class WebSocketService {
  constructor() {
    this.socketTask = null
    this.isConnected = false
    this.heartbeatTimer = null
    this.reconnectTimer = null
    this.url = ""
    this.dispatchHandler = null // 统一分发处理器
  }

  connect(url) {
    if (this.isConnected) return
    this.url = url
    
	this.socketTask = uni.connectSocket({
		url: url, // 鉴权
		success: () => console.log("连接请求已发送")
	})
	
    // this.socketTask = uni.connectSocket({ url })
    console.log('WebSocketService', 'connect called, url:', url)

    // 注意：跨平台统一使用 socketTask 的事件监听
    if (this.socketTask) {
      this.socketTask.onOpen(() => {
        console.log("WebSocket 已连接")
        this.isConnected = true
        this.startHeartbeat()
      })

      this.socketTask.onMessage((res) => {
        console.log("📩 收到消息：", res.data)
        let msg
        try {
          msg = JSON.parse(res.data)
        } catch (e) {
          msg = res.data
        }

        // 统一分发
        if (this.dispatchHandler) {
          this.dispatchHandler(msg)
        } else {
          console.warn("未注册 dispatchHandler，消息未处理：", msg)
        }
      })

      this.socketTask.onClose(() => {
        console.log("❌ WebSocket 已关闭")
        this.isConnected = false
        this.reconnect()
      })

      this.socketTask.onError((err) => {
        console.error("⚠️ WebSocket 错误：", err)
        this.isConnected = false
        this.reconnect()
      })
    } else {
      console.error("WebSocketService: socketTask 获取失败，可能平台不支持")
    }
  }

  send(data) {
    if (this.isConnected && this.socketTask) {
      this.socketTask.send({
        data: typeof data === "string" ? data : JSON.stringify(data),
      })
      console.log('WebSocketService', 'send:', data)
    }
  }

  startHeartbeat() {
    console.log('WebSocketService', 'startHeartbeat')
    this.clearHeartbeat()
    this.heartbeatTimer = setInterval(() => {
      if (this.isConnected) {
        this.send("ping")
        console.log('WebSocketService', 'heartbeat ping sent')
      }
    }, 30000)
  }

  clearHeartbeat() {
    if (this.heartbeatTimer) {
      clearInterval(this.heartbeatTimer)
      this.heartbeatTimer = null
    }
  }

  reconnect() {
    if (this.reconnectTimer) return
    console.log("⏳ 5秒后尝试重连...")
    this.reconnectTimer = setTimeout(() => {
      this.connect(this.url)
      this.reconnectTimer = null
    }, 5000)
  }

  close() {
    this.clearHeartbeat()
    if (this.socketTask) {
      this.socketTask.close()
      this.socketTask = null
    }
    this.isConnected = false
    console.log('WebSocketService', 'close called')
  }

  setDispatchHandler(handler) {
    this.dispatchHandler = handler
  }
}

export default new WebSocketService()