const jwt = require('jsonwebtoken');
const { JWT_SECRET } = require('./auth');

function optionalAuthenticateToken(req, res, next) {
  const authHeader = req.headers['authorization'];
  const token = authHeader && authHeader.split(' ')[1];

  if (!token) {
    req.user = null;
    return next();
  }

  jwt.verify(token, JWT_SECRET, (err, user) => {
    req.user = err ? null : user;
    next();
  });
}

module.exports = { optionalAuthenticateToken };