import { ActivityType, Client, Events, GatewayIntentBits, OverwriteType, PermissionFlagsBits } from 'discord.js';
import { readFileSync } from "fs";

const client = new Client({ 
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildMembers,
        GatewayIntentBits.GuildPresences,
        GatewayIntentBits.GuildVoiceStates,
        GatewayIntentBits.GuildModeration
    ],
    
});
const config = JSON.parse(readFileSync("config.json", "utf-8"));

await client.login(readFileSync("token.txt", "utf-8").split("\n")[0]);

const tracker = {};

for (let guild in config) {
    tracker[guild] = {};

    for (let channel in config[guild]) {
        tracker[guild][channel] = new Set();
    }
}


async function resyncChannel(channelObj) {
    if (tracker[channelObj.guild.id] && tracker[channelObj.guild.id][channelObj.id]) {
        tracker[channelObj.guild.id][channelObj.id] = new Set(channelObj.members.map((v, k) => k));
    }
}

async function fullSync() {
    for (let guild in config) {
        const guildObj = await client.guilds.fetch(guild);

        for (let channel in config[guild]) {
            const channelObj = await guildObj.channels.fetch(channel);

            await resyncChannel(channelObj);

            await updateChannel(channelObj.id,  await guildObj.channels.fetch(config[guild][channel]));
        }
    }
}
async function updateChannel(vcId, channelObj) {
    if (!tracker[channelObj.guild.id] || !tracker[channelObj.guild.id][vcId]) return;

    let t = tracker[channelObj.guild.id][vcId];
    const permissions = channelObj.permissionOverwrites.cache.filter((v) => v.type === OverwriteType.Member);

    let extraneous = permissions.filter((v) => !t.has(v.id));
    let missing    = Array.from(t).filter(id => !permissions.has(id));

    extraneous.each(v => {
        channelObj.permissionOverwrites.delete(v.id, "Not in VC");
    });

    for (let a of missing) {
        channelObj.permissionOverwrites.create(
            a,
            {
                ViewChannel: true,
                SendMessages: true,
                AddReactions: true
            },
            {
                type: OverwriteType.Member,
                reason: "User in VC"
            }
        );
    }
}

client.on(Events.GuildAvailable, async g => {
    console.log(g.name,"available");
    await fullSync();
});

client.on(Events.GuildCreate, async g => {
    console.log(g.name,"create");
    await fullSync();
});

client.on(Events.ClientReady, async () => {
    client.user.setActivity({
        type: ActivityType.Competing,
        name: "best bot competition 2025"
    })
})

client.on(Events.VoiceStateUpdate, async (oldState, newState) => {
    if (oldState.channelId === newState.channelId) return;

    let affectedChannels = new Set();

    if (oldState.channelId && tracker[oldState.guild.id] && tracker[oldState.guild.id][oldState.channelId]) {
        tracker[oldState.guild.id][oldState.channelId].delete(oldState.id);
        affectedChannels.add(oldState.channelId);
    }

    if (newState.channelId && tracker[newState.guild.id] && tracker[newState.guild.id][newState.channelId]) {
        tracker[newState.guild.id][newState.channelId].add(newState.id);
        affectedChannels.add(newState.channelId);
    }

    for (let ch of Array.from(affectedChannels)) {
        if ( config[oldState.guild.id] && config[oldState.guild.id][ch]) {
            await updateChannel(ch, await oldState.guild.channels.fetch(config[oldState.guild.id][ch]));
        }
    }
});