var app = getApp();
const Paho = require('./paho-mqtt.js');

var mqttApi = {
  /*---- 获取连接 ----*/
  connect: function (cb) {
    var that = this;
    var client = app.mqttParam.client;
    if (client && client.isConnected()) {
      return;
    }
    var userInfo = wx.getStorageSync("userInfo");
    var randomString = "";
    for (var i = 1; i <= 5; i++) {
      randomString += parseInt(Math.random() * 10);
    }
    var clientId = "swxclientId-member-" + app.globalData.tenantId + "-" + app.globalData.shopNo + "-" + app.globalData.posNo + randomString;
    client = new Paho.Client(app.mqttParam.wsServer, 0, clientId);
    client.connect({
      useSSL: false,
      cleanSession: false,
      keepAliveInterval: 2,
      onSuccess: function () {
        app.mqttParam.client = client;
        client.onMessageArrived = function (msg) {
          console.log("----------订阅消息", msg);
          var title = msg.destinationName;
          if (title.indexOf('pay') > -1) {
            if (typeof app.globalFunction.scanPayCodeCallBack === 'function') {
              app.globalFunction.scanPayCodeCallBack(msg.payloadString);
            }
          } else if (title.indexOf('couponconsume') > -1) {
            app.globalFunction.consumeCouponCallBack(msg.payloadString);
          }
        }

        client.onConnectionLost = function (responseObject) {
          if (typeof app.globalFunction.onConnectionLost === 'function') {
            return app.globalData.onConnectionLost(responseObject)
          }
          if (responseObject.errorCode !== 0) {
          }
        }

        if (typeof cb === 'function') {
          cb();
        }
      }
    });
  },

  /*----订阅 ----*/
  subscribe: function (filter, subscribeOptions) {
    var that = this;
    var client = app.mqttParam.client;
    if (client && client.isConnected()) {
      client.subscribe(filter, {
        qos: 2
      });
      console.log("mqtt订阅成功")
    } else {
      that.connect(function () {
        client = app.mqttParam.client;
        if (client && client.isConnected()) {
          client.subscribe(filter, {
            qos: 2
          });
          console.log("mqtt订阅成功")
        }
      })
    }
  },

  /*----废弃订阅 ----*/
  unsubscribe: function (filter, subscribeOptions) {
    var client = app.mqttParam.client;
    if (client && client.isConnected()) {
      client.unsubscribe(filter);
    }
  },

  /*----发布消息----*/
  publish: function (topic, message, qos = 0, retained = false) {
    // 发布
    var that = this;
    var client = app.mqttParam.client;
    if (client && client.isConnected()) {
      var message = new Paho.Message(message);
      message.destinationName = topic;
      message.qos = qos;
      message.retained = retained;
      return client.send(message);
    } else {
      that.connect(function () {
        client = app.mqttParam.client;
        if (client && client.isConnected()) {
          var message = new Paho.Message(message);
          message.destinationName = topic;
          message.qos = qos;
          message.retained = retained;
          return client.send(message);
          return;
        }
      });
      wx.showToast({
        title: '发送失败',
        icon: 'success',
        duration: 2000
      });
    }
  },

  setOnMessageArrived: function (onMessageArrived) {
    if (typeof onMessageArrived === 'function') {
      onMessageArrived();
    }
  },

  startReconnect: function () {
    // 重连机制
    var that = this;
    var interval = app.interval;
    clearInterval(interval);
    interval = setInterval(function () {
      var client = app.mqttParam.client;
      if (client != null) {
        that.connect();
      }
    }, 10000);
  },

  setOnConnectionLost: function (onConnectionLost) {
    if (typeof onConnectionLost === 'function') {
      onConnectionLost();
    }
  }
}

module.exports = {
  api: mqttApi
}