const {createAudioPlayer, createAudioResource, joinVoiceChannel, getVoiceConnection} = require("@discordjs/voice")
const {dir} = require("../index")
const { AudioPlayerStatus } = require("@discordjs/voice")
const YTDlpWrap = require("yt-dlp-wrap").default

const ytDlp = new YTDlpWrap(`${dir}/yt-dlp`)

const players = {}

module.exports.commands = [
    {
        name: "play",
        description: "Joins your VC and plays music by youtube link.",
        arguments: ["link", false], // If it's not an OBJECT type, you provide it like that lol.
        run: async (ctx, link, loop) => {
            // Getting the guild member to get their voice client
            const author = ctx.author
            const member = await ctx.guild.members.fetch(author)

            // Initiating the channel variable (undefined)
            let channel;

            // Checking if the member is in a voice chat
            if (member.voice) {
                channel = member.voice.channel
            }
            
            // Returns if the user is not in vc or the bot is already in one
            if (!channel) {
                return ctx.reply("You are not in a VC right now.")
            } else if (ctx.guild.members.me.voice.channel && ctx.guild.members.me.voice.channel.id !== channel.id) {
                return ctx.reply("Already in a vc.")
            }

            let connection;

            // Checking if the bot is already in the vc
            if (!ctx.guild.members.me.voice.channel) {
                // Connecting to the voice channel
                connection = joinVoiceChannel({
                    channelId: channel.id, // Jetbrains is very angry over this for no reason?
                    guildId: channel.guild.id, // Or maybe this, it shows String instead of Snowflake.
                    adapterCreator: channel.guild.voiceAdapterCreator,
                })
            } else {
                // Getting an existing connection
                connection = getVoiceConnection(ctx.guild.id)
            }

            const reply = await ctx.reply("Loading music data.")

            // Running yt-dlp (getting music title)
            const metadata = await ytDlp.getVideoInfo(link);

            await reply.edit(`Downloading ${metadata.title}`)

            // Running yt-dlp (downloading music)
            ytDlp.exec([
                // Arguments to run yt-dlp with
                link,
                '-f',
                'best',
                '-o',
                `${dir}/music/${metadata.title}.mp3`,
                '--extract-audio',
                '--audio-format',
                'mp3'
            ]).on('close', () => {
                reply.edit(`Playing ${metadata.title}`)

                // Stopping old audio player
                if (players[ctx.guild.id]) {
                    players[ctx.guild.id].stop()
                }

                // Checking if the bot is still in the VC and if it's the same VC.
                if (!ctx.guild.members.me.voice || (ctx.guild.members.me.voice && !ctx.guild.members.me.voice.channel)||
                    (ctx.guild.members.me.voice && ctx.guild.members.me.voice.channel &&
                        ctx.guild.members.me.voice.channel.id !== channel.id)) {
                    return reply.edit("Not in a VC anymore, not playing.")
                }

                // Connecting audio player
                const player = createAudioPlayer()

                // Setting the global player to this
                players[ctx.guild.id] = player
                
                const resource = createAudioResource(`${dir}/music/${metadata.title}.mp3`)

                // Playing the music with the player
                player.play(resource)

                // Subscribing the connection to the player
                connection.subscribe(player)

                // Make it play again and again if it's looping
                if (loop) {
                    player.on("stateChange", (oldState, newState) => {
                        if (newState.status === AudioPlayerStatus.Idle && players[ctx.guild.id] !== undefined) {
                            // We have to create a new resource every time
                            const resource = createAudioResource(`${dir}/music/${metadata.title}.mp3`)

                            // Playing the music with the player
                            player.play(resource)
                        }
                    })
                }
            })
        }
    },
    {
        name: "stop",
        description: "Stop music",
        run: (ctx) => {
            const voice = ctx.guild.members.me.voice

            // Checking if bot is in a voice channel
            if (!voice || !players[ctx.guild.id]) {
                return ctx.reply("Not in a voice channel.")
            }

            // Stopping the player
            players[ctx.guild.id].stop()

            // Removing the player (needed on line 100 check)
            players[ctx.guild.id] = undefined
        }
    },
    {
        name: "leave",
        description: "Leave the channel",
        run: async (ctx) => {
            const voice = ctx.guild.members.me.voice

            // Checking if bot is in a voice channel
            if (!voice || !players[ctx.guild.id]) {
                return ctx.reply("Not in a voice channel.")
            }

            // Stopping the player
            players[ctx.guild.id].stop()

            // Removing the player (needed on line 100 check)
            players[ctx.guild.id] = undefined

            // Disconnecting, obviously.
            await voice.disconnect()
        }
    }
]

module.exports.players = players // For use in events/voice.js