<?php
/**
 * REST API Endpoints for IGNY8
 *
 * Provides endpoints for IGNY8 to query WordPress posts by content_id
 *
 * @package Igny8Bridge
 */

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

/**
 * Igny8RestAPI Class
 */
class Igny8RestAPI {
    
    /**
     * Constructor
     */
    public function __construct() {
        add_action('rest_api_init', array($this, 'register_routes'));
    }
    
    /**
     * Register REST API routes
     */
    public function register_routes() {
        // Get post by IGNY8 content_id
        register_rest_route('igny8/v1', '/post-by-content-id/(?P<content_id>\d+)', array(
            'methods' => 'GET',
            'callback' => array($this, 'get_post_by_content_id'),
            'permission_callback' => array($this, 'check_permission'),
            'args' => array(
                'content_id' => array(
                    'required' => true,
                    'type' => 'integer',
                    'description' => 'IGNY8 content ID'
                )
            )
        ));
        
        // Get post by IGNY8 task_id
        register_rest_route('igny8/v1', '/post-by-task-id/(?P<task_id>\d+)', array(
            'methods' => 'GET',
            'callback' => array($this, 'get_post_by_task_id'),
            'permission_callback' => array($this, 'check_permission'),
            'args' => array(
                'task_id' => array(
                    'required' => true,
                    'type' => 'integer',
                    'description' => 'IGNY8 task ID'
                )
            )
        ));
        
        // Get post status by content_id
        register_rest_route('igny8/v1', '/post-status/(?P<content_id>\d+)', array(
            'methods' => 'GET',
            'callback' => array($this, 'get_post_status_by_content_id'),
            'permission_callback' => array($this, 'check_permission'),
            'args' => array(
                'content_id' => array(
                    'required' => true,
                    'type' => 'integer',
                    'description' => 'IGNY8 content ID'
                )
            )
        ));
    }
    
    /**
     * Check API permission
     *
     * @param WP_REST_Request $request Request object
     * @return bool|WP_Error
     */
    public function check_permission($request) {
        // Check if connection is enabled
        if (!igny8_is_connection_enabled()) {
            return new WP_Error(
                'rest_forbidden',
                __('IGNY8 connection is disabled', 'igny8-bridge'),
                array('status' => 403)
            );
        }
        
        // Check if authenticated with IGNY8
        $api = new Igny8API();
        
        if (!$api->is_authenticated()) {
            return new WP_Error(
                'rest_forbidden',
                __('IGNY8 API not authenticated', 'igny8-bridge'),
                array('status' => 401)
            );
        }
        
        // Verify API token from request header
        $auth_header = $request->get_header('Authorization');
        
        if ($auth_header) {
            $token = get_option('igny8_access_token');
            if ($token && strpos($auth_header, 'Bearer ' . $token) !== false) {
                return true;
            }
        }
        
        // Allow if IGNY8 is connected (for internal use)
        if ($api->is_authenticated()) {
            return true;
        }
        
        return new WP_Error(
            'rest_forbidden',
            __('Invalid authentication', 'igny8-bridge'),
            array('status' => 403)
        );
    }
    
    /**
     * Get post by content_id
     *
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error
     */
    public function get_post_by_content_id($request) {
        // Double-check connection is enabled
        if (!igny8_is_connection_enabled()) {
            return new WP_Error(
                'rest_forbidden',
                __('IGNY8 connection is disabled', 'igny8-bridge'),
                array('status' => 403)
            );
        }
        
        $content_id = intval($request['content_id']);
        
        // Find post by content_id meta
        $posts = get_posts(array(
            'meta_key' => '_igny8_content_id',
            'meta_value' => $content_id,
            'post_type' => 'any',
            'posts_per_page' => 1,
            'post_status' => 'any'
        ));
        
        if (empty($posts)) {
            return new WP_Error(
                'rest_not_found',
                __('Post not found for this content ID', 'igny8-bridge'),
                array('status' => 404)
            );
        }
        
        $post = $posts[0];
        
        return rest_ensure_response(array(
            'success' => true,
            'data' => array(
                'post_id' => $post->ID,
                'title' => $post->post_title,
                'status' => $post->post_status,
                'wordpress_status' => $post->post_status,
                'igny8_status' => igny8_map_wp_status_to_igny8($post->post_status),
                'url' => get_permalink($post->ID),
                'post_type' => $post->post_type,
                'content_id' => $content_id,
                'task_id' => get_post_meta($post->ID, '_igny8_task_id', true),
                'last_synced' => get_post_meta($post->ID, '_igny8_last_synced', true)
            )
        ));
    }
    
    /**
     * Get post by task_id
     *
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error
     */
    public function get_post_by_task_id($request) {
        // Double-check connection is enabled
        if (!igny8_is_connection_enabled()) {
            return new WP_Error(
                'rest_forbidden',
                __('IGNY8 connection is disabled', 'igny8-bridge'),
                array('status' => 403)
            );
        }
        
        $task_id = intval($request['task_id']);
        
        // Find post by task_id meta
        $posts = get_posts(array(
            'meta_key' => '_igny8_task_id',
            'meta_value' => $task_id,
            'post_type' => 'any',
            'posts_per_page' => 1,
            'post_status' => 'any'
        ));
        
        if (empty($posts)) {
            return new WP_Error(
                'rest_not_found',
                __('Post not found for this task ID', 'igny8-bridge'),
                array('status' => 404)
            );
        }
        
        $post = $posts[0];
        
        return rest_ensure_response(array(
            'success' => true,
            'data' => array(
                'post_id' => $post->ID,
                'title' => $post->post_title,
                'status' => $post->post_status,
                'wordpress_status' => $post->post_status,
                'igny8_status' => igny8_map_wp_status_to_igny8($post->post_status),
                'url' => get_permalink($post->ID),
                'post_type' => $post->post_type,
                'task_id' => $task_id,
                'content_id' => get_post_meta($post->ID, '_igny8_content_id', true),
                'last_synced' => get_post_meta($post->ID, '_igny8_last_synced', true)
            )
        ));
    }
    
    /**
     * Get post status by content_id
     *
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error
     */
    public function get_post_status_by_content_id($request) {
        // Double-check connection is enabled
        if (!igny8_is_connection_enabled()) {
            return new WP_Error(
                'rest_forbidden',
                __('IGNY8 connection is disabled', 'igny8-bridge'),
                array('status' => 403)
            );
        }
        
        $content_id = intval($request['content_id']);
        
        // Find post by content_id meta
        $posts = get_posts(array(
            'meta_key' => '_igny8_content_id',
            'meta_value' => $content_id,
            'post_type' => 'any',
            'posts_per_page' => 1,
            'post_status' => 'any',
            'fields' => 'ids' // Only get IDs for performance
        ));
        
        if (empty($posts)) {
            return rest_ensure_response(array(
                'success' => false,
                'message' => 'Post not found',
                'content_id' => $content_id
            ));
        }
        
        $post_id = $posts[0];
        $post = get_post($post_id);
        
        return rest_ensure_response(array(
            'success' => true,
            'data' => array(
                'post_id' => $post_id,
                'wordpress_status' => $post->post_status,
                'igny8_status' => igny8_map_wp_status_to_igny8($post->post_status),
                'status_mapping' => array(
                    'publish' => 'completed',
                    'draft' => 'draft',
                    'pending' => 'pending',
                    'private' => 'completed',
                    'trash' => 'archived',
                    'future' => 'scheduled'
                ),
                'content_id' => $content_id,
                'url' => get_permalink($post_id),
                'last_synced' => get_post_meta($post_id, '_igny8_last_synced', true)
            )
        ));
    }
}

// Initialize REST API
new Igny8RestAPI();