<?php
/**
 * IGNY8 Template Loader
 *
 * Loads custom template for IGNY8-generated content
 * Only applies to posts with _igny8_content_id meta field
 *
 * @package Igny8Bridge
 */

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

class Igny8_Template_Loader {
    
    /**
     * Constructor
     */
    public function __construct() {
        // Hook into template loading with high priority
        add_filter('single_template', [$this, 'load_igny8_template'], 99);
        
        // Enqueue styles and scripts for IGNY8 template
        add_action('wp_enqueue_scripts', [$this, 'enqueue_template_assets']);
        
        // Add body class for IGNY8 content
        add_filter('body_class', [$this, 'add_body_class']);
    }
    
    /**
     * Check if current post is IGNY8-generated content
     *
     * @param int|null $post_id Post ID (optional, defaults to current post)
     * @return bool
     */
    public function is_igny8_content($post_id = null) {
        if (!$post_id) {
            $post_id = get_the_ID();
        }
        
        if (!$post_id) {
            return false;
        }
        
        // Check if post has IGNY8 content ID meta
        $content_id = get_post_meta($post_id, '_igny8_content_id', true);
        
        return !empty($content_id);
    }
    
    /**
     * Load IGNY8 custom template for IGNY8-generated posts
     *
     * @param string $template Default template path
     * @return string Template path
     */
    public function load_igny8_template($template) {
        global $post;
        
        // Only apply to single post views
        if (!is_singular('post')) {
            return $template;
        }
        
        // Only apply to IGNY8-generated content
        if (!$this->is_igny8_content($post->ID)) {
            return $template;
        }
        
        // Path to our custom template
        $custom_template = plugin_dir_path(dirname(__FILE__)) . 'templates/single-igny8-content.php';
        
        // Use custom template if it exists
        if (file_exists($custom_template)) {
            return $custom_template;
        }
        
        // Fallback to default template
        return $template;
    }
    
    /**
     * Enqueue styles and scripts for IGNY8 template
     */
    public function enqueue_template_assets() {
        global $post;
        
        // Only enqueue on single post pages
        if (!is_singular('post')) {
            return;
        }
        
        // Only enqueue for IGNY8 content
        if (!$this->is_igny8_content($post->ID)) {
            return;
        }
        
        // Enqueue custom styles
        wp_enqueue_style(
            'igny8-content-template',
            plugin_dir_url(dirname(__FILE__)) . 'templates/assets/css/igny8-content-template.css',
            array(),
            '1.0.0'
        );
        
        // Enqueue custom JavaScript (if needed in future)
        wp_enqueue_script(
            'igny8-content-template',
            plugin_dir_url(dirname(__FILE__)) . 'templates/assets/js/igny8-content-template.js',
            array('jquery'),
            '1.0.0',
            true
        );
    }
    
    /**
     * Add body class for IGNY8 content
     *
     * @param array $classes Current body classes
     * @return array Modified body classes
     */
    public function add_body_class($classes) {
        global $post;
        
        if (is_singular('post') && $this->is_igny8_content($post->ID)) {
            $classes[] = 'igny8-content';
            $classes[] = 'igny8-template-active';
        }
        
        return $classes;
    }
}

// Initialize template loader
new Igny8_Template_Loader();