/*global angular, WebSocket, localStorage, console */
angular.module('app').service('stdout', ['$window', function ($window) {
	'use strict';
	
	var callback,
		websocket,
		token = localStorage.getItem('access_token');

	this.subscribe = function (path, _callback) {
		callback = _callback;

		var proto = ($window.location.protocol === 'https:' ? 'wss' : 'ws'),
			route = [proto, "://", $window.location.host, '/api/stream/stdout/', path, '?access_token=', token].join('');

		websocket = new WebSocket(route);
		websocket.onmessage = function (event) {
			if (callback !== undefined) {
				callback(event.data);
			}
		};
		websocket.onclose = function (event) {
			console.log('websocket closed at ' + path);
		};
	};

	this.unsubscribe = function () {
		callback = undefined;
		if (websocket !== undefined) {
			console.log('unsubscribing websocket at ' + websocket.url);
			websocket.close();
			websocket = undefined;
		}
	};
}]);