const {spawn} = require('node:child_process');
const http = require('node:http');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const runDir = fs.mkdtempSync(path.join(os.tmpdir(), 'flood-smoke-'));
const child = spawn('npm', ['run', 'start', '--',
  '--host=127.0.0.1', '--port=3000', `--rundir=${runDir}`],
  {stdio: 'inherit', detached: true});
let startupError;
child.on('error', error => { startupError = error; });
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
const check = () => new Promise(resolve => {
  const req = http.get('http://127.0.0.1:3000/', response => {
    let bytes = 0;
    response.on('data', chunk => { bytes += chunk.length; });
    response.on('end', () => resolve(response.statusCode === 200 && bytes > 0));
  });
  req.setTimeout(1000, () => req.destroy());
  req.on('error', () => resolve(false));
});
(async () => {
  try {
    const deadline = Date.now() + 60000;
    while (Date.now() < deadline) {
      if (startupError) throw startupError;
      if (child.exitCode !== null || child.signalCode !== null) {
        throw new Error(`Flood exited before serving HTTP: ${child.exitCode ?? child.signalCode}`);
      }
      if (await check()) {
        console.log('Flood startup smoke test passed: HTTP 200 with response body');
        return;
      }
      await sleep(500);
    }
    throw new Error('Flood did not serve HTTP within 60 seconds');
  } catch (error) {
    console.error(error);
    process.exitCode = 1;
  } finally {
    if (child.pid) {
      try { process.kill(-child.pid, 'SIGTERM'); } catch (error) {
        if (error.code !== 'ESRCH') throw error;
      }
      await sleep(500);
      try { process.kill(-child.pid, 'SIGKILL'); } catch (error) {
        if (error.code !== 'ESRCH') throw error;
      }
    }
    fs.rmSync(runDir, {recursive: true, force: true});
  }
})();