// 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 { getToken } from '@/utils/auth'
import { ElNotification, ElMessage } from 'element-plus'
import useSocketStore from '@/store/modules/socket'
import { webNotify } from './index'
export default {
  // signalR对象
  SR: {},
  // 失败连接重试次数
  failNum: 4,
  baseUrl: '',
  init(url) {
    var socketUrl = window.location.origin + url
    const connection = new signalR.HubConnectionBuilder()
      .withUrl(socketUrl, { accessTokenFactory: () => getToken() })
      .withAutomaticReconnect() //自动重新连接
      .configureLogging(signalR.LogLevel.Warning)
      .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')
    })

    connection.onreconnecting(async () => {
      console.log('断线重新连接中... ')
      ElMessage({
        message: '与服务器通讯断开连接了，请稍后刷新浏览器尝试',
        type: 'warning',
        duration: 3000
      })
      await this.start()
    })

    this.receiveMsg(connection)
    // 启动
    // this.start();
  },
  /**
   * 调用 this.signalR.start().then(async () => { await this.SR.invoke("method")})
   * @returns
   */
  async start() {
    try {
      console.log('signalR-1', this.SR.state)
      //使用async和await 或 promise的then 和catch 处理来自服务端的异常
      if (this.SR.state === signalR.HubConnectionState.Disconnected) {
        await this.SR.start()
      }

      console.log('signalR-2', this.SR.state)
      return true
    } catch (error) {
      console.error(error)
      this.failNum--
      // console.log(`失败重试剩余次数${that.failNum}`, error)
      if (this.failNum > 0 && this.SR.state.Disconnected) {
        setTimeout(async () => {
          await this.start()
        }, 5000)
      }
      return false
    }
  },
  // 接收消息处理
  receiveMsg(connection) {
    connection.on('onlineNum', (data) => {
      useSocketStore().setOnlineUserNum(data)
    })
    // 接收欢迎语
    connection.on('welcome', (data) => {
      ElNotification.info(data)
    })
    // 接收后台手动推送消息
    connection.on('receiveNotice', (title, data) => {
      ElNotification({
        type: 'info',
        title: title,
        message: data,
        dangerouslyUseHTMLString: true,
        duration: 0
      })
      webNotify({ title: title, body: data })
    })
    // 接收系统通知/公告
    connection.on('moreNotice', (data) => {
      if (data.code == 200) {
        useSocketStore().setNoticeList(data.data)
      }
    })

    // 接收在线用户
    connection.on('onlineUser', (data) => {
      useSocketStore().setOnlineUsers(data)
    })

    // 接收聊天数据
    connection.on('receiveChat', (data) => {
      const title = `来自${data.userName}的消息通知`
      ElNotification({
        title: title,
        message: data.message,
        type: 'success',
        duration: 0
      })

      webNotify({ title: title, body: data.message })
    })
  }
}