const { app, BrowserWindow, ipcMain, dialog, Tray, Menu, nativeImage } = require('electron');
const path = require('path');
const fs = require('fs');
const Store = require('electron-store');
const { v4: uuidv4 } = require('uuid');
const { WSClient } = require('@wecom/aibot-node-sdk');
const WebSocket = require('ws');

// 初始化配置存储
const store = new Store({
  name: 'config',
  defaults: {
    bots: [], // 多 Bot 配置 [{id, botId, secret, name, enabled}]
    openclaw: {
      url: 'ws://localhost:18789',
      token: '',
      enabled: true
    }
  }
});

let mainWindow;
let wecomConnections = new Map(); // botId -> WeComConnection 实例
let openclawConnection = null; // OpenClawConnection 实例
let messageState = new Map(); // msgId -> { streamId, accumulatedText, frame, botId }
let reqIdMap = new Map(); // chatId -> reqId (用于回复消息)

// 创建主窗口
function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1200,
    height: 800,
    webPreferences: {
      nodeIntegration: false,
      contextIsolation: true,
      preload: path.join(__dirname, 'preload.js')
    },
    icon: path.join(__dirname, '../resources/icon.png')
  });

  const isDev = process.env.NODE_ENV === 'development';
  if (isDev) {
    mainWindow.loadURL('http://localhost:3000');
    mainWindow.webContents.openDevTools();
  } else {
    mainWindow.loadFile(path.join(__dirname, '../renderer/build/index.html'));
  }

  mainWindow.on('closed', () => {
    mainWindow = null;
  });
}

// 创建系统托盘
function createTray() {
  const iconPath = path.join(__dirname, '../resources/icon.png');
  const trayIcon = nativeImage.createFromPath(iconPath).resize({ width: 16, height: 16 });
  const tray = new Tray(trayIcon);
  
  const contextMenu = Menu.buildFromTemplate([
    { label: '显示主窗口', click: () => mainWindow.show() },
    { label: '退出', click: () => app.quit() }
  ]);
  
  tray.setToolTip('WeCom OpenClaw Client');
  tray.setContextMenu(contextMenu);
  
  return tray;
}

// 生成唯一的请求 ID
function generateReqId(prefix = 'msg') {
  return `${prefix}_${uuidv4().substring(0, 8)}_${Date.now()}`;
}

// 企业微信 WebSocket 连接管理
class WeComConnection {
  constructor(botConfig, eventHandler) {
    this.botId = botConfig.botId;
    this.secret = botConfig.secret;
    this.accountId = botConfig.id || botConfig.botId;
    this.eventHandler = eventHandler;
    this.client = null;
    this.isConnected = false;
    this.reconnectAttempts = 0;
    this.maxReconnectAttempts = 100;
  }

  async connect() {
    try {
      console.log(`[WeCom] Connecting bot ${this.botId}...`);
      
      this.client = new WSClient({
        botId: this.botId,
        secret: this.secret,
        wsUrl: 'wss://openws.work.weixin.qq.com',
        logger: {
          debug: (msg, ...args) => console.log(`[WeCom:${this.botId}] DEBUG:`, msg, ...args),
          info: (msg, ...args) => console.log(`[WeCom:${this.botId}] INFO:`, msg, ...args),
          warn: (msg, ...args) => console.warn(`[WeCom:${this.botId}] WARN:`, msg, ...args),
          error: (msg, ...args) => console.error(`[WeCom:${this.botId}] ERROR:`, msg, ...args)
        },
        heartbeatInterval: 30000, // 30 秒心跳
        maxReconnectAttempts: this.maxReconnectAttempts
      });

      // 监听连接事件
      this.client.on('connected', () => {
        this.isConnected = true;
        this.reconnectAttempts = 0;
        console.log(`[WeCom:${this.botId}] Connected`);
        wecomConnections.set(this.botId, this); // 存储实例本身
        // 检查窗口是否存在
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('connected', { botId: this.botId });
        }
      });

      // 监听认证成功
      this.client.on('authenticated', () => {
        console.log(`[WeCom:${this.botId}] Authenticated`);
      });

      // 监听断开
      this.client.on('disconnected', (reason) => {
        this.isConnected = false;
        console.log(`[WeCom:${this.botId}] Disconnected: ${reason}`);
        // 检查窗口是否存在
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('disconnected', { botId: this.botId, reason });
        }
        this.scheduleReconnect();
      });

      // 监听错误
      this.client.on('error', (error) => {
        console.error(`[WeCom:${this.botId}] Error:`, error);
        // 检查窗口是否存在
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('error', { botId: this.botId, error: error.message });
        }
        
        // 认证失败时拒绝重连
        if (error.message.includes('Authentication failed')) {
          return;
        }
      });

      // 监听消息 - 核心：接收企业微信消息并转发到 OpenClaw
      this.client.on('message', async (frame) => {
        console.log(`[WeCom:${this.botId}] Received message:`, JSON.stringify(frame, null, 2));
        // 检查窗口是否存在
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('message', { botId: this.botId, frame });
        }
        
        // 将消息转发到 OpenClaw
        await this.forwardMessageToOpenClaw(frame);
      });

      // 连接
      await this.client.connect();
    } catch (error) {
      console.error(`[WeCom:${this.botId}] Connect error:`, error);
      this.eventHandler('error', { botId: this.botId, error: error.message });
      this.scheduleReconnect();
    }
  }

  // 转发消息到 OpenClaw
  async forwardMessageToOpenClaw(frame) {
    if (!openclawConnection || !openclawConnection.isConnected) {
      console.log('[WeCom] OpenClaw not connected, skipping forward');
      return;
    }

    const body = frame.body;
    const chatId = body.chatid || body.from.userid;
    const chatType = body.chattype === 'group' ? 'group' : 'direct';
    const messageId = body.msgid;
    const reqId = frame.headers.req_id;

    // 保存 reqId 用于后续回复
    reqIdMap.set(chatId, reqId);

    // 构建转发到 OpenClaw 的消息
    // 参考 /home/wecom 插件的消息处理逻辑
    const text = this.extractTextFromFrame(frame);
    const hasMedia = this.hasMediaInFrame(frame);

    // 构建 OpenClaw 消息格式
    const openclawMessage = {
      type: 'event',
      event: 'message.inbound',
      payload: {
        channel: 'wecom',
        accountId: this.accountId,
        message: {
          id: messageId,
          from: body.from.userid,
          chatId: chatId,
          chatType: chatType,
          text: text,
          hasMedia: hasMedia,
          timestamp: body.create_time || Date.now()
        },
        reqId: reqId,
        botId: this.botId
      }
    };

    // 发送到 OpenClaw
    openclawConnection.send(JSON.stringify(openclawMessage));
    console.log(`[Forward] WeCom -> OpenClaw: ${messageId}`);
  }

  // 从 frame 中提取文本
  extractTextFromFrame(frame) {
    const body = frame.body;
    let text = '';

    if (body.text?.content) {
      text = body.text.content;
    } else if (body.mixed?.msg_item) {
      // 图文混排
      for (const item of body.mixed.msg_item) {
        if (item.msgtype === 'text' && item.text?.content) {
          text += item.text.content + '\n';
        }
      }
    } else if (body.voice?.content) {
      // 语音转文字
      text = body.voice.content;
    }

    // 群聊中移除 @机器人 提及
    if (body.chattype === 'group') {
      text = text.replace(/@\S+/g, '').trim();
    }

    return text.trim();
  }

  // 检查是否有媒体
  hasMediaInFrame(frame) {
    const body = frame.body;
    return !!(body.image?.url || body.file?.url || 
      (body.mixed?.msg_item?.some(item => item.msgtype === 'image')));
  }

  scheduleReconnect() {
    if (this.reconnectAttempts >= this.maxReconnectAttempts) {
      console.error(`[WeCom:${this.botId}] Max reconnect attempts reached`);
      return;
    }

    this.reconnectAttempts++;
    const delay = Math.min(1000 * Math.pow(1.5, this.reconnectAttempts), 60000);
    console.log(`[WeCom:${this.botId}] Reconnecting in ${delay}ms (attempt ${this.reconnectAttempts})`);

    setTimeout(() => this.connect(), delay);
  }

  // 发送消息到企业微信
  async sendMessage(chatId, content, finish = true, streamId = null) {
    if (!this.client || !this.isConnected) {
      throw new Error('Not connected');
    }

    const actualStreamId = streamId || generateReqId('stream');
    const reqId = reqIdMap.get(chatId) || generateReqId('req');

    // 使用流式回复
    const response = {
      cmd: 'aibot_respond_msg',
      headers: {
        req_id: reqId
      },
      body: {
        msgtype: 'stream',
        stream: {
          id: actualStreamId,
          finish: finish,
          content: content
        }
      }
    };

    console.log(`[WeCom:${this.botId}] Sending message to ${chatId}:`, content.substring(0, 100));
    await this.client.send(response);
    
    return actualStreamId;
  }

  disconnect() {
    if (this.client) {
      this.client.close();
      this.isConnected = false;
      wecomConnections.delete(this.botId);
    }
  }
}

// OpenClaw Gateway WebSocket 连接
class OpenClawConnection {
  constructor(url, token, eventHandler) {
    // 清理 URL - 移除末尾斜杠
    this.url = url?.trim().replace(/\/+$/, '') || 'ws://localhost:18789';
    this.token = token;
    this.eventHandler = eventHandler;
    this.socket = null;
    this.isConnected = false;
    this.reconnectAttempts = 0;
    this.maxReconnectAttempts = 100;
    this.messageId = 0;
    this.protocolVersion = 3;
    this.deviceId = `wecome-client_${process.platform}_${uuidv4()}`;
  }

  async connect() {
    try {
      console.log('[OpenClaw] Connecting to', this.url);
      
      const isSecure = this.url.startsWith('wss://');
      console.log(`[OpenClaw] Using ${isSecure ? 'WSS (SSL)' : 'WS (non-SSL)'} connection`);
      
      // 创建 WebSocket 配置
      const wsOptions = {
        rejectUnauthorized: false,  // 允许自签名证书
        followRedirects: true
      };
      
      // 如果是 wss://，添加更多 SSL 选项
      if (isSecure) {
        wsOptions.tls = {
          rejectUnauthorized: false,
          minVersion: 'TLSv1.2'
        };
      }
      
      this.socket = new WebSocket(this.url, wsOptions);

      this.socket.on('open', () => {
        this.isConnected = true;
        this.reconnectAttempts = 0;
        const logMsg = '[OpenClaw] ✅ WebSocket 连接已建立 | 就绪状态：' + this.socket.readyState + ' (1=OPEN)';
        console.log(logMsg);
        
        // 检查窗口是否存在
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('connected');
          // 发送详细日志到界面
          mainWindow.webContents.send('openclaw-log', { type: 'info', message: logMsg });
        }
        
        // 主动发送 connect 请求
        const sendLog = '[OpenClaw] 📤 发送 connect 请求...';
        console.log(sendLog);
        if (mainWindow && !mainWindow.isDestroyed()) {
          mainWindow.webContents.send('openclaw-log', { type: 'info', message: sendLog });
        }
        this.sendConnect();
      });

      this.socket.on('message', (data) => {
        // 窗口已关闭时忽略消息
        if (!mainWindow || mainWindow.isDestroyed()) {
          return;
        }
        try {
          const messageStr = data.toString();
          const logMsg = '[OpenClaw] 📥 收到消息 (长度：' + messageStr.length + ' 字节) | 类型：' + messageStr.substring(0, 50);
          console.log(logMsg);
          mainWindow.webContents.send('openclaw-log', { type: 'info', message: logMsg });
          
          const message = JSON.parse(messageStr);
          
          // 处理响应
          if (message.type === 'res') {
            let errorDetail = '';
            if (!message.ok) {
              if (message.error) {
                errorDetail = typeof message.error === 'object' ? JSON.stringify(message.error) : String(message.error);
              }
              if (message.payload) {
                errorDetail += ' | payload: ' + JSON.stringify(message.payload);
              }
            }
            const resLog = '[OpenClaw] 响应：' + (message.ok ? '✅ 成功' : '❌ 失败') + (errorDetail ? ' | ' + errorDetail : '');
            console.log(resLog);
            mainWindow.webContents.send('openclaw-log', { type: message.ok ? 'success' : 'error', message: resLog });
          }
          
          // 处理 connect.challenge 质询
          if (message.type === 'event' && message.event === 'connect.challenge') {
            const challengeLog = '[OpenClaw] 🔐 收到 challenge 质询';
            console.log(challengeLog);
            mainWindow.webContents.send('openclaw-log', { type: 'info', message: challengeLog });
            this.sendConnect(message.payload?.nonce);
            return;
          }
          
          this.handleMessage(message);
        } catch (error) {
          const errorLog = '[OpenClaw] ❌ 解析错误：' + error.message;
          console.error(errorLog);
          mainWindow.webContents.send('openclaw-log', { type: 'error', message: errorLog });
        }
      });

      this.socket.on('close', (event) => {
        this.isConnected = false;
        const closeLog = '[OpenClaw] 🔴 连接已关闭 | 代码：' + event.code + ' | 原因：' + (event.reason || '无');
        console.log(closeLog);
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('disconnected');
          mainWindow.webContents.send('openclaw-log', { type: 'warning', message: closeLog });
        }
        this.scheduleReconnect();
      });

      this.socket.on('error', (error) => {
        const errorLog = '[OpenClaw] ❌ 错误：' + error.message;
        console.error(errorLog);
        if (mainWindow && !mainWindow.isDestroyed()) {
          this.eventHandler('error', { error: error.message });
          mainWindow.webContents.send('openclaw-log', { type: 'error', message: errorLog });
          if (error.message?.includes('WRONG_VERSION_NUMBER')) {
            mainWindow.webContents.send('openclaw-log', { type: 'error', message: '🔴 SSL/TLS 协议不匹配！请尝试改用 ws://（非加密）' });
          }
        }
      });

    } catch (error) {
      this.eventHandler('error', { error: error.message });
      this.scheduleReconnect();
    }
  }

  // 发送 connect 握手（响应 challenge）
  sendConnect(nonce = null) {
    const connectMessage = {
      type: 'req',
      id: this.nextId(),
      method: 'connect',
      params: {
        minProtocol: this.protocolVersion,
        maxProtocol: this.protocolVersion,
        client: {
          id: 'cli',  // 客户端标识：cli, cli-ui, macos-app 等,
          version: '1.0.0',
          platform: process.platform,
          mode: 'operator'
        },
        role: 'operator',
        scopes: ['operator.read', 'operator.write'],
        caps: [],
        commands: [],
        permissions: {},
        auth: this.token ? { token: this.token } : {},
        locale: 'zh-CN',
        userAgent: 'wecome-openclaw-client/1.0.0',
        device: {
          id: this.deviceId,
          publicKey: 'temp_' + require('crypto').randomBytes(16).toString('hex'),  // 不能为空
          signature: 'sig_' + require('crypto').randomBytes(16).toString('hex'),  // 不能为空
          signedAt: Date.now(),
          nonce: nonce || uuidv4()  // 使用服务器的 nonce 如果存在
        }
      }
    };

    console.log('[OpenClaw] Sending connect request:', JSON.stringify(connectMessage, null, 2));
    this.send(connectMessage);
  }

  // 处理来自 OpenClaw 的消息（回复到企业微信）
  handleMessage(message) {
    if (message.type === 'res' && message.ok) {
      // connect 响应
      if (message.payload?.type === 'hello-ok') {
        console.log('[OpenClaw] ✅ Handshake successful! Protocol version:', message.payload.protocol);
        console.log('[OpenClaw] Policy:', JSON.stringify(message.payload.policy));
        
        // 握手成功后才真正标记为已连接
        if (mainWindow && !mainWindow.isDestroyed()) {
          // 发送一个特殊的握手成功事件
          mainWindow.webContents.send('openclaw-event', { 
            eventType: 'handshake-ok', 
            data: { protocol: message.payload.protocol }
          });
        }
      }
    } else if (message.type === 'res' && !message.ok) {
      console.error('[OpenClaw] ❌ Connect failed:', message.error);
    } else if (message.type === 'event') {
      // 处理 OpenClaw 的事件
      if (message.event === 'message.outbound') {
        // OpenClaw 回复消息，需要转发到企业微信
        this.forwardMessageToWeCom(message);
      }
    }
  }

  // 转发 OpenClaw 回复到企业微信
  async forwardMessageToWeCom(message) {
    const payload = message.payload;
    const { channel, text, chatId, botId, streamId, finish } = payload;

    if (channel !== 'wecom') {
      return;
    }

    const wecomConn = wecomConnections.get(botId);
    if (!wecomConn) {
      console.error(`[OpenClaw] Bot ${botId} not connected`);
      return;
    }

    try {
      await wecomConn.sendMessage(chatId, text, finish, streamId);
      console.log(`[Forward] OpenClaw -> WeCom: ${chatId}`);
    } catch (error) {
      console.error('[Forward] Error:', error);
    }
  }

  send(message) {
    if (this.socket && this.socket.readyState === WebSocket.OPEN) {
      this.socket.send(JSON.stringify(message));
    }
  }

  nextId() {
    return `msg_${++this.messageId}_${Date.now()}`;
  }

  scheduleReconnect() {
    if (this.reconnectAttempts >= this.maxReconnectAttempts) {
      console.error('[OpenClaw] Max reconnect attempts reached');
      return;
    }

    this.reconnectAttempts++;
    const delay = Math.min(1000 * Math.pow(1.5, this.reconnectAttempts), 60000);
    console.log(`[OpenClaw] Reconnecting in ${delay}ms (attempt ${this.reconnectAttempts})`);

    setTimeout(() => this.connect(), delay);
  }

  disconnect() {
    if (this.socket) {
      this.socket.close();
      this.isConnected = false;
    }
  }
}

// IPC 处理器
function setupIpcHandlers() {
  // 获取配置
  ipcMain.handle('get-config', () => {
    return store.store;
  });

  // 保存配置
  ipcMain.handle('save-config', (event, config) => {
    store.set(config);
    return { success: true };
  });

  // 连接企业微信 Bot
  ipcMain.handle('connect-wecom', (event, botConfig) => {
    const { botId, secret, id } = botConfig;
    
    // 如果已存在，先断开
    if (wecomConnections.has(botId)) {
      wecomConnections.get(botId).disconnect();
    }

    const connection = new WeComConnection({ botId, secret, id }, (eventType, data) => {
      mainWindow.webContents.send('wecom-event', { eventType, data });
    });

    connection.connect();

    return { success: true };
  });

  // 断开企业微信 Bot
  ipcMain.handle('disconnect-wecom', (event, botId) => {
    const conn = wecomConnections.get(botId);
    if (conn) {
      conn.disconnect();
      wecomConnections.delete(botId);
    }
    return { success: true };
  });

  // 连接 OpenClaw
  ipcMain.handle('connect-openclaw', (event, config) => {
    const { url, token } = config;

    if (openclawConnection) {
      openclawConnection.disconnect();
    }

    openclawConnection = new OpenClawConnection(url, token, (eventType, data) => {
      mainWindow.webContents.send('openclaw-event', { eventType, data });
    });

    openclawConnection.connect();

    return { success: true };
  });

  // 断开 OpenClaw
  ipcMain.handle('disconnect-openclaw', () => {
    if (openclawConnection) {
      openclawConnection.disconnect();
      openclawConnection = null;
    }
    return { success: true };
  });

  // 获取连接状态
  ipcMain.handle('get-connection-status', () => {
    const wecomStatus = {};
    wecomConnections.forEach((conn, botId) => {
      wecomStatus[botId] = {
        connected: conn.isConnected,
        reconnectAttempts: conn.reconnectAttempts
      };
    });

    return {
      wecom: wecomStatus,
      openclaw: openclawConnection ? { connected: openclawConnection.isConnected } : { connected: false }
    };
  });

  // 测试消息
  ipcMain.handle('send-test-message', async (event, botId, chatId, text) => {
    const conn = wecomConnections.get(botId);
    if (!conn) {
      return { success: false, error: 'Bot not connected' };
    }

    try {
      await conn.sendMessage(chatId, text, true);
      return { success: true };
    } catch (error) {
      return { success: false, error: error.message };
    }
  });

  // 测试 OpenClaw 消息
  ipcMain.handle('send-test-openclaw-message', async (event, text) => {
    if (!openclawConnection || !openclawConnection.isConnected) {
      return { success: false, message: 'OpenClaw 未连接' };
    }

    try {
      // 构建测试消息
      const testMessage = {
        type: 'req',
        id: openclawConnection.nextId(),
        method: 'chat.send',
        params: {
          text: text,
          sessionKey: `test_${Date.now()}`,
          echo: true  // 要求回显
        }
      };

      console.log('[OpenClaw] Sending test message:', testMessage);
      openclawConnection.send(testMessage);

      return { 
        success: true, 
        message: `测试消息已发送："${text}"`,
        timestamp: new Date().toLocaleTimeString()
      };
    } catch (error) {
      return { success: false, message: `发送失败：${error.message}` };
    }
  });
}

// 应用生命周期
app.whenReady().then(() => {
  createWindow();
  createTray();
  setupIpcHandlers();

  // 自动加载配置并连接
  setTimeout(async () => {
    const config = store.store;
    
    // 连接 OpenClaw
    if (config.openclaw.enabled) {
      await ipcMain.emit('connect-openclaw', null, config.openclaw);
    }

    // 连接所有启用的 Bot
    for (const bot of config.bots) {
      if (bot.enabled) {
        await ipcMain.emit('connect-wecom', null, bot);
      }
    }
  }, 1000);

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow();
    }
  });
});

app.on('window-all-closed', () => {
  // 清理所有连接
  wecomConnections.forEach(conn => conn.disconnect());
  if (openclawConnection) {
    openclawConnection.disconnect();
  }

  if (process.platform !== 'darwin') {
    app.quit();
  }
});

app.on('quit', () => {
  // 清理所有连接
  console.log('[App] Quitting, cleaning up connections...');
  wecomConnections.forEach(conn => conn.disconnect());
  if (openclawConnection) {
    openclawConnection.disconnect();
  }
});

// 安全策略
app.commandLine.appendSwitch('disable-features', 'OutOfBlinkCors');