<?php
/**
 * Settings REST controller.
 *
 * @package HostKhata
 */

namespace HostKhata\Rest;

defined( 'ABSPATH' ) || exit;

use HostKhata\Core\Capabilities;
use HostKhata\Settings\Settings;
use WP_Error;
use WP_REST_Request;
use WP_REST_Response;
use WP_REST_Server;

/**
 * `GET /hostkhata/v1/settings` and `POST /hostkhata/v1/settings`.
 *
 * @since 0.1.0
 */
final class SettingsController extends BaseController {

	/**
	 * Route base.
	 *
	 * @var string
	 */
	protected $rest_base = 'settings';

	/**
	 * Settings.
	 *
	 * @var Settings
	 */
	private $settings;

	/**
	 * Constructor.
	 *
	 * @param Settings $settings Settings.
	 */
	public function __construct( Settings $settings ) {
		$this->settings = $settings;
	}

	/**
	 * Registers the routes.
	 *
	 * @since 0.1.0
	 *
	 * @return void
	 */
	public function register_routes() {
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base,
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_settings' ),
					'permission_callback' => Permissions::require_capability( Capabilities::ACCESS_APP ),
				),
				array(
					'methods'             => WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'save_settings' ),
					'permission_callback' => Permissions::require_capability( Capabilities::MANAGE_SETTINGS ),
					'args'                => array(
						'values' => array(
							'description' => __( 'Settings to change, keyed by setting name.', 'hostkhata' ),
							'type'        => 'object',
							'required'    => true,
						),
					),
				),
			)
		);
	}

	/**
	 * Returns the settings and their schema.
	 *
	 * @since 0.1.0
	 *
	 * @return WP_REST_Response
	 */
	public function get_settings(): WP_REST_Response {
		return rest_ensure_response( $this->settings->export_for_app() );
	}

	/**
	 * Saves settings.
	 *
	 * @since 0.1.0
	 *
	 * @param WP_REST_Request $request Request.
	 * @return WP_REST_Response|WP_Error
	 */
	public function save_settings( WP_REST_Request $request ) {
		$values = $request->get_param( 'values' );

		if ( ! is_array( $values ) ) {
			return $this->error( 'hostkhata_invalid_settings', __( 'Settings must be an object.', 'hostkhata' ) );
		}

		$result = $this->settings->update( $values );

		if ( $result['errors'] ) {
			return $this->error(
				'hostkhata_invalid_settings',
				__( 'Some settings are not valid.', 'hostkhata' ),
				400,
				array( 'errors' => $result['errors'] )
			);
		}

		return rest_ensure_response( $this->settings->export_for_app() );
	}
}