self.importScripts("helper.js");
var parameters = GetRequest();
var cardToken = parameters["cardToken"];
cardToken = cardToken && decodeURIComponent(cardToken);
var errorTime = 0;
var socketURL = decodeURIComponent(parameters['socketURL']);
var intervaler;
doConnect();

function throttle(fn, delay) {
  var flag = true;
  errorTime += delay;
  return () => {
    if (!flag) return;
    flag = false;
    timer = setTimeout(() => {
      fn();
      flag = true;
    }, delay);
  };
}

function doConnect() {
  var ws = new WebSocket(socketURL);
  ws.binaryType = 'arraybuffer';
  intervaler = setInterval(() => {
    if (ws.readyState === 1) {
      ws.send("ping");
    } else {
      clearInterval(intervaler);
      self.postMessage('close');
    }
  }, 3000);
  ws.onerror = function () {
    ws.close();
    clearInterval(intervaler);
    throttle(doConnect, 100);
    if (errorTime > 1000) {
      self.postMessage('close');
    }
  }

  ws.addEventListener('open', function (event) {
    var verifyBuffer = VerifyCode('RK3923C1201900139', cardToken);
    ws.send(verifyBuffer);
  });

  ws.addEventListener('message', function (event) {
    var input = new Uint8Array(event.data);
    if (input[0] == 0xff) {
      self.postMessage(input);
    } else {
      self.postMessage(input);
    }
  });

  self.addEventListener('message', function (e) {
    if (e === 'close') {
      clearInterval(intervaler);
      ws.close();
    } else {
      ws.send(e.data);
    }
  }, false);
}

function GetRequest() {
  var url = location.search; // 获取url中"?"符后的字串
  var obj = new Object();
  if (url.indexOf("?") != -1) {
    var str = url.substr(1);
    strs = str.split("&");
    for (var i = 0; i < strs.length; i++) {
      obj[strs[i].split("=")[0]] = (strs[i].split("=")[1]);
    }
  }
  return obj;
}