import io from 'socket.io-client'
import { setBaseOption, BaseOption } from './storage'
import { type SocketOptions, SocketEvent } from './type'
import { SocketStatus, HskTerminatedCode } from './outputType'
import EventEmitter from '../eventemitter'
import { Logger } from '../Logger'

class HsSocket extends EventEmitter {
  private logger: Logger
  public socket?: typeof io.Socket
  /** 初始化 socket 需要的参数 */
  public socketOptions: SocketOptions
  /** 心跳延迟时间 */
  private heartBeatDelay: number
  /** 主动关闭链接时间 */
  private closeHeartBeatDelay: number
  /** 心跳检测定时器 */
  private heartBeatTimer: null | ReturnType<typeof setTimeout>
  /** 清空心跳检测定时器 */
  private closeHeartBeatTimer: null | ReturnType<typeof setTimeout>
  /** 超时次数 */
  // private timeOutCount: number
  /** 最大超时次数限制 */
  private imRetryCount: number
  /** 本次 socket 会话唯一 id */
  private sessionId: string

  constructor(socketOptions: SocketOptions) {
    super()

    /** 页面关闭时 关闭 socket */
    window.addEventListener('onunload', this.closeSocket)

    this.logger = new Logger(socketOptions.loggerLevel, 'HsSocket')
    this.socket = undefined
    this.heartBeatTimer = null
    this.closeHeartBeatTimer = null
    // this.timeOutCount = 0
    this.sessionId = ''

    this.socketOptions = socketOptions

    this.heartBeatDelay = socketOptions.imHeartTime * 1000 || 3000
    this.closeHeartBeatDelay = socketOptions.imHeartTime * 1000 || 3000
    this.imRetryCount = socketOptions.imRetryCount || 10
  }
  /** @public initSocket 初始化 Socket 连接 */
  public initSocket(): void {
    /** 如果有未断开的连接先断开 */
    this.closeSocket()

    // 设置状态为连接中
    this.emit(SocketEvent.SetSocketStatus, {
      status: SocketStatus.Connecting
    })
    /** https://socket.io/docs/v2/client-api/#iourl */
    this.socket = io(this.socketOptions.imWsServer, {
      transports: ['websocket'],
      reconnectionAttempts: this.imRetryCount,
      reconnectionDelay: this.heartBeatDelay,
      reconnectionDelayMax: this.heartBeatDelay + 1000,
      timeout: this.heartBeatDelay,
      reconnection: true
    })

    /** https://socket.io/docs/v2/client-api/#event-error */
    this.socket.on('error', (error: object) => {
      this.logger.error(`socket_error | ${JSON.stringify(error)}`)
    })

    /** https://socket.io/docs/v2/client-api/#event-connect_error-1 */
    this.socket.on('connect_error', (error: object) => {
      const errorData = `socket_connect_error | ${JSON.stringify(error)}`
      this.logger.warn(errorData)
    })

    this.socket.on('reconnecting', (res: string) => {
      this.logger.error(`socket_warn | socket_reconnecting | ${res}`)
      this.emit(SocketEvent.SetSocketStatus, {
        status: SocketStatus.ReTry
      })
    })

    this.socket.on('reconnect', (res: string) => {
      this.logger.error(`socket_warn | socket_reconnect | ${res}`)
      this.emit(SocketEvent.SetSocketStatus, {
        status: SocketStatus.Ready
      })
    })

    this.socket.on('reconnect_failed', (error: string) => {
      this.logger.error(`socket_warn | socket_reconnect_failed | ${error}`)
      this.emit(SocketEvent.SetSocketStatus, {
        status: SocketStatus.Terminated,
        code: HskTerminatedCode.SocketOnReconnectFailed,
        error: `${error}`
      })
    })

    /** https://socket.io/docs/v2/client-api/#event-connect */
    this.socket.on('connect', () => {
      this.emit(SocketEvent.SetSocketStatus, {
        status: SocketStatus.Connected
      })
      this.socketLogin()
    })

    /** https://socket.io/docs/v2/client-api/#event-disconnect */
    this.socket.on('disconnect', (reason: string) => {
      const errorMessage = `socket_disconnect | ${reason}`
      this.logger.warn(errorMessage)
    })

    /** 服务端下行事件 */
    this.socket.on('common_down_data', (e: string) => {
      // console.log(e, 3434343434)
      if (e && JSON.parse(e) && JSON.parse(e).data) {
        this.emit(SocketEvent.SocketDownEvent, {
          eventData: JSON.parse(JSON.parse(e).data)
        })
      }
    })

    /** 服务端下行指令 */
    this.socket.on('common_down_cmd', (e: string) => {
      const { clientSessionId } = JSON.parse(e)
      // console.log('dsdsdsdsdsds', clientSessionId)
      if (clientSessionId === this.sessionId) {
        this.logger.error(
          `socket status | ${SocketStatus.Terminated} | 坐席在其他页面重新初始化，本页面被踢出`
        )
        this.emit(SocketEvent.SetSocketStatus, {
          status: SocketStatus.Terminated,
          code: HskTerminatedCode.SocketRepeatLogin,
          error: '您已在其他页面签入，当前页面连接已断开'
        })
      }
    })
  }

  /** @private socketLogin 客户端上行登录事件 */
  private socketLogin() {
    const data = {
      // appCode: this.socketOptions.appCode || '1111',
      // token: this.socketOptions.token || '1111',
      userId: this.socketOptions.agent_id
    }
    this.socket &&
      this.socket.emit('login', data, (sessionId: string) => {
        // console.log(sessionId, '测试一下')
        this.emit(SocketEvent.SetSocketStatus, {
          status: SocketStatus.Ready
        })
        setBaseOption(BaseOption.TrackParams, { socket_session_id: sessionId })
        this.sessionId = sessionId
        this.startHeartbeat()
      })
  }

  /** @public closeSocket 关闭 socket 连接 */
  public closeSocket() {
    if (this.socket) {
      this.socket.io.opts.reconnection = false
      this.socket.close()
      // 清除之前的监听事件
      this.socket.removeAllListeners()
    }
    this.socket = undefined
    this.sessionId = ''
    if (this.heartBeatTimer) {
      window.clearTimeout(this.heartBeatTimer)
      this.heartBeatTimer = null
    }
    if (this.closeHeartBeatTimer) {
      window.clearTimeout(this.closeHeartBeatTimer)
      this.closeHeartBeatTimer = null
    }
  }

  /** @private startHeartbeat 开启心跳检测 */
  private startHeartbeat() {
    if (this.heartBeatTimer) {
      window.clearTimeout(this.heartBeatTimer)
      this.heartBeatTimer = null
    }
    if (this.closeHeartBeatTimer) {
      window.clearTimeout(this.closeHeartBeatTimer)
      this.closeHeartBeatTimer = null
    }
    this.socket && this.heartbeatEvent()
  }

  /** @private heartbeatEvent websocket心跳检测 */
  private heartbeatEvent() {
    this.heartBeatTimer = setTimeout(() => {
      this.socket && this.sendHeartbeat()
      /** 如果心跳检测一直没回应，则进行重连 */
      this.closeHeartBeatTimer = setTimeout(() => {
        this.logger.warn('socket_heart_beat | 心跳超时，即将重新连接')
        this.initSocket()
      }, this.closeHeartBeatDelay)
    }, this.heartBeatDelay)
  }

  /** @private sendHeartbeat 客户端上行心跳事件 */
  private sendHeartbeat() {
    this.socket &&
      this.socket.emit(
        'heartbeat',
        JSON.stringify({
          ...this.socketOptions
        }),
        () => {
          this.startHeartbeat()
        }
      )
  }
}
export default HsSocket