import { common, Context, wantAgent, Want } from '@kit.AbilityKit'
import { BusinessError } from '@kit.BasicServicesKit'
import { avSession } from '@kit.AVSessionKit'
import { image } from '@kit.ImageKit'
import { FileUtil, ImageUtil, PreferencesUtil, StrUtil } from '@pura/harmony-utils'
import {
  DeviceChangeReason,
  InterruptEvent,
  InterruptHintType,
  IjkMediaPlayer
} from '@ohos/ijkplayer'
import {
  ImplOnCompletionListener,
  ImplOnErrorListener,
  ImplOnPreparedListener,
  ImplOnSeekCompleteListener
} from '../common/IjkPlayerListenerImpls'
import { PlayStatus } from '../common/PlayStatus'
import { MusicCardActionConstants } from '../common/player/MusicCardActionConstants'
import { isPlaybackControlPlaying } from '../common/player/PlaybackControlStateHelper'
import { MusicCardManager, MusicCardPlaybackStateOptions } from '../common/player/MusicCardManager'
import { BackgroundTaskManager } from '../common/util/BackgroundTaskManager'
import Logger from '../common/util/Logger'
import { imagePathToPixelMap } from '../common/util/CommUtils'
import { setVideoUrlForSong } from '../common/util/RemotePlayerUtil'
import { MusicPlaybackController } from '../controller/MusicPlaybackController'
import { PlaybackRuntime } from '../controller/PlaybackCoordinator'
import { VideoItem } from '../viewmodel/VideoItem'
import { PlaybackSnapshotStore } from './PlaybackSnapshotStore'
import {
  BackgroundAudioControlDecision,
  BackgroundAudioControlKind,
  BackgroundAudioPersistedState,
  BackgroundAudioPlaybackHostHelper,
  BackgroundAudioRecoveredQueue
} from './BackgroundAudioPlaybackHostHelper'
import { PlaybackSnapshot, PlaybackSnapshotSong, resolvePlaybackSnapshotProgressValue } from './model/PlaybackSnapshot'

const TAG = 'BackgroundAudioHost'
const PLAYER_ID = 'audioIjkId'
const PROGRESS_INTERVAL_MS = 1000
const PLAYBACK_VERIFY_DELAY_MS = 200
const PLAYBACK_VERIFY_RETRY_DELAY_MS = 350

interface PlaybackSnapshotWriter {
  write(snapshot: PlaybackSnapshot): void
}

export class BackgroundAudioPlaybackHost {
  private static instance: BackgroundAudioPlaybackHost

  private context: common.Context | undefined = undefined
  private player: IjkMediaPlayer | undefined = undefined
  private queue: VideoItem[] = []
  private currentIndex: number = -1
  private currentSong: VideoItem | undefined = undefined
  private playType: number = 0
  private isPlaying: boolean = false
  private isPrepared: boolean = false
  private currentUrl: string = ''
  private progressTimerId: number = -1
  private playbackStartVerifyToken: number = 0
  private playbackSession: avSession.AVSession | undefined = undefined
  private creatingPlaybackSession: boolean = false
  private playbackSessionCallbacksRegistered: boolean = false
  private snapshotStore: PlaybackSnapshotWriter = new PlaybackSnapshotStore()
  private readonly runtime: PlaybackRuntime = {
    playQueue: async (queue: VideoItem[], startIndex: number, source: string, playType?: number): Promise<void> => {
      await this.playQueue(queue, startIndex, source, playType)
    },
    playOrPause: async (): Promise<void> => {
      await this.playOrPause()
    },
    playNext: async (): Promise<void> => {
      await this.playNext()
    },
    playPrevious: async (): Promise<void> => {
      await this.playPrevious()
    },
    setLoopMode: async (): Promise<void> => {
      await this.setLoopMode()
    },
    seekTo: async (value: string): Promise<void> => {
      await this.seekTo(value)
    }
  }

  public static getInstance(): BackgroundAudioPlaybackHost {
    if (!BackgroundAudioPlaybackHost.instance) {
      BackgroundAudioPlaybackHost.instance = new BackgroundAudioPlaybackHost()
    }
    return BackgroundAudioPlaybackHost.instance
  }

  public setContext(context: common.Context | undefined): void {
    this.context = context
    Logger.info(TAG, `[MusicCast] setContext contextReady=${context !== undefined}`)
  }

  public getRuntime(): PlaybackRuntime {
    return this.runtime
  }

  public async playQueue(queue: VideoItem[], startIndex: number, source: string, playType?: number): Promise<void> {
    if (queue.length <= 0) {
      Logger.warn(TAG, `[MusicCast] playQueue ignored empty queue source=${source}`)
      return
    }
    const safeIndex = Math.max(0, Math.min(startIndex, queue.length - 1))
    this.queue = [...queue]
    this.currentIndex = safeIndex
    this.currentSong = this.queue[safeIndex]
    if (playType !== undefined) {
      this.playType = playType
    }
    Logger.info(TAG,
      `[MusicCast] playQueue source=${source}, queueLength=${this.queue.length}, startIndex=${startIndex}, ` +
      `safeIndex=${safeIndex}, playType=${this.playType}`)
    this.persistCurrentQueue()
    await this.playIndex(safeIndex)
  }

  public async playOrPause(): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    await this.handleControlAction(MusicCardActionConstants.ACTION_PLAY_PAUSE)
  }

  public async playNext(): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    await this.handleControlAction(MusicCardActionConstants.ACTION_NEXT)
  }

  public async playPrevious(): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    await this.handleControlAction(MusicCardActionConstants.ACTION_PREVIOUS)
  }

  public async seekTo(value: string, _source?: string): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    await this.handleControlAction(MusicCardActionConstants.ACTION_SEEK_TO, value)
  }

  public async setLoopMode(): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    const nextMode = MusicPlaybackController.resolveNextLoopMode(this.playType)
    this.playType = nextMode.playType
    PreferencesUtil.putSync('musicPlayType', this.playType)
    this.persistCurrentQueue()
    this.syncHostStorage(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.syncPlaybackSessionState(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.persistPlaybackSnapshot(this.isPlaying)
    Logger.info(TAG, `[MusicCast] setLoopMode playType=${this.playType}, toast=${nextMode.toastText}`)
  }

  public syncCurrentSongFavoriteState(isFavorite: boolean): void {
    this.applyCurrentSongFavoriteState(isFavorite)
  }

  public getSpectrumData(): number[] {
    if (!this.player) {
      return []
    }
    return this.player.getSpectrumData()
  }

  public async handleControlAction(action: string, seekPositionMs: string = ''): Promise<boolean> {
    try {
      Logger.info(TAG,
        `[MusicCast] handleControlAction action=${action}, seek=${seekPositionMs}, queueLength=${this.queue.length}, ` +
        `currentIndex=${this.currentIndex}, isPlaying=${this.isPlaying}, isPrepared=${this.isPrepared}`)
      this.restorePersistedQueueIfNeeded()
      if (action === MusicCardActionConstants.ACTION_SEEK_TO) {
        const handled = this.seekToInternal(seekPositionMs)
        Logger.info(TAG, `[MusicCast] seek decision handled=${handled}, seek=${seekPositionMs}`)
        return handled
      }
      const decision = BackgroundAudioPlaybackHostHelper.resolveControlDecision(
        action,
        this.currentIndex,
        this.queue.length,
        this.isPlaying,
        this.playType
      )
      Logger.info(TAG,
        `[MusicCast] decision kind=${decision.kind}, targetIndex=${decision.targetIndex}, ` +
        `queueLength=${this.queue.length}, currentIndex=${this.currentIndex}, playType=${this.playType}`)
      return this.executeDecision(decision)
    } catch (error) {
      Logger.error(TAG, `[MusicCast] handleControlAction failed: ${(error as Error).message}`)
      return false
    }
  }

  private async executeDecision(decision: BackgroundAudioControlDecision): Promise<boolean> {
    if (decision.kind === BackgroundAudioControlKind.PAUSE) {
      this.pause()
      return true
    }
    if (decision.kind === BackgroundAudioControlKind.STOP) {
      this.stop()
      return true
    }
    if (decision.kind === BackgroundAudioControlKind.PLAY_INDEX) {
      if (!this.isPlaying && this.isPrepared && decision.targetIndex === this.currentIndex) {
        this.resume()
        return true
      }
      return this.playIndex(decision.targetIndex)
    }
    return false
  }

  private restorePersistedQueueIfNeeded(): void {
    if (this.queue.length > 0 && this.currentIndex >= 0 && this.currentIndex < this.queue.length) {
      Logger.info(TAG,
        `[MusicCast] skip restore because queue already ready queueLength=${this.queue.length}, currentIndex=${this.currentIndex}`)
      return
    }
    const persistedState: BackgroundAudioPersistedState = BackgroundAudioPlaybackHostHelper.readPersistedState(
      () => PreferencesUtil.getSync('LastMusicList', []) as VideoItem[],
      () => PreferencesUtil.getSync('LastMusicInfo', undefined) as VideoItem | undefined,
      () => PreferencesUtil.getNumberSync('LastPlayModeType', PreferencesUtil.getNumberSync('musicPlayType', 0))
    )
    if (persistedState.errorMessage) {
      Logger.error(TAG, `[MusicCast] restore persisted read failed: ${persistedState.errorMessage}`)
    }
    Logger.info(TAG,
      `[MusicCast] restore persisted queueLength=${persistedState.queue.length}, currentSong=${persistedState.currentSong?.name ?? ''}, ` +
      `path=${persistedState.currentSong?.filePath ?? ''}, playType=${persistedState.playType}`)
    const restored = BackgroundAudioPlaybackHostHelper.restorePersistedQueue(
      persistedState.queue,
      persistedState.currentSong,
      persistedState.playType
    )
    this.applyRecoveredQueue(restored)
  }

  private applyRecoveredQueue(restored: BackgroundAudioRecoveredQueue): void {
    this.queue = restored.queue
    this.currentIndex = restored.currentIndex
    this.currentSong = restored.currentSong
    this.playType = restored.playType
    Logger.info(TAG,
      `[MusicCast] applyRecoveredQueue queueLength=${this.queue.length}, currentIndex=${this.currentIndex}, ` +
      `currentSong=${this.currentSong?.name ?? ''}, path=${this.currentSong?.filePath ?? ''}, playType=${this.playType}`)
    this.syncHostStorage(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.persistPlaybackSnapshot(this.isPlaying)
  }

  private async playIndex(index: number): Promise<boolean> {
    if (index < 0 || index >= this.queue.length) {
      Logger.warn(TAG, `[MusicCast] playIndex ignored invalid index=${index}, queueLength=${this.queue.length}`)
      return false
    }
    this.currentIndex = index
    this.currentSong = this.queue[index]
    Logger.info(TAG,
      `[MusicCast] playIndex index=${index}, song=${this.currentSong?.name ?? ''}, path=${this.currentSong?.filePath ?? ''}, type=${this.currentSong?.type ?? -1}`)
    this.persistCurrentQueue()
    return this.prepareAndStartCurrentSong()
  }

  private async prepareAndStartCurrentSong(): Promise<boolean> {
    if (!this.currentSong) {
      Logger.warn(TAG, '[MusicCast] prepare skipped because currentSong missing')
      return false
    }
    if (!this.context) {
      Logger.warn(TAG, '[MusicCast] prepare skipped because context missing')
      return false
    }
    try {
      await this.ensurePlaybackSession()
      const player = this.ensurePlayer()
      this.playbackStartVerifyToken++
      this.isPrepared = false
      this.isPlaying = false
      this.currentUrl = await setVideoUrlForSong(this.currentSong, {
        context: this.context as Context,
        extractAudioInfo: false,
        extractCover: false,
        extractLyric: false
      })
      Logger.info(TAG,
        `[MusicCast] prepare resolved url=${this.currentUrl}, song=${this.currentSong.name}, path=${this.currentSong.filePath}`)

      player.reset()
      player.setAudioId(PLAYER_ID)
      player.native_setup()
      player.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, 'start-on-prepared', '1')
      player.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, 'packet-buffering', '0')
      player.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, 'soundtouch', '1')
      player.setVolume('1', '1')
      player.setDataSource(this.currentUrl)
      const headers = new Map<string, string>()
      headers.set('User-Agent', 'TTMusic-Widget/1.0')
      headers.set('Accept', '*/*')
      player.setDataSourceHeader(headers)
      void this.syncPlaybackSessionMetadata()
      player.prepareAsync()
      player.start()
      Logger.info(TAG, `[MusicCast] prepare issued start song=${this.currentSong.name}, playerId=${PLAYER_ID}`)
      this.syncHostStorage(PlayStatus.PAUSE)
      this.publishSnapshot(false)
      return true
    } catch (error) {
      Logger.error(TAG, `[MusicCast] prepare failed: ${(error as Error).message}`)
      this.isPrepared = false
      this.isPlaying = false
      this.syncHostStorage(PlayStatus.PAUSE)
      this.publishSnapshot(false)
      return false
    }
  }

  private ensurePlayer(): IjkMediaPlayer {
    if (this.player) {
      return this.player
    }
    const player = new IjkMediaPlayer()
    player.setAudioId(PLAYER_ID)
    player.native_setup()
    player.setOnPreparedListener(new ImplOnPreparedListener(() => {
      this.isPrepared = true
      player.start()
      this.isPlaying = player.isPlaying()
      Logger.info(TAG,
        `[MusicCast] onPrepared song=${this.currentSong?.name ?? ''}, path=${this.currentSong?.filePath ?? ''}, ` +
        `duration=${player.getDuration()}, isPlaying=${player.isPlaying()}, position=${player.getCurrentPosition()}, ` +
        `audioSessionId=${player.getAudioSessionId()}`)
      this.startProgressTimer()
      this.verifyPlaybackStarted(this.playbackStartVerifyToken, 'onPrepared')
      this.syncHostStorage(PlayStatus.PLAY)
      this.syncPlaybackSessionState(PlayStatus.PLAY)
      this.publishSnapshot(true)
    }))
    player.setOnCompletionListener(new ImplOnCompletionListener(() => {
      Logger.info(TAG,
        `[MusicCast] onCompletion currentIndex=${this.currentIndex}, queueLength=${this.queue.length}, playType=${this.playType}`)
      this.handleCompletion()
    }))
    player.setOnErrorListener(new ImplOnErrorListener((what: number, extra: number) => {
      Logger.error(TAG, `[MusicCast] player error what=${what}, extra=${extra}, url=${this.currentUrl}`)
      this.isPrepared = false
      this.isPlaying = false
      this.stopProgressTimer()
      this.syncHostStorage(PlayStatus.PAUSE)
      this.syncPlaybackSessionState(PlayStatus.PAUSE)
      this.publishSnapshot(false)
    }))
    player.setOnSeekCompleteListener(new ImplOnSeekCompleteListener(() => {
      Logger.info(TAG, `[MusicCast] onSeekComplete position=${player.getCurrentPosition()}`)
      this.publishProgress()
    }))
    player.on('audioInterrupt', (event: InterruptEvent) => {
      this.handleAudioInterrupt(player, event)
    })
    player.on('deviceChange', (event: InterruptEvent) => {
      Logger.info(TAG, `[MusicCast] deviceChange reason=${event.reason ?? DeviceChangeReason.REASON_UNKNOWN}`)
    })
    player.setMessageListener()
    this.player = player
    Logger.info(TAG, `[MusicCast] ensurePlayer created playerId=${PLAYER_ID}`)
    return player
  }

  private handleCompletion(): void {
    const completion = MusicPlaybackController.resolveCompletionAction(this.playType, this.currentIndex, this.queue.length)
    if (completion.action === 'replay_current') {
      void this.playIndex(this.currentIndex)
      return
    }
    if (completion.action === 'stop_current') {
      this.stop()
      return
    }
    const nextIndex = MusicPlaybackController.resolveNextQueueIndex(this.currentIndex, this.queue.length).nextIndex
    void this.playIndex(nextIndex)
  }

  private pause(): void {
    const player = this.player
    if (!player) {
      Logger.warn(TAG, '[MusicCast] pause ignored because player missing')
      return
    }
    player.pause()
    this.isPlaying = false
    this.stopProgressTimer()
    Logger.info(TAG, `[MusicCast] pause position=${player.getCurrentPosition()}, song=${this.currentSong?.name ?? ''}`)
    this.syncHostStorage(PlayStatus.PAUSE)
    this.syncPlaybackSessionState(PlayStatus.PAUSE)
    this.publishSnapshot(false)
  }

  private resume(): void {
    const player = this.player
    if (!player) {
      Logger.warn(TAG, '[MusicCast] resume ignored because player missing')
      return
    }
    player.start()
    this.isPlaying = true
    this.startProgressTimer()
    Logger.info(TAG, `[MusicCast] resume position=${player.getCurrentPosition()}, song=${this.currentSong?.name ?? ''}`)
    this.syncHostStorage(PlayStatus.PLAY)
    this.syncPlaybackSessionState(PlayStatus.PLAY)
    this.publishSnapshot(true)
  }

  private verifyPlaybackStarted(token: number, source: string): void {
    setTimeout(() => {
      if (token !== this.playbackStartVerifyToken || !this.player) {
        return
      }
      const player = this.player
      const isPlayingNow = player.isPlaying()
      const currentPosition = player.getCurrentPosition()
      Logger.info(TAG,
        `[MusicCast] verifyPlaybackStarted source=${source}, token=${token}, isPlaying=${isPlayingNow}, position=${currentPosition}`)
      if (isPlayingNow && currentPosition > 0) {
        this.isPlaying = true
        this.syncPlaybackSessionState(PlayStatus.PLAY)
        return
      }
      Logger.warn(TAG,
        `[MusicCast] verifyPlaybackStarted retry start source=${source}, token=${token}, ` +
        `isPlaying=${isPlayingNow}, position=${currentPosition}`)
      player.start()
      setTimeout(() => {
        if (token !== this.playbackStartVerifyToken || !this.player) {
          return
        }
        const retryPlaying = this.player.isPlaying()
        const retryPosition = this.player.getCurrentPosition()
        this.isPlaying = retryPlaying
        Logger.info(TAG,
          `[MusicCast] verifyPlaybackStarted afterRetry source=${source}, token=${token}, ` +
          `isPlaying=${retryPlaying}, position=${retryPosition}`)
        this.syncPlaybackSessionState(retryPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
      }, PLAYBACK_VERIFY_RETRY_DELAY_MS)
    }, PLAYBACK_VERIFY_DELAY_MS)
  }

  private stop(): void {
    const player = this.player
    const abilityContext = this.context as common.UIAbilityContext | undefined
    if (player) {
      Logger.info(TAG, `[MusicCast] stop position=${player.getCurrentPosition()}, song=${this.currentSong?.name ?? ''}`)
      player.stop()
    }
    this.isPlaying = false
    this.isPrepared = false
    this.stopProgressTimer()
    this.syncHostStorage(PlayStatus.INIT)
    this.syncPlaybackSessionState(PlayStatus.INIT)
    this.publishSnapshot(false)
    BackgroundTaskManager.stopContinuousTask(abilityContext)
  }

  private seekToInternal(value: string): boolean {
    const player = this.player
    if (!player || !this.currentSong || value === '') {
      Logger.warn(TAG,
        `[MusicCast] seek ignored playerReady=${player !== undefined}, songReady=${this.currentSong !== undefined}, value=${value}`)
      return false
    }
    Logger.info(TAG, `[MusicCast] seekTo value=${value}, song=${this.currentSong.name}`)
    player.seekTo(value)
    return true
  }

  private startProgressTimer(): void {
    this.stopProgressTimer()
    this.progressTimerId = setInterval(() => {
      this.publishProgress()
    }, PROGRESS_INTERVAL_MS)
  }

  private stopProgressTimer(): void {
    if (this.progressTimerId >= 0) {
      clearInterval(this.progressTimerId)
      this.progressTimerId = -1
    }
  }

  private publishProgress(): void {
    if (!this.player || !this.currentSong || !this.context) {
      return
    }
    const durationMs = this.resolveDurationMs()
    const positionMs = Math.max(0, this.player.getCurrentPosition())
    const progressValue = resolvePlaybackSnapshotProgressValue(positionMs, durationMs, 100)
    Logger.info(TAG,
      `[MusicCast] progress position=${positionMs}, duration=${durationMs}, isPlaying=${this.player.isPlaying()}, ` +
      `audioSessionId=${this.player.getAudioSessionId()}`)
    MusicCardManager.getInstance().notifyProgressTick(
      this.context,
      this.currentSong,
      this.isPlaying,
      positionMs,
      durationMs,
      this.currentSong.lyricContent,
      this.currentSong.pixelMapPath
    )
    this.syncPlaybackDisplayState(progressValue, positionMs, durationMs)
    this.syncPlaybackSessionState(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.persistPlaybackSnapshot(this.isPlaying)
  }

  private async ensurePlaybackSession(): Promise<void> {
    const abilityContext = this.context as common.UIAbilityContext | undefined
    if (!abilityContext) {
      Logger.warn(TAG, '[MusicCast] ensurePlaybackSession skipped because abilityContext missing')
      return
    }
    BackgroundTaskManager.startContinuousTask(abilityContext)
    if (this.playbackSession || this.creatingPlaybackSession) {
      return
    }
    this.creatingPlaybackSession = true
    try {
      const session = await avSession.createAVSession(abilityContext, 'music_card_background_audio', 'audio')
      this.playbackSession = session
      Logger.info(TAG, `[MusicCast] playbackSession created sessionId=${session.sessionId}`)
      try {
        await session.activate()
        Logger.info(TAG, '[MusicCast] playbackSession activated')
      } catch (error) {
        const err = error as BusinessError
        Logger.error(TAG, `[MusicCast] playbackSession activate failed code=${err.code}, message=${err.message}`)
      }
      await this.setPlaybackSessionLaunchAbility(abilityContext, session)
      this.registerPlaybackSessionCallbacks(session)
      await this.syncPlaybackSessionMetadata()
      this.syncPlaybackSessionState(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    } catch (error) {
      const err = error as BusinessError
      Logger.error(TAG, `[MusicCast] playbackSession create failed code=${err.code}, message=${err.message}`)
    } finally {
      this.creatingPlaybackSession = false
    }
  }

  private async setPlaybackSessionLaunchAbility(abilityContext: common.UIAbilityContext,
    session: avSession.AVSession): Promise<void> {
    try {
      const want = new Want()
      want.bundleName = abilityContext.abilityInfo.bundleName
      want.abilityName = abilityContext.abilityInfo.name
      const wantAgentInfo: wantAgent.WantAgentInfo = {
        wants: [want],
        operationType: wantAgent.OperationType.START_ABILITIES,
        requestCode: 0,
        wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
      }
      const agent = await wantAgent.getWantAgent(wantAgentInfo)
      await session.setLaunchAbility(agent)
      Logger.info(TAG, '[MusicCast] playbackSession launchAbility attached')
    } catch (error) {
      const err = error as BusinessError
      Logger.error(TAG, `[MusicCast] playbackSession launchAbility failed code=${err.code}, message=${err.message}`)
    }
  }

  private registerPlaybackSessionCallbacks(session: avSession.AVSession): void {
    if (this.playbackSessionCallbacksRegistered) {
      return
    }
    session.on('play', () => {
      void this.handlePlaybackSessionPlay()
    })
    session.on('pause', () => {
      this.handlePlaybackSessionPause()
    })
    session.on('stop', () => {
      this.handlePlaybackSessionStop()
    })
    session.on('playNext', () => {
      void this.playNext()
    })
    session.on('playPrevious', () => {
      void this.playPrevious()
    })
    session.on('seek', (time: number) => {
      void this.seekTo(`${time}`)
    })
    session.on('setLoopMode', (_mode: number) => {
      void this.setLoopMode()
    })
    session.on('toggleFavorite', (_assetId: string) => {
      this.toggleCurrentSongFavoriteState()
    })
    this.playbackSessionCallbacksRegistered = true
  }

  private async handlePlaybackSessionPlay(): Promise<void> {
    this.restorePersistedQueueIfNeeded()
    if (this.isPrepared && !this.isPlaying) {
      this.resume()
      return
    }
    if (this.currentIndex >= 0) {
      await this.playIndex(this.currentIndex)
      return
    }
    if (this.queue.length > 0) {
      await this.playIndex(0)
    }
  }

  private handlePlaybackSessionPause(): void {
    if (this.isPlaying) {
      this.pause()
    }
  }

  private handlePlaybackSessionStop(): void {
    this.stop()
  }

  private async syncPlaybackSessionMetadata(): Promise<void> {
    if (!this.playbackSession || !this.currentSong) {
      return
    }
    try {
      const mediaImage = await this.resolvePlaybackSessionMediaImage()
      let metadata: avSession.AVMetadata = {
        assetId: this.currentSong.filePath ?? this.currentSong.name ?? '',
        title: this.currentSong.name,
        artist: this.currentSong.artist,
        mediaImage: mediaImage,
        duration: this.resolveDurationMs()
      }
      await this.playbackSession.setAVMetadata(metadata)
      Logger.info(TAG,
        `[MusicCast] playbackSession metadata updated title=${this.currentSong.name}, duration=${metadata.duration ?? 0}`)
    } catch (error) {
      const err = error as BusinessError
      Logger.error(TAG, `[MusicCast] playbackSession metadata failed code=${err.code}, message=${err.message}`)
    }
  }

  private async resolvePlaybackSessionMediaImage(): Promise<image.PixelMap | string> {
    const coverPath = this.currentSong?.pixelMapPath ?? ''
    if (StrUtil.isNotEmpty(coverPath)) {
      if (coverPath.startsWith('http://') || coverPath.startsWith('https://')) {
        return coverPath
      }
      try {
        const localCoverPath = coverPath.startsWith('file://') ? FileUtil.getFilePath(coverPath) : coverPath
        return await imagePathToPixelMap(localCoverPath)
      } catch (error) {
        Logger.warn(TAG, `[MusicCast] cover pixelMap failed path=${coverPath}, message=${(error as Error).message}`)
      }
    }
    return await ImageUtil.getPixelMapFromMedia($r('app.media.alt'))
  }

  private syncPlaybackSessionState(status: number): void {
    if (!this.playbackSession || !this.player) {
      return
    }
    let state: avSession.PlaybackState = avSession.PlaybackState.PLAYBACK_STATE_INITIAL
    if (status === PlayStatus.PLAY) {
      state = avSession.PlaybackState.PLAYBACK_STATE_PLAY
    } else if (status === PlayStatus.PAUSE) {
      state = avSession.PlaybackState.PLAYBACK_STATE_PAUSE
    } else if (status === PlayStatus.INIT) {
      state = avSession.PlaybackState.PLAYBACK_STATE_STOP
    }
    let playbackState: avSession.AVPlaybackState = {
      state: state,
      loopMode: MusicPlaybackController.resolveAvSessionLoopMode(this.playType),
      isFavorite: this.currentSong?.isFav === 1,
      position: {
        elapsedTime: Math.max(0, this.player.getCurrentPosition()),
        updateTime: Date.now()
      }
    }
    this.playbackSession.setAVPlaybackState(playbackState).then(() => {
      Logger.info(TAG,
        `[MusicCast] playbackSession state=${state}, position=${playbackState.position?.elapsedTime ?? 0}`)
    }).catch((error: BusinessError) => {
      Logger.error(TAG, `[MusicCast] playbackSession state failed code=${error.code}, message=${error.message}`)
    })
  }

  private handleAudioInterrupt(player: IjkMediaPlayer, event: InterruptEvent): void {
    Logger.info(TAG,
      `[MusicCast] audioInterrupt forceType=${event.forceType ?? -1}, hintType=${event.hintType ?? -1}, ` +
      `isPlaying=${player.isPlaying()}, position=${player.getCurrentPosition()}`)
    switch (event.hintType) {
      case InterruptHintType.INTERRUPT_HINT_PAUSE:
      case InterruptHintType.INTERRUPT_HINT_STOP:
        this.isPlaying = false
        this.stopProgressTimer()
        this.syncHostStorage(PlayStatus.PAUSE)
        this.syncPlaybackSessionState(PlayStatus.PAUSE)
        this.publishSnapshot(false)
        break
      case InterruptHintType.INTERRUPT_HINT_RESUME:
        if (this.isPrepared && !player.isPlaying()) {
          player.start()
          this.isPlaying = true
          this.startProgressTimer()
          this.syncHostStorage(PlayStatus.PLAY)
          this.syncPlaybackSessionState(PlayStatus.PLAY)
          this.publishSnapshot(true)
        }
        break
      default:
        break
    }
  }

  private publishSnapshot(isPlaying: boolean): void {
    this.persistPlaybackSnapshot(isPlaying)
    if (!this.context) {
      return
    }
    const options = new MusicCardPlaybackStateOptions()
    options.currentSong = this.currentSong
    options.isPlaying = isPlaying
    options.positionMs = this.player ? Math.max(0, this.player.getCurrentPosition()) : 0
    options.durationMs = this.resolveDurationMs()
    options.lyricText = this.currentSong?.lyricContent
    options.coverPath = this.currentSong?.pixelMapPath
    MusicCardManager.getInstance().notifyPlaybackStateChanged(
      this.context,
      MusicCardManager.getInstance().buildSnapshotFromPlaybackState(options)
    )
  }

  private persistPlaybackSnapshot(isPlaying: boolean): void {
    const snapshot = this.buildPlaybackSnapshot(isPlaying)
    Logger.info(TAG,
      `[MiniState] persistPlaybackSnapshot song=${snapshot.currentSongName}, index=${snapshot.currentIndex}, ` +
      `isPlaying=${snapshot.isPlaying}, shouldResume=${snapshot.shouldResumeWhenActivated}, ` +
      `position=${snapshot.positionMs}, duration=${snapshot.durationMs}`)
    this.snapshotStore.write(snapshot)
  }

  private buildPlaybackSnapshot(isPlaying: boolean): PlaybackSnapshot {
    return {
      queue: this.queue.map((item: VideoItem): PlaybackSnapshotSong => {
        return {
          filePath: item.filePath,
          id: item.id,
          type: item.type,
          name: item.name,
          isFav: item.isFav,
          artist: item.artist,
          album: item.album,
          duration: item.duration,
          pixelMapPath: item.pixelMapPath,
          lyricContent: item.lyricContent,
          remote_rel_path: item.remote_rel_path,
          webdav_account_id: item.webdav_account_id
        }
      }),
      currentIndex: this.currentIndex,
      currentSongKey: this.currentSong?.filePath ?? '',
      currentSongName: this.currentSong?.name ?? '',
      currentArtist: this.currentSong?.artist,
      isPlaying,
      positionMs: this.player ? Math.max(0, this.player.getCurrentPosition()) : 0,
      durationMs: this.resolveDurationMs(),
      cover: this.currentSong?.pixelMapPath,
      playType: this.playType,
      playlistContext: 'host_runtime',
      updatedAt: Date.now(),
      shouldResumeWhenActivated: isPlaying || this.isPrepared
    }
  }

  private resolveDurationMs(): number {
    if (this.player) {
      const playerDuration = this.player.getDuration()
      if (playerDuration > 0) {
        return playerDuration
      }
    }
    return this.parseDurationText(this.currentSong?.duration)
  }

  private parseDurationText(durationText: string | undefined): number {
    if (!durationText || durationText === '') {
      return 0
    }
    const parts = durationText.split(':')
    if (parts.length < 2) {
      return 0
    }
    const numbers = parts.map((part: string): number => Number.parseInt(part, 10))
    if (numbers.some((value: number): boolean => Number.isNaN(value))) {
      return 0
    }
    if (numbers.length === 2) {
      return (numbers[0] * 60 + numbers[1]) * 1000
    }
    return (numbers[0] * 3600 + numbers[1] * 60 + numbers[2]) * 1000
  }

  private persistCurrentQueue(): void {
    PreferencesUtil.putSync('LastMusicInfo', this.currentSong)
    PreferencesUtil.putSync('LastMusicList', this.queue)
    PreferencesUtil.putSync('LastPlayModeType', this.playType)
    PreferencesUtil.putSync('musicPlayType', this.playType)
    Logger.info(TAG,
      `[MusicCast] persist queueLength=${this.queue.length}, currentIndex=${this.currentIndex}, ` +
      `currentSong=${this.currentSong?.name ?? ''}, path=${this.currentSong?.filePath ?? ''}, playType=${this.playType}`)
  }

  private syncHostStorage(status: PlayStatus): void {
    const isPlaying = isPlaybackControlPlaying(status)
    const positionMs = this.player ? Math.max(0, this.player.getCurrentPosition()) : 0
    const durationMs = this.resolveDurationMs()
    const progressValue = resolvePlaybackSnapshotProgressValue(positionMs, durationMs, 100)
    AppStorage.setOrCreate('CONTROL_PlayStatus', status)
    AppStorage.setOrCreate('isPlaying', isPlaying)
    AppStorage.setOrCreate('animationState', isPlaying ? AnimationStatus.Running : AnimationStatus.Paused)
    AppStorage.setOrCreate('musicPlayType', this.playType)
    AppStorage.setOrCreate('songList', this.queue)
    AppStorage.setOrCreate('currIndex', this.currentIndex)
    AppStorage.setOrCreate('currentSong', this.currentSong)
    this.syncPlaybackDisplayState(progressValue, positionMs, durationMs)
    AppStorage.setOrCreate('cover', this.currentSong?.pixelMapPath ?? '')
    AppStorage.setOrCreate('currentSongName', this.currentSong?.name ?? '')
    AppStorage.setOrCreate('currentSongArtist', this.currentSong?.artist ?? '')
    Logger.info(TAG,
      `[MusicCast] syncHostStorage status=${status}, currentSong=${this.currentSong?.name ?? ''}, ` +
      `cover=${this.currentSong?.pixelMapPath ?? ''}`)
  }

  private syncPlaybackDisplayState(progressValue: number, positionMs: number, durationMs: number): void {
    AppStorage.setOrCreate('progressValue', progressValue)
    AppStorage.setOrCreate('playbackPositionMs', positionMs)
    AppStorage.setOrCreate('playbackDurationMs', durationMs)
    AppStorage.setOrCreate('playbackIsFavorite', this.currentSong?.isFav === 1)
  }

  private toggleCurrentSongFavoriteState(): void {
    const nextFavorite = this.currentSong?.isFav !== 1
    this.applyCurrentSongFavoriteState(nextFavorite)
  }

  private applyCurrentSongFavoriteState(isFavorite: boolean): void {
    if (!this.currentSong) {
      return
    }
    const nextFavorite = isFavorite ? 1 : 0
    this.currentSong.isFav = nextFavorite
    if (this.currentIndex >= 0 && this.currentIndex < this.queue.length) {
      this.queue[this.currentIndex].isFav = nextFavorite
    }
    this.persistCurrentQueue()
    this.syncHostStorage(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.syncPlaybackSessionState(this.isPlaying ? PlayStatus.PLAY : PlayStatus.PAUSE)
    this.persistPlaybackSnapshot(this.isPlaying)
    Logger.info(TAG, `[MusicCast] favorite updated song=${this.currentSong.name}, isFavorite=${isFavorite}`)
  }
}