// src/utils/websocket.js
let socket = null;
let reconnectAttempts = 0;
const maxReconnectAttempts = 5;
const reconnectInterval = 5000;
let messageCallback = null;

const initWebSocket = (token, callback) => {
  if (socket && socket.readyState === WebSocket.OPEN) {
    console.log('WebSocket 已连接，无需重复初始化');
    return;
  }

  if (!token) {
    console.error('未提供 token，无法建立 WebSocket 连接');
    callback('error', '未找到 token，无法建立 WebSocket 连接');
    return;
  }

  const wsUrl = `ws://192.168.1.2:5011/ws?token=${encodeURIComponent(token)}`;
  console.log('尝试连接 WebSocket:', wsUrl);

  try {
    socket = new WebSocket(wsUrl);
  } catch (error) {
    console.error('WebSocket 初始化失败:', error);
    callback('error', '无法初始化 WebSocket 连接');
    return;
  }

  messageCallback = callback;

  socket.onopen = () => {
    console.log('WebSocket 连接成功');
    reconnectAttempts = 0;
  };

  socket.onmessage = (event) => {
    console.log('WebSocket 收到原始消息:', event.data);
    if (messageCallback) {
      messageCallback('message', event.data);
    }
  };

  socket.onerror = (error) => {
    console.error('WebSocket 错误:', error);
    if (messageCallback) {
      messageCallback('error', 'WebSocket 连接错误');
    }
  };

  socket.onclose = (event) => {
    console.log('WebSocket 连接关闭，代码:', event.code, '原因:', event.reason);
    if (reconnectAttempts < maxReconnectAttempts) {
      setTimeout(() => {
        console.log(`尝试重连 (${reconnectAttempts + 1}/${maxReconnectAttempts})`);
        reconnectAttempts++;
        initWebSocket(token, callback);
      }, reconnectInterval);
    } else {
      if (messageCallback) {
        messageCallback('error', 'WebSocket 重连失败，请检查网络或服务器');
      }
    }
  };
};

const closeWebSocket = () => {
  if (socket) {
    socket.close(1000, '浏览器关闭，正常断开');
    socket = null;
    console.log('WebSocket 连接已关闭');
  }
};

window.addEventListener('beforeunload', () => {
  closeWebSocket();
});

export { initWebSocket, closeWebSocket };