webssh/backend/routes/auth.js

const express = require('express');
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const db = require('../config/database');

const router = express.Router();

// 用户注册
router.post('/register', async (req, res) => {
  try {
    const { email, phone, password } = req.body;

    // 验证输入
    if (!email || !password) {
      return res.status(400).json({ error: '邮箱和密码是必填项' });
    }

    if (password.length < 6) {
      return res.status(400).json({ error: '密码长度至少6位' });
    }

    // 检查用户是否已存在
    const [existingUsers] = await db.pool.execute(
      'SELECT id FROM users WHERE email = ?',
      [email]
    );

    if (existingUsers.length > 0) {
      return res.status(400).json({ error: '该邮箱已被注册' });
    }

    // 加密密码
    const saltRounds = 12;
    const passwordHash = await bcrypt.hash(password, saltRounds);

    // 创建用户
    const [result] = await db.pool.execute(
      'INSERT INTO users (email, phone, password_hash) VALUES (?, ?, ?)',
      [email, phone || null, passwordHash]
    );

    // 生成JWT令牌
    const token = jwt.sign(
      { userId: result.insertId, email },
      process.env.JWT_SECRET || 'webssh-secret-key',
      { expiresIn: '7d' }
    );

    res.status(201).json({
      message: '注册成功',
      token,
      user: {
        id: result.insertId,
        email,
        phone
      }
    });
  } catch (error) {
    console.error('注册错误:', error);
    res.status(500).json({ error: '服务器内部错误' });
  }
});

// 用户登录
router.post('/login', async (req, res) => {
  try {
    const { email, password } = req.body;

    if (!email || !password) {
      return res.status(400).json({ error: '邮箱和密码是必填项' });
    }

    // 查找用户
    const [users] = await db.pool.execute(
      'SELECT * FROM users WHERE email = ?',
      [email]
    );

    if (users.length === 0) {
      return res.status(401).json({ error: '邮箱或密码错误' });
    }

    const user = users[0];

    // 检查用户是否激活
    if (user.is_active !== 1) {
      return res.status(403).json({ error: '账户已被禁用，请联系管理员' });
    }

    // 验证密码
    const isValidPassword = await bcrypt.compare(password, user.password_hash);
    if (!isValidPassword) {
      return res.status(401).json({ error: '邮箱或密码错误' });
    }

    // 更新最后登录时间
    await db.pool.execute(
      'UPDATE users SET last_login = CURRENT_TIMESTAMP WHERE id = ?',
      [user.id]
    );

    // 生成JWT令牌（包含管理员信息）
    const token = jwt.sign(
      { 
        userId: user.id, 
        email: user.email,
        isAdmin: user.is_admin === 1 
      },
      process.env.JWT_SECRET || 'webssh-secret-key',
      { expiresIn: '7d' }
    );

    res.json({
      message: '登录成功',
      token,
      user: {
        id: user.id,
        email: user.email,
        phone: user.phone,
        is_admin: user.is_admin === 1
      }
    });
  } catch (error) {
    console.error('登录错误:', error);
    res.status(500).json({ error: '服务器内部错误' });
  }
});

// 验证令牌中间件
const authenticateToken = (req, res, next) => {
  const authHeader = req.headers['authorization'];
  const token = authHeader && authHeader.split(' ')[1];

  if (!token) {
    return res.status(401).json({ error: '访问令牌缺失' });
  }

  jwt.verify(token, process.env.JWT_SECRET || 'webssh-secret-key', (err, user) => {
    if (err) {
      return res.status(403).json({ error: '令牌无效' });
    }
    req.user = user;
    next();
  });
};

// 获取当前用户信息
router.get('/me', authenticateToken, async (req, res) => {
  try {
    const [users] = await db.pool.execute(
      'SELECT id, email, phone, is_admin, is_active, last_login, created_at FROM users WHERE id = ?',
      [req.user.userId]
    );

    if (users.length === 0) {
      return res.status(404).json({ error: '用户不存在' });
    }

    const user = users[0];
    res.json({ 
      user: {
        id: user.id,
        email: user.email,
        phone: user.phone,
        is_admin: user.is_admin === 1,
        is_active: user.is_active === 1,
        last_login: user.last_login,
        created_at: user.created_at
      }
    });
  } catch (error) {
    console.error('获取用户信息错误:', error);
    res.status(500).json({ error: '服务器内部错误' });
  }
});

// 修改密码
router.put('/password', authenticateToken, async (req, res) => {
  try {
    const { currentPassword, newPassword } = req.body;

    if (!currentPassword || !newPassword) {
      return res.status(400).json({ error: '当前密码和新密码是必填项' });
    }

    if (newPassword.length < 6) {
      return res.status(400).json({ error: '新密码长度至少6位' });
    }

    // 获取用户当前密码
    const [users] = await db.pool.execute(
      'SELECT password_hash FROM users WHERE id = ?',
      [req.user.userId]
    );

    if (users.length === 0) {
      return res.status(404).json({ error: '用户不存在' });
    }

    // 验证当前密码
    const isValidPassword = await bcrypt.compare(currentPassword, users[0].password_hash);
    if (!isValidPassword) {
      return res.status(401).json({ error: '当前密码错误' });
    }

    // 加密新密码
    const saltRounds = 12;
    const newPasswordHash = await bcrypt.hash(newPassword, saltRounds);

    // 更新密码
    await db.pool.execute(
      'UPDATE users SET password_hash = ? WHERE id = ?',
      [newPasswordHash, req.user.userId]
    );

    res.json({ message: '密码修改成功' });
  } catch (error) {
    console.error('修改密码错误:', error);
    res.status(500).json({ error: '服务器内部错误' });
  }
});

module.exports = router;