#!/usr/bin/env node
'use strict';

const fs = require('fs'), path = require('path');
const { Supervisor } = require('../runtime/supervisor');
const root = path.resolve(__dirname, '..');
const lock = path.resolve(process.env.SCRAPER_DATA || path.join(process.env.DATA || path.join(root, 'data'), 'scraper'), 'supervisor.lock');
fs.mkdirSync(path.dirname(lock), { recursive: true });
if (fs.existsSync(lock)) {
  const pid = Number(fs.readFileSync(lock, 'utf8'));
  try { process.kill(pid, 0); throw new Error(`Supervisor already alive (PID ${pid})`); }
  catch (e) { if (e.code !== 'ESRCH') throw e; fs.unlinkSync(lock); }
}
fs.writeFileSync(lock, String(process.pid), { flag: 'wx' });
const supervisors = ['reader', 'scraper'].map(name => new Supervisor(name, { root }));
supervisors.forEach(service => service.start());
const keepalive = setInterval(() => {}, 60000);
let closing = false;
for (const signal of ['SIGINT', 'SIGTERM']) process.on(signal, async () => {
  if (closing) return; closing = true; clearInterval(keepalive);
  await Promise.all(supervisors.map(service => service.close()));
  fs.unlinkSync(lock); process.exit(0);
});