subtracks/app/hooks/trackplayer.ts

import { useStore, useStoreDeep } from '@app/state/store'
import { getQueue, trackPlayerCommands } from '@app/state/trackplayer'
import TrackPlayer from 'react-native-track-player'

export const usePlay = () => {
  return () => trackPlayerCommands.enqueue(() => TrackPlayer.play())
}

export const usePause = () => {
  return () => trackPlayerCommands.enqueue(() => TrackPlayer.pause())
}

export const usePrevious = () => {
  return () =>
    trackPlayerCommands.enqueue(async () => {
      const [current] = await Promise.all([await TrackPlayer.getCurrentTrack(), await getQueue()])
      if (current > 0) {
        await TrackPlayer.skipToPrevious()
      } else {
        await TrackPlayer.seekTo(0)
      }
      await TrackPlayer.play()
    })
}

export const useNext = () => {
  return () =>
    trackPlayerCommands.enqueue(async () => {
      const [current, queue] = await Promise.all([await TrackPlayer.getCurrentTrack(), await getQueue()])
      if (current >= queue.length - 1) {
        await TrackPlayer.skip(0)
        await TrackPlayer.pause()
      } else {
        await TrackPlayer.skipToNext()
        await TrackPlayer.play()
      }
    })
}

export const useSkipTo = () => {
  return (track: number) =>
    trackPlayerCommands.enqueue(async () => {
      const queue = await getQueue()
      if (track < 0 || track >= queue.length) {
        return
      }
      await TrackPlayer.skip(track)
      await TrackPlayer.play()
    })
}

export const useSeekTo = () => {
  return (position: number) =>
    trackPlayerCommands.enqueue(async () => {
      await TrackPlayer.seekTo(position)
    })
}

export const useReset = (enqueue = true) => {
  const resetStore = useStore(store => store.resetTrackPlayerState)

  const reset = async () => {
    await TrackPlayer.reset()
    resetStore()
  }

  return enqueue ? () => trackPlayerCommands.enqueue(reset) : reset
}

export const useIsPlaying = (contextId: string | undefined, track: number) => {
  const queueContextId = useStore(store => store.queueContextId)
  const currentTrackIdx = useStore(store => store.currentTrackIdx)
  const shuffleOrder = useStoreDeep(store => store.shuffleOrder)

  if (contextId === undefined) {
    return track === currentTrackIdx
  }

  if (shuffleOrder) {
    const shuffledTrack = shuffleOrder.findIndex(i => i === track)
    track = shuffledTrack !== undefined ? shuffledTrack : -1
  }

  return contextId === queueContextId && track === currentTrackIdx
}