import jwt from 'jsonwebtoken';

import crypto from 'crypto';

const JWT_SECRET = process.env.JWT_SECRET;

if (!JWT_SECRET) {

  throw new Error('JWT_SECRET is not set');

}

const JWT_EXPIRES_IN = '7d';

interface TokenPayload {

  userId: number;

  email: string;

}

export const generateToken = (userId: number, email: string): string => {

  const payload: TokenPayload = { userId, email };

  return jwt.sign(payload, JWT_SECRET, { expiresIn: JWT_EXPIRES_IN });

};

export const verifyToken = (token: string): TokenPayload => {

  return jwt.verify(token, JWT_SECRET, { algorithms: ['HS256'] }) as TokenPayload;

};

export const generatePasswordResetToken = (): string => {

  return crypto.randomBytes(32).toString('hex');

};

export const getPasswordResetExpiration = (): Date => {

  const expirationTime = new Date();

  expirationTime.setHours(expirationTime.getHours() + 1); // 1 hour from now

  return expirationTime;

};

export const isTokenExpired = (expirationDate: Date): boolean => {

  return new Date() > expirationDate;

};