const fs = require('fs');
const path = require('path');

const releasesDir = path.resolve(__dirname, '..', 'docs', 'releases');
const manifestPath = path.join(releasesDir, 'releases-manifest.json');

function toTitle(fileName) {
  return path.basename(fileName, path.extname(fileName));
}

function getReleaseEntries() {
  if (!fs.existsSync(releasesDir)) {
    return [];
  }

  return fs.readdirSync(releasesDir, { withFileTypes: true })
    .filter((entry) => entry.isFile() && path.extname(entry.name).toLowerCase() === '.md')
    .map((entry) => entry.name)
    .sort((left, right) => right.localeCompare(left, undefined, { numeric: true, sensitivity: 'base' }))
    .map((fileName) => ({
      fileName,
      title: toTitle(fileName)
    }));
}

function main() {
  fs.mkdirSync(releasesDir, { recursive: true });

  const manifest = {
    revisions: getReleaseEntries()
  };

  fs.writeFileSync(manifestPath, JSON.stringify(manifest, null, 2) + '\n', 'utf8');
}

main();