const { createAudioResource, createAudioPlayer, joinVoiceChannel, NoSubscriberBehavior } = require('@discordjs/voice');
const { EmbedBuilder } = require('discord.js');
const ytdl = require('ytdl-core');
const { musicChannelId } = require('../config.json')

module.exports = async (client) => {
    
    const musicChannel = client.channels.cache.get(musicChannelId)

    const connection = joinVoiceChannel({
            channelId: musicChannel.id,
            guildId: musicChannel.guild.id,
            adapterCreator: musicChannel.guild.voiceAdapterCreator,
        });
        
        const player = createAudioPlayer({
            behaviors: {
                noSubscriber: NoSubscriberBehavior.Pause
            }
        })

    const trackList = ['Track 1', 'Track 2', 'Track 3', 'Track 4'];

    const songList = ['https://www.youtube.com/watch?v=Track1', 'https://www.youtube.com/watch?v=Track2', 'https://www.youtube.com/watch?v=Track3', 'https://www.youtube.com/watch?v=-Track4'];

    const artistList = ['Artist 1', 'Artist 2', 'Artist 3', 'Artist 4'];

    let trackPosition = 0;

    const playSongs = async () => {
    
        player.on('error', error => {
            const time = new Date().toLocaleString();
            console.error('Error at ' + time + ':', error);
        });
    
        let currentSong = songList[trackPosition];
        let currentTrack = trackList[trackPosition];
        let currentArtist = artistList[trackPosition];

        const videoId = currentSong.slice(32)

        const trackImage = `https://i.ytimg.com/vi/${videoId}/maxresdefault.jpg`;

        const stream = ytdl(currentSong, {
            filter: 'audioonly',
            fmt: "mp3",
            highWaterMark: 1 << 62,
            liveBuffer: 1 << 62,
            dlChunkSize: 0, //disabling chunking is recommended in discord bot
            bitrate: 128,
            quality: "lowestaudio"
        });

        const resource = createAudioResource(stream, { inlineVolume: true })
        resource.volume.setVolume(0.1);
        player.play(resource)

        const nowPlaying = new EmbedBuilder()
            .setColor('#4fbaf6')
            .setTitle(`**Currently playing:**`)
            .addFields({ name: 'Title:', value: currentTrack, inline: true })

            if (artistList.length >= 1) {
                nowPlaying.addFields({ name: 'Artist:', value: currentArtist, inline: true })
            }

            nowPlaying.addFields({ name: 'Link:', value: currentSong})

        const previousMessages = await musicChannel.messages.fetch();
        if (previousMessages) await musicChannel.bulkDelete(previousMessages).catch(console.error);

        await musicChannel.send({ content: trackImage });
        await musicChannel.send({ embeds: [nowPlaying] });

        await trackPosition++;

        if (trackPosition >= songList.length) trackPosition = 0;

    }

    connection.subscribe(player);

    playSongs();

    player.on('idle', playSongs);
    
};