<?php
/**
 * System / health REST controller.
 *
 * @package ProfitEngine
 */

declare( strict_types=1 );

namespace ProfitEngine\Rest\Controllers;

use ProfitEngine\Rest\AbstractController;
use WP_REST_Response;

defined( 'ABSPATH' ) || exit;

/**
 * Exposes basic plugin/environment metadata.
 *
 * Serves as the app's initial "is everything wired up?" call and confirms the
 * REST namespace, capability check, and nonce flow are all functioning.
 */
class SystemController extends AbstractController {

	/**
	 * {@inheritDoc}
	 */
	public function register_routes(): void {
		register_rest_route(
			$this->namespace,
			'/system',
			array(
				array(
					'methods'             => 'GET',
					'callback'            => array( $this, 'get_system' ),
					'permission_callback' => array( $this, 'check_permission' ),
				),
			)
		);
	}

	/**
	 * Return plugin + environment info.
	 */
	public function get_system(): WP_REST_Response {
		return new WP_REST_Response(
			array(
				'plugin' => array(
					'version'    => PROFIT_ENGINE_VERSION,
					'db_version' => (int) get_option( 'profit_engine_db_version', 0 ),
					'installed'  => get_option( 'profit_engine_installed_at', null ),
				),
				'env'    => array(
					'php'  => PHP_VERSION,
					'wp'   => get_bloginfo( 'version' ),
					'wc'   => defined( 'WC_VERSION' ) ? WC_VERSION : null,
					'hpos' => $this->hpos_enabled(),
				),
				'ready'  => true,
			),
			200
		);
	}

	/**
	 * Whether HPOS (custom order tables) is the active order store.
	 */
	private function hpos_enabled(): bool {
		if ( ! class_exists( \Automattic\WooCommerce\Utilities\OrderUtil::class ) ) {
			return false;
		}

		return \Automattic\WooCommerce\Utilities\OrderUtil::custom_orders_table_usage_is_enabled();
	}
}