const jwt = require('jsonwebtoken');
const config = require('../config/jwt');

const auth = (req, res, next) => {
  try {
    const token = req.header('Authorization')?.replace('Bearer ', '');
    if (!token) {
      return res.status(401).json({ error: 'Authentication required' });
    }
    
    const decoded = jwt.verify(token, config.secret);
    req.userId = decoded.userId;
    next();
  } catch (error) {
    console.error('Auth error:', error);
    res.status(401).json({ error: 'Invalid token' });
  }
};

module.exports = auth;