import Hyperswarm from 'hyperswarm';
import EventEmitter from 'node:events'
import b4a from "b4a";

class Client extends EventEmitter {
  constructor(botName) {
    super();
    if(!botName) return console.error("BotName is not defined!");
    this.botName = botName;
    this.swarm = new Hyperswarm();
    this.setupSwarm();
  }

  setupSwarm() {
    this.swarm.on('connection', (peer) => {
      peer.on('data', message => this.emit('onMessage', peer, JSON.parse(message.toString())));
      peer.on('error', e => {
        this.emit('onError', e);
        console.error(`Connection error: ${e}`)
      });
    });

    this.swarm.on('update', () => {
      console.log(`Connections count: ${this.swarm.connections.size} / Peers count: ${this.swarm.peers.size}`);

      this.swarm.peers.forEach((peerInfo, peerId) => {
        // Please do not try to understand what is going on here. I have no idea anyway. But it surprisingly works

        const peer = [peerId];
        const peerTopics = [peerInfo.topics]
            .filter(topics => topics)
            .map(topics => topics.map(topic => b4a.toString(topic, 'hex')));

        console.log(`Peer ${peer} is in topic(s) [${peerTopics.join(", ")}]`);
      });
    });
  }

  joinChatRoom(chatRoomID) {
    this.discovery = this.swarm.join(Buffer.from(chatRoomID, 'hex'), {client: true, server: true});
    this.discovery.flushed().then(() => {
      console.log(`Bot ${this.botName} joined the chat room.`);
      this.emit('onBotJoinRoom');
    });
  }

  sendMessage(roomPeers, message) {
    console.log('Bot name:', this.botName);
    const timestamp = Date.now(); // Generate timestamp
    const peers = [...this.swarm.connections].filter(peer => roomPeers.includes(peer.remotePublicKey.toString('hex'))); // We remove all the peers that arent included in a room
    const data = JSON.stringify({name: this.botName, message, timestamp}); // Include timestamp
    for (const peer of peers) peer.write(data);
  }

  sendMessageToAll(message) {
    console.log('Bot name:', this.botName);
    const timestamp = Date.now(); // Generate timestamp
    const peers = [...this.swarm.connections]
    const data = JSON.stringify({name: this.botName, message, timestamp}); // Include timestamp
    for (const peer of peers) peer.write(data);
  }

  destroy() {
    this.swarm.destroy();
    console.log(`Bot ${this.botName} disconnected.`);
  }
}

export default Client;