<?php
/**
 * Health check endpoints.
 *
 * @package Recast\WCS
 */

namespace Recast\WCS\Rest;

use Recast\WCS\Health\Scanner;
use Recast\WCS\Support\Gateways;

defined( 'ABSPATH' ) || exit;

/**
 * GET /health returns the last scan; POST /health/scan starts a new one. Both only read
 * subscriptions, so they need the read capability.
 */
final class HealthController extends AbstractController {

	/**
	 * {@inheritdoc}
	 *
	 * @return void
	 */
	public function register_routes() {
		$this->route(
			'/health',
			array(
				'methods'  => \WP_REST_Server::READABLE,
				'callback' => array( $this, 'get_health' ),
			)
		);
		$this->route(
			'/health/scan',
			array(
				'methods'  => \WP_REST_Server::CREATABLE,
				'callback' => array( $this, 'scan' ),
			)
		);
	}

	/**
	 * Handles GET /health.
	 *
	 * @return \WP_REST_Response
	 */
	public function get_health() {
		return $this->respond( $this->present( Scanner::result() ) );
	}

	/**
	 * Handles POST /health/scan.
	 *
	 * @return \WP_REST_Response
	 */
	public function scan() {
		return $this->respond( $this->present( Scanner::start() ) );
	}

	/**
	 * Adds display names and the statuses each check covers.
	 *
	 * @param array<string, mixed> $result Scan result.
	 * @return array<string, mixed>
	 */
	private function present( array $result ) {
		$result['statuses'] = Scanner::CHECKS;
		if ( isset( $result['checks']['gateway_missing']['gateways'] ) ) {
			$names = array();
			foreach ( $result['checks']['gateway_missing']['gateways'] as $id => $count ) {
				$names[] = array(
					'id'    => (string) $id,
					'name'  => Gateways::name( (string) $id ),
					'count' => (int) $count,
				);
			}
			$result['checks']['gateway_missing']['gateways'] = $names;
		}
		return $result;
	}
}