const express = require('express');
const router = express.Router();
const jwt = require('jsonwebtoken');
const rateLimit = require('express-rate-limit');
const Admin = require('../models/Admin');
const { comparePassword } = require('../utils/password');

// 登录限流
const loginLimiter = rateLimit({
  windowMs: 15 * 60 * 1000,
  max: 10,
  message: { success: false, message: '登录尝试过于频繁' }
});

router.post('/login', loginLimiter, async (req, res) => {
  try {
    const { username, password } = req.body;
    if (!username || !password) {
      return res.status(400).json({ success: false, message: '用户名和密码不能为空' });
    }

    const admin = await Admin.findOne({ username }).select('+password');
    if (!admin || admin.status !== 'active') {
      return res.status(401).json({ success: false, message: '用户名或密码错误' });
    }

    const isMatch = await comparePassword(password, admin.password);
    if (!isMatch) {
      return res.status(401).json({ success: false, message: '用户名或密码错误' });
    }

    const token = jwt.sign(
      { id: admin._id, role: admin.role, type: 'admin', jti: Math.random().toString(36) },
      process.env.JWT_SECRET,
      { expiresIn: process.env.JWT_EXPIRES_IN || '24h' }
    );

    res.json({
      success: true,
      data: { id: admin._id, username: admin.username, name: admin.name, role: admin.role, token }
    });
  } catch (error) {
    res.status(500).json({ success: false, message: '服务器内部错误' });
  }
});

module.exports = router;