<?php
/**
 * Leaderboard, points history and staff awards.
 *
 * @package SpaceBay
 */

namespace SpaceBay\Rest;

use SpaceBay\Gamification\Gamification;
use SpaceBay\Gamification\Points;
use WP_Error;
use WP_REST_Request;
use WP_REST_Server;

defined( 'ABSPATH' ) || exit;

/**
 * Routes for points and badges.
 */
final class GamificationController extends Controller {

	/**
	 * Registers the routes.
	 *
	 * @return void
	 */
	public function register_routes() {
		register_rest_route(
			$this->namespace,
			'/leaderboard',
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'leaderboard' ),
					'permission_callback' => array( $this, 'permission_leaderboard' ),
					'args'                => array(
						'period' => array(
							'type'    => 'string',
							'enum'    => array( 'week', 'month', 'all' ),
							'default' => 'week',
						),
						'limit'  => array(
							'type'    => 'integer',
							'default' => 50,
							'minimum' => 1,
							'maximum' => 100,
						),
					),
				),
			)
		);

		register_rest_route(
			$this->namespace,
			'/me/points',
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'history' ),
					'permission_callback' => array( $this, 'permission_points' ),
					'args'                => $this->paging_args( 50 ),
				),
			)
		);
	}

	/**
	 * Logged-in members while the leaderboard is on.
	 *
	 * @return true|WP_Error
	 */
	public function permission_leaderboard() {
		if ( ! Gamification::leaderboard_enabled() ) {
			return $this->off();
		}

		return $this->permission_logged_in();
	}

	/**
	 * Logged-in members while points are on.
	 *
	 * @return true|WP_Error
	 */
	public function permission_points() {
		if ( ! Gamification::enabled() ) {
			return $this->off();
		}

		return $this->permission_logged_in();
	}

	/**
	 * Returns the leaderboard.
	 *
	 * @param WP_REST_Request $request Request.
	 * @return \WP_REST_Response
	 */
	public function leaderboard( $request ) {
		return rest_ensure_response( Gamification::leaderboard( $request['period'], get_current_user_id(), (int) $request['limit'] ) );
	}

	/**
	 * Returns the viewer's point changes.
	 *
	 * @param WP_REST_Request $request Request.
	 * @return \WP_REST_Response
	 */
	public function history( $request ) {
		$result = Points::history( get_current_user_id(), $request['page'], $request['per_page'] );

		return $this->paged_response( $result['items'], $result['total'], $request['per_page'] );
	}

	/**
	 * Error used while points are switched off.
	 *
	 * @return WP_Error
	 */
	private function off() {
		return new WP_Error( 'spacebay_points_off', __( 'Points and badges are switched off in this community.', 'spacebay' ), array( 'status' => 404 ) );
	}
}