const WEBSOCKET = function (model) {
  let wsUrl = ['localhost', 'silvrtree.co.uk'];
  let wsPort = '9000';
  const useUrl = 0;

  if ('https:' === document.location.protocol) {
    wsUrl = `wss://${ wsUrl[useUrl] }`;
    wsPort = '';
  }
  else {
    // wsUrl = 'ws://localhost:3001';
    wsUrl = `ws://${ wsUrl[useUrl] }`;
    wsPort = '9000';
  }

  console.log('>> wsUrl', wsUrl);
  this.socket = null;
  this.timer = 0;
  this.clock = null;

  this.startWebSocket = function () {
    'use strict';

    const url = (wsPort === '') ? wsUrl : `${wsUrl }:${ wsPort}`;
    console.log('Starting socket', url);
    const wsCtor = window['MozWebSocket'] ? MozWebSocket : WebSocket;
    this.socket = new wsCtor(url, 'stream');

    this.socket.onopen = this.handleWebsocketOnOpen.bind(this);
    this.socket.onmessage = this.handleWebsocketMessage.bind(this);
    this.socket.onclose = this.handleWebsocketClose.bind(this);
    this.socket.onerror = function (e) {
      console.error(e);
    };
  };

  this.send = function (msg) {
    console.log('Sending', msg);
    this.socket.send(msg);
  };

  this.handleData = function (d) {
    model.trigger('message', d);
  };

  this.handleWebsocketOnOpen = function () {
    'use strict';
    this.retry = 0;

    console.log('**** Websocket Connected ****');
    this.clock = new Date();
  };

  this.handleWebsocketMessage = function (message) {
    let command;

    try {
      command = JSON.parse(message.data);
    }
    catch (e) { /* Do nothing */
    }
    if (command)
      this.handleData.call(this, command);
  };

  this.handleWebsocketClose = function () {
    console.error('WebSocket Connection Closed.');
    const now = new Date();

    // const uptime = now.getTime() - this.clock.getTime();
    const uptime = 1;
    console.log('Socket alive for', uptime / 1000);
    const self = this;
    console.log('Waiting ', 15000);
    this.timer = setTimeout(function () {
      self.startWebSocket();
    }, 15000);
  };

  this.startWebSocket();
};