const jwt = require('jsonwebtoken');
const User = require('../models/User');

const authGuard = async (req, res, next) => {
  const header = req.headers.authorization;
  if (!header || !header.startsWith('Bearer ')) {
    return res.status(401).json({ message: 'No token, authorisation denied' });
  }

  const token = header.split(' ')[1];
  try {
    const decoded = jwt.verify(token, process.env.JWT_SECRET);
    const user = await User.findById(decoded.id).select('-password -adminPin');
    if (!user || !user.active) {
      return res.status(401).json({ message: 'User not found or deactivated' });
    }
    req.user = user;
    next();
  } catch (err) {
    return res.status(401).json({ message: 'Token invalid or expired' });
  }
};

module.exports = authGuard;