#!/usr/bin/env node
// Minimaler RCON-Client für lokale Tests: node tools/rcon.mjs <host> <port> <passwort> <befehl...>
import net from 'node:net';

const [host, port, password, ...cmd] = process.argv.slice(2);
if (!host || !port || !password || cmd.length === 0) {
  console.error('usage: node tools/rcon.mjs <host> <port> <password> <command...>');
  process.exit(1);
}

const packet = (id, type, body) => {
  const payload = Buffer.from(body, 'utf8');
  const buf = Buffer.alloc(14 + payload.length);
  buf.writeInt32LE(10 + payload.length, 0);
  buf.writeInt32LE(id, 4);
  buf.writeInt32LE(type, 8);
  payload.copy(buf, 12);
  return buf;
};

const socket = net.connect(Number(port), host, () => socket.write(packet(1, 3, password)));
let buf = Buffer.alloc(0);
let authed = false;
socket.on('data', (chunk) => {
  buf = Buffer.concat([buf, chunk]);
  while (buf.length >= 4 && buf.length >= buf.readInt32LE(0) + 4) {
    const len = buf.readInt32LE(0);
    const id = buf.readInt32LE(4);
    const body = buf.toString('utf8', 12, 4 + len - 2);
    buf = buf.subarray(4 + len);
    if (!authed) {
      if (id === -1) {
        console.error('rcon: authentication failed');
        process.exit(2);
      }
      authed = true;
      socket.write(packet(2, 2, cmd.join(' ')));
    } else {
      if (body) console.log(body);
      socket.end();
    }
  }
});
socket.on('error', (e) => {
  console.error(`rcon: ${e.message}`);
  process.exit(3);
});