import Setting from "@/setting";
import th from "element-ui/src/locale/lang/th";

const MAX_ERROR_NUMBER = 1000;

class Socket {
  constructor() {
    this.timer = null; //心跳定时器
    this.connectStatus = false; //连接状态
    this.reconnectTimer = 2000; //重连
    this.handClse = false; //手动关闭
    this.reconnetime = null; //重连 定时器
    this.networkStatus = true;
    this.connectLing = false; //连接是否进行中
    this.ws = null;
    this.vm = null;
    this.token = null;
    this.errorNumber = 0
  }

  wss(wsSocketUrl) {
    let ishttps = document.location.protocol == "https:";
    if (ishttps) {
      return wsSocketUrl.replace("ws:", "wss:");
    } else {
      return wsSocketUrl.replace("wss:", "ws:");
    }
  }

  startConnect(){
    if (!this.connectStatus && !this.connectLing) {
      let strategy = this.vm.$auth.$storage.getCookie("strategy"),
        token;
      if (this.vm.$auth.$storage.getCookie(`_token.${strategy}`)) {
        token = this.vm.$auth.$storage.getCookie(`_token.${strategy}`).split(" ")[1];
      }
      this.errorNumber = 0;
      this.connect(token);
    }
  }

  connect(token) {
    if (token === undefined) {
      return;
    }
    let wsUrl = Setting.wsSocketUrl
    // 判断是否是客户端
    if (process.browser) {
      // 是否已存服务器状态
      if (sessionStorage.getItem("SERVER_TYPE") !== 'nginx') {
        wsUrl = wsUrl + '/ws'
      }
    }
    this.token = token;
    this.ws = new WebSocket(this.wss(wsUrl) + '?type=user' + '&token=' + token);
    this.ws.onopen = this.onOpen.bind(this);
    this.ws.onerror = this.onError.bind(this);
    this.ws.onmessage = this.onMessage.bind(this);
    this.ws.onclose = this.onClose.bind(this);
    this.connectLing = true;
  }

  setVm(vm) {
    this.vm = vm;
  }

  close() {

  }

  onOpen() {
    this.ping();
    this.reconnetime = null;
    this.connectLing = false;
    this.connectStatus = true;
    this.errorNumber = 0;
    this.vm.$emit("socket-open");
  }

  ping() {
    var that = this;
    this.timer = setInterval(() => {
      that.send({type: "ping"});
    }, 10000);
  }

  send(data) {
    let that = this;
    //没有网络,或者没有连接
    if (!this.connectStatus || !this.networkStatus) {
      this.reconne();
    }
    return new Promise((reslove, reject) => {
      try {
        this.ws.send(JSON.stringify(data));
        reslove();
      } catch (e) {
        if (e ==
          'sendSocketMessage:fail WebSocket is not connected' ||
          e ==
          'sendSocketMessage:fail Error: SocketTask.readyState is not OPEN'
        ) {
          that.reconne();
        }
        reject(e);
      }
    })
  }

  onMessage(res) {
    const {type, data = {}} = JSON.parse(res.data);
    if (type === "chat" || type === 'reply') {
      this.vm.chat(data);
    }
    if (type == "to_transfer") {
      this.vm.toTransfer(data);
    }
    // this.vm.$emit(type, data);
  }

  onClose() {
    console.log('关闭连接')
    this.vm.$emit('close');
    //手动关闭不用重新连接
    if (this.handClse) {
      return;
    }
    clearInterval(this.timer);
    this.timer = null;
    this.connectStatus = false;
    this.connectLing = false;
    this.reconne();
  }

  onError(e) {
    console.log('连接发生错误', e)
    this.connectStatus = false;
    this.connectLing = false;
    this.reconne();
    this.vm.$emit("socket-error", e);
  }

  //断线重连
  reconne() {
    //没有token的情况下。不用重新连接
    if (this.token === null) {
      return;
    }
    if (this.reconnetime || this.connectStatus || this.errorNumber > MAX_ERROR_NUMBER) {
      return;
    }
    this.reconnetime = setInterval(() => {
      if (this.connectStatus) {
        return;
      }
      if (!this.connectLing) {
        this.connect()
        this.errorNumber++
      }
    }, this.reconnectTimer);
  }


}

export default Socket;