import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';

import { PondPermissionCache, PondPermissionContext } from './pond-permission-cache';

const CTX: PondPermissionContext = { grants: [], labelParents: {} };

describe('PondPermissionCache (issue #52)', () => {
  beforeEach(() => vi.useFakeTimers());
  afterEach(() => vi.useRealTimers());

  it('serves a stored context and drops it on invalidate', () => {
    const cache = new PondPermissionCache();
    cache.set('pond-1', CTX);
    expect(cache.get('pond-1')).toBe(CTX);

    cache.invalidate('pond-1');
    expect(cache.get('pond-1')).toBeUndefined();
  });

  it('invalidating one pond leaves others untouched', () => {
    const cache = new PondPermissionCache();
    cache.set('pond-1', CTX);
    cache.set('pond-2', CTX);
    cache.invalidate('pond-1');
    expect(cache.get('pond-2')).toBe(CTX);
  });

  it('expires entries after the TTL (multi-process staleness bound)', () => {
    const cache = new PondPermissionCache();
    cache.set('pond-1', CTX);
    vi.advanceTimersByTime(PondPermissionCache.TTL_MS - 1);
    expect(cache.get('pond-1')).toBe(CTX);
    vi.advanceTimersByTime(2);
    expect(cache.get('pond-1')).toBeUndefined();
  });
});