#!/usr/bin/env node
/**
 * validate-storybook: build Storybook, serve on 6007, run audit, then stop server.
 * Single command for CI/local: npm run validate:storybook
 */
const { spawn, execSync } = require('child_process');
const http = require('http');
const path = require('path');

const PORT = 6007;
const INDEX_URL = `http://localhost:${PORT}/index.json`;
const POLL_MS = 500;
const POLL_TIMEOUT_MS = 60000;

function waitForUrl(url, timeoutMs) {
  const start = Date.now();
  return new Promise((resolve, reject) => {
    const tryOnce = () => {
      const req = http.get(url, (res) => {
        if (res.statusCode === 200) {
          resolve();
          return;
        }
        res.resume();
        schedule();
      });
      req.on('error', () => schedule());
      req.setTimeout(5000, () => {
        req.destroy();
        schedule();
      });
    };
    const schedule = () => {
      if (Date.now() - start > timeoutMs) {
        reject(new Error(`Timeout waiting for ${url}`));
        return;
      }
      setTimeout(tryOnce, POLL_MS);
    };
    tryOnce();
  });
}

function runBuild() {
  console.log('[validate-storybook] Running build-storybook...');
  execSync('npm run build-storybook', {
    stdio: 'inherit',
    cwd: path.resolve(__dirname, '..'),
  });
}

function main() {
  const cwd = path.resolve(__dirname, '..');

  runBuild();

  const serve = spawn('npx', ['serve', 'storybook-static', '-l', String(PORT)], {
    stdio: 'pipe',
    shell: true,
    cwd,
  });

  let auditExitCode = 1;
  serve.on('error', (err) => {
    console.error('[validate-storybook] Failed to start serve:', err);
    process.exit(1);
  });

  waitForUrl(INDEX_URL, POLL_TIMEOUT_MS)
    .then(() => {
      console.log('[validate-storybook] Server ready, running audit...');
      const audit = spawn('node', ['scripts/audit-storybook.js'], {
        stdio: 'inherit',
        shell: true,
        cwd,
      });
      return new Promise((res) => {
        audit.on('exit', (code) => {
          auditExitCode = code ?? 1;
          res();
        });
      });
    })
    .catch((err) => {
      console.error('[validate-storybook]', err.message);
      auditExitCode = 1;
    })
    .finally(() => {
      serve.kill('SIGTERM');
      serve.on('exit', () => {
        process.exit(auditExitCode);
      });
      setTimeout(() => {
        serve.kill('SIGKILL');
        process.exit(auditExitCode);
      }, 5000);
    });
}

main();