import { createError } from '../../middleware/errorHandler';
import { signToken } from '../../utils/jwt';
import jwt from 'jsonwebtoken';

describe('createError', () => {
  it('creates an error with statusCode and code', () => {
    const err = createError('Something went wrong', 404, 'NOT_FOUND');
    expect(err.message).toBe('Something went wrong');
    expect(err.statusCode).toBe(404);
    expect(err.code).toBe('NOT_FOUND');
  });
});

describe('signToken', () => {
  it('returns a token and expiry date', () => {
    const { token, expiresAt } = signToken('test-user-id');
    expect(typeof token).toBe('string');
    expect(expiresAt).toBeInstanceOf(Date);
    expect(expiresAt.getTime()).toBeGreaterThan(Date.now());
  });

  it('encodes userId in the token', () => {
    const { token } = signToken('my-user-id');
    const decoded = jwt.decode(token) as { userId: string };
    expect(decoded.userId).toBe('my-user-id');
  });
});