import { describe, it, expect } from 'vitest';
import { isAuthenticated, parseStoredSession, Session } from './session';

const session: Session = { bsn: '19012345601', naam: 'Test' };

describe('isAuthenticated', () => {
  it('narrows a present session to Session', () => {
    expect(isAuthenticated(session)).toBe(true);
  });

  it('reports no session as not authenticated', () => {
    expect(isAuthenticated(null)).toBe(false);
  });
});

describe('parseStoredSession', () => {
  it('returns null when nothing is stored', () => {
    expect(parseStoredSession(null)).toBeNull();
  });

  it('returns null for a non-JSON string', () => {
    expect(parseStoredSession('not json')).toBeNull();
  });

  it('returns null when the stored shape is wrong (no naam)', () => {
    expect(parseStoredSession(JSON.stringify({ bsn: '19012345601' }))).toBeNull();
  });

  it('G1: a stored bsn is never restored, even if present in the raw value', () => {
    const restored = parseStoredSession(JSON.stringify({ bsn: '19012345601', naam: 'Test' }));
    expect(restored).toEqual({ bsn: '', naam: 'Test' });
  });
});