package nl.voidcorp.dbot.music

import com.sedmelluq.discord.lavaplayer.player.AudioPlayer
import com.sedmelluq.discord.lavaplayer.player.event.AudioEventAdapter
import com.sedmelluq.discord.lavaplayer.track.AudioTrack
import com.sedmelluq.discord.lavaplayer.track.AudioTrackEndReason
import net.dv8tion.jda.core.EmbedBuilder
import net.dv8tion.jda.core.MessageBuilder
import net.dv8tion.jda.core.entities.Guild
import net.dv8tion.jda.core.entities.Member
import net.dv8tion.jda.core.entities.TextChannel
import net.dv8tion.jda.core.entities.VoiceChannel
import nl.voidcorp.dbot.commands.AudioPlayerSendHandler
import nl.voidcorp.dbot.commands.guildMusicMap
import nl.voidcorp.dbot.log
import java.time.LocalDateTime
import java.util.*
import kotlin.concurrent.thread


class TrackScheduler(val player: AudioPlayer, val guild: Guild, channel: VoiceChannel) : AudioEventAdapter() {
    val musicChannel: TextChannel
    init {
        player.addListener(this)

        val audio = guild.audioManager

        audio.sendingHandler = AudioPlayerSendHandler(player)
        audio.openAudioConnection(channel)

        musicChannel = guild.getTextChannelsByName("music", true).firstOrNull() ?: (guild.getTextChannelsByName("general", true).firstOrNull()
                ?: guild.defaultChannel!!)

    }

    private val q = ArrayDeque<AudioTrack>()
    /*override fun onEvent(event: AudioEvent) {
        if (event is TrackEndEvent) {

        }
    }*/

    override fun onTrackEnd(player: AudioPlayer, track: AudioTrack, endReason: AudioTrackEndReason) {
        if (q.isNotEmpty()) {
            player.playTrack(q.remove())
        } else {
            stopPlay(endReason)
            player.destroy()
        }
    }

    override fun onTrackStart(player: AudioPlayer, track: AudioTrack) {
        if (track.userData is Member)
            musicChannel.sendMessage(EmbedBuilder()
                    .setFooter("Requested by ${(track.userData as Member).effectiveName}", (track.userData as Member)
                            .user.effectiveAvatarUrl).setAuthor(track.info.author).setTitle(track.info.title, track.info.uri)
                    .setThumbnail("https://img.youtube.com/vi/${track.info.identifier}/hqdefault.jpg\n")
                    .setTimestamp(LocalDateTime.now()).build()).append("Now playing").queue()


    }

    fun queue(track: AudioTrack, member: Member) {
        track.userData = member
        if (q.isEmpty() && player.playingTrack == null) {
            log.info("Queue is empty, playing a track")
            player.playTrack(track)
        } else {
            log.info("Track Queue'd")
            q.addLast(track)
        }
    }

    fun insertFront(track: AudioTrack, member: Member) {
        track.userData = member
        if (q.isEmpty() && player.playingTrack == null) {
            log.info("Queue is empty, playing a track")
            player.playTrack(track)
        } else {
            log.info("Track inserted")
            q.addFirst(track)
        }
    }


    fun skip() {
        if (q.isNotEmpty()) {
            log.info("skipped Track!")
            player.playTrack(q.remove())
        } else {
            stopPlay(AudioTrackEndReason.REPLACED)
            player.destroy()
        }
    }

    fun isQueueEmpty() = q.isEmpty()


    fun stopPlay(endReason: AudioTrackEndReason) {

        if (endReason != AudioTrackEndReason.REPLACED) {
            guildMusicMap.remove(guild.idLong)
            musicChannel.sendMessage("Playlist has ended, leaving the voice channel!").queue()
            thread { guild.audioManager.closeAudioConnection() }
        }
    }

}