const express = require('express');
const router = express.Router();
const jwt = require('jsonwebtoken');
const rateLimit = require('express-rate-limit');
const User = require('../models/User');
const UserRole = require('../models/UserRole');
const Role = require('../models/Role');
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' });
    }

    // 从 User 表查 store 类型账号
    const user = await User.findOne({ username, type: 'store' }).select('+password');
    // 查关联的门店
    const Store = require('../models/Store');
    const store = await Store.findOne({ storeId: user.storeId });
    if (!user || user.status !== 'active') {
      return res.status(401).json({ success: false, message: '用户名或密码错误' });
    }

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

    const token = jwt.sign(
      { 
        id: user._id, 
        role: 'store', 
        type: 'store', 
        storeId: user.storeId || null,
        permissions: ['store:read', 'store:write', 'orders:read', 'orders:write', 'vehicles:read', 'vehicles:write', 'vehicleTypes:read'], 
        jti: Math.random().toString(36) 
      },
      process.env.JWT_SECRET,
      { expiresIn: process.env.JWT_EXPIRES_IN || '24h' }
    );

    res.json({
      success: true,
      data: { 
        id: store ? store._id : user._id,  // 门店的 MongoDB _id
        storeId: user.storeId,  // 门店编号如 STORE001
        username: user.username, 
        name: user.name, 
        role: 'store', 
        token 
      }
    });
  } catch (error) {
    res.status(500).json({ success: false, message: '服务器内部错误' });
  }
});

module.exports = router;