// Generate _redirects file for pretty URLs
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const contentDir = path.join(__dirname, '../src/content/blog');

const redirects = [
  '# redirects for pretty URLs - generated automatically',
  ''
];

// Read all blog post directories
const entries = fs.readdirSync(contentDir, { withFileTypes: true });
for (const entry of entries) {
  if (entry.isDirectory()) {
    const slug = entry.name;
    const postDir = path.join(contentDir, slug);
    const hasPostFile = ['index.md', 'index.mdx'].some((file) => {
      const postPath = path.join(postDir, file);
      return fs.existsSync(postPath) && fs.statSync(postPath).isFile();
    });

    if (!hasPostFile) {
      continue;
    }

    redirects.push(`/${slug} /blog/${slug} 200`);
  }
}

// Write _redirects file
const outputPath = path.join(__dirname, '../public/_redirects');
fs.writeFileSync(outputPath, redirects.join('\n') + '\n');

console.log(`Generated ${redirects.length - 2} redirects`);