const Discord = require('discord.js');
const Hyperswarm = require('hyperswarm');
const crypto = require('hypercore-crypto');
const { Client, GatewayIntentBits, Partials, messageLink } = require("discord.js");
const goodbye = require('graceful-goodbye')
require('dotenv').config()
const b4a = require('b4a')

function sleep(ms) {
    return new Promise((resolve) => {
        setTimeout(resolve, ms);
    });
}

const client = new Client({
    'intents': [
        GatewayIntentBits.DirectMessages,
        GatewayIntentBits.MessageContent,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildBans,
        GatewayIntentBits.GuildMessages
    ],
    'partials': [Partials.Channel, Partials.Message, Partials.MessageContent]
});



const topicMap = new Map();
const swarmMap = new Map();


client.on('ready', () => {
    console.log(`Logged in as ${client.user.tag}!`);
});

client.on('messageCreate', msg => {

    if (msg.content.startsWith("!") && !msg.author.bot) {
        const args = msg.content.split(" ");
        const cmd = args.shift().slice(1);

        if (cmd === "current") {
            if (topicMap.has(msg.channel.id)) {
                let topic_obj = topicMap.get(msg.channel.id);
                msg.reply(`The current topic for this channel is: ${topic_obj.topic.toString('hex')}`);
            }
            else {
                msg.reply(`No topic is assigned for this channel`);
            }
        }

        if (cmd === "join-topic") {
            if (!args[0]) {
                msg.reply("Please provide a new topic in hexadecimal format");
                return;
            }
            let topic = crypto.randomBytes(32);
            let channel_id = args[1];
            if (!channel_id) {
                msg.reply("Please provide a channel_id to send this topic's messages")
                return;
            }
            //Check if the given channel_id exists or not.
            if (!client.channels.cache.get(channel_id)) {
                msg.reply("The provided channel id does not exist.");
                return;
            }
            let swarm;
            let conns = [];
            if (topicMap.has(channel_id)) {
                topic_obj = topicMap.get(channel_id);
                swarm = topic_obj.swarm;
                conns = topic_obj.conns;
            }
            else {
                swarm = new Hyperswarm();
                topicMap.set(channel_id, { topic: topic, swarm: swarm, conns: conns });
                // Join the new topic
                swarm.join(topic, {
                    lookup: true,
                    announce: true,
                    timeout: 60000
                });


                swarm.on('connection', (conn, info) => {
                    console.log(`Connected to a peer`);
                    conns.push(conn);
                    conn.on('data', data => {
                        // Send the message from the topic to the Discord channel
                        client.channels.fetch(channel_id).then(channel => channel.send(data.toString()))
                    });

                    conn.on('close', () => clearInterval(checkInactiveInterval))
                });

                client.channels.fetch(channel_id).then(channel => {
                    msg.reply(`Successfully joined topic and sending messages to ${channel}`);

                });

            }
        }

        if (cmd === "set") {

            let channel_id = msg.channel.id;
            //Check if the given channel_id exists or not.
            if (!client.channels.cache.get(channel_id)) {
                msg.reply("The provided channel id does not exist.");
                return;
            }
            let topic = crypto.randomBytes(32);
            let swarm;
            let conns = [];
            if (topicMap.has(channel_id)) {
                topic_obj = topicMap.get(channel_id);
                conns = topic_obj.conns;
            }
            else {
                topicMap.set(channel_id, { topic: topic, conns: conns });
            }
            if (!swarmMap.has(topic)) {
                swarm = new Hyperswarm();
                swarmMap.set(topic, swarm);
                // Join the new topic
                swarm.join(topic, {
                    lookup: true,
                    announce: true,
                    timeout: 60000
                });
                swarm.on('connection', (conn, info) => {
                    console.log(`Connected to a peer for topic ${topic.toString('hex')}`);
                    conns.push(conn);
                    conn.on('data', data => {
                        console.log(data.toString())
                        if (data.toString().startsWith('CLOSED:')) {
                            // Extract the key from the message string
                            const key = data.toString().split(':')[1].trim();
                            // Iterate through the conns array and remove the client with the matching key
                            console.log(`Removing peer ${key}`);
                            (async () => {

                                await sleep(5000)
                                conns = conns.filter(c => c !== conn);
                                conn.destroy();
                            })();


                        } else {
                            if (data.toString().includes(">")) return
                            if (!data.toString().startsWith("anon")){
                                let split = data.toString().split(":")
                                console.log(split[0])
                                let dUser = client.users.fetch(split[0]);
                                dUser.then(function (result) {
                                    console.log(split)
                                    client.channels.fetch(channel_id).then(channel => channel.send(`${result.username}: ${split[1]}`))
    
                                });
                            } else {
                                client.channels.fetch(channel_id).then(channel => channel.send(data.toString()))

                            }
                            
                        }
                    });
                });
                client.channels.fetch(channel_id).then(channel => {
                    msg.reply(`Successfully joined topic and sending messages to ${channel}`);

                });
            } else {
                swarm = swarmMap.get(topic);
                swarm.join(topic, {
                    lookup: true,
                    announce: true,
                    timeout: 60000
                });
                client.channels.fetch(channel_id).then(channel => {
                    msg.reply(`Successfully joined topic and sending messages to ${channel}`);
                });
            }
        }



        if (cmd === "leave-topic") {
            let channel_id = msg.channel.id;
            let topic_obj = topicMap.get(channel_id);
            if (topic_obj) {
                topic_obj.swarm.leave(topic_obj.topic);
                topicMap.delete(channel_id);
                return msg.reply(`Successfully left topic ${topic_obj.topic.toString('hex')} for channel ${channel_id}`);
            } else {
                return msg.reply(`No topic is assigned for this channel`);
            }
        }

    }
    // Check if message is sent in a channel with a topic assigned and send it to the topic
    if (topicMap.has(msg.channel.id) && !msg.author.bot) {
        let topic_obj = topicMap.get(msg.channel.id);
        let conns = topic_obj.conns;
        for (const conn of conns) {

            conn.write(`${msg.author.username}(Discord): ${msg.content}`);
        }
    }
});

client.login(process.env.TOKEN);