<?php
/**
 * Sitemap XML Module for TigerStyle Heat
 * 
 * Provides comprehensive XML sitemap generation and management with support for
 * posts, pages, categories, tags, and custom post types with intelligent defaults.
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

class TigerStyleSEO_Sitemap_xml {
    
    /**
     * Single instance
     */
    private static $instance = null;
    
    /**
     * Option name for sitemap settings
     */
    private $option_name = 'tigerstyle_heat_sitemap_xml';
    
    /**
     * Default sitemap settings
     */
    private $default_settings = array();
    
    /**
     * Get instance
     */
    public static function instance() {
        if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Constructor
     */
    private function __construct() {
        $this->init_default_settings();
        $this->init_hooks();
    }
    
    /**
     * Initialize WordPress hooks
     */
    private function init_hooks() {
        // Handle sitemap generation
        add_action('init', array($this, 'register_sitemap_endpoints'));
        
        // Handle admin form submissions
        add_action('admin_post_tigerstyle_save_sitemap_xml', array($this, 'save_settings'));
        
        // Add admin scripts
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_scripts'));
        
        // Flush rewrite rules when settings change
        add_action('update_option_' . $this->option_name, array($this, 'flush_rewrite_rules'));
    }
    
    /**
     * Initialize default sitemap settings
     */
    private function init_default_settings() {
        $this->default_settings = array(
            'enabled' => true,
            'include_posts' => true,
            'include_pages' => true,
            'include_categories' => true,
            'include_tags' => true,
            'include_custom_post_types' => array(),
            'exclude_post_ids' => '',
            'max_entries' => 50000,
            'split_by_post_type' => false,
            'include_images' => true,
            'include_lastmod' => true,
            'include_changefreq' => true,
            'include_priority' => true,
            'default_changefreq' => 'monthly',
            'ping_search_engines' => true,
            'cache_duration' => 24, // hours
            'exclude_noindex' => true
        );
    }
    
    /**
     * Register sitemap endpoints
     */
    public function register_sitemap_endpoints() {
        $settings = $this->get_settings();
        
        if (!$settings['enabled']) {
            return;
        }
        
        // Main sitemap index
        add_rewrite_rule('^sitemap\.xml$', 'index.php?tigerstyle_sitemap=index', 'top');
        add_rewrite_rule('^sitemap_index\.xml$', 'index.php?tigerstyle_sitemap=index', 'top');
        
        // Individual sitemaps
        add_rewrite_rule('^sitemap-([^/]+)\.xml$', 'index.php?tigerstyle_sitemap=$matches[1]', 'top');
        
        // Add query vars
        add_filter('query_vars', array($this, 'add_query_vars'));
        
        // Handle template redirects
        add_action('template_redirect', array($this, 'handle_sitemap_request'));
    }
    
    /**
     * Add query vars
     */
    public function add_query_vars($vars) {
        $vars[] = 'tigerstyle_sitemap';
        return $vars;
    }
    
    /**
     * Handle sitemap requests
     */
    public function handle_sitemap_request() {
        $sitemap = get_query_var('tigerstyle_sitemap');
        
        if (empty($sitemap)) {
            return;
        }
        
        // Set XML headers
        header('Content-Type: application/xml; charset=utf-8');
        
        if ($sitemap === 'index') {
            $this->generate_sitemap_index();
        } else {
            $this->generate_sitemap($sitemap);
        }
        
        exit;
    }
    
    /**
     * Generate sitemap index
     */
    private function generate_sitemap_index() {
        $settings = $this->get_settings();
        
        echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
        echo '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
        
        // Posts sitemap
        if ($settings['include_posts']) {
            $this->add_sitemap_to_index('posts');
        }
        
        // Pages sitemap
        if ($settings['include_pages']) {
            $this->add_sitemap_to_index('pages');
        }
        
        // Categories sitemap
        if ($settings['include_categories']) {
            $this->add_sitemap_to_index('categories');
        }
        
        // Tags sitemap
        if ($settings['include_tags']) {
            $this->add_sitemap_to_index('tags');
        }
        
        // Custom post types
        if (!empty($settings['include_custom_post_types'])) {
            foreach ($settings['include_custom_post_types'] as $post_type) {
                $this->add_sitemap_to_index($post_type);
            }
        }
        
        echo '</sitemapindex>' . "\n";
    }
    
    /**
     * Add sitemap to index
     */
    private function add_sitemap_to_index($type) {
        $url = home_url("/sitemap-{$type}.xml");
        $lastmod = date('c');
        
        echo "  <sitemap>\n";
        echo "    <loc>" . esc_xml($url) . "</loc>\n";
        echo "    <lastmod>" . esc_xml($lastmod) . "</lastmod>\n";
        echo "  </sitemap>\n";
    }
    
    /**
     * Generate individual sitemap
     */
    private function generate_sitemap($type) {
        $settings = $this->get_settings();
        
        echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"';
        
        if ($settings['include_images']) {
            echo ' xmlns:image="http://www.google.com/schemas/sitemap-image/1.1"';
        }
        
        echo '>' . "\n";
        
        switch ($type) {
            case 'posts':
                $this->generate_posts_sitemap();
                break;
            case 'pages':
                $this->generate_pages_sitemap();
                break;
            case 'categories':
                $this->generate_categories_sitemap();
                break;
            case 'tags':
                $this->generate_tags_sitemap();
                break;
            default:
                // Handle custom post types
                $this->generate_custom_post_type_sitemap($type);
                break;
        }
        
        echo '</urlset>' . "\n";
    }
    
    /**
     * Generate posts sitemap
     */
    private function generate_posts_sitemap() {
        $settings = $this->get_settings();
        $exclude_ids = array_filter(array_map('trim', explode(',', $settings['exclude_post_ids'])));
        
        $posts = get_posts(array(
            'post_type' => 'post',
            'post_status' => 'publish',
            'numberposts' => $settings['max_entries'],
            'exclude' => $exclude_ids,
            'meta_query' => $settings['exclude_noindex'] ? array(
                array(
                    'key' => '_yoast_wpseo_meta-robots-noindex',
                    'value' => '1',
                    'compare' => '!='
                )
            ) : array()
        ));
        
        foreach ($posts as $post) {
            $this->add_url_to_sitemap($post);
        }
    }
    
    /**
     * Generate pages sitemap
     */
    private function generate_pages_sitemap() {
        $settings = $this->get_settings();
        $exclude_ids = array_filter(array_map('trim', explode(',', $settings['exclude_post_ids'])));
        
        $pages = get_posts(array(
            'post_type' => 'page',
            'post_status' => 'publish',
            'numberposts' => $settings['max_entries'],
            'exclude' => $exclude_ids,
            'meta_query' => $settings['exclude_noindex'] ? array(
                array(
                    'key' => '_yoast_wpseo_meta-robots-noindex',
                    'value' => '1',
                    'compare' => '!='
                )
            ) : array()
        ));
        
        foreach ($pages as $page) {
            $this->add_url_to_sitemap($page);
        }
    }
    
    /**
     * Generate categories sitemap
     */
    private function generate_categories_sitemap() {
        $categories = get_categories(array(
            'hide_empty' => true,
            'number' => $this->get_settings()['max_entries']
        ));
        
        foreach ($categories as $category) {
            $this->add_taxonomy_url_to_sitemap($category);
        }
    }
    
    /**
     * Generate tags sitemap
     */
    private function generate_tags_sitemap() {
        $tags = get_tags(array(
            'hide_empty' => true,
            'number' => $this->get_settings()['max_entries']
        ));
        
        foreach ($tags as $tag) {
            $this->add_taxonomy_url_to_sitemap($tag);
        }
    }
    
    /**
     * Generate custom post type sitemap
     */
    private function generate_custom_post_type_sitemap($post_type) {
        $settings = $this->get_settings();
        
        if (!in_array($post_type, $settings['include_custom_post_types'])) {
            return;
        }
        
        $posts = get_posts(array(
            'post_type' => $post_type,
            'post_status' => 'publish',
            'numberposts' => $settings['max_entries']
        ));
        
        foreach ($posts as $post) {
            $this->add_url_to_sitemap($post);
        }
    }
    
    /**
     * Add URL to sitemap for posts/pages
     */
    private function add_url_to_sitemap($post) {
        $settings = $this->get_settings();
        $url = get_permalink($post);
        
        echo "  <url>\n";
        echo "    <loc>" . esc_xml($url) . "</loc>\n";
        
        if ($settings['include_lastmod']) {
            echo "    <lastmod>" . esc_xml(date('c', strtotime($post->post_modified))) . "</lastmod>\n";
        }
        
        if ($settings['include_changefreq']) {
            echo "    <changefreq>" . esc_xml($settings['default_changefreq']) . "</changefreq>\n";
        }
        
        if ($settings['include_priority']) {
            $priority = ($post->post_type === 'page') ? '0.8' : '0.6';
            echo "    <priority>" . esc_xml($priority) . "</priority>\n";
        }
        
        // Add images if enabled
        if ($settings['include_images']) {
            $this->add_post_images_to_sitemap($post);
        }
        
        echo "  </url>\n";
    }
    
    /**
     * Add URL to sitemap for taxonomy terms
     */
    private function add_taxonomy_url_to_sitemap($term) {
        $settings = $this->get_settings();
        $url = get_term_link($term);
        
        if (is_wp_error($url)) {
            return;
        }
        
        echo "  <url>\n";
        echo "    <loc>" . esc_xml($url) . "</loc>\n";
        
        if ($settings['include_changefreq']) {
            echo "    <changefreq>weekly</changefreq>\n";
        }
        
        if ($settings['include_priority']) {
            echo "    <priority>0.5</priority>\n";
        }
        
        echo "  </url>\n";
    }
    
    /**
     * Add post images to sitemap
     */
    private function add_post_images_to_sitemap($post) {
        // Get featured image
        $featured_image_id = get_post_thumbnail_id($post->ID);
        if ($featured_image_id) {
            $image_url = wp_get_attachment_image_url($featured_image_id, 'full');
            if ($image_url) {
                echo "    <image:image>\n";
                echo "      <image:loc>" . esc_xml($image_url) . "</image:loc>\n";
                echo "    </image:image>\n";
            }
        }
        
        // Get images from content
        preg_match_all('/<img[^>]+src=[\'"]([^\'"]+)[\'"][^>]*>/i', $post->post_content, $matches);
        if (!empty($matches[1])) {
            foreach (array_slice($matches[1], 0, 10) as $image_url) {
                if (filter_var($image_url, FILTER_VALIDATE_URL)) {
                    echo "    <image:image>\n";
                    echo "      <image:loc>" . esc_xml($image_url) . "</image:loc>\n";
                    echo "    </image:image>\n";
                }
            }
        }
    }
    
    /**
     * Get current settings
     */
    private function get_settings() {
        $settings = get_option($this->option_name, array());
        return wp_parse_args($settings, $this->default_settings);
    }
    
    /**
     * Save settings from admin form
     */
    public function save_settings() {
        // Verify nonce
        if (!wp_verify_nonce($_POST['tigerstyle_sitemap_nonce'], 'tigerstyle_sitemap_save')) {
            wp_die('Security check failed');
        }
        
        // Check user permissions
        if (!current_user_can('manage_options')) {
            wp_die('Insufficient permissions');
        }
        
        $settings = array();
        
        // Basic settings
        $settings['enabled'] = isset($_POST['enabled']) ? true : false;
        $settings['include_posts'] = isset($_POST['include_posts']) ? true : false;
        $settings['include_pages'] = isset($_POST['include_pages']) ? true : false;
        $settings['include_categories'] = isset($_POST['include_categories']) ? true : false;
        $settings['include_tags'] = isset($_POST['include_tags']) ? true : false;
        $settings['include_custom_post_types'] = isset($_POST['include_custom_post_types']) ? $_POST['include_custom_post_types'] : array();
        $settings['exclude_post_ids'] = sanitize_text_field($_POST['exclude_post_ids']);
        $settings['max_entries'] = intval($_POST['max_entries']);
        $settings['split_by_post_type'] = isset($_POST['split_by_post_type']) ? true : false;
        $settings['include_images'] = isset($_POST['include_images']) ? true : false;
        $settings['include_lastmod'] = isset($_POST['include_lastmod']) ? true : false;
        $settings['include_changefreq'] = isset($_POST['include_changefreq']) ? true : false;
        $settings['include_priority'] = isset($_POST['include_priority']) ? true : false;
        $settings['default_changefreq'] = sanitize_text_field($_POST['default_changefreq']);
        $settings['ping_search_engines'] = isset($_POST['ping_search_engines']) ? true : false;
        $settings['cache_duration'] = intval($_POST['cache_duration']);
        $settings['exclude_noindex'] = isset($_POST['exclude_noindex']) ? true : false;
        
        // Save settings
        update_option($this->option_name, $settings);
        
        // Flush rewrite rules
        flush_rewrite_rules();
        
        // Redirect back with success message
        wp_redirect(add_query_arg(array(
            'page' => 'tigerstyle-heat',
            'message' => 'sitemap_xml_updated'
        ), admin_url('admin.php')));
        exit;
    }
    
    /**
     * Flush rewrite rules when settings change
     */
    public function flush_rewrite_rules() {
        flush_rewrite_rules();
    }
    
    /**
     * Enqueue admin scripts
     */
    public function enqueue_admin_scripts($hook) {
        if ($hook !== 'toplevel_page_tigerstyle-heat') {
            return;
        }
        
        wp_enqueue_script('tigerstyle-sitemap-admin', TIGERSTYLE_HEAT_PLUGIN_URL . 'admin/js/sitemap-admin.js', array('jquery'), TIGERSTYLE_HEAT_VERSION, true);
    }
    
    /**
     * Render admin page
     */
    public function render_admin_page() {
        $settings = $this->get_settings();
        $sitemap_index_url = home_url('/sitemap.xml');
        $available_post_types = get_post_types(array('public' => true), 'objects');
        unset($available_post_types['attachment']);
        
        ?>
        <div class="tigerstyle-sitemap-container">
            <div class="seo-info-box">
                <h3><?php _e('XML Sitemap Configuration', 'tigerstyle-heat'); ?></h3>
                <p><?php _e('Generate and configure XML sitemaps to help search engines discover and index your content efficiently.', 'tigerstyle-heat'); ?></p>
                
                <div class="sitemap-current-status">
                    <h4><?php _e('Current Sitemap Status', 'tigerstyle-heat'); ?></h4>
                    <p>
                        <strong><?php _e('Sitemap Index URL:', 'tigerstyle-heat'); ?></strong> 
                        <a href="<?php echo esc_url($sitemap_index_url); ?>" target="_blank"><?php echo esc_url($sitemap_index_url); ?></a>
                        <span class="dashicons dashicons-external"></span>
                    </p>
                    <button type="button" id="test-sitemap-btn" class="button"><?php _e('Test Sitemap Access', 'tigerstyle-heat'); ?></button>
                    <button type="button" id="validate-sitemap-btn" class="button"><?php _e('Validate XML Structure', 'tigerstyle-heat'); ?></button>
                    <div id="sitemap-test-result" style="margin-top: 10px;"></div>
                </div>
            </div>
            
            <form method="post" action="<?php echo admin_url('admin-post.php'); ?>">
                <input type="hidden" name="action" value="tigerstyle_save_sitemap_xml">
                <?php wp_nonce_field('tigerstyle_sitemap_save', 'tigerstyle_sitemap_nonce'); ?>
                
                <div class="sitemap-config-grid">
                    <div class="sitemap-config-section">
                        <h4><?php _e('Basic Settings', 'tigerstyle-heat'); ?></h4>
                        <table class="form-table">
                            <tr>
                                <th scope="row"><?php _e('Enable XML Sitemaps', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <label>
                                        <input type="checkbox" name="enabled" value="1" <?php checked($settings['enabled']); ?>>
                                        <?php _e('Generate XML sitemaps for this website', 'tigerstyle-heat'); ?>
                                    </label>
                                </td>
                            </tr>
                            <tr>
                                <th scope="row"><?php _e('Maximum Entries per Sitemap', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <input type="number" name="max_entries" value="<?php echo esc_attr($settings['max_entries']); ?>" min="100" max="50000" step="100" class="regular-text">
                                    <p class="description"><?php _e('Maximum number of URLs in each sitemap file (recommended: 50,000 or less)', 'tigerstyle-heat'); ?></p>
                                </td>
                            </tr>
                        </table>
                    </div>
                    
                    <div class="sitemap-config-section">
                        <h4><?php _e('Content Types', 'tigerstyle-heat'); ?></h4>
                        <table class="form-table">
                            <tr>
                                <th scope="row"><?php _e('Include in Sitemap', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <label><input type="checkbox" name="include_posts" value="1" <?php checked($settings['include_posts']); ?>> <?php _e('Posts', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_pages" value="1" <?php checked($settings['include_pages']); ?>> <?php _e('Pages', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_categories" value="1" <?php checked($settings['include_categories']); ?>> <?php _e('Categories', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_tags" value="1" <?php checked($settings['include_tags']); ?>> <?php _e('Tags', 'tigerstyle-heat'); ?></label><br>
                                </td>
                            </tr>
                            <?php if (!empty($available_post_types)): ?>
                            <tr>
                                <th scope="row"><?php _e('Custom Post Types', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <?php foreach ($available_post_types as $post_type): ?>
                                        <?php if (!in_array($post_type->name, array('post', 'page'))): ?>
                                        <label>
                                            <input type="checkbox" name="include_custom_post_types[]" value="<?php echo esc_attr($post_type->name); ?>" <?php checked(in_array($post_type->name, $settings['include_custom_post_types'])); ?>>
                                            <?php echo esc_html($post_type->label); ?>
                                        </label><br>
                                        <?php endif; ?>
                                    <?php endforeach; ?>
                                </td>
                            </tr>
                            <?php endif; ?>
                        </table>
                    </div>
                </div>
                
                <div class="sitemap-config-grid">
                    <div class="sitemap-config-section">
                        <h4><?php _e('XML Structure Settings', 'tigerstyle-heat'); ?></h4>
                        <table class="form-table">
                            <tr>
                                <th scope="row"><?php _e('Include Additional Data', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <label><input type="checkbox" name="include_lastmod" value="1" <?php checked($settings['include_lastmod']); ?>> <?php _e('Last Modified Date', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_changefreq" value="1" <?php checked($settings['include_changefreq']); ?>> <?php _e('Change Frequency', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_priority" value="1" <?php checked($settings['include_priority']); ?>> <?php _e('Priority Values', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="include_images" value="1" <?php checked($settings['include_images']); ?>> <?php _e('Images (Google Image Sitemap)', 'tigerstyle-heat'); ?></label><br>
                                </td>
                            </tr>
                            <tr>
                                <th scope="row"><?php _e('Default Change Frequency', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <select name="default_changefreq">
                                        <option value="always" <?php selected($settings['default_changefreq'], 'always'); ?>><?php _e('Always', 'tigerstyle-heat'); ?></option>
                                        <option value="hourly" <?php selected($settings['default_changefreq'], 'hourly'); ?>><?php _e('Hourly', 'tigerstyle-heat'); ?></option>
                                        <option value="daily" <?php selected($settings['default_changefreq'], 'daily'); ?>><?php _e('Daily', 'tigerstyle-heat'); ?></option>
                                        <option value="weekly" <?php selected($settings['default_changefreq'], 'weekly'); ?>><?php _e('Weekly', 'tigerstyle-heat'); ?></option>
                                        <option value="monthly" <?php selected($settings['default_changefreq'], 'monthly'); ?>><?php _e('Monthly', 'tigerstyle-heat'); ?></option>
                                        <option value="yearly" <?php selected($settings['default_changefreq'], 'yearly'); ?>><?php _e('Yearly', 'tigerstyle-heat'); ?></option>
                                        <option value="never" <?php selected($settings['default_changefreq'], 'never'); ?>><?php _e('Never', 'tigerstyle-heat'); ?></option>
                                    </select>
                                </td>
                            </tr>
                        </table>
                    </div>
                    
                    <div class="sitemap-config-section">
                        <h4><?php _e('Advanced Options', 'tigerstyle-heat'); ?></h4>
                        <table class="form-table">
                            <tr>
                                <th scope="row"><?php _e('Exclude Posts/Pages', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <input type="text" name="exclude_post_ids" value="<?php echo esc_attr($settings['exclude_post_ids']); ?>" class="regular-text" placeholder="1,2,3">
                                    <p class="description"><?php _e('Comma-separated list of post/page IDs to exclude from sitemap', 'tigerstyle-heat'); ?></p>
                                </td>
                            </tr>
                            <tr>
                                <th scope="row"><?php _e('Additional Settings', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <label><input type="checkbox" name="exclude_noindex" value="1" <?php checked($settings['exclude_noindex']); ?>> <?php _e('Exclude noindex pages', 'tigerstyle-heat'); ?></label><br>
                                    <label><input type="checkbox" name="ping_search_engines" value="1" <?php checked($settings['ping_search_engines']); ?>> <?php _e('Ping search engines when sitemap updates', 'tigerstyle-heat'); ?></label><br>
                                </td>
                            </tr>
                            <tr>
                                <th scope="row"><?php _e('Cache Duration (hours)', 'tigerstyle-heat'); ?></th>
                                <td>
                                    <input type="number" name="cache_duration" value="<?php echo esc_attr($settings['cache_duration']); ?>" min="1" max="168" step="1" class="small-text">
                                    <p class="description"><?php _e('How long to cache sitemap files before regenerating', 'tigerstyle-heat'); ?></p>
                                </td>
                            </tr>
                        </table>
                    </div>
                </div>
                
                <div class="sitemap-preview-section">
                    <h4><?php _e('Sitemap URLs', 'tigerstyle-heat'); ?></h4>
                    <button type="button" id="generate-sitemap-urls-btn" class="button"><?php _e('Generate Sitemap URLs', 'tigerstyle-heat'); ?></button>
                    <div id="sitemap-urls-preview" class="sitemap-preview-content"></div>
                </div>
                
                <?php submit_button(__('Save Sitemap Configuration', 'tigerstyle-heat'), 'primary', 'submit'); ?>
            </form>
        </div>
        
        <style>
        .tigerstyle-sitemap-container { max-width: 1200px; }
        .sitemap-config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 20px 0; }
        .sitemap-config-section { background: #f9f9f9; padding: 15px; border-radius: 5px; }
        .sitemap-current-status { background: #e7f3ff; padding: 15px; border-left: 4px solid #0073aa; margin: 15px 0; }
        .sitemap-preview-content { background: #f1f1f1; padding: 15px; border: 1px solid #ddd; max-height: 300px; overflow-y: auto; }
        .sitemap-preview-section { margin: 20px 0; }
        @media (max-width: 768px) { .sitemap-config-grid { grid-template-columns: 1fr; } }
        </style>
        
        <script>
        jQuery(document).ready(function($) {
            // Test sitemap access
            $('#test-sitemap-btn').click(function() {
                var btn = $(this);
                var result = $('#sitemap-test-result');
                
                btn.prop('disabled', true).text('<?php _e('Testing...', 'tigerstyle-heat'); ?>');
                
                $.get('<?php echo esc_js($sitemap_index_url); ?>')
                    .done(function(data) {
                        result.html('<div class="notice notice-success inline"><p><strong><?php _e('Success!', 'tigerstyle-heat'); ?></strong> <?php _e('Sitemap is accessible and working.', 'tigerstyle-heat'); ?></p></div>');
                    })
                    .fail(function() {
                        result.html('<div class="notice notice-error inline"><p><strong><?php _e('Error!', 'tigerstyle-heat'); ?></strong> <?php _e('Could not access sitemap file.', 'tigerstyle-heat'); ?></p></div>');
                    })
                    .always(function() {
                        btn.prop('disabled', false).text('<?php _e('Test Sitemap Access', 'tigerstyle-heat'); ?>');
                    });
            });
            
            // Validate XML structure
            $('#validate-sitemap-btn').click(function() {
                var btn = $(this);
                var result = $('#sitemap-test-result');
                
                btn.prop('disabled', true).text('<?php _e('Validating...', 'tigerstyle-heat'); ?>');
                
                $.get('<?php echo esc_js($sitemap_index_url); ?>')
                    .done(function(data) {
                        try {
                            var parser = new DOMParser();
                            var xmlDoc = parser.parseFromString(data, "text/xml");
                            var parseError = xmlDoc.getElementsByTagName("parsererror");
                            
                            if (parseError.length > 0) {
                                result.html('<div class="notice notice-error inline"><p><strong><?php _e('Invalid XML!', 'tigerstyle-heat'); ?></strong> <?php _e('The sitemap contains XML syntax errors.', 'tigerstyle-heat'); ?></p></div>');
                            } else {
                                result.html('<div class="notice notice-success inline"><p><strong><?php _e('Valid XML!', 'tigerstyle-heat'); ?></strong> <?php _e('The sitemap XML structure is valid.', 'tigerstyle-heat'); ?></p></div>');
                            }
                        } catch (e) {
                            result.html('<div class="notice notice-error inline"><p><strong><?php _e('Validation Error!', 'tigerstyle-heat'); ?></strong> <?php _e('Could not validate XML structure.', 'tigerstyle-heat'); ?></p></div>');
                        }
                    })
                    .fail(function() {
                        result.html('<div class="notice notice-error inline"><p><strong><?php _e('Error!', 'tigerstyle-heat'); ?></strong> <?php _e('Could not access sitemap for validation.', 'tigerstyle-heat'); ?></p></div>');
                    })
                    .always(function() {
                        btn.prop('disabled', false).text('<?php _e('Validate XML Structure', 'tigerstyle-heat'); ?>');
                    });
            });
            
            // Generate sitemap URLs preview
            $('#generate-sitemap-urls-btn').click(function() {
                var btn = $(this);
                var preview = $('#sitemap-urls-preview');
                var enabled = $('input[name="enabled"]').is(':checked');
                
                btn.prop('disabled', true).text('<?php _e('Generating...', 'tigerstyle-heat'); ?>');
                
                if (!enabled) {
                    preview.html('<p><?php _e('XML Sitemaps are disabled. Enable them to see sitemap URLs.', 'tigerstyle-heat'); ?></p>');
                    btn.prop('disabled', false).text('<?php _e('Generate Sitemap URLs', 'tigerstyle-heat'); ?>');
                    return;
                }
                
                var urls = ['<?php echo esc_js($sitemap_index_url); ?>'];
                
                if ($('input[name="include_posts"]').is(':checked')) {
                    urls.push('<?php echo esc_js(home_url('/sitemap-posts.xml')); ?>');
                }
                if ($('input[name="include_pages"]').is(':checked')) {
                    urls.push('<?php echo esc_js(home_url('/sitemap-pages.xml')); ?>');
                }
                if ($('input[name="include_categories"]').is(':checked')) {
                    urls.push('<?php echo esc_js(home_url('/sitemap-categories.xml')); ?>');
                }
                if ($('input[name="include_tags"]').is(':checked')) {
                    urls.push('<?php echo esc_js(home_url('/sitemap-tags.xml')); ?>');
                }
                
                $('input[name="include_custom_post_types[]"]:checked').each(function() {
                    urls.push('<?php echo esc_js(home_url('/sitemap-')); ?>' + $(this).val() + '.xml');
                });
                
                var html = '<h5><?php _e('Generated Sitemap URLs:', 'tigerstyle-heat'); ?></h5><ul>';
                urls.forEach(function(url) {
                    html += '<li><a href="' + url + '" target="_blank">' + url + '</a></li>';
                });
                html += '</ul>';
                
                preview.html(html);
                btn.prop('disabled', false).text('<?php _e('Generate Sitemap URLs', 'tigerstyle-heat'); ?>');
            });
        });
        </script>
        <?php
    }
}