const express = require('express');
const router = express.Router();
const viewHistoryStore = require('../store/viewHistoryStore');
const roomStore = require('../store/roomStore');

/**
 * 简单的认证中间件
 * 从 Authori-zation 头获取用户ID（实际项目应验证 JWT）
 */
function authMiddleware(req, res, next) {
  const token = req.headers['authori-zation'] || req.headers['authorization'];
  
  if (!token) {
    return res.status(401).json({
      code: 401,
      message: '请先登录'
    });
  }
  
  // 简单模拟：从 token 中提取用户ID
  // 实际项目应该验证 JWT 并解析用户信息
  // 这里假设 token 格式为 "Bearer userId" 或直接是 userId
  let userId;
  if (token.startsWith('Bearer ')) {
    userId = parseInt(token.substring(7), 10);
  } else {
    userId = parseInt(token, 10);
  }
  
  if (isNaN(userId)) {
    // 如果无法解析，默认使用用户ID 1
    userId = 1;
  }
  
  req.userId = userId;
  next();
}

/**
 * 记录观看历史
 * POST /api/front/activity/record-view
 */
router.post('/record-view', authMiddleware, (req, res) => {
  try {
    const { targetType, targetId, targetTitle, coverImage, streamerName, authorName, viewDuration } = req.body;
    
    if (!targetType || !targetId) {
      return res.status(400).json({ code: 400, message: '缺少必要参数' });
    }
    
    viewHistoryStore.record({
      userId: req.userId,
      targetType,
      targetId,
      targetTitle,
      coverImage,
      streamerName,
      authorName,
      viewDuration
    });
    
    res.json({ code: 200, message: '记录成功', data: { success: true } });
  } catch (error) {
    console.error('[ViewHistory] 记录观看历史失败:', error);
    res.status(500).json({ code: 500, message: '记录失败' });
  }
});

/**
 * 获取观看历史
 * GET /api/front/activity/view-history
 */
router.get('/view-history', authMiddleware, (req, res) => {
  try {
    const { type, page = 1, pageSize = 20 } = req.query;
    
    const result = viewHistoryStore.getUserHistory(
      req.userId,
      type,
      parseInt(page),
      parseInt(pageSize)
    );
    
    // 补充直播间的实时状态
    result.list = result.list.map(item => {
      if (item.targetType === 'room') {
        const room = roomStore.getById(item.targetId);
        if (room) {
          return {
            ...item,
            isLive: room.isLive,
            viewerCount: room.viewerCount
          };
        }
      }
      return item;
    });
    
    res.json({ code: 200, message: '获取成功', data: result });
  } catch (error) {
    console.error('[ViewHistory] 获取观看历史失败:', error);
    res.status(500).json({ code: 500, message: '获取失败' });
  }
});

/**
 * 清除观看历史
 * DELETE /api/front/activity/view-history
 */
router.delete('/view-history', authMiddleware, (req, res) => {
  try {
    const { type } = req.query;
    
    viewHistoryStore.clearUserHistory(req.userId, type);
    
    res.json({ code: 200, message: '清除成功', data: 'success' });
  } catch (error) {
    console.error('[ViewHistory] 清除观看历史失败:', error);
    res.status(500).json({ code: 500, message: '清除失败' });
  }
});

/**
 * 删除单条观看历史
 * DELETE /api/front/activity/view-history/:id
 */
router.delete('/view-history/:id', authMiddleware, (req, res) => {
  try {
    const { id } = req.params;
    
    const success = viewHistoryStore.deleteRecord(req.userId, parseInt(id));
    
    if (success) {
      res.json({ code: 200, message: '删除成功', data: 'success' });
    } else {
      res.status(404).json({ code: 404, message: '记录不存在' });
    }
  } catch (error) {
    console.error('[ViewHistory] 删除观看历史失败:', error);
    res.status(500).json({ code: 500, message: '删除失败' });
  }
});

module.exports = router;