import { Request, Response } from 'express';
import bcrypt from 'bcryptjs';
import jwt from 'jsonwebtoken';
import { prisma } from '../config/database';
import { logger } from '../utils/logger';
import { createAuditLog } from '../utils/audit';

export const adminController = {
  // 管理员登录
  async login(req: Request, res: Response): Promise<void> {
    try {
      const { username, password } = req.body;

      // 验证管理员凭据
      const admin = await prisma.user.findFirst({
        where: {
          username,
          isAdmin: true
        }
      });

      if (!admin) {
        // 记录管理员登录失败审计日志
        await createAuditLog({
          userId: null,
          action: 'ADMIN_LOGIN_FAILED',
          resource: 'ADMIN',
          details: JSON.stringify({ username, reason: '管理员不存在' }),
          ipAddress: req.ip ?? null,
          userAgent: req.get('User-Agent') ?? null
        });
        
        res.status(401).json({
          success: false,
          message: '管理员凭据无效'
        });
        return;
      }

      // 验证密码
      const isValidPassword = await bcrypt.compare(password, admin.password);
      if (!isValidPassword) {
        // 记录管理员登录失败审计日志
        await createAuditLog({
          userId: admin.id,
          action: 'ADMIN_LOGIN_FAILED',
          resource: 'ADMIN',
          details: JSON.stringify({ username, reason: '密码错误' }),
          ipAddress: req.ip ?? null,
          userAgent: req.get('User-Agent') ?? null
        });
        
        res.status(401).json({
          success: false,
          message: '管理员凭据无效'
        });
        return;
      }

      // 生成JWT token
      const token = jwt.sign(
        { 
          userId: admin.id, 
          username: admin.username, 
          role: admin.isAdmin ? 'admin' : 'user'
        },
        "pandora",
        { expiresIn: '24h' }
      );

      // 创建审计日志
      await createAuditLog({
        userId: admin.id,
        action: 'ADMIN_LOGIN',
        resource: 'ADMIN',
        details: { username: admin.username },
        ipAddress: req.ip ?? null,
        userAgent: req.get('User-Agent') ?? null
      });

      res.json({
        success: true,
        message: '管理员登录成功',
        token,
        admin: {
          id: admin.id,
          username: admin.username,
          role: admin.isAdmin ? 'admin' : 'user'
        }
      });
    } catch (error) {
      logger.error('Admin login error:', error);
      res.status(500).json({
        success: false,
        message: '服务器内部错误'
      });
    }
  },

  // 获取统计数据
  async getStats(req: Request, res: Response): Promise<void> {
    try {
      // 获取用户总数
      const totalUsers = await prisma.user.count({
        where: { isAdmin: false }
      });

      // 获取账号总数
      const totalAccounts = await prisma.websiteAccount.count();

      // 获取今日访问数（基于会话）
      const today = new Date();
      today.setHours(0, 0, 0, 0);
      const todayVisits = await prisma.session.count({
        where: {
          createdAt: {
            gte: today
          }
        }
      });

      // 获取系统告警数（基于审计日志中的错误）
      const alerts = await prisma.auditLog.count({
        where: {
          action: { contains: 'ERROR' },
          createdAt: {
            gte: new Date(Date.now() - 24 * 60 * 60 * 1000) // 最近24小时
          }
        }
      });

      console.log('统计数据:', { totalUsers, totalAccounts, todayVisits, alerts });

      res.json({
        success: true,
        data: {
          totalUsers,
          totalAccounts,
          todayVisits,
          alerts
        }
      });
    } catch (error) {
      logger.error('Get stats error:', error);
      res.status(500).json({
        success: false,
        message: '获取统计数据失败'
      });
    }
  },

  // 获取最近活动
  async getRecentActivities(req: Request, res: Response): Promise<void> {
    try {
      const activities = await prisma.auditLog.findMany({
        take: 10,
        orderBy: {
          createdAt: 'desc'
        },
        include: {
          user: {
            select: {
              id: true,
              username: true
            }
          }
        }
      });

      const formattedActivities = activities.map((activity: any) => {
        let description = '';
        
        if (activity.action === 'USER_LOGIN_FAILED' || activity.action === 'ADMIN_LOGIN_FAILED') {
          // 解析失败原因
          let reason = '登录失败';
          let username = '未知用户';
          
          if (activity.details) {
            try {
              const details = JSON.parse(activity.details);
              reason = details.reason || '登录失败';
              username = details.username || '未知用户';
            } catch (e) {
              console.error('解析活动详情失败:', e);
            }
          }
          
          description = `${username} ${reason}`;
        } else if (activity.user) {
          description = `${activity.user.username} ${activity.action}`;
        } else {
          description = `系统 ${activity.action}`;
        }
        
        return {
          id: activity.id,
          description,
          time: activity.createdAt,
          details: activity.details,
          ipAddress: activity.ipAddress,
          userAgent: activity.userAgent,
          action: activity.action
        };
      });

      console.log('最近活动:', formattedActivities);

      res.json({
        success: true,
        data: {
          activities: formattedActivities
        }
      });
    } catch (error) {
      logger.error('Get recent activities error:', error);
      res.status(500).json({
        success: false,
        message: '获取最近活动失败'
      });
    }
  }
};