/**
 * Scans src/components/ and regenerates src/components/index.ts.
 * Each component folder must have an index.ts that exports the component.
 * Run: npm run barrel
 */

import { readdir, writeFile, stat } from 'fs/promises';
import { join, resolve } from 'path';
import { fileURLToPath } from 'url';

const __dirname = fileURLToPath(new URL('.', import.meta.url));
const componentsDir = resolve(__dirname, '../src/components');
const outputFile = join(componentsDir, 'index.ts');

const entries = await readdir(componentsDir);

const componentFolders = (
  await Promise.all(
    entries.map(async (name) => {
      const fullPath = join(componentsDir, name);
      const info = await stat(fullPath);
      return info.isDirectory() ? name : null;
    })
  )
).filter(Boolean);

if (componentFolders.length === 0) {
  console.log('No component folders found.');
  process.exit(0);
}

const lines = [
  '// Auto-generated by scripts/generate-barrel.mjs — do not edit manually.',
  '',
  ...componentFolders.map((name) => `export * from './${name}/index.ts';`),
  '',
];

await writeFile(outputFile, lines.join('\n'), 'utf-8');

console.log(`Barrel generated with ${componentFolders.length} component(s):`);
componentFolders.forEach((name) => console.log(`  - ${name}`));