const { verifyToken } = require('../util/jwt');
const { logger } = require('../util/logger');

function auth(req, res, next) {
  const authHeader = req.headers.authorization;

  if (!authHeader || !authHeader.startsWith('Bearer ')) {
    return res
      .status(401)
      .json({ error: 'missing or malformed authorization header' });
  }

  const token = authHeader.split(' ')[1];

  try {
    const payload = verifyToken(token);
    req.user = payload.customerNo;
    next();
  } catch (err) {
    logger.error(err, 'error verifying token');
    return res.status(401).json({ error: 'invalid or expired token' });
  }
}

module.exports = auth;