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

/**
 * Generate JWT token for a user
 * @param {Object} user - User object
 * @returns {String} JWT token
 */
const generateToken = (user) => {
  return jwt.sign(
    { 
      id: user._id,
      role: user.role,
      email: user.email
    },
    env.JWT_SECRET,
    { expiresIn: env.JWT_EXPIRES_IN }
  );
};

/**
 * Verify JWT token
 * @param {String} token - JWT token
 * @returns {Object} Decoded token
 */
const verifyToken = (token) => {
  try {
    return jwt.verify(token, env.JWT_SECRET);
  } catch (error) {
    throw new Error('Invalid token');
  }
};

module.exports = {
  generateToken,
  verifyToken
};