#!/usr/bin/env node
/**
 * Free PORT (default 3010) so npm run dev can bind after orphaned node --watch processes.
 */
const { execSync } = require('child_process');

const port = String(process.env.PORT || 3010).trim();

function pidsListening() {
  try {
    const out = execSync(`lsof -tiTCP:${port} -sTCP:LISTEN`, { encoding: 'utf8' }).trim();
    if (!out) return [];
    return [...new Set(out.split(/\s+/).filter(Boolean))];
  } catch {
    return [];
  }
}

const pids = pidsListening();
if (!pids.length) {
  console.log(`[free-port] :${port} already free`);
  process.exit(0);
}

for (const pid of pids) {
  try {
    process.kill(Number(pid), 'SIGKILL');
    console.log(`[free-port] killed pid ${pid} on :${port}`);
  } catch (err) {
    console.warn(`[free-port] could not kill ${pid}:`, err.message);
  }
}

// brief wait for OS to release the socket
Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, 300);
const left = pidsListening();
if (left.length) {
  console.error(`[free-port] still in use by: ${left.join(', ')}`);
  process.exit(1);
}
console.log(`[free-port] :${port} is free`);