<?php
/**
 * Typekit Client
 *
 * @package    Powerkit
 * @subpackage Modules/Helper
 */

/**
 * Typekit Client Class
 */
class Powerkit_Typekit_Api {

	/**
	 * Timeout.
	 *
	 * @var int $timeout Timeout.
	 */
	private $timeout = 30;

	/**
	 * Api link.
	 *
	 * @var string $api link.
	 */
	private $api = 'https://typekit.com/api/v1/json/kits/';

	/**
	 * Create a new instance of the client
	 *
	 * @param number $timeout Connection timeout in seconds (default is 30 seconds).
	 */
	public function __construct( $timeout = 30 ) {
		$this->timeout = $timeout;
	}

	/**
	 * Make a request and read the response. If succesful,
	 * a tuple of HTTP status code and response data is
	 * returned. If an error occurs NULL is returned.
	 *
	 * @param number $path Path.
	 * @param string $token Token.
	 * @return (number, string)|null
	 */
	private function make_request( $path, $token ) {

		$remote_get = wp_remote_get(
			$path, array(
				'timeout'     => $this->timeout,
				'httpversion' => '1.1',
				'headers'     => array(
					'Accept'          => 'application/json',
					'Host'            => 'typekit.com',
					'X-Typekit-Token' => $token,
				),
			)
		);

		if ( ! is_wp_error( $remote_get ) || wp_remote_retrieve_response_code( $remote_get ) === 200 ) {
			return array( '200', $remote_get['body'] );
		} else {
			return null;
		}
	}

	/**
	 * Get one or more kits. If kit identifier is not given
	 * all kits are returned.
	 *
	 * @param string $id     The kit identifier (optional).
	 * @param string $token  Your Typekit API token (optional).
	 * @param bool   $cached Cache result.
	 * @return string|null NULL if retrieving the kit(s) failed, otherwise it return the data.
	 */
	public function get( $id = null, $token = null, $cached = true ) {

		$transient = sprintf( 'pk_typekit_%s_s', $id, $token );

		$data = $cached ? get_option( $transient ) : null;

		if ( null === $data || false === $data ) {

			if ( ! is_null( $id ) ) {
				if ( ! is_null( $token ) ) {
					$result = $this->make_request( $this->api . $id . '/', $token );
				} else {
					$result = $this->make_request( $this->api . $id . '/published', $token );
				}
			} else {
				$result = $this->make_request( $this->api, $token );
			}

			if ( ! is_null( $result ) ) {
				list($status, $data) = $result;

				if ( '200' === $status ) {
					$data = json_decode( $data, true );
				}
			}

			update_option( $transient, $data, false );
		}

		return $data;
	}
}