import { Router, Request, Response } from 'express';
import { PrismaClient } from '@prisma/client';
import { z } from 'zod';
import { authMiddleware } from '../middleware/auth';

const router = Router();
const prisma = new PrismaClient();

// ============================================
// VIP 卡密激活
// ============================================
const activateSchema = z.object({
  cardKey: z.string().regex(/^VIP\d+-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}$/),
});

router.post('/activate-vip', authMiddleware, async (req: Request, res: Response) => {
  try {
    const body = activateSchema.parse(req.body);
    
    // 查找卡密
    const card = await prisma.vipCard.findUnique({
      where: { cardKey: body.cardKey },
    });
    
    if (!card) {
      return res.status(400).json({
        success: false,
        message: '卡密不存在',
      });
    }
    
    if (card.status !== 'UNUSED') {
      return res.status(400).json({
        success: false,
        message: '卡密已被使用或已失效',
      });
    }
    
    // 获取用户当前 VIP 状态
    const user = await prisma.user.findUnique({
      where: { id: req.user!.userId },
      select: { isVip: true, vipExpireAt: true, vipLevel: true },
    });
    
    if (!user) {
      return res.status(404).json({
        success: false,
        message: '用户不存在',
      });
    }
    
    // 计算新的 VIP 过期时间
    let newExpireAt: Date;
    if (user.vipExpireAt && user.isVip && new Date() < user.vipExpireAt) {
      // 已是 VIP，延长时间
      newExpireAt = new Date(user.vipExpireAt.getTime() + card.days * 24 * 60 * 60 * 1000);
    } else {
      // 非 VIP，从现在开始计算
      newExpireAt = new Date(Date.now() + card.days * 24 * 60 * 60 * 1000);
    }
    
    // 更新用户 VIP 状态
    const updatedUser = await prisma.user.update({
      where: { id: req.user!.userId },
      data: {
        isVip: true,
        vipExpireAt: newExpireAt,
        vipLevel: Math.max(user.vipLevel, 1),
      },
    });
    
    // 更新卡密状态
    await prisma.vipCard.update({
      where: { id: card.id },
      data: {
        status: 'USED',
        usedBy: req.user!.userId,
        usedAt: new Date(),
      },
    });
    
    // 记录日志
    await prisma.userLog.create({
      data: {
        userId: req.user!.userId,
        action: 'VIP_ACTIVATE',
        targetId: card.id,
        ipAddress: req.ip,
      },
    });
    
    res.json({
      success: true,
      isVip: true,
      vipExpireAt: newExpireAt,
      vipLevel: updatedUser.vipLevel,
      message: `激活成功，VIP 有效期延长 ${card.days} 天`,
    });
  } catch (error) {
    if (error instanceof z.ZodError) {
      return res.status(400).json({
        success: false,
        message: '卡密格式无效',
      });
    }
    
    console.error('Activate VIP error:', error);
    res.status(500).json({ success: false, message: '激活失败' });
  }
});

export default router;