import express from 'express';
import type { Request, Response, NextFunction } from 'express';
import fs from 'fs';
import path from 'path';

const app = express();
const PORT = process.env.PORT || 6100;

// 中间件：解析 JSON 请求体
app.use(express.json({ limit: '10mb' }));

// 中间件：解析 URL 编码的请求体
app.use(express.urlencoded({ extended: true, limit: '10mb' }));

// 中间件：解析原始请求体
app.use(express.raw({ type: '*/*', limit: '10mb' }));

// 自定义中间件：打印所有请求的详细信息
/* app.use((req: Request, res: Response, next: NextFunction) => {
  const timestamp = new Date().toISOString();

  console.log('\n' + '='.repeat(80));
  console.log(`[${timestamp}] 收到请求:`);
  console.log(`方法: ${req.method}`);
  console.log(`路径: ${req.path}`);
  console.log(`完整URL: ${req.originalUrl}`);
  console.log(`查询参数:`, req.query);
  console.log(`请求头:`, req.headers);

  // 打印请求体（如果存在）
  if (req.body) {
    if (Buffer.isBuffer(req.body)) {
      console.log(`请求体 (原始):`, req.body.toString());
    } else if (typeof req.body === 'object' && Object.keys(req.body).length > 0) {
      console.log(`请求体 (JSON):`, req.body);
    } else if (req.body) {
      console.log(`请求体:`, req.body);
    }
  }

  console.log(`客户端IP: ${req.ip}`);
  console.log(`User-Agent: ${req.get('User-Agent')}`);
  console.log('='.repeat(80));

  next();
}); */

// QQ机器人回显功能
app.post('/', async (req: Request, res: Response) => {
  // 检查是否是消息类型的请求
  if (!req.body || req.body.post_type != 'message') return
  const { target_id, raw_message, message_type, user_id } = req.body;

  console.log(`\n[QQ机器人] 收到${message_type}消息`);
  console.log(`发送者ID: ${user_id || target_id}`);
  console.log(`消息内容: ${raw_message}`);

  // Match Douyin URL
  // Like: https://v.douyin.com/YqgJL_phY_k/
  const douyinUrlPattern = /https?:\/\/v\.douyin\.com\/[a-zA-Z0-9_-]+/;
  const douyinMatch = raw_message.match(douyinUrlPattern);
  
  try {
    // 如果检测到抖音链接，调用解析API
    if (douyinMatch) {
      const douyinUrl = douyinMatch[0];
      console.log(`[抖音链接检测] 发现抖音链接: ${douyinUrl}`);

      // 调用抖音视频解析API
      const apiUrl = `http://localhost:6101/api/hybrid/video_data?url=${encodeURIComponent(douyinUrl)}`;
      console.log(`[抖音解析] 调用API: ${apiUrl}`);

      const apiResponse = await fetch(apiUrl, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        }
      });

      if (!apiResponse.ok)
        throw new Error(`抖音API调用失败: ${apiResponse.status} ${apiResponse.statusText}`);

      let vD: any = await apiResponse.json();

      if (!vD.data)
        throw new Error('抖音API返回数据格式错误');

      vD = vD.data;

      // 发送视频信息
      sendMsg(`[抖音下载] ${vD.author.nickname}: ${vD.caption}\n`, target_id);

      // 下载视频
      const downloadUrl = `http://localhost:6101/api/download?url=${encodeURIComponent(douyinUrl)}&prefix=true&with_watermark=false`;
      console.log(`[抖音下载] 调用下载API: ${downloadUrl}`);

      const downloadResponse = await fetch(downloadUrl);
      if (!downloadResponse.ok) {
        throw new Error(`视频下载失败: ${downloadResponse.status} ${downloadResponse.statusText}`);
      }

      // 创建下载目录
      const downloadDir = process.env.DOWNLOAD_DIR || path.join(__dirname, 'downloads');
      if (!fs.existsSync(downloadDir)) {
        fs.mkdirSync(downloadDir, { recursive: true });
      }

      // 生成文件名
      const timestamp = Date.now();
      // 清理文件名中的非法字符
      const cleanCaption = vD.caption.replace(/[<>:"/\\|?*]/g, '_').substring(0, 50);
      const fileName = `${cleanCaption}_${timestamp}.mp4`;
      const filePath = path.join(downloadDir, fileName);

      // 保存视频文件
      console.log(`[抖音下载] 保存视频到: ${filePath}`);
      const buffer = await downloadResponse.arrayBuffer();
      fs.writeFileSync(filePath, Buffer.from(buffer));

      // 发送视频消息
      console.log(`[抖音发送] 发送视频文件`);
      await sendVideoMsg(filePath, target_id);

    }
  } catch (error) {
    console.error(`[错误] 处理消息时发生错误:`, error);
    
    sendMsg(String(error), target_id);
  }

});

function sendMsg(msg: string, target_id: string) {
  const replyMessage = {
    user_id: String(target_id),
    message: [
      {
        type: "text",
        data: {
          text: msg
        }
      }
    ]
  }

  const replyUrl = `http://localhost:30000/send_private_msg`;

  return fetch(replyUrl, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(replyMessage)
  });
}

function sendVideoMsg(filePath: string, target_id: string) {
  const videoMessage = {
    user_id: String(target_id),
    message: [
      {
        type: "video",
        data: {
          file: `file://${filePath}`
        }
      }
    ]
  }

  const replyUrl = `http://localhost:30000/send_private_msg`;

  return fetch(replyUrl, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(videoMessage)
  });
}

app.use((error: any, req: Request, res: Response, next: NextFunction) => {
  const timestamp = new Date().toISOString();
  console.error(`\n[${timestamp}] 错误:`, error);

  res.status(500).json({
    success: false,
    message: '服务器内部错误',
    error: error.message
  });
});

// 启动服务器
app.listen(PORT, () => {
  console.log(`Server is running on http://localhost:${PORT}`);
  console.log(`With env:`, { DOWNLOAD_DIR: process.env.DOWNLOAD_DIR, PORT: process.env.PORT });
});