import { expect, test } from '@playwright/test';
import { OTP_PERIOD_MS, nextUnusedCounter } from './keycloak-login';

// Pure check of the TOTP counter guard in loginMedewerker — no browser, no stack. Keycloak refuses
// a code it has already accepted (its otpPolicyCodeReusable defaults to false), so two logins as
// the same medewerker inside one 30-second window must not spend the same counter twice (#132).
test('a login never spends a TOTP counter this medewerker already used', () => {
  const now = 3 * OTP_PERIOD_MS + 1_000; // 1 second into counter 3

  expect(nextUnusedCounter(now, -1)).toBe(3); // nothing spent yet → the current counter
  expect(nextUnusedCounter(now, 3)).toBe(4); // the current counter is spent → the next one
  expect(nextUnusedCounter(now, 4)).toBe(5); // two logins already in this window → the one after
  expect(nextUnusedCounter(now + OTP_PERIOD_MS, 3)).toBe(4); // window moved on → current again
});