const jwt = require('jsonwebtoken');
require("dotenv").config()

// Function to verify JWT token
exports.verifyToken = (token) => {
    try {
      const decoded = jwt.verify(token, process.env.SECRET_SAUCE);
      return decoded;
    } catch (error) {
      console.error(error);
      return null; // Return null if verification fails
    }
  };
  
  // Middleware for verifying JWT token
  exports.authenticateToken = (req, res, next) => {
    // Extract the token from the Authorization header
    const token = req.header('Authorization')?.replace('Bearer ', '');
  
    if (!token) {
      return res.status(401).json({ message: 'Unauthorized. Token not provided.' });
    }
  
    const decoded = exports.verifyToken(token);
  
    if (!decoded) {
      return res.status(401).json({ message: 'Unauthorized. Invalid token.' });
    }
  
    // Attach the decoded information to the request for future use
    req.user = decoded;
  
    // Proceed to the next middleware or route handler
    next();
  };

// Function to generate a JWT token
exports.generateToken = (userId, email) => {
  return jwt.sign({ userId, email }, process.env.SECRET_SAUCE, { expiresIn: '1h' });
};