const express = require('express');
const router = express.Router();
const passport = require('../config/passport');
const jwt = require('jsonwebtoken');

// Google OAuth
router.get('/google', passport.authenticate('google', { scope: ['profile', 'email'] }));

router.get(
  '/google/callback',
  passport.authenticate('google', { failureRedirect: `${process.env.FRONTEND_URL}/login` }),
  (req, res) => {
    const token = jwt.sign(
      {
        id: req.user.id,
        username: req.user.username,
        user_type: req.user.user_type,
      },
      process.env.JWT_SECRET,
      { expiresIn: '7d' }
    );

    // 重定向到前端，并在URL中带上token
    res.redirect(`${process.env.FRONTEND_URL}/?token=${token}`);
  }
);

// GitHub OAuth
router.get('/github', passport.authenticate('github', { scope: ['user:email'] }));

router.get(
  '/github/callback',
  passport.authenticate('github', { failureRedirect: `${process.env.FRONTEND_URL}/login` }),
  (req, res) => {
    const token = jwt.sign(
      {
        id: req.user.id,
        username: req.user.username,
        user_type: req.user.user_type,
      },
      process.env.JWT_SECRET,
      { expiresIn: '7d' }
    );

    // 重定向到前端，并在URL中带上token
    res.redirect(`${process.env.FRONTEND_URL}/?token=${token}`);
  }
);

// 登出
router.post('/logout', (req, res) => {
  req.logout((err) => {
    if (err) {
      return res.status(500).json({ error: 'Failed to logout' });
    }
    res.json({ message: 'Logged out successfully' });
  });
});

// 检查认证状态
router.get('/status', (req, res) => {
  if (req.isAuthenticated()) {
    res.json({
      authenticated: true,
      user: {
        id: req.user.id,
        username: req.user.username,
        email: req.user.email,
        avatar_url: req.user.avatar_url,
        user_type: req.user.user_type,
      },
    });
  } else {
    res.json({ authenticated: false });
  }
});

module.exports = router;