<?php
/**
 * Sets up the Purchases REST API endpoints.
 *
 * @package automattic/my-jetpack
 */

namespace Automattic\Jetpack\My_Jetpack;

use Automattic\Jetpack\Connection\Client;
use Automattic\Jetpack\Connection\Manager as Connection_Manager;
use WP_Error;

/**
 * Registers the REST routes for Purchases.
 *
 * @phan-constructor-used-for-side-effects
 */
class REST_Purchases {
	/**
	 * Constructor.
	 */
	public function __construct() {
		register_rest_route(
			'my-jetpack/v1',
			'/site/purchases',
			array(
				'methods'             => \WP_REST_Server::READABLE,
				'callback'            => __CLASS__ . '::get_site_current_purchases',
				'permission_callback' => __CLASS__ . '::permissions_callback',
			)
		);
	}

	/**
	 * Check user capability to access the endpoint.
	 *
	 * @access public
	 * @static
	 *
	 * @return true|WP_Error
	 */
	public static function permissions_callback() {
		$connection        = new Connection_Manager();
		$is_site_connected = $connection->is_connected();

		if ( ! $is_site_connected ) {
			return new WP_Error(
				'not_connected',
				__( 'Your site is not connected to Jetpack.', 'jetpack-my-jetpack' ),
				array(
					'status' => 400,
				)
			);
		}

		return current_user_can( 'edit_posts' );
	}

	/**
	 * Site purchases endpoint.
	 *
	 * @return array|WP_Error of site purchases.
	 */
	public static function get_site_current_purchases() {
		$site_id           = \Jetpack_Options::get_option( 'id' );
		$wpcom_endpoint    = sprintf( '/upgrades?site=%1$d&locale=%2$s', $site_id, get_user_locale() );
		$wpcom_api_version = '1.2';
		$response          = Client::wpcom_json_api_request_as_blog( $wpcom_endpoint, $wpcom_api_version );
		$response_code     = wp_remote_retrieve_response_code( $response );
		$body              = json_decode( wp_remote_retrieve_body( $response ) );

		if ( is_wp_error( $response ) || empty( $response['body'] ) || 200 !== $response_code ) {
			return new WP_Error( 'site_data_fetch_failed', 'Site data fetch failed', array( 'status' => $response_code ? $response_code : 400 ) );
		}

		return rest_ensure_response( $body );
	}
}
