// n8n Code node — Health Check
// Usa https de Node.js (NODE_FUNCTION_ALLOW_BUILTIN=https)
// Patrón async IIFE: compatible con n8n 2.x task runner

const https = require('https');

return await (async () => {

  // ── Configuración ────────────────────────────────────────────────────────

  const TELEGRAM_TOKEN  = '8611913802:AAFlrFtc0vYISOliO_W8B4c-W1ue0hG9Fio';
  const TELEGRAM_CHAT   = '5138407666';
  const RESTART_WEBHOOK = 'https://n8n.chemavx.xyz/webhook/uptime-kuma-restart';

  const SERVICES = [
    { name: 'n8n',         url: 'https://n8n.chemavx.xyz' },
    { name: 'openclaw',    url: 'https://openclaw.chemavx.xyz' },
    { name: 'vaultwarden', url: 'https://vaultwarden.chemavx.xyz' },
    { name: 'grafana',     url: 'https://grafana.chemavx.xyz' },
    { name: 'uptime',      url: 'https://uptime.chemavx.xyz' },
    { name: 'auth',        url: 'https://auth.chemavx.xyz' },
    { name: 'home',        url: 'https://home.chemavx.xyz' },
    { name: 'git',         url: 'https://git.chemavx.xyz' },
    { name: 'argocd',      url: 'https://argocd.chemavx.xyz' },
    { name: 'polymarket',  url: 'https://polymarket.chemavx.xyz' },
    { name: 'ollama',      url: 'https://ollama.chemavx.xyz/api/tags' },
  ];

  // ── Helpers ──────────────────────────────────────────────────────────────

  const checkService = (service) => {
    return new Promise((resolve) => {
      const req = https.get(service.url, (res) => {
        resolve({ name: service.name, url: service.url, ok: res.statusCode < 400, status: res.statusCode });
        res.resume();
      });
      req.on('error', (err) => {
        resolve({ name: service.name, url: service.url, ok: false, status: 0, reason: err.message });
      });
      req.setTimeout(10000, () => {
        req.destroy();
        resolve({ name: service.name, url: service.url, ok: false, status: 0, reason: 'timeout' });
      });
    });
  };

  const httpsPost = (urlStr, body) => {
    return new Promise((resolve) => {
      const data = JSON.stringify(body);
      const u = new URL(urlStr);
      const options = {
        hostname: u.hostname,
        path:     u.pathname + u.search,
        method:   'POST',
        headers:  { 'Content-Type': 'application/json', 'Content-Length': Buffer.byteLength(data) },
      };
      const req = https.request(options, (res) => {
        res.resume();
        resolve();
      });
      req.on('error', () => resolve());
      req.setTimeout(10000, () => { req.destroy(); resolve(); });
      req.write(data);
      req.end();
    });
  };

  const sendTelegram = (text) => {
    return httpsPost(
      'https://api.telegram.org/bot' + TELEGRAM_TOKEN + '/sendMessage',
      { chat_id: TELEGRAM_CHAT, text, parse_mode: 'Markdown' }
    );
  };

  const triggerRestart = (failedServices) => {
    return httpsPost(RESTART_WEBHOOK, { failed: failedServices });
  };

  // ── Main ─────────────────────────────────────────────────────────────────

  const results = await Promise.all(SERVICES.map(checkService));
  const failed  = results.filter(r => !r.ok);
  const passed  = results.filter(r =>  r.ok);

  if (failed.length > 0) {
    const lines = failed
      .map(s => '• *' + s.name + '*: ' + (s.reason || ('HTTP ' + s.status)) + ' (' + s.url + ')')
      .join('\n');

    const message = '⚠️ *Health Check Failed*\n\n' + lines + '\n\n_Auto-restart triggered_';

    await sendTelegram(message);
    await triggerRestart(failed);
  }

  // ── Return ───────────────────────────────────────────────────────────────

  return [{
    json: {
      checked: results.length,
      passed:  passed.length,
      failed:  failed.length,
      allOk:   failed.length === 0,
      results,
    },
  }];

})();