// tests/infra/scan_cycle.test.js
import { describe, it, expect, vi } from 'vitest';
import { runDeviceScanCycle } from '../../lib/infra/scan_cycle.js';

function fakeRepo() {
  return {
    calls: [],
    upsertScan: vi.fn(async r => r.length),
    markAbsent: vi.fn(async () => 1),
    prune: vi.fn(async () => 2)
  };
}

describe('runDeviceScanCycle', () => {
  it('scan→upsert→markAbsent→prune on a non-empty scan', async () => {
    const repo = fakeRepo();
    const scan = vi.fn(async () => [{ mac: 'aa:bb:cc:dd:ee:ff', ip: '1.2.3.4', vendor: 'x', randomized: false }]);
    const res = await runDeviceScanCycle({ scan, repo });
    expect(repo.upsertScan).toHaveBeenCalledOnce();
    expect(repo.markAbsent).toHaveBeenCalledWith(['aa:bb:cc:dd:ee:ff']);
    expect(repo.prune).toHaveBeenCalledOnce();
    expect(res).toEqual({ seen: 1, pruned: 2 });
  });

  it('skips upsert/prune when the scan returns nothing', async () => {
    const repo = fakeRepo();
    const res = await runDeviceScanCycle({ scan: async () => [], repo });
    expect(repo.upsertScan).not.toHaveBeenCalled();
    expect(repo.prune).not.toHaveBeenCalled();
    expect(res).toEqual({ seen: 0 });
  });
});