import { describe, it, expect } from 'vitest';
import { ZfsService } from '../src/services/zfs.service.js';

describe('ZfsService', () => {
  const zfs = new ZfsService();

  it('should list configured ZFS pools with health status', async () => {
    const pools = await zfs.listPools();
    expect(pools).toBeDefined();
    expect(pools.length).toBeGreaterThan(0);
    const tank = pools.find((p) => p.name === 'tank');
    expect(tank).toBeDefined();
    expect(tank?.health).toBe('ONLINE');
    expect(tank?.capacityPercent).toBeGreaterThanOrEqual(0);
  });

  it('should list datasets with proper mountpoint and compression', async () => {
    const datasets = await zfs.listDatasets('tank');
    expect(datasets.length).toBeGreaterThan(0);
    const photos = datasets.find((d) => d.name === 'tank/media/photos');
    expect(photos).toBeDefined();
    expect(photos?.mountpoint).toBe('/tank/media/photos');
    expect(photos?.compression).toBe('zstd');
  });

  it('should scan for unimported foreign pools without data loss', async () => {
    const unimported = await zfs.scanUnimportedPools();
    expect(unimported).toBeDefined();
    expect(Array.isArray(unimported)).toBe(true);
  });

  it('should safely import a foreign pool', async () => {
    const res = await zfs.importPool({ poolName: 'truenas_pool', force: true, noMount: true });
    expect(res.success).toBe(true);
    const pools = await zfs.listPools();
    const imported = pools.find((p) => p.name === 'truenas_pool');
    expect(imported).toBeDefined();
  });

  it('should create and rollback snapshots', async () => {
    const snapTag = `test-${Date.now()}`;
    const createRes = await zfs.createSnapshot('tank/media/photos', snapTag);
    expect(createRes.success).toBe(true);

    const snapshots = await zfs.listSnapshots('tank/media/photos');
    const created = snapshots.find((s) => s.snapshotTag === snapTag);
    expect(created).toBeDefined();

    const rollbackRes = await zfs.rollbackSnapshot(`tank/media/photos@${snapTag}`);
    expect(rollbackRes.success).toBe(true);
  });
});