import { describe, it, expect } from '@ohos/hypium'
import { VideoItem } from '../../../main/ets/viewmodel/VideoItem'
import { insertSongToNextPlayQueue, QueueInsertStatus } from '../../../main/ets/common/util/PlayQueueHelper'

function createSong(name: string, filePath: string): VideoItem {
  const song = new VideoItem(name, filePath, filePath, 0, 0, '2026-03-01 00:00:00')
  song.fileName = `${name}.flac`
  return song
}

export default function playQueueHelperTest() {
  describe('PlayQueueHelperTest', () => {
    it('startPlaybackWhenQueueEmpty', 0, () => {
      const nextSong = createSong('Next', '/music/next.flac')

      const result = insertSongToNextPlayQueue([], '', -1, nextSong)

      expect(result.status).assertEqual(QueueInsertStatus.START_PLAY)
      expect(result.queue.map(item => item.filePath).join(',')).assertEqual('/music/next.flac')
      expect(result.currentIndex).assertEqual(0)
      expect(result.insertedIndex).assertEqual(0)
    })

    it('moveExistingSongBehindCurrentSong', 0, () => {
      const queue = [
        createSong('A', '/music/a.flac'),
        createSong('B', '/music/b.flac'),
        createSong('C', '/music/c.flac'),
        createSong('D', '/music/d.flac')
      ]

      const result = insertSongToNextPlayQueue(queue, '/music/c.flac', 2, queue[0])

      expect(result.status).assertEqual(QueueInsertStatus.INSERTED)
      expect(result.queue.map(item => item.filePath).join(',')).assertEqual('/music/b.flac,/music/c.flac,/music/a.flac,/music/d.flac')
      expect(result.currentIndex).assertEqual(1)
      expect(result.insertedIndex).assertEqual(2)
    })

    it('keepQueueUnchangedWhenSongAlreadyPlaying', 0, () => {
      const queue = [
        createSong('A', '/music/a.flac'),
        createSong('B', '/music/b.flac')
      ]

      const result = insertSongToNextPlayQueue(queue, '/music/b.flac', 1, queue[1])

      expect(result.status).assertEqual(QueueInsertStatus.ALREADY_PLAYING)
      expect(result.queue.map(item => item.filePath).join(',')).assertEqual('/music/a.flac,/music/b.flac')
      expect(result.currentIndex).assertEqual(1)
      expect(result.insertedIndex).assertEqual(1)
    })
  })
}