/**
 * desc: js和客户端的交互模块，尽量封装到对业务逻辑透明，为移植到其他平台做准备
 * author: wangyang
 * date: 2015-04-11
 */

//本地回调对象
var NativeCallback;
var NativeDataAdapter;

define(function (require) {
  var helper = require('helper');
  var config = require('config');
  var pingpp = require('pingpp');
  //客户端接口类
  function NativeApi() {
    if (typeof NativeApi.instance === 'object') {
      return NativeApi.instance;
    }
    NativeApi.instance = this;
    this.getUserInfoCallback = null;
    this.shareCallback = null;
    this.getSignCallback = null;
    this.loginCallback = null;
    this.isWxAppInstalledCallback = null;
    this.payCallback = null;
    this.selectAddressCallback = null;
    this.chooseImageCallback = null;
    this.uploadImageCallbacks = {};
    this.selectPetTypeCallback = null;
    this.charge = null;
    this.keyboardEventTimer = 0;
    this.originalHeight = document.body.scrollHeight;
    this.keyboardIsOpen = false;
    this.keyboardIsClose = false;
  }

  NativeApi.prototype = {
    //获取用户信息
    getUserInfo: function (callback) {
      var that = this;
      var _callback = 'NativeCallback.getUserInfo';
      helper.osProxy({
        android: function () {
          var param = {
            callback: _callback
          };
          var param_str = JSON.stringify(param);
          window.jsapi.getUserInfo(param_str);
        },
        ios: function () {
          window.location.href = 'http://callclient?method=getUserInfo&callback=' + _callback;
        },
        wx: function () {
          //此处有一个循环引用
          require('api').getO2oUserInfo({
            request_from: 'weixin',
            user_id: localStorage.getItem('xyhwxUserID')
          }, function (res) {
            if (typeof(that.getUserInfoCallback) == 'function') {
              that.getUserInfoCallback(res);
            }
          });
        },
        cb: function () {
          require(['../../common/js/ctk-1.0.0'], function (ctk) {
            ctk.logged({
              yes: function (res) {
                console.log('已登录', res);
                //判断用户已登录的回调函数，用户的accessToken存放在res.accessToken内
                require('api').getO2oUserInfo({
                  from: 'chubao',
                  accessToken: res.accessToken
                }, function (res) {
                  if (typeof(that.getUserInfoCallback) == 'function') {
                    that.getUserInfoCallback(res);
                  }
                });
              },
              no: function (res) {
                ctk.login({
                  phone: '',
                  success: function (res) {
                    require('api').getO2oUserInfo({
                      from: 'chubao',
                      accessToken: res.accessToken
                    }, function (res) {
                      if (typeof(that.getUserInfoCallback) == 'function') {
                        that.getUserInfoCallback(res);
                      }
                    });
                  },
                  fail: function (res) {
                    // alert('login failed!');
                  }
                });
              }
            });
          })
        }
      });
      var callback = typeof (arguments[0]) == 'function' ? arguments[0] : null;
      this.getUserInfoCallback = callback;
    },
    //从web返回APP
    back: function () {
      helper.osProxy({
        android: function () {
          window.jsapi.exitWebView();
        },
        ios: function () {
          window.location.href = 'http://callclient?method=exitWebView';
        },
        wx: function () {
          require(['../../common/js/jweixin-1.0.0'], function (wx) {
            wx.closeWindow();
          });
        }
      });
    },
    //登录
    login: function (callback) {
      var that = this;
      var _callback = 'NativeCallback.login';
      helper.osProxy({
        android: function () {
          var param = {
            callback: _callback
          };
          var param_str = JSON.stringify(param);
          window.jsapi.goLogin(param_str);
        },
        ios: function () {
          window.location.href = 'http://callclient?method=goLogin&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[0]) == 'function' ? arguments[0] : null;
      this.loginCallback = callback;
    },
    //分享
    share: function (title, content, img_url, url, app_id, callback) {
      var param = {
        "share_title": title,
        "share_string": content,
        "share_img_url": img_url ? encodeURI(img_url) : 'http://common.yiguanjia.club/images/logo.png',
        "share_url": url ? encodeURI(url) : 'http://common.yiguanjia.club',
        "share_app_id": app_id
      };
      var _callback = 'NativeCallback.share';
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.doShare(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=doShare&param=' + param_str + '&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[5]) == 'function' ? arguments[5] : null;
      this.shareCallback = callback;
    },
    //参数加密验证
    getSign: function (param, callback) {
      var that = this;
      for (var x in param) {
        param[x] = param[x].toString();
      }
      var param = {
        sign_json_string: param
      };
      var _callback = 'NativeCallback.getSign';
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.sign(param_str);
        },
        //支付
        pay: function (params, callback) {
            var that = this;
            var param = {};
            var _callback = 'NativeCallback.pay';
            helper.osProxy({
                android: function () {
                    param['charge'] = params.charge;
                    param['callback'] = _callback;
                    var param_str = JSON.stringify(param);
                    window.jsapi.pay(param_str);
                },
                // ios 的可以无视了，本项目暂时用不到
                ios: function () {
                    NativeDataAdapter.charge = JSON.stringify(params.charge);
                    param['charge'] = 'NativeDataAdapter.charge';
                    var param_str = JSON.stringify(param);
                    window.location.href = 'http://callclient?method=pay&param=' + encodeURIComponent(param_str) + '&callback=' + _callback;
                },
                wx: function () {
                  // 这个我就不知道说什么好了，判断当前环境为test的话，走ping++模拟支付
                    if (config.test) {
                        pingpp.createPayment(params.charge, function (result, err) {
                            if (result == "success") {
                                // 只有微信公众账号 wx_pub 支付成功的结果会在这里返回，其他的支付结果都会跳转到 extra 中对应的 URL。
                                var res = {
                                    success: true
                                };
                                callback(res);
                            } else if (result == "fail") {
                                // charge 不正确或者微信公众账号支付失败时会在此处返回
                                console.log(err);
                            } else if (result == "cancel") {
                                // 微信公众账号支付取消支付
                                console.log(err);
                            }
                        });
                    }else {
                      // 当前为正式环境，通过url传值到微信支付授权的url，然后在该url下面进行微信支付
                      /*
                      * 参数说明：带 * 号的为微信支付用到的
                      * appId：* 公众号名称，由商户传入
                      * nonceStr：* 随机串
                      * prepay：预付款ID
                      * signType：* 微信签名方式：
                      * timeStamp：* 时间戳，自1970年以来的秒数
                      * paySign：* 微信签名
                      * amount：实付金额
                      * created：建立
                      * body：订单名字
                      * bookingTime：预约时间
                      * */
                        var option = params['charge'].credential.wx_pub; // 支付凭据
                        var prepay = option["package"].replace('prepay_id=', '');
                        var bookingTime = params.orderInfo.booking_time_str;
                        location.href = '/webapp/o2o/module/pay/index.html?appId='
                            + option.appId + '&nonceStr=' + option.nonceStr
                            + '&package=' + prepay + '&signType='
                            + option.signType + '&timeStamp='
                            + option.timeStamp + '&paySign='
                            + option.paySign + '&amount=' + params['charge'].amount
                            + '&created=' + params['charge'].created + '&body='
                            + params['charge'].body + '&bookingTime=' + bookingTime;
                    }
                }
            });
            var callback = typeof (arguments[1]) == 'function' ? arguments[1] : null;
            this.payCallback = callback;
        },
        wx: function () {
          //目前加上参数，绕过验证，后面再加上相关的验证
          param['user_id'] = localStorage.getItem('xyhwxUserID');
          param['request_from'] = 'weixin';
          if (that.getSignCallback) {
            that.getSignCallback(param);
          }
        }
      });
      var callback = typeof (arguments[1]) == 'function' ? arguments[1] : null;
      this.getSignCallback = callback;
    },
    //支付
    pay: function (params, callback) {
      var that = this;
      var param = {};
      var _callback = 'NativeCallback.pay';
      helper.osProxy({
        android: function () {
          param['charge'] = params.charge;
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.pay(param_str);
        },
        ios: function () {
          NativeDataAdapter.charge = JSON.stringify(params.charge);
          param['charge'] = 'NativeDataAdapter.charge';
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=pay&param=' + encodeURIComponent(param_str) + '&callback=' + _callback;
        },
        wx: function () {
          if (config.test)
          {
            pingpp.createPayment(params.charge, function (result, err) {
              if (result == "success") {
                // 只有微信公众账号 wx_pub 支付成功的结果会在这里返回，其他的支付结果都会跳转到 extra 中对应的 URL。
                var res = {
                  success: true
                };
                callback(res);
              } else if (result == "fail") {
                // charge 不正确或者微信公众账号支付失败时会在此处返回
                console.log(err);
              } else if (result == "cancel") {
                // 微信公众账号支付取消支付
                console.log(err);
              }
            });
          } else {
            var option = params['charge'].credential.wx_pub;
            var prepay = option["package"].replace('prepay_id=', '');
            var bookingTime = params.orderInfo.booking_time_str;
            var isSpecial = params['isSpecial']
            location.href = '/webapp/o2o/module/pay/index.html?appId='
              + option.appId + '&nonceStr=' + option.nonceStr
              + '&package=' + prepay + '&signType='
              + option.signType + '&timeStamp='
              + option.timeStamp + '&paySign='
              + option.paySign + '&amount=' + params['charge'].amount
              + '&created=' + params['charge'].created + '&body='
              + params['charge'].body + '&bookingTime=' + bookingTime
              + '&isSpecial=' + isSpecial;
          }
        }
      });
      var callback = typeof (arguments[1]) == 'function' ? arguments[1] : null;
      this.payCallback = callback;
    },
    //检测是否安装了微信
    isWxAppInstalled: function (callback) {
      var _callback = 'NativeCallback.isWxInstalled';
      var param = {};
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.isWxAppInstalled(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=isWxAppInstalled&param=' + param_str + '&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[0]) == 'function' ? arguments[0] : null;
      this.isWxAppInstalledCallback = callback;
    },
    //选择地址
    selectAddress: function (callback) {
      var _callback = 'NativeCallback.selectAddress';
      var param = {};
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.selectAddress(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=selectAddress&param=' + param_str + '&callback=' + _callback;
        }/*,
         WX: function() {
         require('address').getList(function(res){
         if (typeof(that.selectAddressCallback) == 'function') {
         that.selectAddressCallback(res);
         }
         })
         }*/
      });
      var callback = typeof (arguments[0]) == 'function' ? arguments[0] : null;
      this.selectAddressCallback = callback;
    },
    //打开一个链接
    openURL: function (new_param) {
      if (config.appVersion < 2.6) {
        return false;
      }
      var param = {
        url: 'http://common.yiguanjia.club'
      };
      if (typeof new_param === 'undefined') {
        new_param = {};
      }
      for (var x in new_param) {
        if (param.hasOwnProperty(x)) {
          param[x] = new_param[x];
        }
      }
      helper.osProxy({
        android: function () {
          var param_str = JSON.stringify(param);
          window.jsapi.openURL(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=openURL&param=' + param_str;
        }
      });
    },
    //打开多个页面时页面之间通信
    postMessage: function (data) {
      if (config.appVersion < 2.6) {
        return false;
      }
      var _callback = 'NativeCallback.postMessage';
      helper.osProxy({
        android: function () {
          var param = {
            data: JSON.stringify(data),
            callback: _callback
          };
          var param_str = JSON.stringify(param);
          window.jsapi.postMessage(param_str);
        },
        ios: function () {
          var param = {
            data: data,
            callback: _callback
          };
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=postMessage&param=' + param_str;
        }
      });
    },
    //选择图片
    chooseImage: function (new_param, callback) {
      if (config.appVersion < 2.6) {
        return false;
      }
      var param = {
        sourceType: ['album', 'camera'],
        count: 9,
        clip: false,
        clipSize: 320
      };
      if (typeof new_param === 'undefined') {
        new_param = {};
      }
      for (var x in new_param) {
        if (param.hasOwnProperty(x)) {
          param[x] = new_param[x];
        }
      }
      var _callback = 'NativeCallback.chooseImage';
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.chooseImage(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=chooseImage&param=' + param_str + '&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[1]) == 'function' ? arguments[1] : null;
      this.chooseImageCallback = callback;
    },
    //预览图片
    previewImage: function (urls, current) {
      if (!config.isWX && config.appVersion < 2.6) {
        return false;
      }
      var param = {
        urls: urls,
        current: current,
      };
      var param_str = JSON.stringify(param);
      helper.osProxy({
        android: function () {
          window.jsapi.previewImage(param_str);
        },
        ios: function () {
          window.location.href = 'http://callclient?method=previewImage&param=' + param_str;
        },
        wx: function () {
          require(['../../common/js/jweixin-1.0.0'], function (wx) {
            wx.previewImage({
              current: current, // 当前显示图片的http链接
              urls: urls // 需要预览的图片http链接列表
            });
          });
        }
      });
    },
    //上传图片
    uploadImage: function (new_param, callback) {
      if (config.appVersion < 2.6) {
        return false;
      }
      var param = {
        localId: '',
        isShowProgressTips: true,
      };
      if (typeof new_param === 'undefined') {
        new_param = {};
      }
      for (var x in new_param) {
        if (param.hasOwnProperty(x)) {
          param[x] = new_param[x];
        }
      }
      var _callback = 'NativeCallback.uploadImage';
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.uploadImage(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=uploadImage&param=' + param_str + '&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[1]) == 'function' ? arguments[1] : null;
      this.uploadImageCallbacks[param.localId] = callback;
    },
    // 选择宠物
    selectPetType: function (callback) {
      var _callback = 'NativeCallback.selectPetType';
      var param = {};
      helper.osProxy({
        android: function () {
          param['callback'] = _callback;
          var param_str = JSON.stringify(param);
          window.jsapi.selectPetType(param_str);
        },
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=selectPetType&param=' + param_str + '&callback=' + _callback;
        }
      });
      var callback = typeof (arguments[0]) == 'function' ? arguments[0] : null;
      this.selectPetTypeCallback = callback;
    },
    // 拨打电话
    call: function (telephone) {
      var that = this;
      helper.osProxy({
        android: function () {
          if (config.appVersion < '2.2') {
            //无法调用拨号，弹出
            $(document).trigger('spa:openpanel', ['simpleAlert', {
              message: '客服热线:' + telephone
            }]);
          } else {
            var param = {
              telephone: telephone
            };
            var param_str = JSON.stringify(param);
            window.jsapi.call(param_str);
          }
        },
        ios: function () {
          window.location.href = 'tel:' + telephone;
        }
      });
    },
    //ios
    //开关滑动返回
    switchPopGesture: function (flag) {
      var param = {
        enable: flag
      };
      helper.osProxy({
        ios: function () {
          var param_str = JSON.stringify(param);
          window.location.href = 'http://callclient?method=switchPopGesture&param=' + param_str;
        }
      });
    },
    //安卓
    //代理物理返回按钮
    delegateBackButton: function (flag, callback) {
      var param = {
        enable: flag,
        callback: 'NativeCallback.back'
      };
      helper.osProxy({
        android: function () {
          var param_str = JSON.stringify(param);
          window.jsapi.delegateBackButton(param_str);
        }
      });
    },
    //注册键盘事件，由于安卓回调有问题，所以改为js setInterval自定义检测
    registerEvent: function (enable) {
      if (!enable) {
        if (this.keyboardEventTimer != 0) {
          clearInterval(this.keyboardEventTimer);
        }
        return;
      }
      var that = this;
      this.keyboardIsOpen = false;
      this.keyboardIsClose = false;

      helper.osProxy({
        android: function () {
          that.keyboardEventTimer = setInterval(function () {
            if (that.originalHeight > document.body.scrollHeight) {
              if (!that.keyboardIsOpen) {
                that.keyboardIsOpen = true;
                that.keyboardIsClose = false;
                $('input, textarea').trigger('openKeyboard');
              }
            } else {
              if (!that.keyboardIsClose) {
                that.keyboardIsClose = true;
                that.keyboardIsOpen = false;
                $('input, textarea').trigger('closeKeyboard');
              }
            }
          }, 50);
        }
      });
    }
  };

  /*
   * 回调类
   */
  function CallbackApi() {
    if (typeof CallbackApi.instance === 'object') {
      return CallbackApi.instance;
    }
    CallbackApi.instance = this;
  }

  CallbackApi.prototype = {
    formatNativeParam: function (res) {
      var f_res = helper.osProxy({
        android: function () {
          var reg = new RegExp('(\r\n|\r|\n)', 'g');
          res = JSON.stringify(res).replace(reg, '');
          return JSON.parse(res);
        },
        ios: function () {
          if (res && res.hasOwnProperty('success')) {
            if (res.success == '1') {
              res.success = true;
            } else {
              res.success = false;
            }
          }
          return res;
        }
      });
      return f_res;
    },
    getUserInfo: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.getUserInfoCallback) == 'function') {
        native_api.getUserInfoCallback(f_res);
      }
    },
    login: function (res) {
      //fix by wangyang
      //ios客户端登陆回调的通知在2.0有点早，改为延时0.1s再重新获取一次用户信息
      var f_res = this.formatNativeParam(res);
      var nativeApi = new NativeApi();
      if (nativeApi.loginCallback != null) {
        setTimeout(function () {
          nativeApi.getUserInfo(nativeApi.loginCallback);
          nativeApi.loginCallback(f_res);
        }, 100);
      }
    },
    share: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.shareCallback) == 'function') {
        native_api.shareCallback(f_res);
      }
    },
    getSign: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.getSignCallback) == 'function') {
        native_api.getSignCallback(f_res);
      }
    },
    pay: function (res) {
      var f_res = this.formatNativeParam(res);
      if (f_res.success) {
        f_res.message = '支付成功';
      } else {
        helper.osProxy({
          android: function () {
            if (config.appVersion < '2.2') {
              if (f_res.message == 'user_cancelled') {
                f_res.message = '取消支付';
              } else {
                f_res.message = '支付异常，请稍后再试';
              }
            } else {
              switch (f_res.error_code) {
                case 'fail':
                  f_res.message = '支付失败';
                  break;
                case 'cancel':
                  f_res.message = '取消支付';
                  break;
                default:
                  f_res.message = '支付异常，请稍后再试';
                  break;
              }
            }
          },
          ios: function () {
            if (f_res.error_code == 5) {
              f_res.message = '取消支付';
            } else {
              f_res.message = '支付异常，请稍后再试';
            }
          }
        });
      }
      var native_api = new NativeApi();
      if (typeof (native_api.payCallback) == 'function') {
        native_api.payCallback(f_res);
      }
    },
    selectAddress: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      helper.osProxy({
        android: function () {
          //2.1返回的data是json字符串，特殊处理一下
          if (f_res.success && typeof (f_res.data) == 'string') {
            f_res.data = JSON.parse(f_res.data);
          }
        }
      });
      if (typeof (native_api.selectAddressCallback) == 'function') {
        native_api.selectAddressCallback(f_res);
      }
    },
    selectPetType: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.selectPetTypeCallback) == 'function') {
        native_api.selectPetTypeCallback(f_res);
      }
    },
    chooseImage: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.chooseImageCallback) == 'function') {
        native_api.chooseImageCallback(f_res);
      }
    },
    uploadImage: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (res.data.localId && typeof (native_api.uploadImageCallbacks[res.data.localId]) == 'function') {
        native_api.uploadImageCallbacks[res.data.localId](f_res);
      }
    },
    isWxInstalled: function (res) {
      var f_res = this.formatNativeParam(res);
      var native_api = new NativeApi();
      if (typeof (native_api.isWxAppInstalledCallback) == 'function') {
        native_api.isWxAppInstalledCallback(f_res);
      }
    },

    //以下回调为js自定义事件，注意，依赖jquery的trigger
    postMessage: function (res) {
      var f_res = this.formatNativeParam(res);
      f_res = helper.osProxy({
        android: function () {
          f_res.data = JSON.parse(f_res.data);
          return f_res;
        },
        ios: function () {
          return f_res;
        }
      });
      require(['$'], function ($) {
        $(document).trigger('postMessage', f_res);
      });
    },
    back: function () {
      require(['$'], function ($) {
        $(document).trigger('tapBackButton');
      });
    }
  };

  /*
   * 传递数据类，用于ios，某些复杂的json数据不适合通过url传递
   * 换一种思路，通过提供一个JS类给OC，然后OC调用js方法反查数据
   */
  function NativeDataCache() {
    if (typeof NativeDataCache.instance === 'object') {
      return NativeDataCache.instance;
    }
    NativeDataCache.instance = this;
    NativeDataCache.charge = '';
  }

  /**
   * android websocket支持
   */
  helper.osProxy({
    android: function () {
      if (typeof(WebSocketFactory) == 'undefined') {
        return false;
      }

      // window object
      var global = window;

      // WebSocket Object. All listener methods are cleaned up!
      var WebSocket = global.WebSocket = function (url) {
        // get a new websocket object from factory (check com.strumsoft.websocket.WebSocketFactory.java)
        this.socket = WebSocketFactory.getInstance(url);
        // store in registry
        if (this.socket) {
          WebSocket.store[this.socket.getId()] = this;
        } else {
          throw new Error('Websocket instantiation failed! Address might be wrong.');
        }
      };

      // private property
      WebSocket._keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

      // private method for decoding base64
      WebSocket._decode = function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

          enc1 = this._keyStr.indexOf(input.charAt(i++));
          enc2 = this._keyStr.indexOf(input.charAt(i++));
          enc3 = this._keyStr.indexOf(input.charAt(i++));
          enc4 = this._keyStr.indexOf(input.charAt(i++));

          chr1 = (enc1 << 2) | (enc2 >> 4);
          chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
          chr3 = ((enc3 & 3) << 6) | enc4;

          output = output + String.fromCharCode(chr1);

          if (enc3 != 64) {
            output = output + String.fromCharCode(chr2);
          }
          if (enc4 != 64) {
            output = output + String.fromCharCode(chr3);
          }

        }

        output = this._utf8_decode(output);

        return output;

      }

      // private method for UTF-8 decoding
      WebSocket._utf8_decode = function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while (i < utftext.length) {

          c = utftext.charCodeAt(i);

          if (c < 128) {
            string += String.fromCharCode(c);
            i++;
          } else if ((c > 191) && (c < 224)) {
            c2 = utftext.charCodeAt(i + 1);
            string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
            i += 2;
          } else {
            c2 = utftext.charCodeAt(i + 1);
            c3 = utftext.charCodeAt(i + 2);
            string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
            i += 3;
          }

        }

        return string;
      }

      // storage to hold websocket object for later invokation of event methods
      WebSocket.store = {};

      // static event methods to call event methods on target websocket objects
      WebSocket.onmessage = function (evt) {
        WebSocket.store[evt._target]['onmessage'].call(global, this._decode(evt._data));
      }

      WebSocket.onopen = function (evt) {
        WebSocket.store[evt._target]['onopen'].call(global, evt);
      }

      WebSocket.onclose = function (evt) {
        WebSocket.store[evt._target]['onclose'].call(global, evt);
      }

      WebSocket.onerror = function (evt) {
        WebSocket.store[evt._target]['onerror'].call(global, evt);
      }

      // instance event methods
      WebSocket.prototype.send = function (data) {
        this.socket.send(data);
      }

      WebSocket.prototype.close = function () {
        this.socket.close();
      }

      WebSocket.prototype.getReadyState = function () {
        this.socket.getReadyState();
      }
      ///////////// Must be overloaded
      WebSocket.prototype.onopen = function () {
        throw new Error('onopen not implemented.');
      };

      // alerts message pushed from server
      WebSocket.prototype.onmessage = function (msg) {
        throw new Error('onmessage not implemented.');
      };

      // alerts message pushed from server
      WebSocket.prototype.onerror = function (msg) {
        throw new Error('onerror not implemented.');
      };

      // alert close event
      WebSocket.prototype.onclose = function () {
        throw new Error('onclose not implemented.');
      };
    }
  })

  NativeDataAdapter = new NativeDataCache();
  NativeCallback = new CallbackApi();
  return new NativeApi();
})