '<div class="mxchat-session-header">';
        // Wrap checkbox and session ID in one block
        echo '<div class="mxchat-session-id">';
        echo '<input type="checkbox" name="delete_session_ids[]" value="' . esc_attr($session_id) . '"> ';
        echo '<strong>' . esc_html__('Session ID:', 'mxchat') . '</strong> ' . esc_html($session_id);
        echo '</div>';

        // Place email directly below the session ID block
        if (!empty($email)) {
            echo '<div class="mxchat-session-email">';
            echo '<strong>' . esc_html__('Email:', 'mxchat') . '</strong> ' . esc_html($email);
            echo '</div>';
        }
        echo '</div>';

        echo '<div class="mxchat-messages">';

        // Display messages for this session
        foreach ($messages as $transcript) {
            $formatted_timestamp = date_i18n('F j, Y g:i a', strtotime($transcript->timestamp));

            // Determine message styling
            switch ($transcript->role) {
                case 'assistant':
                case 'bot':
                    $message_class = 'bot-message';
                    $display_role = esc_html__('Chatbot', 'mxchat');
                    break;
                case 'user':
                    $message_class = 'user-message';
                    $display_role = !empty($transcript->user_identifier)
                        ? sanitize_text_field($transcript->user_identifier)
                        : esc_html__('User', 'mxchat');
                    break;
                case 'agent':
                    $message_class = 'agent-message';
                    $display_role = esc_html__('Agent', 'mxchat');
                    break;
                default:
                    $message_class = 'unknown-message';
                    $display_role = esc_html__('Unknown', 'mxchat');
            }

            // Process message content
            $message_content = wp_kses(
                stripslashes($transcript->message),
                [
                    'b' => [], 'strong' => [], 'i' => [], 'em' => [], 'u' => [],
                    'br' => [], 'p' => [], 'ul' => [], 'ol' => [], 'li' => [],
                    'a' => ['href' => [], 'title' => []]
                ]
            );
            $message_content = nl2br($message_content);

            // Render message
            echo '<div class="mxchat-message ' . esc_attr($message_class) . '">';
            echo '<div class="mxchat-message-header">' . esc_html($display_role) . '</div>';
            echo '<div class="mxchat-message-content">' . $message_content . '</div>';
            echo '<div class="mxchat-timestamp">' . esc_html($formatted_timestamp) . '</div>';
            echo '</div>';
        }

        // Close session block
        echo '</div></div>';
    }

    echo '</div>';
    $output = ob_get_clean();
    echo $output;
    wp_die();
}



public function mxchat_create_prompts_page() {
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    // Display success message if all prompts were deleted
    if (isset($_GET['all_deleted']) && $_GET['all_deleted'] === 'true') {
        echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__('All knowledge has been deleted successfully.', 'mxchat') . '</p></div>';
    }

    // Set up pagination and search query
    $nonce = isset($_GET['_wpnonce']) ? sanitize_text_field($_GET['_wpnonce']) : '';
    $search_query = (!empty($nonce) && wp_verify_nonce($nonce, 'mxchat_prompts_search_nonce') && isset($_GET['search'])) ? sanitize_text_field($_GET['search']) : '';
    $current_page = isset($_GET['paged']) ? absint($_GET['paged']) : 1;
    $per_page = 10;
    $offset = ($current_page - 1) * $per_page;

    // Modify query to handle search input
    $sql_search = "";
    if ($search_query) {
        $sql_search = $wpdb->prepare("WHERE article_content LIKE %s", '%' . $wpdb->esc_like($search_query) . '%');
    }

    // Retrieve total number of prompts, considering search filter
    $total_prompts = $wpdb->get_var("SELECT COUNT(*) FROM {$table_name} {$sql_search}");
    $total_pages = ceil($total_prompts / $per_page);

    // Retrieve prompts from the database
    $prompts = $wpdb->get_results(
        $wpdb->prepare(
            "SELECT * FROM {$table_name} {$sql_search} ORDER BY timestamp DESC LIMIT %d OFFSET %d",
            $per_page,
            $offset
        )
    );

    // Add the pagination links generation here
    $page_links = paginate_links(array(
        'base'      => add_query_arg(array(
            'paged' => '%#%',
            'search' => urlencode($search_query),
            '_wpnonce' => wp_create_nonce('mxchat_prompts_search_nonce')
        ), admin_url('admin.php?page=mxchat-prompts')),
        'format'    => '',
        'prev_text' => __('&laquo; Previous', 'mxchat'),
        'next_text' => __('Next &raquo;', 'mxchat'),
        'total'     => $total_pages,
        'current'   => $current_page,
    ));

    // Retrieve processing statuses
    $pdf_url     = get_transient('mxchat_last_pdf_url');
    $sitemap_url = get_transient('mxchat_last_sitemap_url');
    $pdf_status  = $pdf_url ? $this->get_pdf_processing_status($pdf_url) : false;
    $sitemap_status = $sitemap_url ? $this->get_sitemap_processing_status($sitemap_url) : false;

    if ($pdf_status && $pdf_status['status'] === 'complete') {
        delete_transient('mxchat_last_pdf_url');
        $pdf_status = false;
    }
    if ($sitemap_status && $sitemap_status['status'] === 'complete') {
        delete_transient('mxchat_last_sitemap_url');
        $sitemap_status = false;
    }

    $is_processing = ($pdf_status && ($pdf_status['status'] === 'processing' || $pdf_status['status'] === 'error'))
                   || ($sitemap_status && ($sitemap_status['status'] === 'processing' || $sitemap_status['status'] === 'error'));
    ?>
    <div class="wrap mxchat-wrapper">
        <!-- Hero Section -->
        <div class="mxchat-hero">
            <h1 class="mxchat-main-title">
                <span class="mxchat-gradient-text">Knowledge Base</span> Manager
            </h1>
            <p class="mxchat-hero-subtitle">
                <?php esc_html_e('Enhance your AI chatbot with custom knowledge. Import, manage, and organize your content to keep responses accurate and relevant.', 'mxchat'); ?>
            </p>
        </div>

        <div class="mxchat-content">
            <!-- Import Settings Card -->
            <div class="mxchat-card">
                <h2><?php esc_html_e('Knowledge Import Settings', 'mxchat'); ?></h2>
                    <p><?php esc_html_e('Using the free Pinecone DB Manager add-on is recommended for high performance and a knowledge database of more than 500.', 'mxchat'); ?></p>

                <!-- Tab Contents -->
                <div class="mxchat-tab-contents">
                    <!-- Default Database Tab -->
                    <div id="default-db" class="mxchat-tab-content active">
                    <!-- Auto-Sync Settings -->
                    <div class="mxchat-settings-section">
                        <h3><?php esc_html_e('Auto-Sync Settings', 'mxchat'); ?></h3>
                        <p class="mxchat-description">
                            <?php esc_html_e('Note: Auto-sync works only for newly published content. Existing posts and pages must be imported manually below. Works with Pinecone if enabled', 'mxchat'); ?>
                        </p>
                        <div class="mxchat-autosave-section"> <!-- Add this wrapper -->
                            <div class="mxchat-toggle-group">
                                <div class="mxchat-toggle-container">
                                    <label class="mxchat-toggle-switch">
                                        <input type="checkbox"
                                               name="mxchat_auto_sync_posts"
                                               class="mxchat-autosave-field"
                                               value="1"
                                               data-nonce="<?php echo wp_create_nonce('mxchat_prompts_setting_nonce'); ?>"
                                               <?php checked(get_option('mxchat_auto_sync_posts', '0'), '1'); ?>>
                                        <span class="mxchat-toggle-slider"></span>
                                    </label>
                                    <span class="mxchat-toggle-label">
                                        <?php esc_html_e('Auto-sync Posts', 'mxchat'); ?>
                                    </span>
                                </div>
                                <div class="mxchat-toggle-container">
                                    <label class="mxchat-toggle-switch">
                                        <input type="checkbox"
                                               name="mxchat_auto_sync_pages"
                                               class="mxchat-autosave-field"
                                               value="1"
                                               data-nonce="<?php echo wp_create_nonce('mxchat_prompts_setting_nonce'); ?>"
                                               <?php checked(get_option('mxchat_auto_sync_pages', '0'), '1'); ?>>
                                        <span class="mxchat-toggle-slider"></span>
                                    </label>
                                    <span class="mxchat-toggle-label">
                                        <?php esc_html_e('Auto-sync Pages', 'mxchat'); ?>
                                    </span>
                                </div>
                            </div>
                        </div>
                    </div>

                        <!-- Import Methods -->
                        <div class="mxchat-import-methods">
                            <div class="mxchat-method-card">
                                <h4><?php esc_html_e('Sitemap Import', 'mxchat'); ?></h4>
                                    <p><?php esc_html_e('Import all content from your sitemap automatically. Use a content-specific sub-sitemap, not the sitemap index.', 'mxchat'); ?></p>
                            </div>
                            <div class="mxchat-method-card">
                                <h4><?php esc_html_e('PDF Import', 'mxchat'); ?></h4>
                                <p><?php esc_html_e('Import knowledge directly from PDF documents.', 'mxchat'); ?></p>
                            </div>
                            <div class="mxchat-method-card">
                                <h4><?php esc_html_e('Direct URL', 'mxchat'); ?></h4>
                                <p><?php esc_html_e('Import content from any specific webpage.', 'mxchat'); ?></p>
                            </div>
                            <div class="mxchat-method-card">
                                <h4><?php esc_html_e('Direct Content', 'mxchat'); ?></h4>
                                <p><?php esc_html_e('Directly submit content to be vectorized.', 'mxchat'); ?></p>
                            </div>
                        </div>

                        <!-- Import Form -->
                        <?php if (!$is_processing) : ?>
                            <div class="mxchat-import-form">
                                <form id="mxchat-sitemap-form" method="post"
                                      action="<?php echo esc_url(admin_url('admin-post.php?action=mxchat_submit_sitemap')); ?>">
                                    <?php wp_nonce_field('mxchat_submit_sitemap_action', 'mxchat_submit_sitemap_nonce'); ?>
                                    <div class="mxchat-url-input-group">
                                        <input type="url"
                                               name="sitemap_url"
                                               id="sitemap_url"
                                               placeholder="<?php esc_attr_e('Enter Sitemap, PDF, or Webpage URL', 'mxchat'); ?>"
                                               required />
                                        <button type="submit"
                                                name="submit_sitemap"
                                                class="mxchat-button-primary">
                                            <?php esc_html_e('Import', 'mxchat'); ?>
                                        </button>
                                    </div>
                                </form>
                            </div>
                        <?php endif; ?>

                        <!-- Processing Status -->
                        <?php if ($pdf_status && $pdf_status['status'] !== 'complete') : ?>
                            <div class="mxchat-status-card">
                                <div class="mxchat-status-header">
                                    <h4><?php esc_html_e('PDF Processing Status', 'mxchat'); ?></h4>
                                    <?php if ($is_processing) : ?>
                                        <form method="post" class="mxchat-stop-form"
                                              action="<?php echo esc_url(admin_url('admin-post.php?action=mxchat_stop_processing')); ?>">
                                            <?php wp_nonce_field('mxchat_stop_processing_action', 'mxchat_stop_processing_nonce'); ?>
                                            <button type="submit" name="stop_processing" class="mxchat-button-secondary">
                                                <?php esc_html_e('Stop Processing', 'mxchat'); ?>
                                            </button>
                                        </form>
                                    <?php endif; ?>
                                </div>
                                <div class="mxchat-progress-bar">
                                    <div class="mxchat-progress-fill" style="width: <?php echo esc_attr($pdf_status['percentage']); ?>%"></div>
                                </div>
                                <div class="mxchat-status-details">
                                    <p><?php printf(
                                        esc_html__('Progress: %1$d of %2$d pages (%3$d%%)', 'mxchat'),
                                        absint($pdf_status['processed_pages']),
                                        absint($pdf_status['total_pages']),
                                        absint($pdf_status['percentage'])
                                    ); ?></p>
                                    <p><?php printf(
                                        esc_html__('Status: %s', 'mxchat'),
                                        esc_html(ucfirst($pdf_status['status']))
                                    ); ?></p>
                                    <p><?php printf(
                                        esc_html__('Last update: %s', 'mxchat'),
                                        esc_html($pdf_status['last_update'])
                                    ); ?></p>
                                </div>
                            </div>
                        <?php endif; ?>

                        <?php if ($sitemap_status && $sitemap_status['status'] !== 'complete') : ?>
                            <div class="mxchat-status-card">
                                <div class="mxchat-status-header">
                                    <h4><?php esc_html_e('Sitemap Processing Status (Refresh for update)', 'mxchat'); ?></h4>
                                    <?php if ($is_processing) : ?>
                                        <form method="post" class="mxchat-stop-form"
                                              action="<?php echo esc_url(admin_url('admin-post.php?action=mxchat_stop_processing')); ?>">
                                            <?php wp_nonce_field('mxchat_stop_processing_action', 'mxchat_stop_processing_nonce'); ?>
                                            <button type="submit" name="stop_processing" class="mxchat-button-secondary">
                                                <?php esc_html_e('Stop Processing', 'mxchat'); ?>
                                            </button>
                                        </form>
                                    <?php endif; ?>
                                </div>
                                <div class="mxchat-progress-bar">
                                    <div class="mxchat-progress-fill" style="width: <?php echo esc_attr($sitemap_status['percentage']); ?>%"></div>
                                </div>
                                <div class="mxchat-status-details">
                                    <p><?php printf(
                                        esc_html__('Progress: %1$d of %2$d URLs (%3$d%%)', 'mxchat'),
                                        absint($sitemap_status['processed_urls']),
                                        absint($sitemap_status['total_urls']),
                                        absint($sitemap_status['percentage'])
                                    ); ?></p>
                                    <?php if (!empty($sitemap_status['error']) || !empty($sitemap_status['last_error'])) : ?>
                                        <div class="mxchat-error-notice">
                                            <?php if (!empty($sitemap_status['error'])) : ?>
                                                <p class="error"><?php echo esc_html($sitemap_status['error']); ?></p>
                                            <?php endif; ?>
                                            <?php if (!empty($sitemap_status['last_error'])) : ?>
                                                <p class="last-error"><?php echo esc_html__('Last error:', 'mxchat') . ' ' . esc_html($sitemap_status['last_error']); ?></p>
                                            <?php endif; ?>
                                        </div>
                                    <?php endif; ?>
                                </div>
                            </div>
                        <?php endif; ?>
                    </div>


                </div>
            </div>

            <!-- Direct Content Submission Card -->
<div class="mxchat-card">
    <div class="mxchat-card-header">
        <h2><?php esc_html_e('Submit Direct Content', 'mxchat'); ?></h2>
    </div>
    <form id="mxchat-content-form" method="post"
          action="<?php echo esc_url(admin_url('admin-post.php?action=mxchat_submit_content')); ?>">
        <?php wp_nonce_field('mxchat_submit_content_action', 'mxchat_submit_content_nonce'); ?>
        <div class="mxchat-form-group">
            <label for="article_content"><?php esc_html_e('Content:', 'mxchat'); ?></label>
            <textarea name="article_content" id="article_content" required
                      placeholder="<?php esc_attr_e('Enter your content here...', 'mxchat'); ?>"></textarea>
        </div>
        <div class="mxchat-form-group">
            <label for="article_url"><?php esc_html_e('Source URL (Optional):', 'mxchat'); ?></label>
            <input type="url" name="article_url" id="article_url"
                   placeholder="<?php esc_attr_e('Enter source URL', 'mxchat'); ?>">
        </div>
        <button type="submit" name="submit_content" class="mxchat-button-primary">
            <?php esc_html_e('Submit Content', 'mxchat'); ?>
        </button>
    </form>
</div>

<!-- Knowledge Base Table Card -->
<div class="mxchat-card">
    <div class="mxchat-card-header">
        <h2><?php esc_html_e('Knowledge Base', 'mxchat'); ?></h2>
        <div class="mxchat-header-actions">
            <!-- Search -->
            <form method="get" id="knowledge-search" class="mxchat-search-form">
                <?php wp_nonce_field('mxchat_prompts_search_nonce'); ?>
                <input type="hidden" name="page" value="mxchat-prompts" />
                <div class="mxchat-search-group">
                    <span class="dashicons dashicons-search"></span>
                    <input type="text"
                           name="search"
                           placeholder="<?php esc_attr_e('Search Knowledge', 'mxchat'); ?>"
                           value="<?php echo esc_attr($search_query); ?>" />
                </div>
            </form>

            <!-- Delete All -->
            <form method="post"
                  action="<?php echo esc_url(admin_url('admin-post.php?action=mxchat_delete_all_prompts')); ?>"
                  class="mxchat-delete-form"
                  onsubmit="return confirm('<?php esc_attr_e('Are you sure you want to delete all knowledge? This action cannot be undone.', 'mxchat'); ?>');">
                <?php wp_nonce_field('mxchat_delete_all_prompts_action', 'mxchat_delete_all_prompts_nonce'); ?>
                <button type="submit" name="delete_all_prompts" class="mxchat-button-danger">
                    <span class="dashicons dashicons-trash"></span>
                    <?php esc_html_e('Delete All', 'mxchat'); ?>
                </button>
            </form>
        </div>
    </div>

    <!-- Table -->
    <div class="mxchat-table-wrapper">
        <table class="mxchat-records-table">
            <thead>
                <tr>
                    <th><?php esc_html_e('ID', 'mxchat'); ?></th>
                    <th><?php esc_html_e('Content', 'mxchat'); ?></th>
                    <th><?php esc_html_e('Source', 'mxchat'); ?></th>
                    <th><?php esc_html_e('Actions', 'mxchat'); ?></th>
                </tr>
            </thead>
            <tbody>
                <?php if ($prompts) : ?>
                    <?php foreach ($prompts as $prompt) : ?>
                        <tr id="prompt-<?php echo esc_attr($prompt->id); ?>">
                            <td><?php echo esc_html($prompt->id); ?></td>
                            <td class="mxchat-content-cell">
                                <div class="content-view">
                                    <?php echo wp_kses_post(wpautop(esc_textarea($prompt->article_content))); ?>
                                </div>
                                <textarea class="content-edit" style="display:none;">
                                    <?php echo esc_textarea($prompt->article_content); ?>
                                </textarea>
                            </td>
                            <td class="mxchat-url-cell">
                                <?php if (!empty($prompt->source_url)) : ?>
                                    <a href="<?php echo esc_url($prompt->source_url); ?>" target="_blank">
                                        <span class="dashicons dashicons-external"></span>
                                        <?php esc_html_e('View Source', 'mxchat'); ?>
                                    </a>
                                <?php else : ?>
                                    <span class="mxchat-na"><?php esc_html_e('N/A', 'mxchat'); ?></span>
                                <?php endif; ?>
                            </td>
                            <td class="mxchat-actions-cell">
                                <button class="mxchat-button-icon edit-button"
                                        data-id="<?php echo esc_attr($prompt->id); ?>">
                                    <span class="dashicons dashicons-edit"></span>
                                </button>
                                <button class="mxchat-button-icon save-button"
                                        data-id="<?php echo esc_attr($prompt->id); ?>"
                                        style="display:none;"
                                        data-nonce="<?php echo wp_create_nonce('mxchat_save_inline_nonce'); ?>">
                                    <span class="dashicons dashicons-saved"></span>
                                </button>
                                <a href="<?php echo esc_url(admin_url(
                                    'admin-post.php?action=mxchat_delete_prompt&id=' . esc_attr($prompt->id)
                                    . '&_wpnonce=' . wp_create_nonce('mxchat_delete_prompt_nonce')
                                )); ?>"
                                   class="mxchat-button-icon delete-button"
                                   onclick="return confirm('<?php esc_attr_e('Are you sure you want to delete this entry?', 'mxchat'); ?>');">
                                    <span class="dashicons dashicons-trash"></span>
                                </a>
                            </td>
                        </tr>
                    <?php endforeach; ?>
                <?php else : ?>
                    <tr>
                        <td colspan="4" class="mxchat-no-records">
                            <?php esc_html_e('No knowledge base entries found.', 'mxchat'); ?>
                        </td>
                    </tr>
                <?php endif; ?>
            </tbody>
        </table>
    </div>

    <?php if ($page_links) : ?>
        <div class="mxchat-pagination">
            <?php echo wp_kses_post($page_links); ?>
        </div>
    <?php endif; ?>
</div>
</div>
</div>
<?php
}


public function mxchat_handle_delete_all_prompts() {
    // Verify nonce
    if (!isset($_POST['mxchat_delete_all_prompts_nonce']) || !wp_verify_nonce($_POST['mxchat_delete_all_prompts_nonce'], 'mxchat_delete_all_prompts_action')) {
        wp_die(__('Nonce verification failed.', 'mxchat'));
    }

    // Check permissions
    if (!current_user_can('manage_options')) {
        wp_die(__('You do not have sufficient permissions to delete all prompts.', 'mxchat'));
    }

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    // Delete all prompts from the table
    $wpdb->query("DELETE FROM {$table_name}");

    // Clear relevant cache
    wp_cache_delete('all_prompts', 'mxchat_prompts');

    // Redirect back with a success message
    $redirect_url = add_query_arg(array(
        'page' => 'mxchat-prompts',
        'all_deleted' => 'true'
    ), admin_url('admin.php'));

    wp_safe_redirect($redirect_url);
    exit;
}
public function mxchat_handle_delete_prompt() {
    // Sanitize and validate nonce
    $nonce = isset($_GET['_wpnonce']) ? sanitize_text_field(wp_unslash($_GET['_wpnonce'])) : '';
    if (empty($nonce) || !wp_verify_nonce($nonce, 'mxchat_delete_prompt_nonce')) {
        wp_die(esc_html__('Nonce verification failed.', 'mxchat'));
    }

    // Check permissions
    if (!current_user_can('manage_options')) {
        wp_die(esc_html__('You do not have sufficient permissions to delete prompts.', 'mxchat'));
    }

    // Validate and sanitize ID parameter
    $id = isset($_GET['id']) ? intval($_GET['id']) : 0;
    if ($id <= 0) {
        wp_die(esc_html__('Invalid prompt ID.', 'mxchat'));
    }

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    // Clear cache and delete prompt
    wp_cache_delete('prompt_' . $id, 'mxchat_prompts');
    $wpdb->delete($table_name, array('id' => $id), array('%d'));

    wp_safe_redirect(add_query_arg(array('page' => 'mxchat-prompts', 'deleted' => 'true'), admin_url('admin.php')));
    exit;
}
public function mxchat_generate_embedding($text) {
        $options = get_option('mxchat_options');
        $api_key = $options['api_key'] ?? esc_html__('default_api_key', 'mxchat');

        $response = wp_remote_post('https://api.openai.com/v1/embeddings', array(
            'body'    => wp_json_encode(array(
                'model' => esc_html__('text-embedding-ada-002', 'mxchat'),
                'input' => $text
            )),
            'headers' => array(
                'Authorization' => 'Bearer ' . $api_key,
                'Content-Type'  => esc_html__('application/json', 'mxchat')
            ),
        ));

        if (is_wp_error($response)) {
            return null;
        }

        $response_data = json_decode(wp_remote_retrieve_body($response), true);
        return $response_data['data'][0]['embedding'] ?? null;
    }
public function mxchat_delete_chat_history() {
        if (!current_user_can('manage_options')) {
            echo wp_json_encode(['error' => esc_html__('You do not have sufficient permissions.', 'mxchat')]);
            wp_die();
        }

        check_ajax_referer('mxchat_delete_chat_history', 'security');

        global $wpdb;
        $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';

        if (isset($_POST['delete_session_ids']) && is_array($_POST['delete_session_ids'])) {
            foreach ($_POST['delete_session_ids'] as $session_id) {
                $session_id_sanitized = sanitize_text_field($session_id);

                // Clear relevant cache before deletion
                $cache_key = 'chat_session_' . $session_id_sanitized;
                wp_cache_delete($cache_key, 'mxchat_chat_sessions');

                // Perform the deletion
                $wpdb->delete($table_name, ['session_id' => $session_id_sanitized]);
            }

            // Optionally, clear a general cache if you have one
            wp_cache_delete('all_chat_sessions', 'mxchat_chat_sessions');

            echo wp_json_encode(['success' => esc_html__('Selected chat sessions have been deleted.', 'mxchat')]);
        } else {
            echo wp_json_encode(['error' => esc_html__('No chat sessions selected for deletion.', 'mxchat')]);
        }

        wp_die();
    }


public function mxchat_save_inline_prompt() {
    // Check for nonce security
    check_ajax_referer('mxchat_save_inline_nonce');

    // Verify permissions
    if (!current_user_can('manage_options')) {
        wp_send_json_error(esc_html__('Permission denied.', 'mxchat'));
        return;
    }

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    // Validate and sanitize input data
    $prompt_id = isset($_POST['id']) ? absint($_POST['id']) : 0;
    $article_content = isset($_POST['article_content']) ? sanitize_textarea_field($_POST['article_content']) : '';
    $article_url = isset($_POST['article_url']) ? esc_url_raw($_POST['article_url']) : '';

    if ($prompt_id > 0 && !empty($article_content)) {
        // Re-generate the embedding vector for the updated content
        $embedding_vector = $this->mxchat_generate_embedding($article_content);

        if (is_array($embedding_vector)) {
            // Serialize the embedding vector before storing it
            $embedding_vector_serialized = serialize($embedding_vector);

            // Update the prompt in the database
            $updated = $wpdb->update(
                $table_name,
                array(
                    'article_content'   => $article_content,
                    'embedding_vector'  => $embedding_vector_serialized,
                    'source_url'        => $article_url,
                ),
                array('id' => $prompt_id),
                array('%s', '%s', '%s'),
                array('%d')
            );

            if ($updated !== false) {
                wp_send_json_success();
            } else {
                wp_send_json_error(esc_html__('Database update failed.', 'mxchat'));
            }
        } else {
            wp_send_json_error(esc_html__('Embedding generation failed.', 'mxchat'));
        }
    } else {
        wp_send_json_error(esc_html__('Invalid data.', 'mxchat'));
    }
}



// Add this method to handle post updates
public function handle_post_update($post_id, $post, $update) {
    // Basic validation checks
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE || wp_is_post_revision($post_id)) {
        return;
    }

    // Only process published content
    if (!in_array($post->post_status, array('publish'))) {
        return;
    }

    // Check if sync is enabled for this post type
    $post_type = $post->post_type;
    if (!in_array($post_type, array('post', 'page'))) {
        return;
    }

    $sync_option = ($post_type === 'post') ? 'mxchat_auto_sync_posts' : 'mxchat_auto_sync_pages';
    if (get_option($sync_option) != '1') {
        return;
    }

    // Prepare content and URL
    $content = wp_strip_all_tags($post->post_content);
    $url = get_permalink($post_id);

    // Generate embedding vector
    $embedding_vector = $this->mxchat_generate_embedding($content);
    if (!$embedding_vector) {
        return;
    }

    // Check for Pinecone addon and its settings
    $pinecone_settings = get_option('mxchat_pinecone_addon_options');
    $use_pinecone = false;

    if ($pinecone_settings && is_array($pinecone_settings)) {
        // Check if Pinecone is enabled and all required settings are present
        $use_pinecone = (
            isset($pinecone_settings['mxchat_use_pinecone']) &&
            $pinecone_settings['mxchat_use_pinecone'] === '1' &&
            !empty($pinecone_settings['mxchat_pinecone_api_key']) &&
            !empty($pinecone_settings['mxchat_pinecone_host']) &&
            !empty($pinecone_settings['mxchat_pinecone_index']) &&
            !empty($pinecone_settings['mxchat_pinecone_environment'])
        );
    }

    if ($use_pinecone) {
        // Use Pinecone
        $pinecone_result = $this->store_in_pinecone_main(
            $embedding_vector,
            $content,
            $url,
            $pinecone_settings['mxchat_pinecone_api_key'],
            $pinecone_settings['mxchat_pinecone_environment'],
            $pinecone_settings['mxchat_pinecone_index']
        );

        if (!$pinecone_result['success']) {
            //error_log('MXChat: Pinecone sync failed - falling back to WordPress DB');
            $this->store_in_wordpress_db($content, $url, $embedding_vector);
        }
    } else {
        // Fallback to WordPress DB storage
        $this->store_in_wordpress_db($content, $url, $embedding_vector);
    }
}
// Modified storage function to add type field
private function store_in_pinecone_main($embedding_vector, $content, $url, $api_key, $environment, $index_name, $vector_id = null) {
    $vector_id = $vector_id ?: md5($url);
    $options = get_option('mxchat_pinecone_addon_options');
    $host = $options['mxchat_pinecone_host'] ?? '';

    if (empty($host)) {
        return array(
            'success' => false,
            'message' => 'Pinecone host is not configured. Please set the host in your settings.'
        );
    }

    // Determine if this is a product URL
    $is_product = (strpos($url, '/product/') !== false || strpos($url, '/shop/') !== false);

    $api_endpoint = "https://{$host}/vectors/upsert";
    $request_body = array(
        'vectors' => array(
            array(
                'id' => $vector_id,
                'values' => $embedding_vector,
                'metadata' => array(
                    'text' => $content,
                    'source_url' => $url,
                    'type' => $is_product ? 'product' : 'content',
                    'last_updated' => time()
                )
            )
        )
    );

    $response = wp_remote_post($api_endpoint, array(
        'headers' => array(
            'Api-Key' => $api_key,
            'accept' => 'application/json',
            'content-type' => 'application/json'
        ),
        'body' => wp_json_encode($request_body),
        'timeout' => 30,
        'data_format' => 'body'
    ));

    if (is_wp_error($response)) {
        return array(
            'success' => false,
            'message' => $response->get_error_message()
        );
    }

    $response_code = wp_remote_retrieve_response_code($response);
    if ($response_code !== 200) {
        $body = wp_remote_retrieve_body($response);
        return array(
            'success' => false,
            'message' => sprintf(
                'Pinecone API error (HTTP %d): %s',
                $response_code,
                $body
            )
        );
    }

    return array(
        'success' => true,
        'message' => 'Successfully stored in Pinecone'
    );
}
// Helper method for WordPress DB storage
private function store_in_wordpress_db($content, $url, $embedding_vector) {
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    $existing_entry = $wpdb->get_row(
        $wpdb->prepare("SELECT id FROM $table_name WHERE source_url = %s", $url)
    );

    if ($existing_entry) {
        $wpdb->update(
            $table_name,
            array(
                'article_content'  => $content,
                'embedding_vector' => serialize($embedding_vector),
                'timestamp'        => current_time('mysql')
            ),
            array('id' => $existing_entry->id),
            array('%s', '%s', '%s')
        );
    } else {
        $wpdb->insert(
            $table_name,
            array(
                'article_content'  => $content,
                'source_url'       => $url,
                'embedding_vector' => serialize($embedding_vector),
                'timestamp'        => current_time('mysql')
            ),
            array('%s', '%s', '%s', '%s')
        );
    }
}
/**
 * Handle deletion of posts and pages from both Pinecone and WordPress DB
 *
 * @param int $post_id The ID of the post being deleted
 * @return void
 */
public function mxchat_handle_post_delete($post_id) {
    // Get post data before it's deleted
    $post = get_post($post_id);

    // Basic validation
    if (!$post || wp_is_post_revision($post_id)) {
        return;
    }

    // Check post type
    $post_type = $post->post_type;
    if (!in_array($post_type, array('post', 'page'))) {
        return;
    }

    // Check if sync is enabled for this post type
    $sync_option = ($post_type === 'post') ? 'mxchat_auto_sync_posts' : 'mxchat_auto_sync_pages';
    if (get_option($sync_option) != '1') {
        return;
    }

    // Get the URL before post is deleted
    $source_url = get_permalink($post_id);
    if (!$source_url) {
        //error_log('MXChat: Failed to get permalink for post ' . $post_id);
        return;
    }

    // Check for Pinecone addon and its settings
    $pinecone_settings = get_option('mxchat_pinecone_addon_options');
    $use_pinecone = false;
    if ($pinecone_settings && is_array($pinecone_settings)) {
        $use_pinecone = (
            isset($pinecone_settings['mxchat_use_pinecone']) &&
            $pinecone_settings['mxchat_use_pinecone'] === '1' &&
            !empty($pinecone_settings['mxchat_pinecone_api_key']) &&
            !empty($pinecone_settings['mxchat_pinecone_host']) &&
            !empty($pinecone_settings['mxchat_pinecone_index']) &&
            !empty($pinecone_settings['mxchat_pinecone_environment'])
        );
    }

    $deletion_successful = false;

    if ($use_pinecone) {
        try {
            $pinecone_result = $this->delete_from_pinecone(
                array($source_url),
                $pinecone_settings['mxchat_pinecone_api_key'],
                $pinecone_settings['mxchat_pinecone_environment'],
                $pinecone_settings['mxchat_pinecone_index']
            );

            if (!$pinecone_result['success']) {
                //error_log('MXChat: Pinecone deletion failed for URL: ' . $source_url . ' - ' . $pinecone_result['message']);
            } else {
                $deletion_successful = true;
            }
        } catch (Exception $e) {
            //error_log('MXChat: Exception during Pinecone deletion - ' . $e->getMessage());
        }
    }

    // Always attempt WordPress DB deletion, regardless of Pinecone status
    try {
        global $wpdb;
        $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

        $result = $wpdb->delete(
            $table_name,
            array('source_url' => $source_url),
            array('%s')
        );

        if ($result === false) {
            //error_log('MXChat: WordPress DB deletion failed for URL: ' . $source_url);
        } else {
            $deletion_successful = true;
        }
    } catch (Exception $e) {
        //error_log('MXChat: Exception during WordPress DB deletion - ' . $e->getMessage());
    }

    if (!$deletion_successful) {
        //error_log('MXChat: Complete deletion failure for post ID: ' . $post_id . ' URL: ' . $source_url);
    }
}


public function mxchat_handle_content_submission() {
    // Check if the form was submitted and the user has permission.
    if (!isset($_POST['submit_content']) || !current_user_can('manage_options')) {
        return;
    }

    // Verify the nonce.
    $nonce = isset($_POST['mxchat_submit_content_nonce']) ? sanitize_text_field(wp_unslash($_POST['mxchat_submit_content_nonce'])) : '';
    if (!wp_verify_nonce($nonce, 'mxchat_submit_content_action')) {
        wp_die(esc_html__('Nonce verification failed.', 'mxchat'));
    }

    // Sanitize the inputs.
    $article_content = sanitize_textarea_field($_POST['article_content']);
    $article_url = isset($_POST['article_url']) ? esc_url_raw($_POST['article_url']) : '';

    // Generate the embedding vector.
    $embedding_vector = $this->mxchat_generate_embedding($article_content);
    if (!is_array($embedding_vector)) {
        set_transient('mxchat_admin_notice_error',
            esc_html__('Embedding generation failed. Please ensure your API key is correct and try again.', 'mxchat'),
            30
        );
        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    // Store in the WordPress database.
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';

    // Ensure the source_url column exists.
    if ($wpdb->get_var($wpdb->prepare("SHOW COLUMNS FROM {$table_name} LIKE %s", 'source_url')) != 'source_url') {
        $wpdb->query($wpdb->prepare("ALTER TABLE {$table_name} ADD source_url VARCHAR(255) DEFAULT ''"));
    }

    // Serialize and store the embedding vector.
    $embedding_vector_serialized = serialize($embedding_vector);
    $inserted = $wpdb->insert(
        $table_name,
        array(
            'article_content'  => $article_content,
            'embedding_vector' => $embedding_vector_serialized,
            'source_url'       => $article_url,
        ),
        array('%s', '%s', '%s')
    );

    if ($inserted === false) {
        set_transient('mxchat_admin_notice_error',
            esc_html__('Error inserting content into the database. Please try again.', 'mxchat'),
            30
        );
    } else {
        set_transient('mxchat_admin_notice_success',
            esc_html__('Content successfully submitted!', 'mxchat'),
            30
        );
    }

    wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
    exit;
}

private function is_pdf_url($url, $response) {
    $content_type = wp_remote_retrieve_header($response, 'content-type');
    $file_extension = strtolower(pathinfo($url, PATHINFO_EXTENSION));

    return strpos($content_type, 'pdf') !== false || $file_extension === 'pdf';
}
private function handle_pdf_for_knowledge_base($pdf_url, $response) {
    if (!current_user_can('manage_options')) {
        //error_log(esc_html__('Unauthorized PDF processing attempt', 'mxchat'));
        return false;
    }

    $pdf_url = esc_url_raw($pdf_url);
    $upload_dir = wp_upload_dir();

    if (isset($upload_dir['error']) && $upload_dir['error'] !== false) {
        //error_log(sprintf(esc_html__('Upload directory error: %s', 'mxchat'), esc_html($upload_dir['error'])));
        return false;
    }

    $pdf_filename = sanitize_file_name('mxchat_kb_' . time() . '.pdf');
    $pdf_path = trailingslashit($upload_dir['path']) . $pdf_filename;

    $response_body = wp_remote_retrieve_body($response);
    if (empty($response_body)) {
        //error_log(esc_html__('Empty PDF response body', 'mxchat'));
        return false;
    }

    if (!wp_mkdir_p(dirname($pdf_path))) {
        //error_log(sprintf(esc_html__('Failed to create directory for PDF: %s', 'mxchat'), esc_html($pdf_path)));
        return false;
    }

    try {
        file_put_contents($pdf_path, $response_body);

        if (!file_exists($pdf_path)) {
            throw new Exception(__('Failed to save PDF file', 'mxchat'));
        }

        $parser = new \Smalot\PdfParser\Parser();
        $pdf = $parser->parseFile($pdf_path);
        $total_pages = absint(count($pdf->getPages()));

        if ($total_pages < 1) {
            throw new Exception(__('Invalid PDF: no pages found', 'mxchat'));
        }

        wp_schedule_single_event(time(), 'mxchat_process_pdf_pages', array(
            'pdf_path' => $pdf_path,
            'pdf_url' => $pdf_url,
            'total_pages' => $total_pages,
            'batch_size' => absint(15),
            'batch_pause' => absint(10)
        ));

        $status_data = array(
            'total_pages' => $total_pages,
            'processed_pages' => 0,
            'status' => 'processing',
            'last_update' => time()
        );

        set_transient(
            sanitize_key('mxchat_pdf_status_' . md5($pdf_url)),
            array_map('sanitize_text_field', $status_data),
            DAY_IN_SECONDS
        );

        return __('scheduled', 'mxchat');

    } catch (Exception $e) {
        //error_log(sprintf(esc_html__('Error preparing PDF for processing: %s', 'mxchat'), esc_html($e->getMessage())));
        if (file_exists($pdf_path)) {
            wp_delete_file($pdf_path);
        }
        return false;
    }
}
public static function process_pdf_pages_cron($pdf_path, $pdf_url, $total_pages, $batch_size, $batch_pause) {
    // Validate inputs
    $pdf_path = sanitize_text_field($pdf_path);
    $pdf_url = esc_url_raw($pdf_url);
    $total_pages = absint($total_pages);
    $batch_size = absint($batch_size);
    $batch_pause = absint($batch_pause);

    try {
        if (!file_exists($pdf_path)) {
            throw new Exception(sprintf('PDF file not found at path: %s', esc_html($pdf_path)));
        }

        $parser = new \Smalot\PdfParser\Parser();
        $pdf = $parser->parseFile($pdf_path);
        $pages = $pdf->getPages();

        // Get current progress
        $status_key = sanitize_key('mxchat_pdf_status_' . md5($pdf_url));
        $status = get_transient($status_key);

        if (!$status || !is_array($status)) {
            throw new Exception('Invalid status data retrieved from transient');
        }

        $start_page = absint($status['processed_pages']);
        $end_page = min($start_page + $batch_size, $total_pages);

        $instance = new self(); // Create an instance of the class

        for ($i = $start_page; $i < $end_page; $i++) {
            $text = $pages[$i]->getText();
            $sanitized_content = $instance->mxchat_sanitize_content_for_api($text); // Call via instance

            if (!empty($sanitized_content)) {
                $embedding_vector = $instance->mxchat_generate_embedding($sanitized_content); // Call via instance
                if (is_array($embedding_vector)) {
                    $metadata = array(
                        'document_type' => 'pdf',
                        'total_pages' => $total_pages,
                        'current_page' => $i + 1,
                        'prev_page' => $i > 0 ? $i : null,
                        'next_page' => $i < ($total_pages - 1) ? $i + 2 : null,
                        'source_url' => $pdf_url
                    );

                    $content_with_metadata = wp_json_encode($metadata) . "\n---\n" . $sanitized_content;
                    $page_url = esc_url($pdf_url . "#page=" . ($i + 1));

                    $options = get_option('mxchat_options');
                    MxChat_Utils::submit_content_to_db($content_with_metadata, $page_url, $options['api_key']);
                }
            }

            // Update progress with sanitized data
            $status['processed_pages'] = absint($i + 1);
            $status['last_update'] = time();
            set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
        }

        // Schedule next batch if needed
        if ($end_page < $total_pages) {
            wp_schedule_single_event(time() + $batch_pause, 'mxchat_process_pdf_pages', array(
                'pdf_path' => $pdf_path,
                'pdf_url' => $pdf_url,
                'total_pages' => $total_pages,
                'batch_size' => $batch_size,
                'batch_pause' => $batch_pause
            ));
        } else {
            // Processing complete
            $status['status'] = 'complete';
            set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
            if (file_exists($pdf_path)) {
                wp_delete_file($pdf_path);
            }
        }

    } catch (\Exception $e) {
        $status['status'] = 'error';
        $status['error'] = sanitize_text_field($e->getMessage());
        set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
        if (file_exists($pdf_path)) {
            wp_delete_file($pdf_path);
        }
    }
}
public function get_pdf_processing_status($pdf_url) {
    $pdf_url = esc_url_raw($pdf_url);
    $status = get_transient(sanitize_key('mxchat_pdf_status_' . md5($pdf_url)));

    if (!$status || !is_array($status)) {
        return false;
    }

    return array(
        'total_pages' => absint($status['total_pages']),
        'processed_pages' => absint($status['processed_pages']),
        'percentage' => ($status['total_pages'] > 0)
    ? round((absint($status['processed_pages']) / absint($status['total_pages'])) * 100)
    : 0,
        'status' => sanitize_text_field($status['status']),
        'last_update' => human_time_diff(absint($status['last_update']), time()) . ' ' . esc_html__('ago', 'mxchat')
    );
}
public function mxchat_handle_sitemap_submission() {
    // Check if the form was submitted and verify permissions
    if (!isset($_POST['submit_sitemap']) || !current_user_can('manage_options')) {
        wp_die(esc_html__('Unauthorized access', 'mxchat'));
    }

    // Verify nonce
    check_admin_referer('mxchat_submit_sitemap_action', 'mxchat_submit_sitemap_nonce');

    // Validate URL
    if (!isset($_POST['sitemap_url']) || empty($_POST['sitemap_url'])) {
        set_transient('mxchat_admin_notice_error',
            esc_html__('Please provide a valid URL.', 'mxchat'),
            30
        );
        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    $submitted_url = esc_url_raw($_POST['sitemap_url']);
    $response = wp_remote_get($submitted_url, array('timeout' => 30));

    if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
        $error_message = is_wp_error($response) ? $response->get_error_message() : __('Failed to fetch URL', 'mxchat');
        set_transient('mxchat_admin_notice_error',
            sprintf(
                esc_html__('Failed to fetch the URL: %s', 'mxchat'),
                esc_html($error_message)
            ),
            30
        );
        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    $content_type = wp_remote_retrieve_header($response, 'content-type');
    $body_content = wp_remote_retrieve_body($response);

    if (empty($body_content)) {
        set_transient('mxchat_admin_notice_error',
            esc_html__('Empty response received from URL.', 'mxchat'),
            30
        );
        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    // Handle PDF URL
    if ($this->is_pdf_url($submitted_url, $response)) {
        $result = $this->handle_pdf_for_knowledge_base($submitted_url, $response);

        if ($result === 'scheduled') {
            set_transient(
                'mxchat_last_pdf_url',
                sanitize_text_field($submitted_url),
                DAY_IN_SECONDS
            );
            set_transient('mxchat_admin_notice_info',
                esc_html__('PDF processing has started in the background. You can check the progress in the Knowledge Base section.', 'mxchat'),
                30
            );
        } else {
            set_transient('mxchat_admin_notice_error',
                esc_html__('Failed to start PDF processing. Please try again.', 'mxchat'),
                30
            );
        }

        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    // Handle Sitemap XML
    if (strpos($content_type, 'xml') !== false || strpos($body_content, '<urlset') !== false) {
        libxml_use_internal_errors(true);
        $xml = simplexml_load_string($body_content);
        $xml_errors = libxml_get_errors();
        libxml_clear_errors();

        if ($xml === false || !empty($xml_errors)) {
            set_transient('mxchat_admin_notice_error',
                esc_html__('Invalid sitemap XML. Please provide a valid sitemap.', 'mxchat'),
                30
            );
            wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
            exit;
        }

        $result = $this->handle_sitemap_for_knowledge_base($xml, $submitted_url);

        if ($result === 'scheduled') {
            set_transient(
                'mxchat_last_sitemap_url',
                sanitize_text_field($submitted_url),
                DAY_IN_SECONDS
            );
            set_transient('mxchat_admin_notice_info',
                esc_html__('Sitemap processing has started in the background. You can check the progress in the Knowledge Base section.', 'mxchat'),
                30
            );
        } else {
            set_transient('mxchat_admin_notice_error',
                esc_html__('Failed to start sitemap processing. Please try again.', 'mxchat'),
                30
            );
        }

        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    // Handle Regular URL
    $page_content = $this->mxchat_extract_main_content($body_content);
    $sanitized_content = $this->mxchat_sanitize_content_for_api($page_content);

    if (empty($sanitized_content)) {
        set_transient('mxchat_admin_notice_error',
            esc_html__('No valid content found on the provided URL.', 'mxchat'),
            30
        );
        wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
        exit;
    }

    $embedding_vector = $this->mxchat_generate_embedding($sanitized_content);
    if (is_array($embedding_vector)) {
        MxChat_Utils::submit_content_to_db(
            $sanitized_content,
            $submitted_url,
            $this->options['api_key']
        );
        set_transient('mxchat_admin_notice_success',
            esc_html__('URL content successfully submitted!', 'mxchat'),
            30
        );
    } else {
        set_transient('mxchat_admin_notice_error',
            esc_html__('Failed to generate embedding for the URL content. Please check your API key and try again.', 'mxchat'),
            30
        );
    }

    wp_safe_redirect(esc_url(admin_url('admin.php?page=mxchat-prompts')));
    exit;
}
private function handle_sitemap_for_knowledge_base($xml, $sitemap_url) {
    if (!current_user_can('manage_options')) {
        //error_log(esc_html__('Unauthorized sitemap processing attempt', 'mxchat'));
        return false;
    }

    try {
        $sitemap_url = esc_url_raw($sitemap_url);

        if (!$xml || !is_object($xml)) {
            throw new Exception(__('Invalid XML object provided', 'mxchat'));
        }

        $urls = [];
        foreach ($xml->url as $url_element) {
            $url = esc_url_raw((string)$url_element->loc);
            if ($url) {
                $urls[] = $url;
            }
        }

        $total_urls = absint(count($urls));

        if ($total_urls < 1) {
            throw new Exception(__('No valid URLs found in sitemap', 'mxchat'));
        }

        wp_schedule_single_event(time(), 'mxchat_process_sitemap_urls', array(
            'urls' => $urls,
            'sitemap_url' => $sitemap_url,
            'total_urls' => $total_urls,
            'batch_size' => absint(10),
            'batch_pause' => absint(5)
        ));

        $status_data = array(
            'total_urls' => $total_urls,
            'processed_urls' => 0,
            'status' => 'processing',
            'last_update' => time()
        );

        set_transient(
            sanitize_key('mxchat_sitemap_status_' . md5($sitemap_url)),
            array_map('sanitize_text_field', $status_data),
            DAY_IN_SECONDS
        );

        return __('scheduled', 'mxchat');

    } catch (\Exception $e) {
        //error_log(sprintf(esc_html__('Error preparing sitemap for processing: %s', 'mxchat'), esc_html($e->getMessage())));
        return false;
    }
}
public static function process_sitemap_urls_cron($urls, $sitemap_url, $total_urls, $batch_size, $batch_pause) {
    // Validate inputs
    $sitemap_url = esc_url_raw($sitemap_url);
    $total_urls = absint($total_urls);
    $batch_size = absint($batch_size);
    $batch_pause = absint($batch_pause);

    if (!is_array($urls) || empty($urls)) {
        return;
    }

    try {
        $status_key = sanitize_key('mxchat_sitemap_status_' . md5($sitemap_url));
        $status = get_transient($status_key);

        if (!$status || !is_array($status)) {
            throw new Exception('Invalid status data retrieved from transient');
        }

        $start_url = absint($status['processed_urls']);
        $end_url = min($start_url + $batch_size, $total_urls);
        $instance = new self();

        // Track failures in batch
        $batch_stats = [
            'processed' => 0,
            'failed' => 0,
            'last_error' => ''
        ];

        for ($i = $start_url; $i < $end_url; $i++) {
            $page_url = esc_url_raw($urls[$i]);
            $page_response = wp_remote_get($page_url);

            if (is_wp_error($page_response) || wp_remote_retrieve_response_code($page_response) !== 200) {
                $batch_stats['failed']++;
                continue;
            }

            $page_html = wp_remote_retrieve_body($page_response);
            $page_content = $instance->mxchat_extract_main_content($page_html);
            $sanitized_content = $instance->mxchat_sanitize_content_for_api($page_content);

            if (!empty($sanitized_content)) {
                $embedding_vector = $instance->mxchat_generate_embedding($sanitized_content);

                if (is_array($embedding_vector)) {
                    $options = get_option('mxchat_options');
                    $submission_result = MxChat_Utils::submit_content_to_db($sanitized_content, $page_url, $options['api_key']);

                    if (is_wp_error($submission_result)) {
                        $batch_stats['failed']++;
                        $batch_stats['last_error'] = $submission_result->get_error_message();
                        continue;
                    }

                    $batch_stats['processed']++;
                } else {
                    $batch_stats['failed']++;
                    $batch_stats['last_error'] = 'Failed to generate embedding. Please check OpenAI API key.';
                }
            }

            $status['processed_urls'] = absint($i + 1);
            $status['last_update'] = time();
            $status['failed_urls'] = absint($status['failed_urls'] ?? 0) + $batch_stats['failed'];
            $status['last_error'] = $batch_stats['last_error'];

            set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
        }

        // If all URLs in this batch failed, stop processing
        if ($batch_stats['processed'] === 0 && $batch_stats['failed'] > 0) {
            $status['status'] = 'error';
            $status['error'] = sprintf(
                'Processing stopped: %d consecutive failures. Last error: %s',
                $batch_stats['failed'],
                $batch_stats['last_error']
            );
            set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
            return;
        }

        if ($end_url < $total_urls) {
            wp_schedule_single_event(time() + $batch_pause, 'mxchat_process_sitemap_urls', array(
                'urls' => array_map('esc_url_raw', $urls),
                'sitemap_url' => $sitemap_url,
                'total_urls' => $total_urls,
                'batch_size' => $batch_size,
                'batch_pause' => $batch_pause,
            ));
        } else {
            $status['status'] = 'complete';
            set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
        }
    } catch (\Exception $e) {
        $status['status'] = 'error';
        $status['error'] = sanitize_text_field($e->getMessage());
        set_transient($status_key, array_map('sanitize_text_field', $status), DAY_IN_SECONDS);
    }
}

public function get_sitemap_processing_status($sitemap_url) {
    $sitemap_url = esc_url_raw($sitemap_url);
    $status = get_transient(sanitize_key('mxchat_sitemap_status_' . md5($sitemap_url)));

    if (!$status || !is_array($status)) {
        return false;
    }

    return array(
        'total_urls' => absint($status['total_urls']),
        'processed_urls' => absint($status['processed_urls']),
        'failed_urls' => absint($status['failed_urls'] ?? 0),
        'percentage' => ($status['total_urls'] > 0)
    ? round((absint($status['processed_urls']) / absint($status['total_urls'])) * 100)
    : 0,
        'status' => sanitize_text_field($status['status']),
        'last_update' => human_time_diff(absint($status['last_update']), time()) . ' ' . esc_html__('ago', 'mxchat'),
        'error' => isset($status['error']) ? sanitize_text_field($status['error']) : '',
        'last_error' => isset($status['last_error']) ? sanitize_text_field($status['last_error']) : ''
    );
}

public function mxchat_stop_processing() {
    // Verify permissions
    if (!current_user_can('manage_options')) {
        wp_die(esc_html__('Unauthorized access', 'mxchat'));
    }

    // Verify nonce
    check_admin_referer('mxchat_stop_processing_action', 'mxchat_stop_processing_nonce');

    // Get the last sitemap URL and clear its transient
    $sitemap_url = get_transient('mxchat_last_sitemap_url');
    if ($sitemap_url) {
        delete_transient('mxchat_sitemap_status_' . md5($sitemap_url));
        delete_transient('mxchat_last_sitemap_url');
    }

    // Get the last PDF URL and clear its transient
    $pdf_url = get_transient('mxchat_last_pdf_url');
    if ($pdf_url) {
        delete_transient('mxchat_pdf_status_' . md5($pdf_url));
        delete_transient('mxchat_last_pdf_url');
    }

    // Unschedule any pending sitemap events
    $timestamp = wp_next_scheduled('mxchat_process_sitemap_urls');
    if ($timestamp) {
        wp_unschedule_event($timestamp, 'mxchat_process_sitemap_urls');
    }

    // Redirect back with a success message
    set_transient('mxchat_admin_notice_success',
        esc_html__('Processing has been stopped successfully.', 'mxchat'),
        30
    );
    wp_safe_redirect(admin_url('admin.php?page=mxchat-prompts'));
    exit;
}
private function mxchat_sanitize_content_for_api($content) {
    // Remove script, style tags, and HTML comments
    $content = preg_replace('/<script\b[^>]*>(.*?)<\/script>/is', '', $content);
    $content = preg_replace('/<style\b[^>]*>(.*?)<\/style>/is', '', $content);
    $content = preg_replace('/<!--(.|\s)*?-->/', '', $content);

    // Remove all HTML tags and decode HTML entities
    $content = wp_strip_all_tags($content);
    $content = html_entity_decode($content, ENT_QUOTES | ENT_HTML5);

    // Trim and normalize whitespace
    $content = trim(preg_replace('/\s+/', ' ', $content));

    return $content;
}




public function mxchat_handle_product_change($post_id, $post, $update) {
    if ($post->post_type !== 'product') {
        return;
    }

    if ($post->post_status === 'publish') {
        add_action('shutdown', function() use ($post_id) {
            $product = wc_get_product($post_id);
            if ($product) {
                $this->mxchat_store_product_embedding($product);
            }
        });
    }
}

private function mxchat_store_product_embedding($product) {
    if (!isset($this->options['enable_woocommerce_integration']) ||
        !in_array($this->options['enable_woocommerce_integration'], ['1', 'on'])) {
        return;
    }

    $source_url = get_permalink($product->get_id());

    // Build description
    $regular_price = $product->get_regular_price();
    $sale_price = $product->get_sale_price();
    $description = $product->get_description() . "\n\n" .
                  esc_html__('Short Description:', 'mxchat') . " " . $product->get_short_description() . "\n" .
                  esc_html__('Price:', 'mxchat') . " " . $regular_price . "\n" .
                  esc_html__('Sale Price:', 'mxchat') . " " . ($sale_price ?: esc_html__('N/A', 'mxchat')) . "\n" .
                  esc_html__('SKU:', 'mxchat') . " " . $product->get_sku();

    // Generate embedding vector
    $embedding_vector = $this->mxchat_generate_embedding($description);
    if (!is_array($embedding_vector)) {
        return;
    }

    // Check for Pinecone addon and its settings
    $pinecone_settings = get_option('mxchat_pinecone_addon_options');
    $use_pinecone = false;

    if ($pinecone_settings && is_array($pinecone_settings)) {
        $use_pinecone = (
            isset($pinecone_settings['mxchat_use_pinecone']) &&
            $pinecone_settings['mxchat_use_pinecone'] === '1' &&
            !empty($pinecone_settings['mxchat_pinecone_api_key']) &&
            !empty($pinecone_settings['mxchat_pinecone_host']) &&
            !empty($pinecone_settings['mxchat_pinecone_index']) &&
            !empty($pinecone_settings['mxchat_pinecone_environment'])
        );
    }

    if ($use_pinecone) {
        $result = $this->store_in_pinecone_main(
            $embedding_vector,
            $description,
            $source_url,
            $pinecone_settings['mxchat_pinecone_api_key'],
            $pinecone_settings['mxchat_pinecone_environment'],
            $pinecone_settings['mxchat_pinecone_index']
        );

        if (!$result['success']) {
            // Fallback to WordPress DB if Pinecone storage fails
            $this->store_in_wordpress_db($description, $source_url, $embedding_vector);
        }
    } else {
        // Use WordPress DB storage
        $this->store_in_wordpress_db($description, $source_url, $embedding_vector);
    }
}

public function mxchat_handle_product_delete($post_id) {
    if (get_post_type($post_id) !== 'product') {
        return;
    }

    $source_url = get_permalink($post_id);

    // Check for Pinecone addon and its settings
    $pinecone_settings = get_option('mxchat_pinecone_addon_options');
    $use_pinecone = false;

    if ($pinecone_settings && is_array($pinecone_settings)) {
        $use_pinecone = (
            isset($pinecone_settings['mxchat_use_pinecone']) &&
            $pinecone_settings['mxchat_use_pinecone'] === '1' &&
            !empty($pinecone_settings['mxchat_pinecone_api_key']) &&
            !empty($pinecone_settings['mxchat_pinecone_host']) &&
            !empty($pinecone_settings['mxchat_pinecone_index']) &&
            !empty($pinecone_settings['mxchat_pinecone_environment'])
        );
    }

    if ($use_pinecone) {
        $this->delete_from_pinecone(
            array($source_url),
            $pinecone_settings['mxchat_pinecone_api_key'],
            $pinecone_settings['mxchat_pinecone_environment'],
            $pinecone_settings['mxchat_pinecone_index']
        );
    } else {
        // Fallback to WordPress DB deletion
        global $wpdb;
        $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
        $wpdb->delete($table_name, array('source_url' => $source_url), array('%s'));
    }
}


/**
 * Delete vectors from Pinecone by source URL
 *
 * @param array  $urls        Array of source URLs to delete
 * @param string $api_key     Pinecone API key
 * @param string $environment Pinecone environment
 * @param string $index_name  Pinecone index name
 * @return array Associative array with 'success' boolean and 'message' string
 */
private function delete_from_pinecone($urls, $api_key, $environment, $index_name) {
    // Get the Pinecone host from options (matching your store_in_pinecone_main pattern)
    $options = get_option('mxchat_pinecone_addon_options');
    $host = $options['mxchat_pinecone_host'] ?? '';

    if (empty($host)) {
        return array(
            'success' => false,
            'message' => 'Pinecone host is not configured. Please set the host in your settings.'
        );
    }

    // Build API endpoint using the configured host
    $api_endpoint = "https://{$host}/vectors/delete";

    // Create vector IDs from URLs (matching your store method's ID generation)
    $vector_ids = array_map('md5', $urls);

    // Prepare the delete request body
    $request_body = array(
        'ids' => $vector_ids,
        'filter' => array(
            'source_url' => array(
                '$in' => $urls
            )
        )
    );

    // Make the deletion request
    $response = wp_remote_post($api_endpoint, array(
        'headers' => array(
            'Api-Key' => $api_key,
            'accept' => 'application/json',
            'content-type' => 'application/json'
        ),
        'body' => wp_json_encode($request_body),
        'timeout' => 30,
        'data_format' => 'body'
    ));

    // Handle WordPress HTTP API errors
    if (is_wp_error($response)) {
        return array(
            'success' => false,
            'message' => $response->get_error_message()
        );
    }

    // Check response status
    $response_code = wp_remote_retrieve_response_code($response);
    if ($response_code !== 200) {
        $body = wp_remote_retrieve_body($response);
        return array(
            'success' => false,
            'message' => sprintf(
                'Pinecone API error (HTTP %d): %s',
                $response_code,
                $body
            )
        );
    }

    // Parse response body
    $body = wp_remote_retrieve_body($response);
    $response_data = json_decode($body, true);

    // Final validation of the response
    if (json_last_error() !== JSON_ERROR_NONE) {
        return array(
            'success' => false,
            'message' => 'Failed to parse Pinecone response: ' . json_last_error_msg()
        );
    }

    return array(
        'success' => true,
        'message' => sprintf('Successfully deleted %d vectors from Pinecone', count($vector_ids))
    );
}





public function mxchat_create_activation_page() {
    $license_status = get_option('mxchat_license_status', 'inactive');
    $license_error = get_option('mxchat_license_error', '');
    ?>
    <div class="wrap mxchat-admin-activation">
        <div class="mxchat-pro-hero">
            <h1 class="pro-title">
                <span class="pro-gradient-text">Activate</span> MxChat Pro
            </h1>
            <p class="pro-subtitle">
                <?php esc_html_e('Enter your license key to unlock premium features, advanced AI capabilities, and priority support.', 'mxchat'); ?>
            </p>
        </div>

        <?php if ($license_status === 'inactive' && !empty($license_error)): ?>
            <div class="error notice">
                <p><?php echo esc_html($license_error); ?></p>
            </div>
        <?php endif; ?>

        <form id="mxchat-activation-form" class="mxchat-pro-form" style="<?php echo $license_status === 'active' ? 'display: none;' : ''; ?>">
            <div class="mxchat-pro-form-container">
                <table class="form-table">
                    <tr valign="top">
                        <th scope="row"><?php esc_html_e('Email Address', 'mxchat'); ?></th>
                        <td>
                            <input type="email" id="mxchat_pro_email" name="mxchat_pro_email" value="<?php echo esc_attr(get_option('mxchat_pro_email')); ?>" class="regular-text mxchat-pro-input" required />
                        </td>
                    </tr>
                    <tr valign="top">
                        <th scope="row"><?php esc_html_e('Activation Key', 'mxchat'); ?></th>
                        <td>
                            <input type="text" id="mxchat_activation_key" name="mxchat_activation_key" value="<?php echo esc_attr(get_option('mxchat_activation_key')); ?>" class="regular-text mxchat-pro-input" required />
                        </td>
                    </tr>
                </table>
                <?php if ($license_status !== 'active'): ?>
                    <div class="mxchat-pro-button-container">
                        <button type="submit" id="activate_license_button" class="button button-primary mxchat-pro-button"><?php esc_html_e('Activate License', 'mxchat'); ?></button>
                        <div id="mxchat-activation-spinner" class="mxchat-activation-spinner" style="display: none;"></div>
                    </div>
                <?php endif; ?>
            </div>
        </form>
        <!-- License Status Display -->
        <div class="mxchat-pro-status">
            <h3><?php esc_html_e('License Status:', 'mxchat'); ?>
                <span id="mxchat-license-status" class="mxchat-status-badge <?php echo $license_status; ?>">
                    <?php echo $license_status === 'active' ? esc_html__('Active', 'mxchat') : esc_html__('Inactive', 'mxchat'); ?>
                </span>
            </h3>
        </div>

    </div>
    <?php
}

public function mxchat_intents_page_html() {
    if (!current_user_can('manage_options')) {
        return;
    }

    // Keep existing data fetching logic
    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_intents';
    $page = isset($_GET['paged']) ? max(1, intval($_GET['paged'])) : 1;
    $per_page = 20;
    $offset = ($page - 1) * $per_page;

    // Success message
    if (isset($_GET['updated']) && $_GET['updated'] === 'true') {
        echo '<div class="notice notice-success is-dismissible"><p>' .
             esc_html__('Intent updated successfully.', 'mxchat') .
             '</p></div>';
    }

    // Filtering logic
    $where = '1=1';
    $search_term = isset($_GET['s']) ? trim($_GET['s']) : '';
    $callback_filter = isset($_GET['callback_filter']) ? sanitize_text_field($_GET['callback_filter']) : '';

    if ($search_term) {
        $search_term_like = '%' . $wpdb->esc_like($search_term) . '%';
        $where .= $wpdb->prepare(' AND (intent_label LIKE %s OR phrases LIKE %s)',
                                $search_term_like, $search_term_like);
    }

    if ($callback_filter) {
        $where .= $wpdb->prepare(' AND callback_function = %s', $callback_filter);
    }

    // Pagination
    $total_intents = $wpdb->get_var("SELECT COUNT(*) FROM $table_name WHERE $where");
    $total_pages = ceil($total_intents / $per_page);

    // Get intents
    $intents = $wpdb->get_results($wpdb->prepare(
        "SELECT * FROM $table_name WHERE $where LIMIT %d OFFSET %d",
        $per_page, $offset
    ));

    // Get callbacks
    $available_callbacks = $this->mxchat_get_available_callbacks();

    ?>
    <div class="wrap mxchat-wrapper">
        <!-- Hero Section -->
        <div class="mxchat-hero">
            <h1 class="mxchat-main-title">
                <span class="mxchat-gradient-text">Intent</span> Manager
            </h1>
            <p class="mxchat-hero-subtitle">
                <?php esc_html_e('Create and manage custom intents to enhance your chatbots understanding and response capabilities.', 'mxchat'); ?>
            </p>
        </div>

        <div class="mxchat-content">
            <!-- Add Intent Card -->
            <div class="mxchat-card">
                <div class="mxchat-card-header">
                    <h2><?php esc_html_e('Add New Intent', 'mxchat'); ?></h2>
                </div>

                <div class="mxchat-intent-documentation">
                    <p>
                        <?php esc_html_e('We highly encourage users to quickly read our ', 'mxchat'); ?>
                        <a href="https://mxchat.ai/documentation/#intents" target="_blank" rel="noopener noreferrer">
                            <?php esc_html_e('documentation', 'mxchat'); ?>
                        </a>
                        <?php esc_html_e(' to better understand intents. Some intents require setup in the Integration tab. If your intent is not triggering lower similarity threshold test.', 'mxchat'); ?>
                    </p>
                </div>

                <form id="mxchat-add-intent-form" method="post"
                      action="<?php echo esc_url(admin_url('admin-post.php')); ?>">
                    <input type="hidden" name="action" value="mxchat_add_intent">
                    <?php wp_nonce_field('mxchat_add_intent_nonce'); ?>

                    <div class="mxchat-form-group">
                        <label for="intent_label">
                            <?php esc_html_e('Intent Label (For your reference only)', 'mxchat'); ?>
                        </label>
                        <input name="intent_label" type="text" id="intent_label" required
                               class="mxchat-intent-input"
                               placeholder="<?php esc_attr_e('Example Email Capture: Newsletter Signup', 'mxchat'); ?>">
                    </div>

                    <div class="mxchat-form-group">
                        <label for="phrases">
                            <?php esc_html_e('Phrases (comma-separated)', 'mxchat'); ?>
                        </label>
                        <textarea name="phrases" id="phrases" rows="5" required
                                class="mxchat-intent-textarea"
                                placeholder="<?php esc_attr_e('Example Email Capture: sign me up, subscribe me, I want to join, add me to the newsletter, send me updates, keep me informed', 'mxchat'); ?>"></textarea>
                    </div>

                    <div class="mxchat-form-group">
                        <label for="callback_function">
                            <?php esc_html_e('Callback Function', 'mxchat'); ?>
                        </label>
                        <select name="callback_function" id="callback_function"
                                class="mxchat-intent-select" required>
                            <option value="">
                                <?php esc_html_e('Select a Callback', 'mxchat'); ?>
                            </option>
                            <?php
                            $groups = $this->mxchat_get_available_callbacks(true);
                            foreach ($groups as $group_label => $group_callbacks) :
                                echo '<optgroup label="' . esc_attr($group_label) . '">';
                                foreach ($group_callbacks as $function => $data) :
                                    $label = $data['label'];
                                    $pro_only = $data['pro_only'];
                                    $disabled = (!$this->is_activated && $pro_only) ? 'disabled' : '';
                                    $label_suffix = (!$this->is_activated && $pro_only) ? ' (Pro Only)' : '';
                                    ?>
                                    <option value="<?php echo esc_attr($function); ?>"
                                            <?php echo $disabled; ?>>
                                        <?php echo esc_html($label . $label_suffix); ?>
                                    </option>
                                <?php
                                endforeach;
                                echo '</optgroup>';
                            endforeach;
                            ?>
                        </select>
                    </div>

                    <button type="submit" class="mxchat-button-primary">
                        <?php esc_html_e('Add Intent', 'mxchat'); ?>
                    </button>
                </form>
            </div>

            <!-- Manage Intents Card -->
            <div class="mxchat-card">
                <div class="mxchat-card-header">
                    <h2><?php esc_html_e('Manage Intents', 'mxchat'); ?></h2>
                    <div class="mxchat-header-actions">
                        <form method="get" class="mxchat-search-form">
                            <input type="hidden" name="page" value="mxchat-intents">
                            <div class="mxchat-search-group">
                                <span class="dashicons dashicons-search"></span>
                                <input type="text" name="s"
                                       placeholder="<?php esc_attr_e('Search Intents', 'mxchat'); ?>"
                                       value="<?php echo esc_attr($search_term); ?>">
                                <select name="callback_filter" class="mxchat-intent-filter">
                                    <option value="">
                                        <?php esc_html_e('All Callbacks', 'mxchat'); ?>
                                    </option>
                                    <?php foreach ($available_callbacks as $function => $callback_data) :
                                        $label = $callback_data['label']; ?>
                                        <option value="<?php echo esc_attr($function); ?>"
                                                <?php selected($callback_filter, $function); ?>>
                                            <?php echo esc_html($label); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                                <button type="submit" class="mxchat-button-secondary">
                                    <?php esc_html_e('Filter', 'mxchat'); ?>
                                </button>
                            </div>
                        </form>
                    </div>
                </div>

                <div class="mxchat-table-wrapper">
                    <table class="mxchat-records-table">
                        <thead>
                            <tr>
                                <th><?php esc_html_e('Intent Label', 'mxchat'); ?></th>
                                <th><?php esc_html_e('Phrases', 'mxchat'); ?></th>
                                <th><?php esc_html_e('Callback Function', 'mxchat'); ?></th>
                                <th><?php esc_html_e('Similarity Threshold', 'mxchat'); ?></th>
                                <th><?php esc_html_e('Actions', 'mxchat'); ?></th>
                            </tr>
                        </thead>
                            <tbody>
                                <?php if ($intents) :
                                    foreach ($intents as $intent) :
                                        $callback_function = $intent->callback_function;
                                        $callback_label = isset($available_callbacks[$callback_function]['label'])
                                            ? $available_callbacks[$callback_function]['label']
                                            : $callback_function;
                                        $threshold_value = isset($intent->similarity_threshold)
                                            ? round($intent->similarity_threshold * 100)
                                            : 85;
                                        
                                        // Check if this is a form intent (its intent_label starts with "Form ")
                                        $is_form_intent = strpos($intent->intent_label, 'Form ') === 0;
                                        ?>
                                        <tr<?php echo $is_form_intent ? ' class="mxchat-form-intent"' : ''; ?>>
                                            <td>
                                                <?php 
                                                if ($is_form_intent) {
                                                    // Attempt to extract the form ID from the intent_label.
                                                    preg_match('/Form (\d+)/', $intent->intent_label, $matches);
                                                    $form_id = isset($matches[1]) ? intval($matches[1]) : 0;
                                                    if ($form_id) {
                                                        global $wpdb;
                                                        $forms_table = $wpdb->prefix . 'mxchat_forms';
                                                        $form = $wpdb->get_row($wpdb->prepare("SELECT title FROM $forms_table WHERE id = %d", $form_id));
                                                        if ($form && !empty($form->title)) {
                                                            echo esc_html($form->title);
                                                        } else {
                                                            echo esc_html($intent->intent_label);
                                                        }
                                                    } else {
                                                        echo esc_html($intent->intent_label);
                                                    }
                                                    echo ' <span class="mxchat-badge">Form Intent</span>';
                                                } else {
                                                    echo esc_html($intent->intent_label);
                                                }
                                                ?>
                                            </td>
                                            <td class="mxchat-content-cell">
                                                <?php echo esc_html($intent->phrases); ?>
                                            </td>
                                            <td><?php echo esc_html($callback_label); ?></td>
                                            <td>
                                                <!-- Similarity threshold adjustment (shown for all intents) -->
                                                <form method="post"
                                                      action="<?php echo esc_url(admin_url('admin-post.php')); ?>"
                                                      class="mxchat-threshold-form">
                                                    <?php wp_nonce_field('mxchat_update_intent_threshold_nonce'); ?>
                                                    <input type="hidden" name="action"
                                                           value="mxchat_update_intent_threshold">
                                                    <input type="hidden" name="intent_id"
                                                           value="<?php echo esc_attr($intent->id); ?>">
                                                    <div class="mxchat-slider-group">
                                                        <input type="range"
                                                               name="intent_threshold"
                                                               id="intent_threshold_<?php echo esc_attr($intent->id); ?>"
                                                               min="70"
                                                               max="95"
                                                               value="<?php echo esc_attr($threshold_value); ?>"
                                                               class="mxchat-intent-slider"
                                                               oninput="document.getElementById('threshold_output_<?php echo esc_attr($intent->id); ?>').value = this.value + '%'">
                                                        <output id="threshold_output_<?php echo esc_attr($intent->id); ?>"
                                                                class="mxchat-intent-output">
                                                            <?php echo esc_html($threshold_value); ?>%
                                                        </output>
                                                    </div>
                                                    <button type="submit" class="mxchat-button-icon">
                                                        <span class="dashicons dashicons-saved"></span>
                                                    </button>
                                                </form>
                                            </td>
                                            <td class="mxchat-actions-cell">
                                                <?php if (!$is_form_intent) : ?>
                                                    <!-- Standard intents: allow edit and delete -->
                                                    <button type="button"
                                                            class="mxchat-button-icon mxchat-edit-button"
                                                            data-intent-id="<?php echo esc_attr($intent->id); ?>"
                                                            data-phrases="<?php echo esc_attr($intent->phrases); ?>">
                                                        <span class="dashicons dashicons-edit"></span>
                                                    </button>
                                                    <form method="post"
                                                          action="<?php echo esc_url(admin_url('admin-post.php')); ?>"
                                                          class="mxchat-delete-form"
                                                          onsubmit="return confirm('<?php esc_attr_e('Are you sure you want to delete this intent?', 'mxchat'); ?>');">
                                                        <?php wp_nonce_field('mxchat_delete_intent_nonce'); ?>
                                                        <input type="hidden" name="action" value="mxchat_delete_intent">
                                                        <input type="hidden" name="intent_id"
                                                               value="<?php echo esc_attr($intent->id); ?>">
                                                        <button type="submit" class="mxchat-button-icon">
                                                            <span class="dashicons dashicons-trash"></span>
                                                        </button>
                                                    </form>
                                                <?php else : ?>
                                                    <!-- Form intents: show manage in forms button -->
                                                    <?php
                                                    preg_match('/Form (\d+)/', $intent->intent_label, $matches);
                                                    $form_id = isset($matches[1]) ? $matches[1] : '';
                                                    ?>
                                                    <a href="<?php echo esc_url(admin_url('admin.php?page=mxchat-forms&action=edit&form_id=' . $form_id)); ?>" 
                                                       class="mxchat-button-secondary">
                                                        <?php esc_html_e('Manage in Forms', 'mxchat'); ?>
                                                    </a>
                                                <?php endif; ?>
                                            </td>
                                        </tr>
                                    <?php endforeach;
                                else : ?>
                                    <tr>
                                        <td colspan="5" class="mxchat-no-records">
                                            <?php esc_html_e('No intents found.', 'mxchat'); ?>
                                        </td>
                                    </tr>
                                <?php endif; ?>
                            </tbody>
                    </table>
                </div>

                <?php if ($total_pages > 1) : ?>
                    <div class="mxchat-pagination">
                        <?php
                        echo paginate_links(array(
                            'base' => add_query_arg('paged', '%#%'),
                            'format' => '',
                            'prev_text' => __('&laquo; Previous', 'mxchat'),
                            'next_text' => __('Next &raquo;', 'mxchat'),
                            'total' => $total_pages,
                            'current' => $page
                        ));
                        ?>
                    </div>
                <?php endif; ?>
            </div>
        </div>

        <!-- Edit Modal -->
<div id="mxchat-edit-modal" class="mxchat-modal" style="display: none;">
    <div class="mxchat-modal-content">
        <span class="mxchat-modal-close">&times;</span>
        <div class="mxchat-card-header">
            <h2><?php esc_html_e('Edit Intent Phrases', 'mxchat'); ?></h2>
        </div>

        <form id="mxchat-edit-intent-form" method="post"
              action="<?php echo esc_url(admin_url('admin-post.php')); ?>">
            <?php wp_nonce_field('mxchat_edit_intent_nonce'); ?>
            <input type="hidden" name="action" value="mxchat_edit_intent">
            <input type="hidden" name="intent_id" id="edit_intent_id">

            <div class="mxchat-form-group">
                <label for="edit_phrases">
                    <?php esc_html_e('Phrases (comma-separated)', 'mxchat'); ?>
                </label>
                <textarea name="phrases"
                          id="edit_phrases"
                          rows="5"
                          class="mxchat-intent-textarea"
                          required></textarea>
            </div>

            <div class="mxchat-modal-actions">
                <button type="submit" class="mxchat-button-primary">
                    <?php esc_html_e('Update Phrases', 'mxchat'); ?>
                </button>
                <button type="button" class="mxchat-button-secondary mxchat-modal-cancel">
                    <?php esc_html_e('Cancel', 'mxchat'); ?>
                </button>
            </div>
        </form>
    </div>
</div>

        </div><!-- .mxchat-content -->
    </div><!-- .mxchat-wrapper -->

        <div id="mxchat-intent-loading" class="mxchat-intent-loading" style="display: none;">
            <div class="mxchat-intent-loading-spinner"></div>
            <div class="mxchat-intent-loading-text">
                <?php esc_html_e('Saving intent, please wait...', 'mxchat'); ?>
            </div>
        </div>
<?php
}



/**
 * Handle editing of intent phrases
 *
 * @since 1.0.0
 * @return void
 */
public function handle_edit_intent() {
    // Verify nonce and user capabilities
    if (!isset($_POST['_wpnonce']) || !wp_verify_nonce($_POST['_wpnonce'], 'mxchat_edit_intent_nonce')) {
        wp_die(esc_html__('Security check failed.', 'mxchat'));
    }

    if (!current_user_can('manage_options')) {
        wp_die(esc_html__('You do not have permission to perform this action.', 'mxchat'));
    }

    // Validate and sanitize input
    $intent_id = isset($_POST['intent_id']) ? absint($_POST['intent_id']) : 0;
    if (!$intent_id) {
        wp_die(esc_html__('Invalid intent ID.', 'mxchat'));
    }

    $phrases_input = isset($_POST['phrases']) ? sanitize_textarea_field($_POST['phrases']) : '';
    if (empty($phrases_input)) {
        wp_die(esc_html__('Phrases cannot be empty.', 'mxchat'));
    }

    // Process phrases the same way as in intent creation
    $phrases_array = array_map('sanitize_text_field', array_filter(array_map('trim', explode(',', $phrases_input))));

    if (empty($phrases_array)) {
        wp_die(esc_html__('Please enter at least one valid phrase.', 'mxchat'));
    }

    // Generate embeddings and combine them
    $vectors = [];
    foreach ($phrases_array as $phrase) {
        $embedding_vector = $this->mxchat_generate_embedding($phrase, $this->options['api_key']);
        if (is_array($embedding_vector)) {
            $vectors[] = $embedding_vector;
        } else {
            wp_die(esc_html__('Error generating embedding for phrase: ', 'mxchat') . esc_html($phrase));
        }
    }

    if (empty($vectors)) {
        wp_die(esc_html__('No valid embeddings generated. Please check your phrases.', 'mxchat'));
    }

    // Create combined vector just like in intent creation
    $combined_vector = $this->mxchat_average_vectors($vectors);
    $serialized_vector = maybe_serialize($combined_vector);

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_intents';

    // Update the intent with both new phrases and the combined vector
    $result = $wpdb->update(
        $table_name,
        array(
            'phrases' => implode(', ', $phrases_array),
            'embedding_vector' => $serialized_vector
        ),
        array('id' => $intent_id),
        array('%s', '%s'),
        array('%d')
    );

    if (false === $result) {
        wp_die(esc_html__('Failed to update intent.', 'mxchat'));
    }

    // Redirect back to the intents page with a success message
    $redirect_url = add_query_arg(
        array(
            'page' => 'mxchat-intents',
            'updated' => 'true'
        ),
        admin_url('admin.php')
    );

    wp_safe_redirect($redirect_url);
    exit;
}
public function mxchat_handle_update_intent_threshold() {
    if ( ! current_user_can( 'manage_options' ) ) {
        wp_die( esc_html__('Unauthorized user', 'mxchat') );
    }

    check_admin_referer('mxchat_update_intent_threshold_nonce');

    if (isset($_POST['intent_id'], $_POST['intent_threshold'])) {
        global $wpdb;
        $table_name = $wpdb->prefix . 'mxchat_intents';
        $intent_id = intval($_POST['intent_id']);
        $threshold_percentage = max(70, min(95, intval($_POST['intent_threshold'])));
        $similarity_threshold = $threshold_percentage / 100;

        $wpdb->update(
            $table_name,
            ['similarity_threshold' => $similarity_threshold],
            ['id' => $intent_id],
            ['%f'],
            ['%d']
        );
    }

    wp_safe_redirect(admin_url('admin.php?page=mxchat-intents'));
    exit;
}

public function mxchat_handle_add_intent() {
    if ( ! current_user_can( 'manage_options' ) ) {
        wp_die( esc_html__('Unauthorized user', 'mxchat') );
    }

    check_admin_referer('mxchat_add_intent_nonce');

    global $wpdb;
    $table_name = $wpdb->prefix . 'mxchat_intents';

    $intent_label = isset($_POST['intent_label']) ? sanitize_text_field($_POST['intent_label']) : '';
    $phrases_input = isset($_POST['phrases']) ? sanitize_textarea_field($_POST['phrases']) : '';
    $callback_function = isset($_POST['callback_function']) ? sanitize_text_field($_POST['callback_function']) : '';
    $default_threshold = 0.85;

    if (empty($intent_label) || empty($callback_function) || empty($phrases_input)) {
        wp_die( esc_html__('Invalid input. Please ensure all fields are filled out.', 'mxchat') );
    }

    $available_callbacks = $this->mxchat_get_available_callbacks();

    if (!array_key_exists($callback_function, $available_callbacks)) {
        wp_die( esc_html__('Invalid callback function selected.', 'mxchat') );
    }

    $is_pro_only = $available_callbacks[$callback_function]['pro_only'];
    if ($is_pro_only && !$this->is_activated) {
        wp_die( esc_html__('This callback function is available in the Pro version only.', 'mxchat') );
    }

    $phrases_array = array_map('sanitize_text_field', array_filter(array_map('trim', explode(',', $phrases_input))));

    if (empty($phrases_array)) {
        wp_die( esc_html__('Please enter at least one valid phrase.', 'mxchat') );
    }

    $vectors = [];
    foreach ($phrases_array as $phrase) {
        $embedding_vector = $this->mxchat_generate_embedding($phrase, $this->options['api_key']);
        if (is_array($embedding_vector)) {
            $vectors[] = $embedding_vector;
        } else {
            wp_die( esc_html__('Error generating embedding for phrase: ', 'mxchat') . esc_html($phrase) );
        }
    }

    if (!empty($vectors)) {
        $combined_vector = $this->mxchat_average_vectors($vectors);
        $serialized_vector = maybe_serialize($combined_vector);

        $result = $wpdb->insert($table_name, [
            'intent_label'         => $intent_label,
            'phrases'              => implode(', ', $phrases_array),
            'embedding_vector'     => $serialized_vector,
            'callback_function'    => $callback_function,
            'similarity_threshold' => $default_threshold,
        ]);

        if ($result === false) {
            wp_die( esc_html__('Database error: ', 'mxchat') . esc_html($wpdb->last_error) );
        }
    } else {
        wp_die( esc_html__('No valid embeddings generated. Please check your phrases.', 'mxchat') );
    }

    wp_safe_redirect(admin_url('admin.php?page=mxchat-intents'));
    exit;
}






private function mxchat_get_available_callbacks($grouped = false) {
    $callbacks = [
        'mxchat_handle_email_capture' => [
            'label'    => __('Email Capture', 'mxchat'),
            'pro_only' => false,
            'group'    => __('Customer Engagement', 'mxchat'),
        ],
        'mxchat_generate_image' => [
            'label'    => __('Generate Image', 'mxchat'),
            'pro_only' => true,
            'group'    => __('Other Features', 'mxchat'),
        ],
        'mxchat_handle_search_request' => [
            'label'    => __('Brave Web Search', 'mxchat'),
            'pro_only' => false,
            'group'    => __('Search Features', 'mxchat'),
        ],
        'mxchat_handle_image_search_request' => [
            'label'    => __('Brave Image Search', 'mxchat'),
            'pro_only' => false,
            'group'    => __('Search Features', 'mxchat'),
        ],
        'mxchat_handle_pdf_discussion' => [
            'label'    => __('Chat with PDF', 'mxchat'),
            'pro_only' => true,
            'group'    => __('Other Features', 'mxchat'),
        ],
        'mxchat_live_agent_handover' => [
            'label'    => __('Live Agent', 'mxchat'),
            'pro_only' => true,
            'group'    => __('Customer Engagement', 'mxchat'),
        ],
        'mxchat_handle_switch_to_chatbot_intent' => [
            'label'    => __('Back to Chatbot', 'mxchat'),
            'pro_only' => true,
            'group'    => __('Customer Engagement', 'mxchat'),
        ],
    ];

    // Allow other plugins to add their callbacks
    $callbacks = apply_filters('mxchat_available_callbacks', $callbacks);

    // Return grouped structure if requested
    if ($grouped) {
        $grouped_callbacks = [];
        foreach ($callbacks as $key => $data) {
            $group_label = $data['group'] ?? __('Other Features', 'mxchat');
            $grouped_callbacks[$group_label][$key] = [
                'label'    => $data['label'],
                'pro_only' => $data['pro_only'],
            ];
        }
        return $grouped_callbacks;
    }
    return $callbacks;
}


private function mxchat_average_vectors($vectors) {
    $vector_length = count($vectors[0]);
    $sum_vector = array_fill(0, $vector_length, 0);

    foreach ($vectors as $vector) {
        for ($i = 0; $i < $vector_length; $i++) {
            $sum_vector[$i] += $vector[$i];
        }
    }

    // Divide each component by the number of vectors to get the average
    $num_vectors = count($vectors);
    for ($i = 0; $i < $vector_length; $i++) {
        $sum_vector[$i] /= $num_vectors;
    }

    return $sum_vector;
}

public function mxchat_handle_delete_intent() {
    if ( ! current_user_can( 'manage_options' ) ) {
        wp_die( esc_html__('Unauthorized user', 'mxchat') );
    }

    check_admin_referer('mxchat_delete_intent_nonce');

    if (isset($_POST['intent_id'])) {
        global $wpdb;
        $table_name = $wpdb->prefix . 'mxchat_intents';
        $intent_id = intval($_POST['intent_id']);

        $wpdb->delete($table_name, ['id' => $intent_id], ['%d']);
    }

    wp_safe_redirect(admin_url('admin.php?page=mxchat-intents'));
    exit;
}


public function mxchat_page_init() {
    // Register settings
    register_setting(
        'mxchat_option_group',
        'mxchat_options',
        array($this, 'mxchat_sanitize')
    );

    register_setting(
        'mxchat_option_group',
        'mxchat_similarity_threshold',
        array(
            'type' => 'number',
            'sanitize_callback' => function($value) {
                $value = absint($value); // Ensure it's an integer
                return min(max($value, 70), 85); // Enforce range
            },
            'default' => 80,
        )
    );

    // Chatbot Settings Section
    add_settings_section(
        'mxchat_chatbot_section',
        esc_html__('Chatbot Settings', 'mxchat'),
        null,
        'mxchat-chatbot'
    );

    // Similarity Threshold Slider
    add_settings_field(
        'similarity_threshold', // Field ID
        esc_html__('Similarity Threshold', 'mxchat'), // Field title
        array($this, 'mxchat_similarity_threshold_callback'), // Callback function
        'mxchat-chatbot', // Page
        'mxchat_chatbot_section' // Section
    );

    add_settings_field(
        'append_to_body',
        esc_html__('Auto-Display Chatbot', 'mxchat'),
        array($this, 'mxchat_append_to_body_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );


    // Existing fields...
    add_settings_field(
        'api_key',
        esc_html__('OpenAI API Key', 'mxchat'),
        array($this, 'api_key_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'xai_api_key',
        esc_html__('X.AI API Key', 'mxchat'),
        array($this, 'xai_api_key_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'claude_api_key',
        esc_html__('Claude API Key', 'mxchat'),
        array($this, 'claude_api_key_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'deepseek_api_key',
        esc_html__('DeepSeek API Key', 'mxchat'),
        array($this, 'deepseek_api_key_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'system_prompt_instructions',
        esc_html__('AI Instructions (Behavior)', 'mxchat'),
        array($this, 'system_prompt_instructions_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'model',
        esc_html__('Model', 'mxchat'),
        array($this, 'mxchat_model_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'top_bar_title',
        esc_html__('Top Bar Title', 'mxchat'),
        array($this, 'mxchat_top_bar_title_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'enable_email_block',
        esc_html__('Require Email To Chat', 'mxchat'),
        array($this, 'enable_email_block_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'email_blocker_header_content',
        esc_html__('Require Email Chat Content', 'mxchat'),
        array($this, 'email_blocker_header_content_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'email_blocker_button_text',
        esc_html__('Require Email Chat Button Text', 'mxchat'),
        [$this, 'email_blocker_button_text_callback'],
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'intro_message',
        esc_html__('Introductory Message', 'mxchat'),
        array($this, 'mxchat_intro_message_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'input_copy',
        esc_html__('Input Copy', 'mxchat'),
        array($this, 'mxchat_input_copy_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'rate_limit_logged_out',
        __('Rate Limit for Logged-out Users', 'mxchat'),
        array($this, 'mxchat_rate_limit_logged_out_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'rate_limit_roles',
        __('Rate Limits by User Role', 'mxchat'),
        array($this, 'mxchat_rate_limit_roles_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'rate_limit_message',
        esc_html__('Rate Limit Message', 'mxchat'),
        array($this, 'mxchat_rate_limit_message_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'pre_chat_message',
        esc_html__('Chat Teaser Pop-up', 'mxchat'),
        array($this, 'mxchat_pre_chat_message_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'privacy_toggle',
        esc_html__('Toggle Privacy Notice', 'mxchat'),
        array($this, 'mxchat_privacy_toggle_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'complianz_toggle',
        esc_html__('Enable Complianz', 'mxchat'),
        array($this, 'mxchat_complianz_toggle_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'link_target_toggle',
        esc_html__('Open Links in a New Tab', 'mxchat'),
        array($this, 'mxchat_link_target_toggle_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'chat_persistence_toggle',
        esc_html__('Enable Chat Persistence', 'mxchat'),
        array($this, 'mxchat_chat_persistence_toggle_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'popular_question_1',
        esc_html__('Quick Question 1', 'mxchat'),
        array($this, 'mxchat_popular_question_1_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'popular_question_2',
        esc_html__('Quick Question 2', 'mxchat'),
        array($this, 'mxchat_popular_question_2_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'popular_question_3',
        esc_html__('Quick Question 3', 'mxchat'),
        array($this, 'mxchat_popular_question_3_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );

    add_settings_field(
        'additional_popular_questions',
        esc_html__('Additional Quick Questions', 'mxchat'),
        array($this, 'mxchat_additional_popular_questions_callback'),
        'mxchat-chatbot',
        'mxchat_chatbot_section'
    );


    // Loops Settings Section
    add_settings_section(
        'mxchat_loops_section',
        esc_html__('Loops Settings', 'mxchat'),
        null,
        'mxchat-embed'
    );

    // Loops Settings Fields
    add_settings_field(
        'loops_api_key',
        esc_html__('Loops API Key', 'mxchat'),
        array($this, 'mxchat_loops_api_key_callback'),
        'mxchat-embed',
        'mxchat_loops_section'
    );

    add_settings_field(
        'loops_mailing_list',
        esc_html__('Loops Mailing List', 'mxchat'),
        array($this, 'mxchat_loops_mailing_list_callback'),
        'mxchat-embed',
        'mxchat_loops_section'
    );

    add_settings_field(
        'triggered_phrase_response',
        esc_html__('Triggered Phrase Response', 'mxchat'),
        array($this, 'mxchat_triggered_phrase_response_callback'),
        'mxchat-embed',
        'mxchat_loops_section'
    );

    add_settings_field(
        'email_capture_response',
        esc_html__('Email Capture Response', 'mxchat'),
        array($this, 'mxchat_email_capture_response_callback'),
        'mxchat-embed',
        'mxchat_loops_section'
    );

    // Brave Search Settings Fields
    add_settings_section(
        'mxchat_brave_section',
        __('Brave Search Settings', 'mxchat'),
        array($this, 'mxchat_brave_section_callback'),
        'mxchat-embed'
    );

    add_settings_field(
        'brave_api_key',
        __('Brave API Key', 'mxchat'),
        array($this, 'mxchat_brave_api_key_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    add_settings_field(
        'brave_image_count',
        __('Number of Images to Return', 'mxchat'),
        array($this, 'mxchat_brave_image_count_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    add_settings_field(
        'brave_safe_search',
        __('Safe Search', 'mxchat'),
        array($this, 'mxchat_brave_safe_search_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    add_settings_field(
        'brave_news_count',
        __('Number of News Articles', 'mxchat'),
        array($this, 'mxchat_brave_news_count_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    add_settings_field(
        'brave_country',
        __('Country', 'mxchat'),
        array($this, 'mxchat_brave_country_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    add_settings_field(
        'brave_language',
        __('Language', 'mxchat'),
        array($this, 'mxchat_brave_language_callback'),
        'mxchat-embed',
        'mxchat_brave_section'
    );

    // Chat with PDF Intent Settings Fields
    add_settings_section(
        'mxchat_pdf_intent_section',
        __('Toolbar Settings & Intents', 'mxchat'),
        array($this, 'mxchat_pdf_intent_section_callback'),
        'mxchat-embed'
    );

    add_settings_field(
        'chat_toolbar_toggle',
        __('Show Chat Toolbar', 'mxchat'),
        array($this, 'mxchat_chat_toolbar_toggle_callback'),
        'mxchat-embed',
        'mxchat_pdf_intent_section'
    );

    add_settings_field(
        'pdf_intent_trigger_text',
        __('Intent Trigger Text', 'mxchat'),
        array($this, 'mxchat_pdf_intent_trigger_text_callback'),
        'mxchat-embed',
        'mxchat_pdf_intent_section'
    );

    add_settings_field(
        'pdf_intent_success_text',
        __('Success Text', 'mxchat'),
        array($this, 'mxchat_pdf_intent_success_text_callback'),
        'mxchat-embed',
        'mxchat_pdf_intent_section'
    );

    add_settings_field(
        'pdf_intent_error_text',
        __('Error Text', 'mxchat'),
        array($this, 'mxchat_pdf_intent_error_text_callback'),
        'mxchat-embed',
        'mxchat_pdf_intent_section'
    );

    // Add PDF Maximum Pages Field
    add_settings_field(
        'pdf_max_pages',
        __('Maximum Document Pages', 'mxchat'),
        array($this, 'mxchat_pdf_max_pages_callback'),
        'mxchat-embed',
        'mxchat_pdf_intent_section'
    );

    // Live Agent Settings Fields
    add_settings_section(
        'mxchat_live_agent_section',
        __('Live Agent Settings', 'mxchat'),
        array($this, 'mxchat_live_agent_section_callback'),
        'mxchat-embed'
    );

    // Live Agent Status Fields (add at top of live agent settings)
    add_settings_field(
        'live_agent_status',
        __('Live Agent Status', 'mxchat'),
        array($this, 'mxchat_live_agent_status_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );

    add_settings_field(
        'live_agent_notification_message',
        __('Notification Message', 'mxchat'),
        array($this, 'mxchat_live_agent_notification_message_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );

    add_settings_field(
        'live_agent_away_message',
        __('Away Message', 'mxchat'),
        array($this, 'mxchat_live_agent_away_message_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );

    add_settings_field(
        'live_agent_webhook_url',
        __('Slack Webhook URL', 'mxchat'),
        array($this, 'mxchat_live_agent_webhook_url_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );

    add_settings_field(
        'live_agent_secret_key',
        __('Slack Secret Key', 'mxchat'),
        array($this, 'mxchat_live_agent_secret_key_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );

    // Live Agent Integration Fields
    add_settings_field(
        'live_agent_bot_token',
        __('Slack Bot OAuth Token', 'mxchat'),
        array($this, 'mxchat_live_agent_bot_token_callback'),
        'mxchat-embed',
        'mxchat_live_agent_section'
    );




    // General Settings Section
    add_settings_section(
        'mxchat_general_section',
        esc_html__('Frequently Asked Questions (FAQ)', 'mxchat'),
        null,
        'mxchat-general'
    );
}

public function mxchat_prompts_page_init() {
    // Register all settings as a single array
        register_setting(
            'mxchat_prompts_options',
            'mxchat_prompts_options',
            array(
                'type' => 'array',
                'description' => __('MXChat Knowledge Base Settings', 'mxchat'),
                'default' => array(
                    'mxchat_auto_sync_posts' => 0,
                    'mxchat_auto_sync_pages' => 0,
                    'mxchat_use_pinecone' => 0,
                    'mxchat_pinecone_api_key' => '',
                    'mxchat_pinecone_environment' => '',
                    'mxchat_pinecone_index' => '',
                    'mxchat_pinecone_host' => '',  // Add this line
                ),
                'sanitize_callback' => array($this, 'sanitize_prompts_options'),
            )
        );

    // Add settings saved message
    add_action('admin_notices', array($this, 'sync_settings_notice'));
}

/**
 * Sanitize all prompts options
 *
 * @param array $input The unsanitized options array
 * @return array The sanitized options array
 */
public function sanitize_prompts_options($input) {
    // Log the incoming input.
    //error_log('Sanitizing inputs: ' . print_r($input, true));

    $sanitized = array();

    // Boolean options
    $sanitized['mxchat_auto_sync_posts'] = isset($input['mxchat_auto_sync_posts']) ? 1 : 0;
    $sanitized['mxchat_auto_sync_pages'] = isset($input['mxchat_auto_sync_pages']) ? 1 : 0;
$sanitized['mxchat_use_pinecone'] = !empty($input['mxchat_use_pinecone']) ? 1 : 0;

    // API Key: if less than 32 characters, flag as invalid.
    $api_key = sanitize_text_field($input['mxchat_pinecone_api_key'] ?? '');
    if (!empty($api_key) && strlen($api_key) < 32) {
        add_settings_error(
            'mxchat_prompts_options',
            'invalid_api_key',
            __('The Pinecone API key appears to be invalid. Please check your API key.', 'mxchat')
        );
        $existing_options = get_option('mxchat_prompts_options', array());
        $sanitized['mxchat_pinecone_api_key'] = $existing_options['mxchat_pinecone_api_key'] ?? '';
    } else {
        $sanitized['mxchat_pinecone_api_key'] = $api_key;
    }

    // Environment and Index Name
    $sanitized['mxchat_pinecone_environment'] = sanitize_text_field($input['mxchat_pinecone_environment'] ?? '');
    $sanitized['mxchat_pinecone_index'] = sanitize_text_field($input['mxchat_pinecone_index'] ?? '');

    // Host: Remove protocol and validate format.
    $host = sanitize_text_field($input['mxchat_pinecone_host'] ?? '');
    $host = preg_replace('#^https?://#', '', $host);
    //error_log('Host after removing protocol: ' . $host);
    if (!empty($host)) {
        if (!preg_match('/^[\w-]+\.svc\.[\w-]+\.pinecone\.io$/', $host)) {
            add_settings_error(
                'mxchat_prompts_options',
                'invalid_host',
                __('The Pinecone host appears to be invalid. It should look like "mxchat-vectors-zrmsquq.svc.aped-4627-b74a.pinecone.io"', 'mxchat')
            );
            $existing_options = get_option('mxchat_prompts_options', array());
            $sanitized['mxchat_pinecone_host'] = $existing_options['mxchat_pinecone_host'] ?? '';
        } else {
            $sanitized['mxchat_pinecone_host'] = $host;
        }
    } else {
        $sanitized['mxchat_pinecone_host'] = '';
    }

    //error_log('Final sanitized array: ' . print_r($sanitized, true));

    return $sanitized;
}


public function sync_settings_notice() {
    // Only show notice on our plugin page
    if (!isset($_GET['page']) || $_GET['page'] !== 'mxchat-prompts') {
        return;
    }

    // Check if settings were updated
    if (isset($_GET['settings-updated'])) {

        ?>
        <div class="notice notice-success is-dismissible">
            <p><?php esc_html_e('Sync settings updated successfully.', 'mxchat'); ?></p>
        </div>
        <?php

    }
}
// Add this sanitization function to your class
public function sanitize_sync_setting($input) {
    return (bool)$input ? __('1', 'mxchat') : __('', 'mxchat');
}



public function mxchat_handle_activate_license() {
    // Check nonce
    if (!check_ajax_referer('mxchat_activate_license_nonce', 'security', false)) {
        wp_send_json_error(esc_html__('Invalid security token', 'mxchat'));
        return;
    }

    // Verify user capabilities
    if (!current_user_can('manage_options')) {
        wp_send_json_error(esc_html__('Unauthorized access', 'mxchat'));
        return;
    }

    $license_key = isset($_POST['mxchat_activation_key']) ? sanitize_text_field($_POST['mxchat_activation_key']) : '';
    $customer_email = isset($_POST['mxchat_pro_email']) ? sanitize_email($_POST['mxchat_pro_email']) : '';

    if (empty($license_key) || empty($customer_email)) {
        wp_send_json_error(esc_html__('Email or License Key is missing', 'mxchat'));
        return;
    }

    $product_id = 'MxChatPRO';
    $response = wp_remote_get(
        add_query_arg(
            array(
                'wc-api' => 'software-api',
                'request' => 'activation',
                'email' => $customer_email,
                'license_key' => $license_key,
                'product_id' => $product_id
            ),
            'http://mxchat.ai/'
        )
    );

    if (is_wp_error($response)) {
        wp_send_json_error(esc_html__('Activation failed due to a server error: ', 'mxchat') . $response->get_error_message());
        return;
    }

    $body = wp_remote_retrieve_body($response);
    $data = json_decode($body);

    if ($data && isset($data->activated) && $data->activated) {
        update_option('mxchat_license_status', 'active');
        update_option('mxchat_pro_email', $customer_email);
        update_option('mxchat_activation_key', $license_key);
        wp_send_json_success(array('message' => esc_html__('License activated successfully', 'mxchat')));
    } else {
        $error_message = isset($data->error) ? $data->error : esc_html__('Activation failed', 'mxchat');
        update_option('mxchat_license_status', 'inactive');
        update_option('mxchat_license_error', $error_message);
        wp_send_json_error($error_message);
    }
}


public function mxchat_rate_limit_logged_out_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved rate limit or use the default value
    $default_rate_limit = '10';
    $selected_rate_limit = isset($all_options['rate_limit_logged_out']) ? $all_options['rate_limit_logged_out'] : $default_rate_limit;

    // Define available rate limits
    $rate_limits = array('1', '3', '5', '10', '15', '20', '100', 'unlimited');

    // Output the dropdown
    echo '<div class="pro-feature-wrapper active">';
    echo '<select id="rate_limit_logged_out" name="rate_limit_logged_out">';
    foreach ($rate_limits as $limit) {
        echo '<option value="' . esc_attr($limit) . '" ' . selected($selected_rate_limit, $limit, false) . '>' . esc_html($limit) . '</option>';
    }
    echo '</select>';
    echo '<p class="description">' . esc_html__('Set the maximum number of messages a logged-out user can send within a 24-hour period.', 'mxchat') . '</p>';
    echo '</div>';
}

// Add this new callback function
public function mxchat_rate_limit_roles_callback() {
    $all_options = get_option('mxchat_options', []);
    $roles = wp_roles()->get_names();
    $rate_limits = array('1', '3', '5', '10', '15', '20', '100', 'unlimited');

    echo '<div class="pro-feature-wrapper active mxchat-autosave-section">';

    foreach ($roles as $role_id => $role_name) {
        $default_rate_limit = '100';
        $selected_rate_limit = isset($all_options['role_rate_limits'][$role_id])
            ? $all_options['role_rate_limits'][$role_id]
            : $default_rate_limit;

        echo '<div style="margin-bottom: 10px;">';
        echo '<label style="display: inline-block; width: 150px;">' . esc_html($role_name) . ':</label>';
        echo '<select
                id="role_rate_limits_' . esc_attr($role_id) . '"
                name="mxchat_options[role_rate_limits][' . esc_attr($role_id) . ']"
                class="mxchat-autosave-field">';
        foreach ($rate_limits as $limit) {
            echo '<option value="' . esc_attr($limit) . '" ' . selected($selected_rate_limit, $limit, false) . '>' . esc_html($limit) . '</option>';
        }
        echo '</select>';
        echo '</div>';
    }

    echo '<p class="description">' . esc_html__('Set the maximum number of messages users in each role can send within a 24-hour period.', 'mxchat') . '</p>';
    echo '</div>';
}

public function mxchat_rate_limit_message_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved message or use the default value
    $default_message = esc_html__('Rate limit exceeded. Please try again later.', 'mxchat');
    $rate_limit_message = isset($all_options['rate_limit_message']) ? $all_options['rate_limit_message'] : $default_message;

    // Output the textarea
    echo '<div class="pro-feature-wrapper active">';
    printf(
        '<textarea id="rate_limit_message" name="rate_limit_message" rows="3" cols="50">%s</textarea>',
        esc_textarea($rate_limit_message)
    );
    echo '<p class="description">' . esc_html__('This message will be displayed when a user exceeds the rate limit.', 'mxchat') . '</p>';
    echo '</div>';
}


private function mxchat_add_option_field($id, $title, $callback = '') {
        add_settings_field(
            $id,
            __($title, 'mxchat'),
            $callback ? array($this, $callback) : array($this, $id . '_callback'),
            'mxchat-max',
            'mxchat_setting_section_id',
            $id === 'model' ? ['label_for' => 'model'] : []
        );
    }

public function api_key_callback() {
    // Retrieve from your stored 'api_key' in the mxchat_options array
    $apiKey = isset($this->options['api_key']) ? esc_attr($this->options['api_key']) : '';

    // Notice we changed the name to "api_key" (no array notation).
    echo '<input type="password" id="api_key" name="api_key" value="' . $apiKey . '" class="regular-text" />';
    echo '<button type="button" id="toggleApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '<p class="description">' . wp_kses_post(__('The <strong>OpenAI API key is required even when using other models</strong> as it is used for vector embedding functionality. You must add credits to your OpenAI billing account before use.', 'mxchat')) . '</p>';
}
public function xai_api_key_callback() {
    // Check if the feature is activated (paid feature)
    $disabled = $this->is_activated ? '' : 'disabled'; // Disable input if not activated
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive'; // CSS class to style the wrapper based on activation status

    // Retrieve the X.AI API key value
    $xaiApiKey = isset($this->options['xai_api_key']) ? esc_attr($this->options['xai_api_key']) : '';

    // Render the input field for the X.AI API key
    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<input type="password" id="xai_api_key" name="xai_api_key" value="%s" class="regular-text" %s />',
        $xaiApiKey,
        $disabled
    );
    echo '<button type="button" id="toggleXaiApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';

    // If the feature is not activated, show the overlay with a "Pro Only" message
    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }

    echo '</div>';
}
public function claude_api_key_callback() {
    // Check if the feature is activated (paid feature)
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    
    // Retrieve the Claude API key value directly like the others
    $claudeApiKey = isset($this->options['claude_api_key']) ? esc_attr($this->options['claude_api_key']) : '';
    
    // Use direct name field like the other working API keys
    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<input type="password" id="claude_api_key" name="claude_api_key" value="%s" class="regular-text" %s />',
        $claudeApiKey,
        $disabled
    );
    echo '<button type="button" id="toggleClaudeApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    
    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}
public function deepseek_api_key_callback() {
    // Retrieve from your stored 'deepseek_api_key' in the mxchat_options array
    $apiKey = isset($this->options['deepseek_api_key']) ? esc_attr($this->options['deepseek_api_key']) : '';

    // Notice we changed the name to "deepseek_api_key" (no array notation).
    echo '<input type="password" id="deepseek_api_key" name="deepseek_api_key" value="' . $apiKey . '" class="regular-text" />';
    echo '<button type="button" id="toggleDeepSeekApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
}





public function mxchat_loops_api_key_callback() {
    // Support both old and new format
    $loops_api_key = isset($this->options['loops_api_key']) ? esc_attr($this->options['loops_api_key']) : '';

    echo '<div class="api-key-wrapper">';
    echo sprintf(
        '<input type="password" id="loops_api_key" name="loops_api_key" value="%s" class="regular-text" />',
        $loops_api_key
    );
    echo '<button type="button" id="toggleLoopsApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '</div>';
    echo '<p class="description">' . esc_html__('Enter your Loops API Key here. (See FAQ for details)', 'mxchat') . '</p>';
}

public function mxchat_loops_mailing_list_callback() {
    // Add error handling and type checking
    $loops_api_key = '';
    $selected_list = '';

    // Safely get the API key
    if (isset($this->options['loops_api_key']) && is_string($this->options['loops_api_key'])) {
        $loops_api_key = $this->options['loops_api_key'];
    }

    // Safely get the selected list
    if (isset($this->options['loops_mailing_list']) && is_string($this->options['loops_mailing_list'])) {
        $selected_list = $this->options['loops_mailing_list'];
    }

    if (!empty($loops_api_key)) {
        $lists = $this->mxchat_fetch_loops_mailing_lists($loops_api_key);
        if (is_array($lists) && !empty($lists)) {
            echo '<select id="loops_mailing_list" name="loops_mailing_list">';
            foreach ($lists as $list) {
                if (is_array($list) && isset($list['id']) && isset($list['name'])) {
                    echo sprintf(
                        '<option value="%s" %s>%s</option>',
                        esc_attr($list['id']),
                        selected($selected_list, $list['id'], false),
                        esc_html($list['name'])
                    );
                }
            }
            echo '</select>';
        } else {
            echo '<p class="description">' . esc_html__('No lists found. Please verify your API Key.', 'mxchat') . '</p>';
        }
    } else {
        echo '<p class="description">' . esc_html__('Enter a valid Loops API Key to load mailing lists.', 'mxchat') . '</p>';
    }
}
public function mxchat_triggered_phrase_response_callback() {
    $default_response = __('Would you like to join our mailing list? Please provide your email below.', 'mxchat');
    $triggered_response = isset($this->options['triggered_phrase_response'])
        ? $this->options['triggered_phrase_response']
        : $default_response;

    echo sprintf(
        '<textarea id="triggered_phrase_response" name="triggered_phrase_response" rows="3" cols="50">%s</textarea>',
        esc_textarea($triggered_response)
    );
    echo '<p class="description">' . esc_html__('Enter the chatbot response when a trigger keyword is detected, prompting the user to share their email.', 'mxchat') . '</p>';
}

public function mxchat_email_capture_response_callback() {
    $default_response = __('Thank you for providing your email! You\'ve been added to our list.', 'mxchat');
    $email_capture_response = isset($this->options['email_capture_response'])
        ? $this->options['email_capture_response']
        : $default_response;

    echo sprintf(
        '<textarea id="email_capture_response" name="email_capture_response" rows="3" cols="50">%s</textarea>',
        esc_textarea($email_capture_response)
    );
    echo '<p class="description">' . esc_html__('Enter the message to send when a user provides their email.', 'mxchat') . '</p>';
}

public function mxchat_pre_chat_message_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved message or use the default value
    $default_message = __('Hey there! Ask me anything!', 'mxchat');
    $pre_chat_message = isset($all_options['pre_chat_message']) ? $all_options['pre_chat_message'] : $default_message;

    // Output the textarea
    printf(
        '<textarea id="pre_chat_message" name="pre_chat_message" rows="5" cols="50">%s</textarea>',
        esc_textarea($pre_chat_message)
    );
    echo '<p class="description">' . esc_html__('Set the message displayed to users before they start a chat. Use this to provide a friendly greeting or instructions.', 'mxchat') . '</p>';
}



// Callback for AI Instructions textarea
public function system_prompt_instructions_callback() {
    // Retrieve the current value of the system prompt instructions
    $instructions = isset($this->options['system_prompt_instructions']) ? esc_textarea($this->options['system_prompt_instructions']) : '';

    // Render the textarea field
    printf(
        '<textarea id="system_prompt_instructions" name="system_prompt_instructions" rows="5" cols="50">%s</textarea>',
        $instructions
    );

    // Provide a helpful description
    echo '<p class="description">' . esc_html__('Provide system-level instructions for the AI to guide its behavior. Be clear and concise for better results.', 'mxchat') . '</p>';
}


public function mxchat_model_callback() {
    // Define available models grouped by provider
    $models = array(
        esc_html__('X.AI Models', 'mxchat') => array(
            'grok-beta' => esc_html__('grok-beta (Early Beta)', 'mxchat'),
            'grok-2' => esc_html__('Grok 2', 'mxchat')
        ),
        esc_html__('DeepSeek Models', 'mxchat') => array(
            'deepseek-chat' => esc_html__('DeepSeek-V3', 'mxchat'),
        ),
        esc_html__('Claude Models', 'mxchat') => array(
            'claude-3-5-sonnet-20241022' => esc_html__('Claude 3.5 Sonnet (Most Intelligent)', 'mxchat'),
            'claude-3-opus-20240229' => esc_html__('Claude 3 Opus (Highly Complex Tasks)', 'mxchat'),
            'claude-3-sonnet-20240229' => esc_html__('Claude 3 Sonnet (Balanced)', 'mxchat'),
            'claude-3-haiku-20240307' => esc_html__('Claude 3 Haiku (Fastest)', 'mxchat')
        ),
        esc_html__('OpenAI Models', 'mxchat') => array(
            'gpt-4o' => esc_html__('GPT-4o (Recommended)', 'mxchat'),
            'gpt-4o-mini' => esc_html__('GPT-4o Mini (Fast and Lightweight)', 'mxchat'),
            'gpt-4-turbo' => esc_html__('GPT-4 Turbo (High-Performance)', 'mxchat'),
            'gpt-4' => esc_html__('GPT-4 (High Intelligence)', 'mxchat'),
            'gpt-3.5-turbo' => esc_html__('GPT-3.5 Turbo (Affordable and Fast)', 'mxchat')
        )
    );

    // Retrieve the currently selected model from saved options
    $selected_model = isset($this->options['model']) ? esc_attr($this->options['model']) : 'gpt-4o';

    // Begin the select dropdown
    echo '<select id="model" name="model">'; // No array notation in name attribute

    // Iterate over groups of models
    foreach ($models as $group_label => $group_models) {
        echo '<optgroup label="' . esc_attr($group_label) . '">';

        foreach ($group_models as $model_value => $model_label) {
            // Disable Pro-only models for non-activated users
            $disabled = (!$this->is_activated && ($group_label === esc_html__('X.AI Models', 'mxchat') || $group_label === esc_html__('Claude Models', 'mxchat'))) ? 'disabled' : '';
            $label_suffix = (!$this->is_activated && ($group_label === esc_html__('X.AI Models', 'mxchat') || $group_label === esc_html__('Claude Models', 'mxchat'))) ? esc_html__(' (Pro Only)', 'mxchat') : '';

            // Output the option element
            echo '<option value="' . esc_attr($model_value) . '" ' . selected($selected_model, $model_value, false) . ' ' . $disabled . '>' . esc_html($model_label . $label_suffix) . '</option>';
        }

        echo '</optgroup>';
    }

    // Close the select dropdown
    echo '</select>';

    // Add a description below the dropdown
    echo '<p class="description">' . esc_html__('Select the AI model to use for your chatbot. Pro-only models are marked accordingly.', 'mxchat') . '</p>';
}



public function mxchat_top_bar_title_callback() {
    // Retrieve the current value of the top bar title from saved options
    $top_bar_title = isset($this->options['top_bar_title']) ? esc_attr($this->options['top_bar_title']) : '';

    // Render the input field
    echo '<input type="text" id="top_bar_title" name="top_bar_title" value="' . $top_bar_title . '" />';

    // Add a description
    echo '<p class="description">' . esc_html__('Enter the title text that will appear on the top bar of the chatbot.', 'mxchat') . '</p>';
}

public function enable_email_block_callback() {
    // Load full plugin options array
    $all_options = get_option('mxchat_options', []);

    // Get the value, default to 'off'
    $enable_email_block = isset($all_options['enable_email_block']) ? $all_options['enable_email_block'] : 'off';

    // Check if it's 'on'
    $checked = ($enable_email_block === 'on') ? 'checked' : '';

    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="enable_email_block" name="enable_email_block" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';
    echo '<p class="description">' . esc_html__('Their email will appear at the top of the transcript. Email form will show for users who are not logged in or have not provided an email within 24h.', 'mxchat') . '</p>';
}



public function email_blocker_header_content_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved content or default to empty
    $content = isset($all_options['email_blocker_header_content'])
        ? $all_options['email_blocker_header_content']
        : '';

    // Render the textarea
    echo '<textarea
            id="email_blocker_header_content"
            name="email_blocker_header_content"
            rows="5"
            cols="70"
          >' . esc_textarea($content) . '</textarea>';

    echo '<p class="description">';
    echo esc_html__('You may enter HTML here, such as &lt;h2&gt;Welcome&lt;/h2&gt; or &lt;p&gt;Let\'s get started&lt;/p&gt;.', 'mxchat');
    echo '</p>';
}


public function email_blocker_button_text_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved button text or default to empty
    $button_text = isset($all_options['email_blocker_button_text'])
        ? $all_options['email_blocker_button_text']
        : '';

    // Use esc_attr to safely render the existing text
    echo '<input type="text" id="email_blocker_button_text" name="email_blocker_button_text" value="' . esc_attr($button_text) . '" style="width: 300px;" />';

    echo '<p class="description">';
    echo esc_html__('Enter the text you want on the submit button, e.g. "Start Chat".', 'mxchat');
    echo '</p>';
}



public function mxchat_intro_message_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved intro message or use the default
    $default_message = __('Hello! How can I assist you today?', 'mxchat');
    $saved_message = isset($all_options['intro_message']) ? $all_options['intro_message'] : $default_message;

    // Output the textarea with the saved value
    ?>
    <textarea id="intro_message" name="intro_message" rows="5" cols="50"><?php echo esc_textarea($saved_message); ?></textarea>
    <p class="description">
        <?php esc_html_e('Enter your message. Line breaks will be preserved.', 'mxchat'); ?>
    </p>
    <?php
}


public function mxchat_input_copy_callback() {
    // Load the entire 'mxchat_options' array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the saved input copy or use the default value
    $default_copy = __('How can I assist?', 'mxchat');
    $input_copy = isset($all_options['input_copy']) ? $all_options['input_copy'] : $default_copy;

    // Output the input field with the saved value
    printf(
        '<input type="text" id="input_copy" name="input_copy" value="%s" placeholder="%s" />',
        esc_attr($input_copy),
        esc_attr__('How can I assist?', 'mxchat')
    );

    // Output the description
    echo '<p class="description">' . esc_html__('This is the placeholder text for the chat input field.', 'mxchat') . '</p>';
}



public function mxchat_user_message_font_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="user_message_font_color"
               name="user_message_font_color"
               value="%s"
               class="my-color-field"
               data-default-color="#ffffff"
               %s />',
        isset($this->options['user_message_font_color']) ? esc_attr($this->options['user_message_font_color']) : '#ffffff',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_bot_message_bg_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="bot_message_bg_color"
               name="bot_message_bg_color"
               value="%s"
               class="my-color-field"
               data-default-color="#e1e1e1"
               %s />',
        isset($this->options['bot_message_bg_color']) ? esc_attr($this->options['bot_message_bg_color']) : '#e1e1e1',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_bot_message_font_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="bot_message_font_color"
               name="bot_message_font_color"
               value="%s"
               class="my-color-field"
               data-default-color="#333333"
               %s />',
        isset($this->options['bot_message_font_color']) ? esc_attr($this->options['bot_message_font_color']) : '#333333',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_message_bg_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="live_agent_message_bg_color"
               name="live_agent_message_bg_color"
               value="%s"
               class="my-color-field"
               data-default-color="#ffffff"
               %s />',
        isset($this->options['live_agent_message_bg_color']) ? esc_attr($this->options['live_agent_message_bg_color']) : '#ffffff',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_message_font_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="live_agent_message_font_color"
               name="live_agent_message_font_color"
               value="%s"
               class="my-color-field"
               data-default-color="#333333"
               %s />',
        isset($this->options['live_agent_message_font_color']) ? esc_attr($this->options['live_agent_message_font_color']) : '#333333',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_mode_indicator_bg_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="mode_indicator_bg_color"
               name="mode_indicator_bg_color"
               value="%s"
               class="my-color-field"
               data-default-color="#767676"
               %s />',
        isset($this->options['mode_indicator_bg_color']) ? esc_attr($this->options['mode_indicator_bg_color']) : '#767676',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_mode_indicator_font_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="mode_indicator_font_color"
               name="mode_indicator_font_color"
               value="%s"
               class="my-color-field"
               data-default-color="#ffffff"
               %s />',
        isset($this->options['mode_indicator_font_color']) ? esc_attr($this->options['mode_indicator_font_color']) : '#ffffff',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_toolbar_icon_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="toolbar_icon_color"
               name="toolbar_icon_color"
               value="%s"
               class="my-color-field"
               data-default-color="#212121"
               %s />',
        isset($this->options['toolbar_icon_color']) ? esc_attr($this->options['toolbar_icon_color']) : '#212121',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_top_bar_bg_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="top_bar_bg_color"
               name="top_bar_bg_color"
               value="%s"
               class="my-color-field"
               data-default-color="#00b294"
               %s />',
        isset($this->options['top_bar_bg_color']) ? esc_attr($this->options['top_bar_bg_color']) : '#00b294',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_send_button_font_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="send_button_font_color"
               name="send_button_font_color"
               value="%s"
               class="my-color-field"
               data-default-color="#ffffff"
               %s />',
        isset($this->options['send_button_font_color']) ? esc_attr($this->options['send_button_font_color']) : '#ffffff',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_chatbot_background_color_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="text"
               id="chatbot_background_color"
               name="chatbot_background_color"
               value="%s"
               class="my-color-field"
               data-default-color="#000000"
               %s />',
        isset($this->options['chatbot_background_color']) ? esc_attr($this->options['chatbot_background_color']) : '#000000',
        esc_attr($disabled)
    );

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_icon_color_callback() {
   $disabled = $this->is_activated ? '' : 'disabled';
   $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

   echo '<div class="' . esc_attr($class) . '">';
   echo sprintf(
       '<input type="text"
              id="icon_color"
              name="icon_color"
              value="%s"
              class="my-color-field"
              data-default-color="#ffffff"
              %s />',
       isset($this->options['icon_color']) ? esc_attr($this->options['icon_color']) : '#ffffff',
       esc_attr($disabled)
   );

   if (!$this->is_activated) {
       echo '<div class="pro-feature-overlay">';
       echo '<a href="https://mxchat.ai/" target="_blank">';
       echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
       echo '</a>';
       echo '</div>';
   }
   echo '</div>';
}

public function mxchat_custom_icon_callback() {
   $disabled = $this->is_activated ? '' : 'disabled';
   $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
   $custom_icon_url = isset($this->options['custom_icon']) ? esc_url($this->options['custom_icon']) : '';

   echo '<div class="' . esc_attr($class) . '">';
   echo sprintf(
       '<input type="url"
              id="custom_icon"
              name="custom_icon"
              value="%s"
              placeholder="%s"
              class="regular-text"
              %s />',
       $custom_icon_url,
       esc_attr__('Enter PNG URL', 'mxchat'),
       esc_attr($disabled)
   );

   // Preview container for the icon
   if (!empty($custom_icon_url)) {
       echo '<div class="icon-preview" style="margin-top: 10px;">';
       echo '<img src="' . esc_url($custom_icon_url) . '" alt="' . esc_attr__('Custom Icon Preview', 'mxchat') . '" style="max-width: 48px; height: auto;" />';
       echo '</div>';
   }

   echo '<p class="description">' . esc_html__('Upload your PNG icon and paste the URL here. Recommended size: 48x48 pixels.', 'mxchat') . '</p>';

   if (!$this->is_activated) {
       echo '<div class="pro-feature-overlay">';
       echo '<a href="https://mxchat.ai/" target="_blank">';
       echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
       echo '</a>';
       echo '</div>';
   }
   echo '</div>';
}

public function mxchat_title_icon_callback() {
   $disabled = $this->is_activated ? '' : 'disabled';
   $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
   // Fixed the variable reference - it was using custom_icon instead of title_icon
   $title_icon_url = isset($this->options['title_icon']) ? esc_url($this->options['title_icon']) : '';

   echo '<div class="' . esc_attr($class) . '">';
   echo sprintf(
       '<input type="url"
              id="title_icon"
              name="title_icon"
              value="%s"
              placeholder="%s"
              class="regular-text"
              %s />',
       $title_icon_url,
       esc_attr__('Enter PNG URL', 'mxchat'),
       esc_attr($disabled)
   );

   // Preview container for the icon
   if (!empty($title_icon_url)) {
       echo '<div class="icon-preview" style="margin-top: 10px;">';
       echo '<img src="' . esc_url($title_icon_url) . '" alt="' . esc_attr__('Title Icon Preview', 'mxchat') . '" style="max-width: 48px; height: auto;" />';
       echo '</div>';
   }

   echo '<p class="description">' . esc_html__('Upload your PNG icon and paste the URL here. Recommended size: 48x48 pixels.', 'mxchat') . '</p>';

   if (!$this->is_activated) {
       echo '<div class="pro-feature-overlay">';
       echo '<a href="https://mxchat.ai/" target="_blank">';
       echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
       echo '</a>';
       echo '</div>';
   }
   echo '</div>';
}

public function mxchat_chat_input_font_color_callback() {
   $disabled = $this->is_activated ? '' : 'disabled';
   $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

   echo '<div class="' . esc_attr($class) . '">';
   echo sprintf(
       '<input type="text"
              id="chat_input_font_color"
              name="chat_input_font_color"
              value="%s"
              class="my-color-field"
              data-default-color="#555555"
              %s />',
       isset($this->options['chat_input_font_color']) ? esc_attr($this->options['chat_input_font_color']) : '#555555',
       esc_attr($disabled)
   );

   if (!$this->is_activated) {
       echo '<div class="pro-feature-overlay">';
       echo '<a href="https://mxchat.ai/" target="_blank">';
       echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
       echo '</a>';
       echo '</div>';
   }
   echo '</div>';
}

public function mxchat_append_to_body_callback() {
    // Get value from options array, default to 'off'
    $append_to_body = isset($this->options['append_to_body']) ? $this->options['append_to_body'] : 'off';
    $checked = ($append_to_body === 'on') ? 'checked' : '';

    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="append_to_body" name="append_to_body" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';
    echo '<p class="description">' .
        esc_html__('Show chatbot automatically on all pages. When disabled, you can place the chatbot manually using shortcode [mxchat_chatbot floating="yes"].', 'mxchat') .
    '</p>';

}



public function mxchat_privacy_toggle_callback() {
    // Load from mxchat_options array
    $options = get_option('mxchat_options', []);

    // Get privacy toggle value with fallback
    $privacy_toggle = isset($options['privacy_toggle']) ? $options['privacy_toggle'] : 'off';
    $checked = ($privacy_toggle === 'on') ? 'checked' : '';

    // Get privacy text with fallback
    $privacy_text = isset($options['privacy_text'])
        ? $options['privacy_text']
        : __('By chatting, you agree to our <a href="https://example.com/privacy-policy" target="_blank">privacy policy</a>.', 'mxchat');

    // Output the toggle switch
    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="privacy_toggle" name="privacy_toggle" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';
    echo '<p class="description">' . esc_html__('Enable this option to display a privacy notice below the chat widget.', 'mxchat') . '</p>';

    // Output the custom text input field
    echo sprintf(
        '<textarea id="privacy_text" name="privacy_text" rows="5" cols="50" class="regular-text">%s</textarea>',
        esc_textarea($privacy_text)
    );
    echo '<p class="description">' . esc_html__('Enter the privacy policy text. You can include HTML links.', 'mxchat') . '</p>';
}


public function mxchat_complianz_toggle_callback() {
    // Load from mxchat_options array
    $options = get_option('mxchat_options', []);

    // Get complianz toggle value with fallback
    $complianz_toggle = isset($options['complianz_toggle']) ? $options['complianz_toggle'] : 'off';
    $checked = ($complianz_toggle === 'on') ? 'checked' : '';

    // Output the toggle switch
    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="complianz_toggle" name="complianz_toggle" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';

    echo '<p class="description">' . esc_html__('Enable this option to apply Complianz consent logic to the chatbot (must have Complianz Plugin).', 'mxchat') . '</p>';
}

public function mxchat_link_target_toggle_callback() {
    // Load from mxchat_options array
    $options = get_option('mxchat_options', []);

    // Get link target toggle value with fallback
    $link_target_toggle = isset($options['link_target_toggle']) ? $options['link_target_toggle'] : 'off';
    $checked = ($link_target_toggle === 'on') ? 'checked' : '';

    // Output the toggle switch
    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="link_target_toggle" name="link_target_toggle" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';
    echo '<p class="description">' . esc_html__('Enable to open links in a new tab (default is to open in the same tab).', 'mxchat') . '</p>';
}

public function mxchat_chat_persistence_toggle_callback() {
    // Load from mxchat_options array
    $options = get_option('mxchat_options', []);

    // Get chat persistence toggle value with fallback
    $chat_persistence_toggle = isset($options['chat_persistence_toggle']) ? $options['chat_persistence_toggle'] : 'off';
    $checked = ($chat_persistence_toggle === 'on') ? 'checked' : '';

    // Output the toggle switch
    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="chat_persistence_toggle" name="chat_persistence_toggle" value="on" %s />',
        esc_attr($checked)
    );
    echo '<span class="slider"></span>';
    echo '</label>';

    echo '<p class="description">' . esc_html__('Enable to keep chat history when users navigate tabs or return to the site within 24 hours.', 'mxchat') . '</p>';
}

public function mxchat_popular_question_1_callback() {
    // Load the full plugin options array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the specific option for popular_question_1
    $popular_question_1 = isset($all_options['popular_question_1']) ? $all_options['popular_question_1'] : '';

    // Render the input field
    printf(
        '<input type="text" id="popular_question_1" name="popular_question_1" value="%s" placeholder="%s" class="regular-text" />',
        esc_attr($popular_question_1),
        esc_attr__('Enter Quick Question 1', 'mxchat')
    );

    // Add a description for the field
    echo '<p class="description">' . esc_html__('This will be the first Quick Question in the chatbot, displayed above the input field.', 'mxchat') . '</p>';
}


public function mxchat_popular_question_2_callback() {
    // Load the full plugin options array
    $all_options = get_option('mxchat_options', []);

    // Retrieve the specific option for popular_question_2
    $popular_question_2 = isset($all_options['popular_question_2']) ? $all_options['popular_question_2'] : '';

    // Render the input field
    printf(
        '<input type="text" id="popular_question_2" name="popular_question_2" value="%s" placeholder="%s" class="regular-text" />',
        esc_attr($popular_question_2),
        esc_attr__('Enter Quick Question 2', 'mxchat')
    );

    // Add a description for the field
    echo '<p class="description">' . esc_html__('This will be the second Quick Question in the chatbot.', 'mxchat') . '</p>';
}


public function mxchat_popular_question_3_callback() {
   // Load the full plugin options array
   $all_options = get_option('mxchat_options', []);

   // Retrieve the specific option for popular_question_3
   $popular_question_3 = isset($all_options['popular_question_3']) ? $all_options['popular_question_3'] : '';

   // Render the input field
   printf(
       '<input type="text" id="popular_question_3" name="popular_question_3" value="%s" placeholder="%s" class="regular-text" />',
       esc_attr($popular_question_3),
       esc_attr(__('Enter Quick Question 3', 'mxchat'))
   );

   // Add a description for the field
   echo '<p class="description">' . esc_html__('This will be the third Quick Question in the chatbot.', 'mxchat') . '</p>';
}

public function mxchat_additional_popular_questions_callback() {
    $options = get_option('mxchat_options', []);
    $additional_questions = isset($options['additional_popular_questions'])
        ? $options['additional_popular_questions']
        : get_option('additional_popular_questions', array());

    echo '<div id="mxchat-additional-questions-container">';
    if (!empty($additional_questions)) {
        foreach ($additional_questions as $index => $question) {
            printf(
                '<div class="mxchat-question-row">
                    <input type="text" name="additional_popular_questions[]"
                           value="%s"
                           placeholder="%s"
                           class="regular-text mxchat-question-input"
                           data-question-index="%d" />
                    <button type="button" class="button mxchat-remove-question"
                            aria-label="%s">%s</button>
                </div>',
                esc_attr($question),
                esc_attr(sprintf(__('Enter Additional Quick Question %d', 'mxchat'), $index + 4)),
                $index,
                esc_attr(__('Remove question', 'mxchat')),
                esc_html__('Remove', 'mxchat')
            );
        }
    } else {
        printf(
            '<div class="mxchat-question-row">
                <input type="text" name="additional_popular_questions[]"
                       value=""
                       placeholder="%s"
                       class="regular-text mxchat-question-input"
                       data-question-index="0" />
                <button type="button" class="button mxchat-remove-question"
                        aria-label="%s">%s</button>
            </div>',
            esc_attr(__('Enter Additional Quick Question 4', 'mxchat')),
            esc_attr(__('Remove question', 'mxchat')),
            esc_html__('Remove', 'mxchat')
        );
    }
    echo '</div>';
    printf(
        '<button type="button" class="button mxchat-add-question" aria-label="%s">%s</button>',
        esc_attr(__('Add question', 'mxchat')),
        esc_html__('Add Question', 'mxchat')
    );
    echo '<p class="description">' . esc_html__('Add as many Quick Questions as you need.', 'mxchat') . '</p>';
    echo '</div>';
}

public function mxchat_brave_api_key_callback() {
    $brave_api_key = isset($this->options['brave_api_key']) ? esc_attr($this->options['brave_api_key']) : '';

    echo '<div class="api-key-wrapper">';
    echo sprintf(
        '<input type="password" id="brave_api_key" name="brave_api_key" value="%s" class="regular-text" />',
        $brave_api_key
    );
    echo '<button type="button" id="toggleBraveApiKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '</div>';
    echo '<p class="description">' . __('Enter your Brave Search API Key here. (See FAQ for details)', 'mxchat') . '</p>';
}

public function mxchat_brave_image_count_callback() {
    $brave_image_count = isset($this->options['brave_image_count'])
        ? intval($this->options['brave_image_count'])
        : 4;

    echo sprintf(
        '<input type="number" id="brave_image_count" name="brave_image_count"
               value="%d" min="1" max="6" class="small-text" />',
        $brave_image_count
    );
    echo '<p class="description">' . __('Select the number of images to return (1-6).', 'mxchat') . '</p>';
}

public function mxchat_brave_safe_search_callback() {
    $brave_safe_search = isset($this->options['brave_safe_search'])
        ? esc_attr($this->options['brave_safe_search'])
        : 'strict';

    echo '<select id="brave_safe_search" name="brave_safe_search">';
    echo sprintf(
        '<option value="strict" %s>%s</option>',
        selected($brave_safe_search, 'strict', false),
        __('Strict', 'mxchat')
    );
    echo sprintf(
        '<option value="off" %s>%s</option>',
        selected($brave_safe_search, 'off', false),
        __('Off', 'mxchat')
    );
    echo '</select>';
    echo '<p class="description">' .
         esc_html__('Set the Safe Search level for image searches. Brave Search only supports "Strict" and "Off" options.', 'mxchat') .
         '</p>';
}

public function mxchat_brave_news_count_callback() {
    $brave_news_count = isset($this->options['brave_news_count'])
        ? intval($this->options['brave_news_count'])
        : 3;

    echo sprintf(
        '<input type="number" id="brave_news_count" name="brave_news_count"
               value="%d" min="1" max="10" class="small-text" />',
        $brave_news_count
    );
    echo '<p class="description">' . esc_html__('Select the number of news articles to retrieve (1-10).', 'mxchat') . '</p>';
}

public function mxchat_brave_country_callback() {
    $brave_country = isset($this->options['brave_country'])
        ? esc_attr($this->options['brave_country'])
        : 'us';

    echo sprintf(
        '<input type="text" id="brave_country" name="brave_country"
               value="%s" maxlength="2" class="small-text" />',
        $brave_country
    );
    echo '<p class="description">' . esc_html__('Enter the country code (e.g., "us" for United States).', 'mxchat') . '</p>';
}

public function mxchat_brave_language_callback() {
    $brave_language = isset($this->options['brave_language'])
        ? esc_attr($this->options['brave_language'])
        : 'en';

    echo sprintf(
        '<input type="text" id="brave_language" name="brave_language"
               value="%s" maxlength="2" class="small-text" />',
        $brave_language
    );
    echo '<p class="description">' . esc_html__('Enter the language code (e.g., "en" for English).', 'mxchat') . '</p>';
}





// Section Callback
public function mxchat_pdf_intent_section_callback() {
    echo '<p>' . esc_html__('Configure the intent settings for the Chat with PDF feature.', 'mxchat') . '</p>';
}

public function mxchat_chat_toolbar_toggle_callback() {
   // Get chat toolbar toggle value with fallback
   $chat_toolbar_toggle = isset($this->options['chat_toolbar_toggle']) ? $this->options['chat_toolbar_toggle'] : 'off';
   $checked = ($chat_toolbar_toggle === 'on') ? 'checked' : '';

   // Check if the plugin is activated (paid feature)
   $disabled = $this->is_activated ? '' : 'disabled';
   $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

   echo '<div class="' . esc_attr($class) . '">';

   // Output the toggle switch
   echo '<label class="toggle-switch">';
   echo sprintf(
       '<input type="checkbox" id="chat_toolbar_toggle" name="chat_toolbar_toggle" value="on" %s %s />',
       esc_attr($checked),
       esc_attr($disabled)
   );
   echo '<span class="slider"></span>';
   echo '</label>';

   // Pro feature overlay
   if (!$this->is_activated) {
       echo '<div class="pro-feature-overlay">';
       echo '<a href="https://mxchat.ai/" target="_blank">';
       echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
       echo '</a>';
       echo '</div>';
   }

   echo '</div>';
   echo '<p class="description">' . esc_html__('Enable to display the chat toolbar, adding two icons below the chatbot input field for uploading PDF and Word documents (default is hidden).', 'mxchat') . '</p>';
}


public function mxchat_pdf_intent_trigger_text_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $default_text = __("Please provide the URL to the PDF you'd like to discuss.", 'mxchat');

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<textarea id="pdf_intent_trigger_text"
                  name="pdf_intent_trigger_text"
                  rows="3"
                  cols="50"
                  placeholder="%s"
                  %s>%s</textarea>',
        esc_attr__('Enter trigger text', 'mxchat'),
        esc_attr($disabled),
        isset($this->options['pdf_intent_trigger_text'])
            ? esc_textarea($this->options['pdf_intent_trigger_text'])
            : esc_textarea($default_text)
    );
    echo '<p class="description">' . esc_html__('Text displayed when the intent is triggered.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_pdf_intent_success_text_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $default_text = __("I've processed the PDF. What questions do you have about it?", 'mxchat');

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<textarea id="pdf_intent_success_text"
                  name="pdf_intent_success_text"
                  rows="3"
                  cols="50"
                  placeholder="%s"
                  %s>%s</textarea>',
        esc_attr__('Enter success text', 'mxchat'),
        esc_attr($disabled),
        isset($this->options['pdf_intent_success_text'])
            ? esc_textarea($this->options['pdf_intent_success_text'])
            : esc_textarea($default_text)
    );
    echo '<p class="description">' . esc_html__('Text displayed when the intent is successful.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_pdf_intent_error_text_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $default_text = __("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat');

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<textarea id="pdf_intent_error_text"
                  name="pdf_intent_error_text"
                  rows="3"
                  cols="50"
                  placeholder="%s"
                  %s>%s</textarea>',
        esc_attr__('Enter error text', 'mxchat'),
        esc_attr($disabled),
        isset($this->options['pdf_intent_error_text'])
            ? esc_textarea($this->options['pdf_intent_error_text'])
            : esc_textarea($default_text)
    );
    echo '<p class="description">' . esc_html__('Text displayed when an error occurs during the intent.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_pdf_max_pages_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69;

    echo '<div class="' . esc_attr($class) . '">';
    echo sprintf(
        '<input type="range"
               id="pdf_max_pages"
               name="pdf_max_pages"
               min="1"
               max="69"
               value="%d"
               %s
               class="range-slider" />',
        esc_attr($max_pages),
        esc_attr($disabled)
    );
    echo '<span id="pdf_max_pages_output">' . esc_html($max_pages) . '</span>';
    echo '<p class="description">' . esc_html__('Set the maximum number of document pages users can upload for processing. (1-69 pages)', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank">';
        echo '<img src="' . esc_url(plugin_dir_url(__FILE__) . '../images/pro-only-dark.png') . '" alt="' . esc_attr__('Pro Only', 'mxchat') . '" />';
        echo '</a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_status_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $status = isset($this->options['live_agent_status']) ? $this->options['live_agent_status'] : 'off';

    echo '<div class="' . esc_attr($class) . '">';
    echo '<label class="toggle-switch">';
    echo sprintf(
        '<input type="checkbox" id="live_agent_status" name="live_agent_status" value="on" %s %s />',
        checked($status, 'on', false),
        esc_attr($disabled)
    );
    echo '<span class="slider"></span>';
    echo '</label>';
    echo '<label for="live_agent_status" class="mxchat-status-label">';
    echo '<span class="status-text">' . ($status === 'on' ? esc_html__('Online', 'mxchat') : esc_html__('Offline', 'mxchat')) . '</span>';
    echo '</label>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}


// Away Message Callback
public function mxchat_live_agent_away_message_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $message = isset($this->options['live_agent_away_message'])
        ? $this->options['live_agent_away_message']
        : __('Sorry, live agents are currently unavailable. I can continue helping you as an AI assistant.', 'mxchat');

    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<textarea id="live_agent_away_message" name="live_agent_away_message" rows="3" cols="50" %s>%s</textarea>',
        esc_attr($disabled),
        esc_textarea($message)
    );
    echo '<p class="description">' . esc_html__('Message shown when live agents are offline.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_notification_message_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $message = isset($this->options['live_agent_notification_message'])
        ? $this->options['live_agent_notification_message']
        : __('Live agent has been notified.', 'mxchat');

    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<textarea id="live_agent_notification_message" name="live_agent_notification_message" rows="3" cols="50" %s>%s</textarea>',
        esc_attr($disabled),
        esc_textarea($message)
    );
    echo '<p class="description">' . esc_html__('Message shown when live transfer activated.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_webhook_url_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';
    $webhook_url = isset($this->options['live_agent_webhook_url'])
        ? esc_url($this->options['live_agent_webhook_url'])
        : esc_url(get_option('live_agent_webhook_url', ''));

    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<input type="password" id="live_agent_webhook_url" name="live_agent_webhook_url" value="%s" class="regular-text" %s />',
        $webhook_url,
        esc_attr($disabled)
    );
    echo '<button type="button" id="toggleWebhookUrlVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '<p class="description">' . esc_html__('Enter your Slack webhook URL for live agent notifications.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}


public function mxchat_similarity_threshold_callback() {
    // Load from mxchat_options array
    $options = get_option('mxchat_options', []);

    // Get value with backwards compatibility
    $threshold = isset($options['similarity_threshold'])
        ? $options['similarity_threshold']
        : get_option('mxchat_similarity_threshold', 80);

    echo '<div class="slider-container">';
    echo sprintf(
        '<input type="range"
               id="similarity_threshold"
               name="similarity_threshold"
               min="70"
               max="85"
               step="1"
               value="%s"
               class="range-slider" />',
        esc_attr($threshold)
    );
    echo sprintf(
        '<span id="threshold_value" class="range-value">%s</span>',
        esc_html($threshold)
    );
    echo '</div>';

    echo '<p class="description">';
    echo esc_html__('Set the similarity threshold (recommended: 75) to balance accuracy; too high might limit your bot\'s ability to find relevant knowledge.', 'mxchat');
    echo '</p>';
}



public function mxchat_live_agent_secret_key_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<input type="password" id="live_agent_secret_key" name="live_agent_secret_key" value="%s" class="regular-text" %s />',
        isset($this->options['live_agent_secret_key']) ? esc_attr($this->options['live_agent_secret_key']) : '',
        esc_attr($disabled)
    );
    echo '<button type="button" id="toggleSecretKeyVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '<p class="description">' . esc_html__('Secret key for validating Slack requests. Keep this secure.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_live_agent_bot_token_callback() {
    $disabled = $this->is_activated ? '' : 'disabled';
    $class = $this->is_activated ? 'pro-feature-wrapper active' : 'pro-feature-wrapper inactive';

    echo '<div class="' . esc_attr($class) . '">';
    printf(
        '<input type="password" id="live_agent_bot_token" name="live_agent_bot_token" value="%s" class="regular-text" %s />',
        isset($this->options['live_agent_bot_token']) ? esc_attr($this->options['live_agent_bot_token']) : '',
        esc_attr($disabled)
    );
    echo '<button type="button" id="toggleBotTokenVisibility">' . esc_html__('Show', 'mxchat') . '</button>';
    echo '<p class="description">' . esc_html__('Your Slack Bot OAuth Token (starts with xoxb-). Keep this secure.', 'mxchat') . '</p>';

    if (!$this->is_activated) {
        echo '<div class="pro-feature-overlay">';
        echo '<a href="https://mxchat.ai/" target="_blank"><img src="' . plugin_dir_url(__FILE__) . '../images/pro-only-dark.png" alt="' . esc_attr__('Pro Only', 'mxchat') . '" /></a>';
        echo '</div>';
    }
    echo '</div>';
}

public function mxchat_enqueue_admin_assets() {
    wp_enqueue_style('wp-color-picker');

    // Get the plugin version or file modification time for cache busting
    $plugin_version = '2.0.5'; // Replace this with your plugin's version

    // File paths
    $color_picker_js_path = plugin_dir_path(__FILE__) . '../js/my-color-picker.js';
    $embedding_check_js_path = plugin_dir_path(__FILE__) . '../js/embedding-check.js';
    $admin_css_path = plugin_dir_path(__FILE__) . '../css/admin-style.css';
    $knowledge_css_path = plugin_dir_path(__FILE__) . '../css/knowledge-style.css';
    $intent_css_path = plugin_dir_path(__FILE__) . '../css/intent-style.css';

    // Check if files exist and get modification times
    $color_picker_version = file_exists($color_picker_js_path) ? filemtime($color_picker_js_path) : $plugin_version;
    $embedding_check_version = file_exists($embedding_check_js_path) ? filemtime($embedding_check_js_path) : $plugin_version;
    $admin_css_version = file_exists($admin_css_path) ? filemtime($admin_css_path) : $plugin_version;
    $knowledge_css_version = file_exists($knowledge_css_path) ? filemtime($knowledge_css_path) : $plugin_version;
    $intent_css_version = file_exists($intent_css_path) ? filemtime($intent_css_path) : $plugin_version;

    // Enqueue scripts and styles with corrected paths
    wp_enqueue_script(
        'mxchat-color-picker',
        plugin_dir_url(__FILE__) . '../js/my-color-picker.js',
        array('wp-color-picker'),
        $color_picker_version,
        true
    );

    wp_enqueue_script(
        'mxchat-embedding-check',
        plugin_dir_url(__FILE__) . '../js/embedding-check.js',
        array(),
        $embedding_check_version,
        true
    );

    wp_enqueue_script(
        'mxchat-admin-js',
        plugin_dir_url(__FILE__) . '../js/mxchat-admin.js',
        array('jquery'),
        $plugin_version,
        true
    );

    wp_localize_script('mxchat-admin-js', 'mxchatAdmin', array(
        'ajax_url' => admin_url('admin-ajax.php'),
        'license_nonce' => wp_create_nonce('mxchat_activate_license_nonce'),
        'inline_edit_nonce' => wp_create_nonce('mxchat_save_inline_nonce'),
        'setting_nonce' => wp_create_nonce('mxchat_save_setting_nonce'),
        'export_nonce' => wp_create_nonce('mxchat_export_transcripts'),
    ));

    // Enqueue the admin CSS
    wp_enqueue_style(
        'mxchat-admin-css',
        plugin_dir_url(__FILE__) . '../css/admin-style.css',
        array(),
        $admin_css_version
    );
    
    if (isset($_GET['page']) && $_GET['page'] === 'mxchat-transcripts') {
        wp_enqueue_style(
            'mxchat-chat-transcripts-css',
            plugin_dir_url(__FILE__) . '../css/chat-transcripts.css',
            array(),
            $transcripts_css_version
        );
        
        wp_enqueue_script(
            'mxchat-transcripts-js',
            plugin_dir_url(__FILE__) . '../js/mxchat_transcripts.js',
            array('jquery'),
            $transcripts_js_version,
            true
        );
    }
    
    wp_enqueue_style(
        'mxchat-knowledge-css',
        plugin_dir_url(__FILE__) . '../css/knowledge-style.css',
        array(),
        $knowledge_css_version
    );


    wp_enqueue_style(
        'mxchat-intent-css',
        plugin_dir_url(__FILE__) . '../css/intent-style.css',
        array(),
        $intent_css_version
    );

    // IMPORTANT: Use the same script handle as above for localizing mxchatPromptsAdmin
    wp_localize_script( 'mxchat-admin-js', 'mxchatPromptsAdmin', array(
        'ajax_url'                => admin_url( 'admin-ajax.php' ),
        'prompts_setting_nonce'   => wp_create_nonce( 'mxchat_prompts_setting_nonce' ),
    ) );

    // Localize the script for color picker and settings
    wp_localize_script('mxchat-color-picker', 'mxchatStyleSettings', array(
        'ajax_url' => admin_url('admin-ajax.php'),
        'link_target_toggle' => $this->options['link_target_toggle'] ?? 'off',
        'user_message_bg_color' => $this->options['user_message_bg_color'] ?? '#fff',
        'user_message_font_color' => $this->options['user_message_font_color'] ?? '#212121',
        'bot_message_bg_color' => $this->options['bot_message_bg_color'] ?? '#212121',
        'bot_message_font_color' => $this->options['bot_message_font_color'] ?? '#fff',
        'top_bar_bg_color' => $this->options['top_bar_bg_color'] ?? '#212121',
        'send_button_font_color' => $this->options['send_button_font_color'] ?? '#212121',
        'close_button_color' => $this->options['close_button_color'] ?? '#fff',
        'chatbot_background_color' => $this->options['chatbot_background_color'] ?? '#212121',
        'icon_color' => $this->options['icon_color'] ?? '#fff',
        'chat_input_font_color' => $this->options['chat_input_font_color'] ?? '#212121',
        'pre_chat_message' => $this->options['pre_chat_message'] ?? esc_html__('Hey there! Ask me anything!', 'mxchat'),
        'rate_limit_message' => $this->options['rate_limit_message'] ?? esc_html__('Rate limit exceeded. Please try again later.', 'mxchat'),
        'loops_api_key' => $this->options['loops_api_key'] ?? '',
        'loops_mailing_list' => $this->options['loops_mailing_list'] ?? '',
        'triggered_phrase_response' => $this->options['triggered_phrase_response'] ?? esc_html__('Would you like to join our mailing list? Please provide your email below.', 'mxchat'),
        'email_capture_response' => $this->options['email_capture_response'] ?? esc_html__('Thank you for providing your email! You\'ve been added to our list.', 'mxchat'),
        'pdf_intent_trigger_text' => $this->options['pdf_intent_trigger_text'] ?? esc_html__("Please provide the URL to the PDF you'd like to discuss.", 'mxchat'),
        'pdf_intent_success_text' => $this->options['pdf_intent_success_text'] ?? esc_html__("I've processed the PDF. What questions do you have about it?", 'mxchat'),
        'pdf_intent_error_text' => $this->options['pdf_intent_error_text'] ?? esc_html__("Sorry, I couldn't process the PDF. Please ensure it's a valid file.", 'mxchat'),
        'pdf_max_pages' => $this->options['pdf_max_pages'] ?? 69,
        'live_agent_webhook_url' => $this->options['live_agent_webhook_url'] ?? '',
        'live_agent_secret_key' => $this->options['live_agent_secret_key'] ?? '',
        'live_agent_bot_token' => $this->options['live_agent_bot_token'] ?? '',
        'live_agent_message_bg_color' => $this->options['live_agent_message_bg_color'] ?? '#ffffff',
        'live_agent_message_font_color' => $this->options['live_agent_message_font_color'] ?? '#333333',
        'chat_toolbar_toggle' => $this->options['chat_toolbar_toggle'] ?? 'off',
        'mode_indicator_bg_color' => $this->options['mode_indicator_bg_color'] ?? '#767676',
        'mode_indicator_font_color' => $this->options['mode_indicator_font_color'] ?? '#ffffff',
        'toolbar_icon_color' => $this->options['toolbar_icon_color'] ?? '#212121',
    ));
}


public function mxchat_sanitize($input) {
    $new_input = array();

    if (isset($input['api_key'])) {
        $new_input['api_key'] = sanitize_text_field($input['api_key']);
    }

    if (isset($input['similarity_threshold'])) {
        $new_input['similarity_threshold'] = absint($input['similarity_threshold']); // Ensure it's an integer
        $new_input['similarity_threshold'] = min(max($new_input['similarity_threshold'], 70), 85); // Enforce range
    }

    if (isset($input['xai_api_key'])) {
        $new_input['xai_api_key'] = sanitize_text_field($input['xai_api_key']);
    }

    if (isset($input['claude_api_key'])) {
        $new_input['claude_api_key'] = sanitize_text_field($input['claude_api_key']);
    }

    if (isset($input['deepseek_api_key'])) {
        $new_input['deepseek_api_key'] = sanitize_text_field($input['deepseek_api_key']);
    }

    if (isset($input['enable_woocommerce_integration'])) {
        $new_input['enable_woocommerce_integration'] = $input['enable_woocommerce_integration'] === 'on' ? 'on' : 'off';
    }

    if (isset($input['privacy_toggle'])) {
        $new_input['privacy_toggle'] = $input['privacy_toggle'];
    }

    if (isset($input['complianz_toggle'])) {
        $new_input['complianz_toggle'] = $input['complianz_toggle'];
    }

    // Handle custom privacy text input
    if (isset($input['privacy_text'])) {
        // Allow basic HTML for links
        $new_input['privacy_text'] = wp_kses_post($input['privacy_text']);
    }

    if (isset($input['system_prompt_instructions'])) {
        $new_input['system_prompt_instructions'] = sanitize_textarea_field($input['system_prompt_instructions']);
    }

    if (isset($input['mxchat_pro_email'])) {
        $new_input['mxchat_pro_email'] = sanitize_email($input['mxchat_pro_email']);
    }

    if (isset($input['mxchat_activation_key'])) {
        $new_input['mxchat_activation_key'] = sanitize_text_field($input['mxchat_activation_key']);
    }

    if (isset($input['append_to_body'])) {
        $new_input['append_to_body'] = $input['append_to_body'] === 'on' ? 'on' : 'off';
    }

    if (isset($input['top_bar_title'])) {
        $new_input['top_bar_title'] = sanitize_text_field($input['top_bar_title']);
    }

    if (isset($input['enable_email_block'])) {
        $new_input['enable_email_block'] = sanitize_text_field($input['enable_email_block']);
    }

    if (isset($input['email_blocker_header_content'])) {
        // wp_kses_post() allows standard HTML tags permitted by WordPress
        $new_input['email_blocker_header_content'] = wp_kses_post($input['email_blocker_header_content']);
    }
    if (isset($input['email_blocker_button_text'])) {
        $new_input['email_blocker_button_text'] = sanitize_text_field($input['email_blocker_button_text']);
    }

    if (isset($input['intro_message'])) {
        $new_input['intro_message'] = sanitize_textarea_field($input['intro_message']);  // Changed from sanitize_text_field
    }

    if (isset($input['input_copy'])) {
        $new_input['input_copy'] = sanitize_text_field($input['input_copy']);
    }

    if (isset($input['rate_limit_message'])) {
        $new_input['rate_limit_message'] = sanitize_text_field($input['rate_limit_message']);
    }

    if (isset($input['rate_limit_logged_out'])) {
        $allowed_limits = array('1', '3', '5', '10', '15', '20', '100', 'unlimited'); // Add 'unlimited' to allowed values
        $rate_limit = sanitize_text_field($input['rate_limit_logged_out']);

        if (in_array($rate_limit, $allowed_limits, true)) {
            $new_input['rate_limit_logged_out'] = $rate_limit;
        } else {
            $new_input['rate_limit_logged_out'] = '10'; // Default for logged-out users
        }
    }

    // Handle role rate limits
    if (isset($input['role_rate_limits']) && is_array($input['role_rate_limits'])) {
        $allowed_limits = array('1', '3', '5', '10', '15', '20', '100', 'unlimited');
        $new_input['role_rate_limits'] = array();

        foreach ($input['role_rate_limits'] as $role_id => $rate_limit) {
            $rate_limit = sanitize_text_field($rate_limit);
            if (in_array($rate_limit, $allowed_limits, true)) {
                $new_input['role_rate_limits'][$role_id] = $rate_limit;
            } else {
                $new_input['role_rate_limits'][$role_id] = '100'; // Default
            }
        }
    }

    if (isset($input['pre_chat_message'])) {
        $new_input['pre_chat_message'] = sanitize_textarea_field($input['pre_chat_message']);
    }

    if (isset($input['model'])) {
        $allowed_models = array(
            'grok-beta',
            'grok-2',
            'deepseek-chat',
            'claude-3-5-sonnet-20241022',
            'claude-3-opus-20240229',
            'claude-3-sonnet-20240229',
            'claude-3-haiku-20240307',
            'gpt-4o',
            'gpt-4o-mini',
            'gpt-4-turbo',
            'gpt-4',
            'gpt-3.5-turbo',
        );
        if (in_array($input['model'], $allowed_models)) {
            $new_input['model'] = sanitize_text_field($input['model']);
        }
    }

    if (isset($input['close_button_color'])) {
        $new_input['close_button_color'] = sanitize_hex_color($input['close_button_color']);
    }

    if (isset($input['chatbot_bg_color'])) {
        $new_input['chatbot_bg_color'] = sanitize_hex_color($input['chatbot_bg_color']);
    }

    if (isset($input['woocommerce_consumer_key'])) {
        $new_input['woocommerce_consumer_key'] = sanitize_text_field($input['woocommerce_consumer_key']);
    }

    if (isset($input['woocommerce_consumer_secret'])) {
        $new_input['woocommerce_consumer_secret'] = sanitize_text_field($input['woocommerce_consumer_secret']);
    }

    if (isset($input['user_message_bg_color'])) {
        $new_input['user_message_bg_color'] = sanitize_hex_color($input['user_message_bg_color']);
    }

    if (isset($input['user_message_font_color'])) {
        $new_input['user_message_font_color'] = sanitize_hex_color($input['user_message_font_color']);
    }

    if (isset($input['bot_message_bg_color'])) {
        $new_input['bot_message_bg_color'] = sanitize_hex_color($input['bot_message_bg_color']);
    }

    if (isset($input['bot_message_font_color'])) {
        $new_input['bot_message_font_color'] = sanitize_hex_color($input['bot_message_font_color']);
    }

    if (isset($input['live_agent_message_bg_color'])) {
        $new_input['live_agent_message_bg_color'] = sanitize_hex_color($input['live_agent_message_bg_color']);
    }

    if (isset($input['live_agent_message_font_color'])) {
        $new_input['live_agent_message_font_color'] = sanitize_hex_color($input['live_agent_message_font_color']);
    }

    if (isset($input['mode_indicator_bg_color'])) {
        $new_input['mode_indicator_bg_color'] = sanitize_hex_color($input['mode_indicator_bg_color']);
    }

    if (isset($input['mode_indicator_font_color'])) {
        $new_input['mode_indicator_font_color'] = sanitize_hex_color($input['mode_indicator_font_color']);
    }

    if (isset($input['toolbar_icon_color'])) {
        $new_input['toolbar_icon_color'] = sanitize_hex_color($input['toolbar_icon_color']);
    }

    if (isset($input['top_bar_bg_color'])) {
        $new_input['top_bar_bg_color'] = sanitize_hex_color($input['top_bar_bg_color']);
    }

    if (isset($input['send_button_font_color'])) {
        $new_input['send_button_font_color'] = sanitize_hex_color($input['send_button_font_color']);
    }

    if (isset($input['chatbot_background_color'])) {
        $new_input['chatbot_background_color'] = sanitize_hex_color($input['chatbot_background_color']);
    }

    if (isset($input['icon_color'])) {
        $new_input['icon_color'] = sanitize_hex_color($input['icon_color']);
    }

    if (isset($input['custom_icon'])) {
        $new_input['custom_icon'] = esc_url_raw($input['custom_icon']);
    }

    if (isset($input['title_icon'])) {
        $new_input['title_icon'] = esc_url_raw($input['title_icon']);
    }

    if (isset($input['chat_input_font_color'])) {
        $new_input['chat_input_font_color'] = sanitize_hex_color($input['chat_input_font_color']);
    }

    // Sanitize link_target_toggle
    if (isset($input['link_target_toggle'])) {
        $new_input['link_target_toggle'] = $input['link_target_toggle'] === 'on' ? 'on' : 'off';
    }

    // Sanitize Loops API Key
    if (isset($input['loops_api_key'])) {
        $new_input['loops_api_key'] = sanitize_text_field($input['loops_api_key']);
    }

    if (isset($input['chat_persistence_toggle'])) {
        $new_input['chat_persistence_toggle'] = $input['chat_persistence_toggle'] === 'on' ? 'on' : 'off';
    }

    if (isset($input['popular_question_1'])) {
        $new_input['popular_question_1'] = sanitize_text_field($input['popular_question_1']);
    }

    if (isset($input['popular_question_2'])) {
        $new_input['popular_question_2'] = sanitize_text_field($input['popular_question_2']);
    }

    if (isset($input['popular_question_3'])) {
        $new_input['popular_question_3'] = sanitize_text_field($input['popular_question_3']);
    }

    if (isset($input['additional_popular_questions']) && is_array($input['additional_popular_questions'])) {
        $new_input['additional_popular_questions'] = array_map('sanitize_text_field', $input['additional_popular_questions']);
    }

    // Sanitize Loops Mailing List
    if (isset($input['loops_mailing_list'])) {
        $new_input['loops_mailing_list'] = sanitize_text_field($input['loops_mailing_list']);
    }

    // Sanitize Triggered Phrase Response
    if (isset($input['triggered_phrase_response'])) {
        $new_input['triggered_phrase_response'] = wp_kses_post($input['triggered_phrase_response']);
    }

    if (isset($input['email_capture_response'])) {
        $new_input['email_capture_response'] = sanitize_textarea_field($input['email_capture_response']);
    }

    // Sanitize Brave Search Settings
    if (isset($input['brave_api_key'])) {
        $new_input['brave_api_key'] = sanitize_text_field($input['brave_api_key']);
    }

    if (isset($input['brave_image_count'])) {
        $image_count = intval($input['brave_image_count']);
        $new_input['brave_image_count'] = ($image_count >=1 && $image_count <=6) ? $image_count : 4;
    }

    if (isset($input['brave_safe_search'])) {
        $allowed = array('strict', 'off');
        $new_input['brave_safe_search'] = in_array($input['brave_safe_search'], $allowed, true) ? $input['brave_safe_search'] : 'strict';
    }

    if (isset($input['brave_news_count'])) {
        $news_count = intval($input['brave_news_count']);
        $new_input['brave_news_count'] = ($news_count >=1 && $news_count <=10) ? $news_count : 3;
    }

    if (isset($input['brave_country'])) {
        $new_input['brave_country'] = sanitize_text_field($input['brave_country']);
    }

    if (isset($input['brave_language'])) {
        $new_input['brave_language'] = sanitize_text_field($input['brave_language']);
    }

    if (isset($input['chat_toolbar_toggle'])) {
        $new_input['chat_toolbar_toggle'] = $input['chat_toolbar_toggle'] === 'on' ? 'on' : 'off';
    }

    if (isset($input['pdf_intent_trigger_text'])) {
        $new_input['pdf_intent_trigger_text'] = sanitize_text_field($input['pdf_intent_trigger_text']);
    }

    if (isset($input['pdf_intent_success_text'])) {
        $new_input['pdf_intent_success_text'] = sanitize_text_field($input['pdf_intent_success_text']);
    }

    if (isset($input['pdf_intent_error_text'])) {
        $new_input['pdf_intent_error_text'] = sanitize_text_field($input['pdf_intent_error_text']);
    }

    if (isset($input['pdf_max_pages'])) {
        $new_input['pdf_max_pages'] = intval($input['pdf_max_pages']);
        if ($new_input['pdf_max_pages'] < 1 || $new_input['pdf_max_pages'] > 69) {
            $new_input['pdf_max_pages'] = 69; // Default to 69 if out of range
        }
    }

    if (isset($input['live_agent_webhook_url'])) {
        $new_input['live_agent_webhook_url'] = esc_url_raw($input['live_agent_webhook_url']);
    }
    if (isset($input['live_agent_secret_key'])) {
        $new_input['live_agent_secret_key'] = sanitize_text_field($input['live_agent_secret_key']);
    }

    // Live Agent Integration
    if (isset($input['live_agent_bot_token'])) {
        $new_input['live_agent_bot_token'] = sanitize_text_field($input['live_agent_bot_token']);
    }

    if (isset($input['live_agent_status'])) {
        $new_input['live_agent_status'] = ($input['live_agent_status'] === 'on') ? 'on' : 'off';
    }
    if (isset($input['live_agent_away_message'])) {
        $new_input['live_agent_away_message'] = sanitize_textarea_field($input['live_agent_away_message']);
    }
    if (isset($input['live_agent_notification_message'])) {
        $new_input['live_agent_notification_message'] = sanitize_textarea_field($input['live_agent_notification_message']);
    }

    return $new_input;
}


    // Method to append the chatbot to the body
    public function mxchat_append_chatbot_to_body() {
        $options = get_option('mxchat_options');
        if (isset($options['append_to_body']) && $options['append_to_body'] === 'on') {
            echo do_shortcode('[mxchat_chatbot floating="yes"]');
        }
    }



private static function mxchat_extract_main_content($html) {
    if (empty($html)) {
        //error_log('mxchat_extract_main_content: Empty HTML content received');
        return '';
    }

    try {
        $dom = new DOMDocument;
        libxml_use_internal_errors(true); // Suppress HTML parsing errors

        // Simple load of HTML, with @ to suppress warnings
        @$dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

        $xpath = new DOMXPath($dom);

        // Simplified selectors focusing on common content areas
        $selectors = [
            '//article',
            '//*[@id="content"]',
            '//*[@class="entry-content"]',
            '//main'
        ];

        foreach ($selectors as $selector) {
            $nodes = $xpath->query($selector);
            if ($nodes && $nodes->length > 0) {
                $content = '';
                foreach ($nodes as $node) {
                    $content .= $dom->saveHTML($node);
                }
                if (!empty($content)) {
                    return $content;
                }
            }
        }

        // Fallback: Return the entire body content if no specific selector matches
        $body = $dom->getElementsByTagName('body');
        if ($body->length > 0) {
            return $dom->saveHTML($body->item(0));
        }

        // Last resort: return the original HTML
        return $html;

    } catch (Exception $e) {
        //error_log('mxchat_extract_main_content error: ' . $e->getMessage());
        return $html; // Return original HTML if parsing fails
    } finally {
        libxml_clear_errors();
    }
}


private function mxchat_fetch_loops_mailing_lists($api_key) {
    $url = 'https://app.loops.so/api/v1/lists';
    $response = wp_remote_get($url, array(
        'headers' => array(
            'Authorization' => 'Bearer ' . $api_key,
            'Content-Type' => 'application/json'
        )
    ));

    if (is_wp_error($response)) {
        return array();
    }

    $body = wp_remote_retrieve_body($response);
    $lists = json_decode($body, true);

    return isset($lists) && is_array($lists) ? $lists : array();
}





function mxchat_calculate_cosine_similarity($vec1, $vec2) {
    if (empty($vec1) || empty($vec2)) {
        return 0.0;
    }

    $dot_product = 0.0;
    $norm_a = 0.0;
    $norm_b = 0.0;

    for ($i = 0; $i < count($vec1); $i++) {
        $dot_product += $vec1[$i] * $vec2[$i];
        $norm_a += pow($vec1[$i], 2);
        $norm_b += pow($vec2[$i], 2);
    }

    if ($norm_a == 0.0 || $norm_b == 0.0) {
        return 0.0;
    } else {
        return $dot_product / (sqrt($norm_a) * sqrt($norm_b));
    }
}




}
?>