/*
 * Copyright (c) 2019 Hemanth Savarala.
 *
 * Licensed under the GNU General Public License v3
 *
 * This is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by
 *  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 */

package code.name.monkey.retromusic.helper

import android.annotation.TargetApi
import android.app.Activity
import android.content.*
import android.database.Cursor
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.os.IBinder
import android.provider.DocumentsContract
import android.widget.Toast
import androidx.core.content.ContextCompat
import code.name.monkey.retromusic.model.Song
import code.name.monkey.retromusic.repository.SongRepository
import code.name.monkey.retromusic.service.MusicService
import code.name.monkey.retromusic.util.PreferenceUtil
import org.koin.core.KoinComponent
import org.koin.core.inject
import java.io.File
import java.util.*

object MusicPlayerRemote : KoinComponent {
    val TAG: String = MusicPlayerRemote::class.java.simpleName
    private val mConnectionMap = WeakHashMap<Context, ServiceBinder>()
    var musicService: MusicService? = null

    private val songRepository by inject<SongRepository>()


    @JvmStatic
    val isPlaying: Boolean
        get() = musicService != null && musicService!!.isPlaying

    fun isPlaying(song: Song): Boolean {
        return if (!isPlaying) {
            false
        } else song.id == currentSong.id
    }

    val currentSong: Song
        get() = if (musicService != null) {
            musicService!!.currentSong
        } else Song.emptySong

    /**
     * Async
     */
    var position: Int
        get() = if (musicService != null) {
            musicService!!.position
        } else -1
        set(position) {
            if (musicService != null) {
                musicService!!.position = position
            }
        }

    @JvmStatic
    val playingQueue: List<Song>
        get() = if (musicService != null) {
            musicService?.playingQueue as List<Song>
        } else listOf<Song>()

    val songProgressMillis: Int
        get() = if (musicService != null) {
            musicService!!.songProgressMillis
        } else -1

    val songDurationMillis: Int
        get() = if (musicService != null) {
            musicService!!.songDurationMillis
        } else -1

    val repeatMode: Int
        get() = if (musicService != null) {
            musicService!!.repeatMode
        } else MusicService.REPEAT_MODE_NONE

    @JvmStatic
    val shuffleMode: Int
        get() = if (musicService != null) {
            musicService!!.shuffleMode
        } else MusicService.SHUFFLE_MODE_NONE

    val audioSessionId: Int
        get() = if (musicService != null) {
            musicService!!.audioSessionId
        } else -1

    val isServiceConnected: Boolean
        get() = musicService != null

    fun bindToService(context: Context, callback: ServiceConnection): ServiceToken? {

        var realActivity: Activity? = (context as Activity).parent
        if (realActivity == null) {
            realActivity = context
        }

        val contextWrapper = ContextWrapper(realActivity)
        val intent = Intent(contextWrapper, MusicService::class.java)
        try {
            contextWrapper.startService(intent)
        } catch (ignored: IllegalStateException) {
            ContextCompat.startForegroundService(context, intent)
        }
        val binder = ServiceBinder(callback)

        if (contextWrapper.bindService(
                Intent().setClass(contextWrapper, MusicService::class.java),
                binder,
                Context.BIND_AUTO_CREATE
            )
        ) {
            mConnectionMap[contextWrapper] = binder
            return ServiceToken(contextWrapper)
        }
        return null
    }

    fun unbindFromService(token: ServiceToken?) {
        if (token == null) {
            return
        }
        val mContextWrapper = token.mWrappedContext
        val mBinder = mConnectionMap.remove(mContextWrapper) ?: return
        mContextWrapper.unbindService(mBinder)
        if (mConnectionMap.isEmpty()) {
            musicService = null
        }
    }

    private fun getFilePathFromUri(context: Context, uri: Uri): String? {
        var cursor: Cursor? = null
        val column = "_data"
        val projection = arrayOf(column)

        try {
            cursor = context.contentResolver.query(uri, projection, null, null, null)
            if (cursor != null && cursor.moveToFirst()) {
                val columnIndex = cursor.getColumnIndexOrThrow(column)
                return cursor.getString(columnIndex)
            }
        } catch (e: Exception) {
            println(e.message)
        } finally {
            cursor?.close()
        }
        return null
    }

    fun getQueueDurationSongs(): Int {
        return musicService?.playingQueue?.size ?: -1
    }

    /**
     * Async
     */
    fun playSongAt(position: Int) {
        musicService?.playSongAt(position)
    }

    fun pauseSong() {
        musicService?.pause()
    }

    /**
     * Async
     */
    fun playNextSong() {
        musicService?.playNextSong(true)
    }

    /**
     * Async
     */
    fun playPreviousSong() {
        musicService?.playPreviousSong(true)
    }

    /**
     * Async
     */
    fun back() {
        musicService?.back(true)
    }

    fun resumePlaying() {
        musicService?.play()
    }

    /**
     * Async
     */
    @JvmStatic
    fun openQueue(queue: List<Song>, startPosition: Int, startPlaying: Boolean) {
        if (!tryToHandleOpenPlayingQueue(
                queue,
                startPosition,
                startPlaying
            ) && musicService != null
        ) {
            musicService?.openQueue(queue, startPosition, startPlaying)
            if (PreferenceUtil.isShuffleModeOn)
                setShuffleMode(MusicService.SHUFFLE_MODE_NONE)
        }
    }

    /**
     * Async
     */
    @JvmStatic
    fun openAndShuffleQueue(queue: List<Song>, startPlaying: Boolean) {
        var startPosition = 0
        if (queue.isNotEmpty()) {
            startPosition = Random().nextInt(queue.size)
        }

        if (!tryToHandleOpenPlayingQueue(
                queue,
                startPosition,
                startPlaying
            ) && musicService != null
        ) {
            openQueue(queue, startPosition, startPlaying)
            setShuffleMode(MusicService.SHUFFLE_MODE_SHUFFLE)
        }
    }

    private fun tryToHandleOpenPlayingQueue(
        queue: List<Song>,
        startPosition: Int,
        startPlaying: Boolean
    ): Boolean {
        if (playingQueue === queue) {
            if (startPlaying) {
                playSongAt(startPosition)
            } else {
                position = startPosition
            }
            return true
        }
        return false
    }

    fun getQueueDurationMillis(position: Int): Long {
        return if (musicService != null) {
            musicService!!.getQueueDurationMillis(position)
        } else -1
    }

    fun seekTo(millis: Int): Int {
        return if (musicService != null) {
            musicService!!.seek(millis)
        } else -1
    }

    fun cycleRepeatMode(): Boolean {
        if (musicService != null) {
            musicService?.cycleRepeatMode()
            return true
        }
        return false
    }

    fun toggleShuffleMode(): Boolean {
        if (musicService != null) {
            musicService?.toggleShuffle()
            return true
        }
        return false
    }

    fun setShuffleMode(shuffleMode: Int): Boolean {
        if (musicService != null) {
            musicService!!.shuffleMode = shuffleMode
            return true
        }
        return false
    }

    fun playNext(song: Song): Boolean {
        if (musicService != null) {
            if (playingQueue.size > 0) {
                musicService?.addSong(position + 1, song)
            } else {
                val queue = ArrayList<Song>()
                queue.add(song)
                openQueue(queue, 0, false)
            }
            Toast.makeText(
                musicService,
                musicService!!.resources.getString(code.name.monkey.retromusic.R.string.added_title_to_playing_queue),
                Toast.LENGTH_SHORT
            ).show()
            return true
        }
        return false
    }

    fun playNext(songs: List<Song>): Boolean {
        if (musicService != null) {
            if (playingQueue.size > 0) {
                musicService?.addSongs(position + 1, songs)
            } else {
                openQueue(songs, 0, false)
            }
            val toast =
                if (songs.size == 1) musicService!!.resources.getString(code.name.monkey.retromusic.R.string.added_title_to_playing_queue) else musicService!!.resources.getString(
                    code.name.monkey.retromusic.R.string.added_x_titles_to_playing_queue,
                    songs.size
                )
            Toast.makeText(musicService, toast, Toast.LENGTH_SHORT).show()
            return true
        }
        return false
    }

    fun enqueue(song: Song): Boolean {
        if (musicService != null) {
            if (playingQueue.size > 0) {
                musicService?.addSong(song)
            } else {
                val queue = ArrayList<Song>()
                queue.add(song)
                openQueue(queue, 0, false)
            }
            Toast.makeText(
                musicService,
                musicService!!.resources.getString(code.name.monkey.retromusic.R.string.added_title_to_playing_queue),
                Toast.LENGTH_SHORT
            ).show()
            return true
        }
        return false
    }

    fun enqueue(songs: List<Song>): Boolean {
        if (musicService != null) {
            if (playingQueue.size > 0) {
                musicService?.addSongs(songs)
            } else {
                openQueue(songs, 0, false)
            }
            val toast =
                if (songs.size == 1) musicService!!.resources.getString(code.name.monkey.retromusic.R.string.added_title_to_playing_queue) else musicService!!.resources.getString(
                    code.name.monkey.retromusic.R.string.added_x_titles_to_playing_queue,
                    songs.size
                )
            Toast.makeText(musicService, toast, Toast.LENGTH_SHORT).show()
            return true
        }
        return false
    }

    @JvmStatic
    fun removeFromQueue(song: Song): Boolean {
        if (musicService != null) {
            musicService!!.removeSong(song)
            return true
        }
        return false
    }

    fun removeFromQueue(position: Int): Boolean {
        if (musicService != null && position >= 0 && position < playingQueue.size) {
            musicService!!.removeSong(position)
            return true
        }
        return false
    }

    fun moveSong(from: Int, to: Int): Boolean {
        if (musicService != null && from >= 0 && to >= 0 && from < playingQueue.size && to < playingQueue.size) {
            musicService!!.moveSong(from, to)
            return true
        }
        return false
    }

    fun clearQueue(): Boolean {
        if (musicService != null) {
            musicService!!.clearQueue()
            return true
        }
        return false
    }

    @JvmStatic
    fun playFromUri(uri: Uri) {
        if (musicService != null) {

            var songs: List<Song>? = null
            if (uri.scheme != null && uri.authority != null) {
                if (uri.scheme == ContentResolver.SCHEME_CONTENT) {
                    var songId: String? = null
                    if (uri.authority == "com.android.providers.media.documents") {
                        songId = getSongIdFromMediaProvider(uri)
                    } else if (uri.authority == "media") {
                        songId = uri.lastPathSegment
                    }
                    if (songId != null) {
                        songs = songRepository.songs(songId)
                    }
                }
            }
            if (songs == null) {
                var songFile: File? = null
                if (uri.authority != null && uri.authority == "com.android.externalstorage.documents") {
                    songFile = File(
                        Environment.getExternalStorageDirectory(),
                        uri.path?.split(":".toRegex(), 2)?.get(1)
                    )
                }
                if (songFile == null) {
                    val path = getFilePathFromUri(musicService!!, uri)
                    if (path != null)
                        songFile = File(path)
                }
                if (songFile == null && uri.path != null) {
                    songFile = File(uri.path)
                }
                if (songFile != null) {
                    songs = songRepository.songsByFilePath(songFile.absolutePath)
                }
            }
            if (songs != null && songs.isNotEmpty()) {
                openQueue(songs, 0, true)
            } else {
                //TODO the file is not listed in the media store
                println("The file is not listed in the media store")
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.KITKAT)
    private fun getSongIdFromMediaProvider(uri: Uri): String {
        return DocumentsContract.getDocumentId(uri).split(":".toRegex())
            .dropLastWhile { it.isEmpty() }.toTypedArray()[1]
    }

    class ServiceBinder internal constructor(private val mCallback: ServiceConnection?) :
        ServiceConnection {

        override fun onServiceConnected(className: ComponentName, service: IBinder) {
            val binder = service as MusicService.MusicBinder
            musicService = binder.service
            mCallback?.onServiceConnected(className, service)
        }

        override fun onServiceDisconnected(className: ComponentName) {
            mCallback?.onServiceDisconnected(className)
            musicService = null
        }
    }

    class ServiceToken internal constructor(internal var mWrappedContext: ContextWrapper)
}