// 官方文档：https://docs.microsoft.com/zh-cn/aspnet/core/signalr/javascript-client?view=aspnetcore-6.0&viewFallbackFrom=aspnetcore-2.2&tabs=visual-studio
import * as signalR from '@microsoft/signalr'
import useSocketStore from '@/store/modules/socket'
import { getToken } from '@/utils/auth'
import useUserStore from '@/store/modules/user'
import { ElMessage } from 'element-plus'

export default {
  // signalR对象
  SR: {},
  // 失败连接重试次数
  failNum: 4,
  baseUrl: '',
  init(url) {
    const connection = new signalR.HubConnectionBuilder()
      .withUrl(url,  {
        headers: { Authorization: `Bearer ${getToken()}` }})
      .withAutomaticReconnect()//自动重新连接
      .configureLogging(signalR.LogLevel.Information)
      .build();
    this.SR = connection;
    // 断线重连
    connection.onclose(async () => {
      console.log('断开连接了')
      console.assert(connection.state === signalR.HubConnectionState.Disconnected);
      // 建议用户重新刷新浏览器
      await this.start();
    })

    connection.onreconnected(() => {
      console.log('断线重新连接成功')
    })
    this.receiveMsg(connection);
    // 启动
    this.start();
  },
  /**
   * 调用 this.signalR.start().then(async () => { await this.SR.invoke("method")})
   * @returns 
   */
async close(){
  var that = this;
  await this.SR.stop();
},


  async start() {
    var that = this;

    try {
      //使用async和await 或 promise的then 和catch 处理来自服务端的异常
      await this.SR.start();
      //console.assert(this.SR.state === signalR.HubConnectionState.Connected);
      console.log('signalR 连接成功了', this.SR.state);
      return true;
    } catch (error) {
      that.failNum--;
      console.log(`失败重试剩余次数${that.failNum}`, error)
      if (that.failNum > 0) {
        setTimeout(async () => {
          await this.SR.start()
        }, 5000);
      }
      return false;
    }
  },
  // 接收消息处理
  receiveMsg(connection) {
    connection.on("onlineNum", (data) => {
      const socketStore = useSocketStore();
      socketStore.setOnlineNum(data)
    });
    connection.on("forceOut", (msg) => {
      useUserStore().logOut().then(() => {
        ElMessage.error(msg);
        location.href = '/index';
      })
    });
    // connection.on("onlineNum", (data) => {
    //   store.dispatch("socket/changeOnlineNum", data);
    // });
    // // 接收欢迎语
    // connection.on("welcome", (data) => {
    //   console.log('welcome', data)
    //   Notification.info(data)
    // });
    // // 接收后台手动推送消息
    // connection.on("receiveNotice", (title, data) => {
    //   Notification({
    //     type: 'info',
    //     title: title,
    //     message: data,
    //     dangerouslyUseHTMLString: true,
    //     duration: 0
    //   })
    // })
    // // 接收系统通知/公告
    // connection.on("moreNotice", (data) => {
    //   if (data.code == 200) {
    //     store.dispatch("socket/getNoticeList", data.data);
    //   }
    // })
  }
}