import { describe, expect, test } from 'vitest';
import { suspectSourcesNextOffset } from './admin';
import type { AdminSuspectResponse, AdminSuspectTrack } from './types';

function track(id: string): AdminSuspectTrack {
  return {
    track_id: id,
    title: id,
    artist_id: 'ar',
    artist_name: 'Artist',
    album_id: 'al',
    album_title: 'Album',
    file_path: `/music/${id}.mp3`,
    duration_sec: 180,
    disc_number: null,
    track_number: null,
    markers: [],
    verdict: null,
    verdict_at: null,
    searched_at: null
  };
}

function page(offset: number, total: number): AdminSuspectResponse {
  return {
    total,
    limit: 50,
    offset,
    groups: [
      { directory: 'a', tracks: [track('1'), track('2')] },
      { directory: 'b', tracks: [track('3')] }
    ]
  };
}

// limit and total are in tracks, so the next offset must count tracks across
// groups, not the number of groups.
describe('suspectSourcesNextOffset', () => {
  test('counts tracks, not groups', () => {
    expect(suspectSourcesNextOffset(page(0, 10))).toBe(3);
  });

  test('stops at the total', () => {
    expect(suspectSourcesNextOffset(page(7, 10))).toBeUndefined();
  });
});