<?php
/**
 * Notifications REST API Controller
 * 
 * Handles notification settings API endpoints.
 * 
 * @package WooNooW\Api
 */

namespace WooNooW\Api;

use WP_REST_Request;
use WP_REST_Response;
use WP_Error;
use WooNooW\Core\Notifications\NotificationManager;
use WooNooW\Core\Notifications\NotificationSettingsProvider;

class NotificationsController {
	
	/**
	 * REST API namespace
	 */
	private $namespace = 'woonoow/v1';
	
	/**
	 * REST API base
	 */
	private $rest_base = 'notifications';
	
	/**
	 * Register routes
	 */
	public function register_routes() {
		// GET /woonoow/v1/notifications/channels
		register_rest_route($this->namespace, '/' . $this->rest_base . '/channels', [
			[
				'methods' => 'GET',
				'callback' => [$this, 'get_channels'],
				'permission_callback' => [$this, 'check_permission'],
			],
		]);
		
		// GET /woonoow/v1/notifications/events
		register_rest_route($this->namespace, '/' . $this->rest_base . '/events', [
			[
				'methods' => 'GET',
				'callback' => [$this, 'get_events'],
				'permission_callback' => [$this, 'check_permission'],
			],
		]);
		
		// GET /woonoow/v1/notifications/settings
		register_rest_route($this->namespace, '/' . $this->rest_base . '/settings', [
			[
				'methods' => 'GET',
				'callback' => [$this, 'get_settings'],
				'permission_callback' => [$this, 'check_permission'],
			],
		]);
		
		// POST /woonoow/v1/notifications/settings
		register_rest_route($this->namespace, '/' . $this->rest_base . '/settings', [
			[
				'methods' => 'POST',
				'callback' => [$this, 'update_settings'],
				'permission_callback' => [$this, 'check_permission'],
			],
		]);
	}
	
	/**
	 * Get available notification channels
	 * 
	 * @param WP_REST_Request $request Request object
	 * @return WP_REST_Response
	 */
	public function get_channels(WP_REST_Request $request) {
		$channels = NotificationManager::get_channels();
		
		// Add enabled status from settings
		$settings = NotificationSettingsProvider::get_settings();
		$channel_settings = $settings['channels'] ?? [];
		
		foreach ($channels as $id => &$channel) {
			$channel['enabled'] = $channel_settings[$id]['enabled'] ?? $channel['builtin'];
		}
		
		return new WP_REST_Response(array_values($channels), 200);
	}
	
	/**
	 * Get notification events
	 * 
	 * @param WP_REST_Request $request Request object
	 * @return WP_REST_Response
	 */
	public function get_events(WP_REST_Request $request) {
		$events = NotificationManager::get_events();
		$settings = NotificationSettingsProvider::get_settings();
		$event_settings = $settings['events'] ?? [];
		
		// Merge event data with settings
		foreach ($events as $id => &$event) {
			$event_config = $event_settings[$id] ?? [];
			$event['enabled'] = $event_config['enabled'] ?? true;
			$event['channels'] = $event_config['channels'] ?? ['email'];
			$event['recipients'] = $event_config['recipients'] ?? ['email' => 'admin'];
		}
		
		// Group by category
		$grouped = [
			'orders' => [],
			'products' => [],
			'customers' => [],
		];
		
		foreach ($events as $event) {
			$category = $event['category'] ?? 'general';
			if (!isset($grouped[$category])) {
				$grouped[$category] = [];
			}
			$grouped[$category][] = $event;
		}
		
		return new WP_REST_Response($grouped, 200);
	}
	
	/**
	 * Get notification settings
	 * 
	 * @param WP_REST_Request $request Request object
	 * @return WP_REST_Response
	 */
	public function get_settings(WP_REST_Request $request) {
		$settings = NotificationSettingsProvider::get_settings();
		return new WP_REST_Response($settings, 200);
	}
	
	/**
	 * Update notification settings
	 * 
	 * @param WP_REST_Request $request Request object
	 * @return WP_REST_Response|WP_Error
	 */
	public function update_settings(WP_REST_Request $request) {
		$new_settings = $request->get_json_params();
		
		if (empty($new_settings)) {
			return new WP_Error(
				'invalid_settings',
				__('Invalid settings data', 'woonoow'),
				['status' => 400]
			);
		}
		
		$updated = NotificationSettingsProvider::update_settings($new_settings);
		
		if (!$updated) {
			return new WP_Error(
				'update_failed',
				__('Failed to update notification settings', 'woonoow'),
				['status' => 500]
			);
		}
		
		return new WP_REST_Response([
			'success' => true,
			'message' => __('Notification settings updated successfully', 'woonoow'),
			'settings' => NotificationSettingsProvider::get_settings(),
		], 200);
	}
	
	/**
	 * Check if user has permission
	 * 
	 * @return bool
	 */
	public function check_permission() {
		return current_user_can('manage_woocommerce') || current_user_can('manage_options');
	}
}