<?php
/**
 * Analytics API Controller
 *
 * Handles all analytics endpoints for the dashboard
 *
 * @package WooNooW
 * @since 1.0.0
 */

namespace WooNooW\Api;

use WP_REST_Request;
use WP_REST_Response;
use WP_Error;

class AnalyticsController {
	
	/**
	 * Register REST API routes
	 */
	public static function register_routes() {
		// Overview/Dashboard analytics
		register_rest_route('woonoow/v1', '/analytics/overview', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_overview'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);

		// Revenue analytics
		register_rest_route('woonoow/v1', '/analytics/revenue', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_revenue'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
			'args'                => [
				'granularity' => [
					'required'          => false,
					'default'           => 'day',
					'validate_callback' => function($param) {
						return in_array($param, ['day', 'week', 'month']);
					},
				],
			],
		]);

		// Orders analytics
		register_rest_route('woonoow/v1', '/analytics/orders', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_orders'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);

		// Products analytics
		register_rest_route('woonoow/v1', '/analytics/products', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_products'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);

		// Customers analytics
		register_rest_route('woonoow/v1', '/analytics/customers', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_customers'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);

		// Coupons analytics
		register_rest_route('woonoow/v1', '/analytics/coupons', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_coupons'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);

		// Taxes analytics
		register_rest_route('woonoow/v1', '/analytics/taxes', [
			'methods'             => 'GET',
			'callback'            => [__CLASS__, 'get_taxes'],
			'permission_callback' => [Permissions::class, 'check_admin_permission'],
		]);
	}

	/**
	 * Get overview/dashboard analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_overview(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			// For now, return error to use dummy data
			return new WP_Error(
				'not_implemented',
				__('Analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);

			// Future implementation:
			// $data = self::calculate_overview_metrics();
			// return new WP_REST_Response($data, 200);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get revenue analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_revenue(WP_REST_Request $request) {
		try {
			$granularity = $request->get_param('granularity') ?: 'day';

			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Revenue analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);

			// Future implementation:
			// $data = self::calculate_revenue_metrics($granularity);
			// return new WP_REST_Response($data, 200);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get orders analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_orders(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Orders analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get products analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_products(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Products analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get customers analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_customers(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Customers analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get coupons analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_coupons(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Coupons analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	/**
	 * Get taxes analytics
	 *
	 * @param WP_REST_Request $request
	 * @return WP_REST_Response|WP_Error
	 */
	public static function get_taxes(WP_REST_Request $request) {
		try {
			// TODO: Implement real analytics logic
			return new WP_Error(
				'not_implemented',
				__('Taxes analytics API not yet implemented. Using dummy data.', 'woonoow'),
				['status' => 501]
			);
		} catch (\Exception $e) {
			return new WP_Error(
				'analytics_error',
				$e->getMessage(),
				['status' => 500]
			);
		}
	}

	// ========================================
	// PRIVATE HELPER METHODS (Future Implementation)
	// ========================================

	/**
	 * Calculate overview metrics
	 * TODO: Implement this method
	 */
	private static function calculate_overview_metrics() {
		// Will query WooCommerce HPOS tables
		// Return structured data matching frontend expectations
	}

	/**
	 * Calculate revenue metrics
	 * TODO: Implement this method
	 */
	private static function calculate_revenue_metrics($granularity = 'day') {
		// Will query WooCommerce HPOS tables
		// Group by granularity (day/week/month)
		// Return structured data matching frontend expectations
	}

	// Add more helper methods as needed...
}