'use strict';
 
const debug = require('debug')('Cantabile');
const EndPoint = require('./EndPoint');
const fetch = require('node-fetch');
 
/**
 * Provides access to Cantabile's engine object for start/stop control
 * 
 * Access this object via the {{#crossLink "Cantabile/engine:property"}}{{/crossLink}} property.
 *
 * @class Engine
 * @extends EndPoint
 */
class Engine
{
    constructor(owner)
    {
		this.owner = owner;
    }
 
	/**
	 * Returns a promise to provide the started state of Cantabile's audio engine.
	 * 
	 * This API is only available via  AJAX, and not WebSocket
	 *
	 * @method isStarted
	 * @type {Promise|Boolean} 
	 */
	 async isStarted()
	{
		let f = await fetch(EndPoint.joinPath(this.owner.hostUrl, "api/engine/")).then(r => r.json());
		return f.isStarted;
	}
 
	/**
	 * Starts Cantabile's audio engine
	 * 
	 * This API is only available via  AJAX, and not WebSocket
	 *
	 * @method start
	 * @type {Promise} 
	 */
	async start()
	{
		await fetch(EndPoint.joinPath(this.owner.hostUrl, "api/engine/start"), { method: "POST" });
	}
 
	/**
	 * Stops Cantabile's audio engine
	 * 
	 * This API is only available via  AJAX, and not WebSocket
	 *
	 * @method start
	 * @type {Promise} 
	 */
	async stop()
	{
		await fetch(EndPoint.joinPath(this.owner.hostUrl, "api/engine/stop"), { method: "POST" });
	}
 
	/**
	 * Restarts Cantabile's audio engine
	 * 
	 * This API is only available via  AJAX, and not WebSocket
	 *
	 * @method restart
	 * @type {Promise} 
	 */
	 async restart()
	 {
		 await fetch(EndPoint.joinPath(this.owner.hostUrl, "api/engine/restart"), { method: "POST" });
	 }
 
 	/**
	 * Toggles the audio engine between started and stopped
	 * 
	 * This API is only available via  AJAX, and not WebSocket
	 *
	 * @method restart
	 * @type {Promise} 
	 */
	  async startStop()
	  {
		  await fetch(EndPoint.joinPath(this.owner.hostUrl, "api/engine/startStop"), { method: "POST" });
	  }
  
  }
 
 
 
module.exports = Engine;