#!/usr/bin/env node
/**
 * Codex OAuth login relay for the hardened harness.
 *
 * `codex login` binds its callback server to 127.0.0.1:1455 inside the
 * container. A Docker port publish forwards to the container interface, not
 * loopback, so the host browser's redirect to http://localhost:1455 is
 * refused. This bridges the published interface to loopback:
 *
 *   host 127.0.0.1:1455 -> container 0.0.0.0:1456 (this relay) -> 127.0.0.1:1455
 *
 * Run inside the networked session before `codex login`:
 *   node /ecc/docker/plugin-setup/codex-auth-relay.js &
 *
 * Env: ECC_RELAY_LISTEN (default 1456), ECC_RELAY_TARGET (default 1455).
 */

'use strict';

const net = require('net');

const listenPort = Number(process.env.ECC_RELAY_LISTEN || 1456);
const targetPort = Number(process.env.ECC_RELAY_TARGET || 1455);

net.createServer(client => {
  const upstream = net.connect(targetPort, '127.0.0.1');
  client.pipe(upstream).pipe(client);
  const drop = () => {
    client.destroy();
    upstream.destroy();
  };
  client.on('error', drop);
  upstream.on('error', drop);
}).listen(listenPort, '0.0.0.0', () => {
  console.log(`codex-auth-relay: 0.0.0.0:${listenPort} -> 127.0.0.1:${targetPort}`);
});