<?php

if (!defined('ABSPATH')) {
    exit;
}

if (!defined('AIEO_CHAT_VERSION')) {
    $aieo_chat_ver = (defined('AIEO_VERSION') && '' !== (string) AIEO_VERSION && '0' !== (string) AIEO_VERSION)
        ? (string) AIEO_VERSION
        : '';

    
    
    
    
    
    
    
    
    if ('' === $aieo_chat_ver && defined('AIEO_RUNTIME_VERSION')) {
        $aieo_chat_ver = (string) AIEO_RUNTIME_VERSION;
    }
    if ('' === $aieo_chat_ver && function_exists('get_file_data')) {
        $aieo_chat_main = defined('AIEO_FILE') ? AIEO_FILE : __DIR__ . '/ai-eshop-optimizer.php';
        if (file_exists($aieo_chat_main)) {
            $aieo_chat_hdr = get_file_data($aieo_chat_main, array('Version' => 'Version'));
            $aieo_chat_ver = isset($aieo_chat_hdr['Version']) ? trim((string) $aieo_chat_hdr['Version']) : '';
            unset($aieo_chat_hdr);
        }
        unset($aieo_chat_main);
    }

    define('AIEO_CHAT_VERSION', '' !== $aieo_chat_ver ? $aieo_chat_ver : '0');
    unset($aieo_chat_ver);
}

defined('AIEO_CHAT_FILE') || define('AIEO_CHAT_FILE', __FILE__);
defined('AIEO_CHAT_DIR') || define('AIEO_CHAT_DIR', plugin_dir_path(__FILE__));
defined('AIEO_CHAT_URI') || define('AIEO_CHAT_URI', plugin_dir_url(__FILE__));

class AI_eShop_Chat {

    
    private static $instance = null;

    
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    
    private function __construct() {
        $this->init_hooks();

        
        
        if (get_option('aieo_chat_split_loader', 0)) {
            return;
        }

        
        
        
        
        
        
        
        
        if ($this->context_needs_engine()) {
            $this->load_dependencies();
        } else {
            $this->load_frontend_only();
        }
    }

    
    private function context_needs_engine() {
        if (is_admin()
            || (defined('DOING_CRON') && DOING_CRON)
            || (defined('DOING_AJAX') && DOING_AJAX)
            || (defined('WP_CLI') && WP_CLI)) {
            return true;
        }

        $uri = isset($_SERVER['REQUEST_URI']) ? (string) wp_unslash($_SERVER['REQUEST_URI']) : '';

        
        return ($uri !== '' && strpos($uri, 'aieo-chat/') !== false);
    }

    
    private function load_frontend_only() {
        require_once AIEO_CHAT_DIR . 'includes/chat/class-shortcode-handler.php';
        AI_eShop_Chat_Shortcode::get_instance();
    }

    
    private function init_hooks() {
        
        
        
        
        register_activation_hook(AIEO_CHAT_FILE, array($this, 'activate'));
        register_deactivation_hook(AIEO_CHAT_FILE, array($this, 'deactivate'));

        
        
        
        
        add_action('admin_init', array($this, 'heal_auto_event_scheduling'));

        
        
        
        
        
        
        add_action('admin_enqueue_scripts', array($this, 'disable_emoji_images_on_plugin_pages'), 1);

        if (get_option('aieo_chat_split_loader', 0)) {
            $this->init_hooks_split();
            return;
        }

        
        add_action('init', array($this, 'load_textdomain'), 0);
        add_action('admin_menu', array($this, 'add_admin_menu'), 60);
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_assets'));
        add_action('wp_enqueue_scripts', array($this, 'enqueue_frontend_assets'));
        add_action('wp_footer', array($this, 'render_floating_widget'), 999);
        add_action('wp_enqueue_scripts', array($this, 'enqueue_floating_widget_assets'), 20);
        add_action('wp_ajax_aieo_chat_save_content_selection', array($this, 'ajax_save_content_selection'));
        add_action('wp_ajax_aieo_chat_save_settings', array($this, 'ajax_save_settings'));
        add_action('admin_init', array($this, 'check_tables'));
        add_filter('cron_schedules', array($this, 'add_cron_schedules'));
        add_action('aieo_auto_analytics_event', array($this, 'run_auto_analytics'));
        add_action('aieo_auto_embeddings_event', array($this, 'run_auto_embeddings'));
    }

    
    private function init_hooks_split() {
        $context = class_exists('AIEO_Module_Manifest')
            ? AIEO_Module_Manifest::resolve_context()
            : 'other_frontend';

        $loaders = array();
        switch ($context) {
            case 'admin':
            case 'admin_ajax':
                $loaders[] = 'admin-loader.php';
                break;
            case 'rest_api':
                $loaders[] = 'rest-loader.php';
                break;
            case 'cron':
                $loaders[] = 'cron-loader.php';
                break;
            default:
                
                $loaders[] = 'frontend-loader.php';
                break;
        }

        foreach ($loaders as $loader) {
            $path = AIEO_CHAT_DIR . 'includes/chat/loaders/' . $loader;
            if (!file_exists($path)) { continue; }
            $register = include $path;
            if (is_callable($register)) { $register($this); }
        }
    }

    
    public function load_dependencies_public() {
        $this->load_dependencies();
    }

    
    public function check_tables() {
        global $wpdb;
        $embeddings_table = $wpdb->prefix . 'aieo_chat_embeddings';
        $history_table = $wpdb->prefix . 'aieo_chat_history';
        $business_info_table = $wpdb->prefix . 'aieo_chat_business_info';

        
        
        $embeddings_exists = $wpdb->get_var("SHOW TABLES LIKE '$embeddings_table'") === $embeddings_table;
        
        $history_exists = $wpdb->get_var("SHOW TABLES LIKE '$history_table'") === $history_table;
        
        $business_info_exists = $wpdb->get_var("SHOW TABLES LIKE '$business_info_table'") === $business_info_table;

        if (!$embeddings_exists || !$history_exists) {
            $this->load_dependencies(); 
            AI_eShop_Chat_Database_Manager::get_instance()->create_tables();
        }

        if (!$business_info_exists) {
            $this->load_dependencies(); 
            AI_eShop_Chat_Business_Info_Manager::get_instance()->create_table();
        }
    }

    
    private function load_dependencies() {
        
        require_once AIEO_CHAT_DIR . 'includes/chat/class-anthropic-api.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-openai-api.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-database-manager.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-product-vitals-helper.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-embedding-manager.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-chat-api.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-content-extractor.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-shortcode-handler.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-rest-api.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-model-registry.php';
        require_once AIEO_CHAT_DIR . 'includes/chat/class-business-info-manager.php';

        
        AI_eShop_Chat_Database_Manager::get_instance();
        AI_eShop_Chat_Embedding_Manager::get_instance();
        AI_eShop_Chat_API::get_instance();
        AI_eShop_Chat_Shortcode::get_instance();
        AI_eShop_Chat_REST_API::get_instance();
        AI_eShop_Chat_Model_Registry::get_instance();
        AI_eShop_Chat_Business_Info_Manager::get_instance();
    }

    
    public function load_textdomain() {
        $domain = 'ai-eshop-optimizer';
        $locale = determine_locale();

        
        $mofile = WP_LANG_DIR . '/plugins/' . $domain . '-' . $locale . '.mo';
        if (file_exists($mofile)) {
            load_textdomain($domain, $mofile);
            return;
        }

        
        $plugin_mofile = dirname(__FILE__) . '/languages/' . $domain . '-' . $locale . '.mo';
        if (file_exists($plugin_mofile)) {
            load_textdomain($domain, $plugin_mofile);
            return;
        }

        
        
        load_plugin_textdomain(
            $domain,
            false,
            dirname(plugin_basename(__FILE__)) . '/languages'
        );
    }

    
    public function add_admin_menu() {
        global $menu;

        
        $parent_exists = false;
        if (!empty($menu)) {
            foreach ($menu as $item) {
                if (isset($item[2]) && $item[2] === 'ai-eshop-optimizer') {
                    $parent_exists = true;
                    break;
                }
            }
        }

        if ($parent_exists) {
            
            add_submenu_page(
                'ai-eshop-optimizer',                      
                __('AI Chat', 'ai-eshop-optimizer'),       
                __('AI Chat', 'ai-eshop-optimizer'),       
                'manage_options',                          
                'ai-eshop-chat',                          
                array($this, 'render_admin_page')         
            );
        } else {
            
            add_menu_page(
                __('AI Chat', 'ai-eshop-optimizer'),       
                __('AI Chat', 'ai-eshop-optimizer'),       
                'manage_options',                          
                'ai-eshop-chat',                          
                array($this, 'render_admin_page'),        
                'dashicons-format-chat',                   
                58                                         
            );
        }
    }

    
    public function render_admin_page() {
        
        
        if (class_exists('AIEO_Chrome') && AIEO_Chrome::on() && method_exists('\Rooster\Admin\Board', 'page')) {
            \Rooster\Admin\Board::page(static function () {
                require_once AIEO_CHAT_DIR . 'assets/pages/ai-eshop-chat.php';
            });
            return;
        }
        require_once AIEO_CHAT_DIR . 'assets/pages/ai-eshop-chat.php';
    }

    
    public function enqueue_admin_assets($hook) {
        
        
        if ('ai-eshop-optimizer_page_ai-eshop-chat' !== $hook &&
            (!isset($_GET['page']) || $_GET['page'] !== 'ai-eshop-chat')) {
            return;
        }

        
        
        
        $aieo_panel_css = AIEO_DIR . 'assets/css/aieo-admin-panel.css';
        wp_enqueue_style(
            'aieo-admin-panel',
            AIEO_URI . 'assets/css/aieo-admin-panel.css',
            array(),
            file_exists($aieo_panel_css) ? (string) filemtime($aieo_panel_css) : AIEO_VERSION
        );

        
        wp_enqueue_style(
            'aieo-chat-admin',
            AIEO_CHAT_URI . 'assets/css/chat-admin.css',
            array('aieo-admin-panel'),
            AIEO_CHAT_VERSION
        );

        
        wp_enqueue_style('wp-color-picker');
        wp_enqueue_script('wp-color-picker');

        
        wp_enqueue_media();

        
        
    }

    
    public function enqueue_frontend_assets() {
        
        $floating_enabled = get_option('aieo_chat_floating_enabled', '0') === '1';
        $has_shortcode = $this->page_has_chat_shortcode();

        
        if (!$floating_enabled && !$has_shortcode) {
            return;
        }

        wp_enqueue_style(
            'aieo-chat-frontend',
            AIEO_CHAT_URI . 'assets/css/chat-frontend.css',
            array(),
            AIEO_CHAT_VERSION
        );

        wp_enqueue_script(
            'aieo-chat-frontend',
            AIEO_CHAT_URI . 'assets/js/chat-frontend.js',
            array('jquery'),
            AIEO_CHAT_VERSION,
            array('in_footer' => true, 'strategy' => 'defer')
        );

        
        $current_category = '';
        $current_blog_category = '';
        $current_cpt_category = '';

        
        if (class_exists('WooCommerce')) {
            if (is_product_category()) {
                $term = get_queried_object();
                if ($term && !is_wp_error($term)) {
                    $current_category = $this->get_top_category_for_term($term);
                }
            } elseif (is_product()) {
                global $post;
                if ($post) {
                    $current_category = $this->get_top_category_for_product($post->ID);
                }
            }
        }

        
        if (is_category()) {
            $term = get_queried_object();
            if ($term && !is_wp_error($term)) {
                $current_blog_category = $this->get_top_blog_category_for_term($term);
            }
        } elseif (is_single() && get_post_type() === 'post') {
            global $post;
            if ($post) {
                $current_blog_category = $this->get_top_blog_category_for_post($post->ID);
            }
        }

        
        $cpt_post_type = get_option('aieo_chat_cpt_post_type_slug', '');
        $cpt_taxonomy = get_option('aieo_chat_cpt_taxonomy_slug', '');
        if (!empty($cpt_post_type) && !empty($cpt_taxonomy)) {
            if (is_tax($cpt_taxonomy)) {
                $term = get_queried_object();
                if ($term && !is_wp_error($term)) {
                    $current_cpt_category = $this->get_top_cpt_category_for_term($term, $cpt_taxonomy);
                }
            } elseif (is_single() && get_post_type() === $cpt_post_type) {
                global $post;
                if ($post) {
                    $current_cpt_category = $this->get_top_cpt_category_for_post($post->ID, $cpt_taxonomy);
                }
            }
        }

        wp_localize_script('aieo-chat-frontend', 'aieoChatConfig', array(
            'restUrl' => rest_url('aieo-chat/v1/'),
            'restNonce' => wp_create_nonce('wp_rest'),
            'chatEnabled' => get_option('aieo_chat_enabled', '0'),
            'floatingEnabled' => get_option('aieo_chat_floating_enabled', '0'),
            'floatingPosition' => get_option('aieo_chat_floating_position', 'bottom-right'),
            'botName' => get_option('aieo_chat_bot_name', __('AI Assistant by Oxford Metadata', 'ai-eshop-optimizer')),
            'welcomeMessage' => get_option('aieo_chat_welcome_message', __('Hello! How can I help you find the perfect product today?', 'ai-eshop-optimizer')),
            'inputPlaceholder' => get_option('aieo_chat_input_placeholder', __('Ask about anything...', 'ai-eshop-optimizer')),
            'maxResults' => get_option('aieo_chat_max_results', 10),
            'hideImages' => get_option('aieo_chat_hide_images', '0'),
            'requireLogin' => get_option('aieo_chat_require_login', '0'),
            'showTerms' => get_option('aieo_chat_show_terms', '0'),
            'category_filter_enabled' => get_option('aieo_chat_category_filter_enabled', '0'),
            'blog_category_filter_enabled' => get_option('aieo_chat_blog_category_filter_enabled', '0'),
            'cpt_category_filter_enabled' => get_option('aieo_chat_cpt_category_filter_enabled', '0'),
            'cpt_post_type_slug' => $cpt_post_type,
            'cpt_taxonomy_slug' => $cpt_taxonomy,
            'currentCategory' => $current_category,
            'currentBlogCategory' => $current_blog_category,
            'currentCptCategory' => $current_cpt_category,
            'theme' => get_option('aieo_chat_theme', 'rounded'),
            'i18n' => array(
                'categoryPrompt' => __('Please select a product category to get started:', 'ai-eshop-optimizer'),
                'selectedCategory' => __('Selected category', 'ai-eshop-optimizer'),
                'categoryConfirm' => __('Great! I\'ll help you find products in the {category} category. What are you looking for?', 'ai-eshop-optimizer'),
                'changeCategoryHint' => __('Type "menu" or "μενού" to change category', 'ai-eshop-optimizer'),
                'categoryChangeHint' => __('Click a different category to change, or start chatting about {category} products', 'ai-eshop-optimizer'),
                'categorySwitched' => __('Switched to {category} category. I\'ll help you find products in this category.', 'ai-eshop-optimizer'),
                'allCategoriesSwitched' => __('Now searching across all categories. I\'ll help you find any product from our entire catalog.', 'ai-eshop-optimizer'),
                'helpingWithAllCategories' => __('I\'ll help you find any product from our entire catalog. What are you looking for?', 'ai-eshop-optimizer'),
                'menuReminder' => __('You can change categories anytime using the menu at the top of the chat.', 'ai-eshop-optimizer'),
                'helpingWithCategory' => __('I\'ll help you find products in the {category} category. If you need something else, please select a different category.', 'ai-eshop-optimizer'),
                'blogCategoryPrompt' => __('Please select a blog post category to get started:', 'ai-eshop-optimizer'),
                'blogCategoryConfirm' => __('Great! I\'ll help you find blog posts in the {category} category. What are you looking for?', 'ai-eshop-optimizer'),
                'blogCategorySwitched' => __('Switched to {category} category. I\'ll help you find blog posts in this category.', 'ai-eshop-optimizer'),
                'helpingWithBlogCategory' => __('I\'ll help you find blog posts in the {category} category. If you need something else, please select a different category.', 'ai-eshop-optimizer'),
                'cptCategoryPrompt' => __('Please select a category to get started:', 'ai-eshop-optimizer'),
                'cptCategoryConfirm' => __('Great! I\'ll help you find content in the {category} category. What are you looking for?', 'ai-eshop-optimizer'),
                'cptCategorySwitched' => __('Switched to {category} category. I\'ll help you find content in this category.', 'ai-eshop-optimizer'),
                'helpingWithCptCategory' => __('I\'ll help you find content in the {category} category. If you need something else, please select a different category.', 'ai-eshop-optimizer'),
                'feedbackPrompt' => __('Help me improve! Rate this answer:', 'ai-eshop-optimizer'),
                'feedbackSaved' => __('Thanks for your feedback!', 'ai-eshop-optimizer'),
                'feedbackError' => __('Could not save feedback', 'ai-eshop-optimizer')
            )
        ));
    }

    
    
    public function enqueue_floating_widget_assets() {
        if (is_admin() || get_option('aieo_chat_floating_enabled', '0') !== '1') { return; }
        $dir = plugin_dir_path(__FILE__);
        $url = plugin_dir_url(__FILE__);
        $css = 'assets/css/aieo-chat-widget.css';
        $js  = 'assets/js/aieo-chat-widget.js';
        if (file_exists($dir . $css)) {
            wp_enqueue_style('aieo-chat-widget', $url . $css, array(), (string) filemtime($dir . $css));
        }
        if (file_exists($dir . $js)) {
            $deps = array('jquery');
            if (wp_script_is('aieo-chat-frontend', 'registered') || wp_script_is('aieo-chat-frontend', 'enqueued')) { $deps[] = 'aieo-chat-frontend'; }
            wp_enqueue_script('aieo-chat-widget', $url . $js, $deps, (string) filemtime($dir . $js), array('in_footer' => true, 'strategy' => 'defer'));
        }
    }

    public function render_floating_widget() {
        
        $floating_enabled = get_option('aieo_chat_floating_enabled', '0');
        if ($floating_enabled !== '1') {
            return;
        }

        
        if (is_admin()) {
            return;
        }

        
        $position = get_option('aieo_chat_floating_position', 'bottom-right');
        $mobile_position = get_option('aieo_chat_floating_mobile_position', 'bottom-right');
        $bot_name = get_option('aieo_chat_bot_name', 'AI Assistant by Oxford Metadata');
        $custom_icon_id = intval(get_option('aieo_chat_floating_custom_icon', 0));
        $welcome_bubble = get_option('aieo_chat_floating_welcome_bubble', 'Hi! How can I help you?');
        $popup_width_raw = get_option('aieo_chat_floating_popup_width', '390');
        $popup_height_raw = get_option('aieo_chat_floating_popup_height', '600');
        $button_color = sanitize_hex_color(get_option('aieo_chat_floating_button_color', '#03163C'));
        $primary_color = sanitize_hex_color(get_option('aieo_chat_primary_color', '#47ACFE'));
        
        $aieo_fs = function ($opt, $def) {
            $v = trim((string) get_option($opt, ''));
            if ($v === '') { return $def; }
            return is_numeric($v) ? $v . 'px' : $v;
        };
        $btn_fs_d  = $aieo_fs('aieo_chat_btn_font_size_d', '13px');
        $btn_fs_m  = $aieo_fs('aieo_chat_btn_font_size_m', '12px');
        $text_fs_d = $aieo_fs('aieo_chat_text_font_size_d', '15px');
        $text_fs_m = $aieo_fs('aieo_chat_text_font_size_m', '14px');
        $chat_theme = get_option('aieo_chat_theme', 'rounded');

        
        if (empty($button_color)) {
            $button_color = '#03163C';
        }
        if (empty($primary_color)) {
            $primary_color = '#47ACFE';
        }

        
        $popup_width = $this->sanitize_dimension($popup_width_raw, '390px', 320, 800);
        $popup_height = $this->sanitize_dimension($popup_height_raw, '600px', 400, 900);

        
        $custom_icon_url = $custom_icon_id ? wp_get_attachment_image_url($custom_icon_id, 'thumbnail') : '';
        $use_custom_icon = !empty($custom_icon_url);

        
        $primary_rgb = sscanf($primary_color, "#%02x%02x%02x");
        $primary_color_light = sprintf('rgba(%d, %d, %d, 0.1)', $primary_rgb[0], $primary_rgb[1], $primary_rgb[2]);

        
        $button_rgb = sscanf($button_color, "#%02x%02x%02x");
        
        $button_rgb_dark = array(
            max(0, $button_rgb[0] * 0.85),
            max(0, $button_rgb[1] * 0.85),
            max(0, $button_rgb[2] * 0.85)
        );
        $button_color_dark = sprintf('#%02x%02x%02x', $button_rgb_dark[0], $button_rgb_dark[1], $button_rgb_dark[2]);
        $button_gradient = sprintf('linear-gradient(135deg, %s 0%%, %s 100%%)', $button_color, $button_color_dark);
        $button_shadow = sprintf('rgba(%d, %d, %d, 0.3)', $button_rgb[0], $button_rgb[1], $button_rgb[2]);

        ?>
        <!-- Custom Button and Primary Color Styles (the sheet itself is assets/css/aieo-chat-widget.css) -->
        <style id="aieo-chat-widget-vars">
            :root {
                --aieo-chat-button-color: <?php echo esc_attr($button_color); ?>;
                --aieo-chat-button-gradient: <?php echo esc_attr($button_gradient); ?>;
                --aieo-chat-button-shadow: <?php echo esc_attr($button_shadow); ?>;
                --aieo-chat-primary-color: <?php echo esc_attr($primary_color); ?>;
                --aieo-chat-primary-color-light: <?php echo esc_attr($primary_color_light); ?>;
                --aieo-chat-btn-fs-d: <?php echo esc_attr($btn_fs_d); ?>;
                --aieo-chat-btn-fs-m: <?php echo esc_attr($btn_fs_m); ?>;
                --aieo-chat-text-fs-d: <?php echo esc_attr($text_fs_d); ?>;
                --aieo-chat-text-fs-m: <?php echo esc_attr($text_fs_m); ?>;
                --aieo-chat-btn-fs: var(--aieo-chat-btn-fs-d);
                --aieo-chat-text-fs: var(--aieo-chat-text-fs-d);
            }
            @media (max-width: 720px) {
                :root {
                    --aieo-chat-btn-fs: var(--aieo-chat-btn-fs-m, var(--aieo-chat-btn-fs-d));
                    --aieo-chat-text-fs: var(--aieo-chat-text-fs-m, var(--aieo-chat-text-fs-d));
                }
            }

        </style>

        <!-- AI eShop Chat Floating Widget -->
        <div class="aieo-floating-chat-widget aieo-chat-theme-<?php echo ($chat_theme === 'rounded') ? 'rounded' : 'square'; ?>">
            <!-- Welcome Bubble (shows on first visit only) -->
            <div class="aieo-floating-welcome-bubble hidden <?php echo esc_attr($position); ?> mobile-<?php echo esc_attr($mobile_position); ?>" id="aieo-floating-welcome-bubble">
                <div class="aieo-floating-welcome-bubble-content">
                    <?php echo wp_kses_post($welcome_bubble); ?>
                </div>
                <div class="aieo-floating-welcome-bubble-arrow"></div>
            </div>

            <!-- Floating Button -->
            <?php if (class_exists('AIEO_Theme_Contracts') && AIEO_Theme_Contracts::declares('C11') && ( function_exists( 'rooster_icon' ) || function_exists( 'roosterx_icon' ) )) : ?>
            <?php 
                  
                  ?>
            <button type="button" id="aieo-floating-chat-trigger" class="rooster-fab rooster-fab--chat rooster-fab--primary<?php echo has_filter('pre_option_aieo_chat_floating_enabled') ? ' aieo-fab--hidden' : ''; ?>" style="display: none;" aria-label="<?php esc_attr_e('Chat', 'ai-eshop-optimizer'); ?>"><?php echo ( function_exists( 'rooster_icon' ) ? 'rooster_icon' : 'roosterx_icon' )('chat'); ?></button>
            <?php else : ?>
            <div id="aieo-floating-chat-trigger" class="aieo-floating-trigger <?php echo esc_attr($position); ?> mobile-<?php echo esc_attr($mobile_position); ?>" style="display: none;">
                <?php if ($use_custom_icon) : ?>
                    <img src="<?php echo esc_url($custom_icon_url); ?>" alt="Chat" class="aieo-floating-custom-icon" style="width: 28px; height: 28px;" />
                <?php else : ?>
                    <svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                        <path d="M20 2H4C2.9 2 2 2.9 2 4V22L6 18H20C21.1 18 22 17.1 22 16V4C22 2.9 21.1 2 20 2ZM20 16H6L4 18V4H20V16Z" fill="white"/>
                        <path d="M7 9H17V11H7V9ZM7 12H14V14H7V12Z" fill="white"/>
                    </svg>
                <?php endif; ?>
            </div>
            <?php endif; ?>

            <?php ?>
            <template id="aieo-chat-window-template">
            <!-- Chat Popup -->
            <!--
                The saved popup_width / popup_height options describe the
                MOBILE size — desktop should use the CSS default (520×720,
                resizable) from chat-frontend.css. We therefore emit the
                saved dimensions inside a mobile-scoped @media rule rather
                than as an unconditional inline `style` attribute, otherwise
                desktop also gets the (smaller) mobile size and the `resize`
                handle has no headroom.
            -->
            <style>
                @media (max-width: 768px) {
                    #aieo-floating-chat-window {
                        width: <?php echo esc_attr($popup_width); ?>;
                        height: <?php echo esc_attr($popup_height); ?>;
                    }
                }
            </style>
            <div id="aieo-floating-chat-window" class="aieo-floating-chat-window <?php echo esc_attr($position); ?> mobile-<?php echo esc_attr($mobile_position); ?>" style="display: none;">
                <!-- Custom resize handles. CSS `resize: both` only emits one
                     handle at the bottom-right corner; these add the other
                     three corners + four edges. The JS resizer initialises
                     them on first chat open and is anchor-aware (knows
                     whether the popup is bottom-right / bottom-left / top-
                     right / top-left and grows the size by extending the
                     unanchored side). Hidden on mobile via the @media
                     block in chat-frontend.css. -->
                <div class="aieo-resize-handle aieo-resize-n"  data-aieo-resize="n"></div>
                <div class="aieo-resize-handle aieo-resize-s"  data-aieo-resize="s"></div>
                <div class="aieo-resize-handle aieo-resize-w"  data-aieo-resize="w"></div>
                <div class="aieo-resize-handle aieo-resize-e"  data-aieo-resize="e"></div>
                <div class="aieo-resize-handle aieo-resize-nw" data-aieo-resize="nw"></div>
                <div class="aieo-resize-handle aieo-resize-ne" data-aieo-resize="ne"></div>
                <div class="aieo-resize-handle aieo-resize-sw" data-aieo-resize="sw"></div>
                <div class="aieo-resize-handle aieo-resize-se" data-aieo-resize="se"></div>
                <div class="aieo-chat-wrapper aieo-floating-chat-wrapper">
                    <div class="aieo-chat-container">
                        <div class="aieo-chat-header">
                            <div class="aieo-chat-avatar">🤖</div>
                            <div class="aieo-chat-title">
                                <strong><?php echo esc_html($bot_name); ?></strong>
                                <span class="aieo-chat-status"><?php esc_html_e('● Online', 'ai-eshop-optimizer'); ?></span>
                            </div>
                            <button id="aieo-chat-close" class="aieo-chat-close" title="<?php esc_attr_e('Close chat', 'ai-eshop-optimizer'); ?>">&times;</button>
                        </div>
                        <div class="aieo-chat-messages" id="aieo-floating-chat-messages">
                            <!-- Welcome message will be added by JavaScript -->
                        </div>
                        <div class="aieo-chat-input-area">
                            <?php if (get_option('aieo_chat_show_terms', '0') === '1') : ?>
                                <div class="aieo-chat-terms">
                                    <?php esc_html_e('By using this chat, you agree to our terms of service.', 'ai-eshop-optimizer'); ?>
                                </div>
                            <?php endif; ?>
                            <div class="aieo-chat-input-wrapper">
                                <input type="text" id="aieo-floating-chat-input" class="aieo-chat-input" placeholder="<?php echo esc_attr(get_option('aieo_chat_input_placeholder', __('Ask about anything...', 'ai-eshop-optimizer'))); ?>" />
                                <button id="aieo-floating-chat-send" class="aieo-chat-send-btn wp-element-button">
                                    <svg width="20" height="20" viewBox="0 0 20 20" fill="currentColor" transform="scale(-1, 1)">
                                        <path d="M2.553 9.106a1 1 0 000 1.788l14 7a1 1 0 001.409-1.169l-1.429-5A1 1 0 0115.571 11H11a1 1 0 110-2h4.571a1 1 0 00.962-.725l1.428-5a1 1 0 00-1.408-1.17l-14 7z"/>
                                    </svg>
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            </template>
        </div>
        <?php
    }

    
    private function sanitize_dimension($value, $default, $min_px, $max_px) {
        if (empty($value)) {
            return $default;
        }

        
        if (is_string($value) && preg_match('/^(\d+(?:\.\d+)?)(px|vh|%|vw)$/i', $value, $matches)) {
            $number = floatval($matches[1]);
            $unit = strtolower($matches[2]);

            
            if ($unit === 'px') {
                $number = max($min_px, min($max_px, $number));
            }

            return $number . $unit;
        }

        
        $number = intval($value);
        if ($number > 0) {
            $number = max($min_px, min($max_px, $number));
            return $number . 'px';
        }

        return $default;
    }

    
    private function page_has_chat_shortcode() {
        global $post;

        
        if (!is_singular() || !$post) {
            return false;
        }

        
        if (has_shortcode($post->post_content, 'aieo_chat')) {
            return true;
        }

        
        if (has_block('core/shortcode', $post->post_content)) {
            
            if (strpos($post->post_content, '[aieo_chat') !== false) {
                return true;
            }
        }

        return false;
    }

    
    public function activate() {
        
        AI_eShop_Chat_Database_Manager::get_instance()->create_tables();
        AI_eShop_Chat_Business_Info_Manager::get_instance()->create_table();

        
        $this->set_default_options();

        
        flush_rewrite_rules();
    }

    
    public function deactivate() {
        
        flush_rewrite_rules();
    }

    
    public function disable_emoji_images_on_plugin_pages() {
        
        
        
        
        
        
        
        
        
        remove_action('admin_print_scripts', 'print_emoji_detection_script');
        remove_action('admin_print_styles', 'print_emoji_styles');
    }

    
    private function set_default_options() {
        $defaults = array(
            'aieo_chat_enabled' => '0',
            'aieo_chat_bot_name' => 'AI Assistant by Oxford Metadata',
            'aieo_chat_welcome_message' => 'Hello! How can I help you find the perfect product today?',
            'aieo_chat_input_placeholder' => 'Ask about anything...',
            'aieo_chat_model' => 'claude-sonnet-4-5',
            'aieo_chat_max_tokens' => '2000',
            'aieo_chat_temperature' => '0.5',
            'aieo_chat_max_results' => '10',
            'aieo_chat_rate_limit' => '1000',
            
            
            
            
            'aieo_chat_product_threshold' => '50',
            'aieo_chat_post_threshold' => '50',
            
            
            
            'aieo_chat_card_min_score' => '55',
            'aieo_chat_min_products' => '3',
            'aieo_chat_max_products' => '10',
            'aieo_chat_min_posts' => '2',
            'aieo_chat_max_posts' => '5',
            'aieo_chat_hide_images' => '0',
            'aieo_chat_require_login' => '0',
            'aieo_chat_history_enabled' => '1',
            'aieo_chat_show_terms' => '0',
            'aieo_chat_floating_enabled' => '0',
            'aieo_chat_floating_position' => 'bottom-right',
            'aieo_chat_floating_mobile_position' => 'bottom-right',
            'aieo_chat_floating_popup_width' => '390px',
            'aieo_chat_floating_popup_height' => '600px',
            'aieo_chat_enabled_post_types' => array('product')
        );

        foreach ($defaults as $key => $value) {
            if (get_option($key) === false) {
                add_option($key, $value, '', 'no');
            }
        }
    }

    
    public function ajax_save_content_selection() {
        check_ajax_referer('aieo_chat_admin', 'nonce');

        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => __('Insufficient permissions', 'ai-eshop-optimizer')), 403);
        }

        
        
        
        $post_types = isset($_POST['post_types']) ? array_map('sanitize_text_field', (array) wp_unslash($_POST['post_types'])) : array();
        $post_types = array_values(array_filter($post_types, 'strlen'));
        update_option('aieo_chat_enabled_post_types', $post_types);

        $taxonomies = isset($_POST['taxonomies']) ? array_map('sanitize_text_field', (array) wp_unslash($_POST['taxonomies'])) : array();
        $taxonomies = array_values(array_filter($taxonomies, 'strlen'));
        update_option('aieo_chat_enabled_taxonomies', $taxonomies);

        wp_send_json_success(array(
            'post_types_saved' => $post_types,
            'taxonomies_saved' => $taxonomies
        ));
    }

    
    public function ajax_save_settings() {
        check_ajax_referer('aieo_chat_admin', 'nonce');

        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => __('Insufficient permissions', 'ai-eshop-optimizer')), 403);
        }

        $saved_settings = array();

        
        if (isset($_POST['aieo_chat_deduplication_mode'])) {
            $dedup_mode = intval($_POST['aieo_chat_deduplication_mode']);
            update_option('aieo_chat_deduplication_mode', $dedup_mode);
            $saved_settings['deduplication_mode'] = $dedup_mode;
        }

        wp_send_json_success(array(
            'message' => __('Settings saved successfully', 'ai-eshop-optimizer'),
            'saved' => $saved_settings
        ));
    }

    
    public function add_cron_schedules($schedules) {
        if (!isset($schedules['weekly'])) {
            $schedules['weekly'] = array(
                'interval' => 7 * DAY_IN_SECONDS,
                'display'  => __('Once Weekly', 'ai-eshop-optimizer')
            );
        }
        if (!isset($schedules['monthly'])) {
            $schedules['monthly'] = array(
                'interval' => 30 * DAY_IN_SECONDS,
                'display'  => __('Once Monthly', 'ai-eshop-optimizer')
            );
        }
        return $schedules;
    }

    
    private function has_valid_pro_subscription() {
        
        if (get_option('aieo_user_membership') !== 'Pro') {
            return false;
        }

        
        $expiration_date = get_option('aieo_subscription_expiration', '');
        if (!empty($expiration_date)) {
            
            $expiration_timestamp = strtotime($expiration_date);
            $current_timestamp = current_time('timestamp', true);

            
            if ($expiration_timestamp < $current_timestamp) {
                if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Pro subscription expired on ' . $expiration_date . ' - disabling automation'); }

                
                update_option('aieo_auto_analytics_enabled', '0');
                update_option('aieo_auto_embeddings_enabled', '0');

                
                wp_clear_scheduled_hook('aieo_auto_analytics_event');
                wp_clear_scheduled_hook('aieo_auto_embeddings_event');

                return false;
            }
        }

        return true;
    }

    
    public function heal_auto_event_scheduling() {
        $this->maybe_rearm_auto_event(
            'aieo_auto_analytics_enabled',
            'aieo_auto_analytics_frequency',
            'aieo_auto_analytics_time',
            'aieo_auto_analytics_event'
        );
        
        
        if (class_exists('AIEO_Chat_Indexing') && AIEO_Chat_Indexing::enabled()) {
            $this->maybe_rearm_auto_event(
                'aieo_auto_embeddings_enabled',
                'aieo_auto_embeddings_frequency',
                'aieo_auto_embeddings_time',
                'aieo_auto_embeddings_event'
            );
        }
    }

    
    private function maybe_rearm_auto_event($enabled_opt, $freq_opt, $time_opt, $hook) {
        if ('1' !== (string) get_option($enabled_opt, '0')) {
            return; 
        }
        if (wp_next_scheduled($hook)) {
            return; 
        }
        $frequency  = (string) get_option($freq_opt, 'weekly');
        $recurrence = in_array($frequency, array('daily', 'weekly', 'monthly'), true) ? $frequency : 'weekly';
        $time       = (string) get_option($time_opt, '03:00');
        $next_run   = $this->calc_next_run_time($recurrence, $time);
        if ($next_run) {
            wp_schedule_event($next_run, $recurrence, $hook);
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: self-healed missing cron ' . $hook . ' for ' . gmdate('Y-m-d H:i:s', $next_run)); }
        }
    }

    
    private function calc_next_run_time($frequency, $time) {
        if (empty($time) || strpos($time, ':') === false) {
            return false;
        }
        list($hour, $minute) = array_pad(explode(':', $time), 2, '0');
        $hour   = (int) $hour;
        $minute = (int) $minute;
        $now    = current_time('timestamp', true);
        $today  = strtotime(gmdate('Y-m-d', $now) . ' ' . sprintf('%02d:%02d:00', $hour, $minute));
        if ($today <= $now) {
            if ('daily' === $frequency)  { return $today + DAY_IN_SECONDS; }
            if ('weekly' === $frequency) { return $today + (7 * DAY_IN_SECONDS); }
            return $today + (30 * DAY_IN_SECONDS);
        }
        return $today;
    }

    
    public function run_auto_analytics() {
        if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Running automated analytics update'); }

        
        if (!$this->has_valid_pro_subscription()) {
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Skipping analytics automation - Valid Pro subscription required'); }
            return;
        }

        
        
        do_action('aieo_run_export_and_analysis');

        if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Completed automated analytics update'); }
    }

    
    public function run_auto_embeddings() {
        
        if (!class_exists('AIEO_Chat_Indexing') && file_exists(AIEO_CHAT_DIR . 'includes/chat/class-aieo-chat-indexing.php')) {
            require_once AIEO_CHAT_DIR . 'includes/chat/class-aieo-chat-indexing.php';
        }
        if (class_exists('AIEO_Chat_Indexing') && !AIEO_Chat_Indexing::enabled()) {
            return;
        }
        if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Running automated embeddings generation'); }

        
        if (!$this->has_valid_pro_subscription()) {
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Skipping embeddings automation - Valid Pro subscription required'); }
            return;
        }

        
        $embedding_provider = get_option('aieo_embedding_provider', 'voyage');
        $dedup_mode = get_option('aieo_chat_deduplication_mode', 1);
        $enabled_post_types = class_exists('AIEO_Content_Types') ? AIEO_Content_Types::chat_post_types() : get_option('aieo_chat_enabled_post_types', array('product'));

        if (empty($enabled_post_types)) {
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: No post types selected for embedding generation'); }
            return;
        }

        
        if ($embedding_provider === 'voyage') {
            $embedding_engine = get_option('aieo_chat_embedding_model', 'voyage-3');
        } else {
            $embedding_engine = get_option('aieo_chat_openai_embedding_model', 'text-embedding-3-large');
        }

        if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Generating embeddings with engine: ' . $embedding_engine . ', dedup: ' . $dedup_mode); }

        
        
        
        
        
        
        
        
        
        
        
        if (!class_exists('AI_eShop_Chat_Embedding_Manager')) {
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Embedding manager unavailable — auto-embeddings skipped'); }
            return;
        }

        $manager      = AI_eShop_Chat_Embedding_Manager::get_instance();
        $deduplicated = (int) $dedup_mode;
        $batch_size   = 50;
        $time_budget  = 120; 
        $max_batches  = 200; 
        $start        = time();
        $processed    = 0;

        foreach ($enabled_post_types as $post_type) {
            $batches_done = 0;
            do {
                $result    = $manager->generate_all_embeddings($post_type, $batch_size, 0, $deduplicated, $embedding_engine);
                $did       = isset($result['processed']) ? (int) $result['processed'] : 0;
                $remaining = isset($result['remaining']) ? (int) $result['remaining'] : 0;
                $processed += $did;
                $batches_done++;

                
                
                if ($did === 0) {
                    break;
                }
            } while ($remaining > 0 && (time() - $start) < $time_budget && $batches_done < $max_batches);

            
            if ((time() - $start) >= $time_budget) {
                break;
            }
        }

        if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { error_log('AIEO: Completed automated embeddings generation - processed ' . $processed . ' new items'); }
    }

    
    private function get_top_category_for_term($term) {
        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, 'product_cat');
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, 'product_cat');

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

    
    
    private function canonical_term($object_type, $object_id, $taxonomy) {
        if (!class_exists('AIEO_SEO_Store')) {
            return null;
        }
        $tid = (int) AIEO_SEO_Store::get_primary_term($object_type, (int) $object_id, $taxonomy);
        if ($tid <= 0) {
            return null;
        }
        $term = get_term($tid, $taxonomy);
        return ($term && !is_wp_error($term)) ? $term : null;
    }

    private function get_top_category_for_product($product_id) {
        
        $terms = wp_get_post_terms($product_id, 'product_cat', array('fields' => 'all'));

        if (empty($terms) || is_wp_error($terms)) {
            return '';
        }

        
        
        $term = $this->canonical_term('product', $product_id, 'product_cat') ?: $terms[0];

        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, 'product_cat');
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, 'product_cat');

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

    
    private function get_top_blog_category_for_term($term) {
        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, 'category');
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, 'category');

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

    
    private function get_top_blog_category_for_post($post_id) {
        
        $terms = wp_get_post_terms($post_id, 'category', array('fields' => 'all'));

        if (empty($terms) || is_wp_error($terms)) {
            return '';
        }

        
        $term = $this->canonical_term('post', $post_id, 'category') ?: $terms[0];

        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, 'category');
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, 'category');

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

    
    private function get_top_cpt_category_for_term($term, $taxonomy) {
        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, $taxonomy);
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, $taxonomy);

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

    
    private function get_top_cpt_category_for_post($post_id, $taxonomy) {
        
        $terms = wp_get_post_terms($post_id, $taxonomy, array('fields' => 'all'));

        if (empty($terms) || is_wp_error($terms)) {
            return '';
        }

        
        $term = $this->canonical_term(get_post_type($post_id), $post_id, $taxonomy) ?: $terms[0];

        
        if ($term->parent == 0) {
            return $term->name;
        }

        
        $ancestors = get_ancestors($term->term_id, $taxonomy);
        if (empty($ancestors)) {
            return $term->name;
        }

        
        $top_term_id = end($ancestors);
        $top_term = get_term($top_term_id, $taxonomy);

        return (!is_wp_error($top_term) && $top_term) ? $top_term->name : $term->name;
    }

}

function aieo_chat_init() {
    AI_eShop_Chat::get_instance();
}
add_action('plugins_loaded', 'aieo_chat_init', 20);