export default {
  async fetch(request, env) {
    // 1. Get the requested path from the URL
    const url = new URL(request.url);
    const cleanPath = decodeURIComponent(url.pathname).replace(/^\/+|\/+$/g, '');

    // 2. Query GitHub Contents API for this path
    // (Replace these with your actual GitHub username and repository name)
    const GITHUB_OWNER = 'Doume-20';
    const GITHUB_REPO = 'dl.20.doume.be';
    const GITHUB_BRANCH = 'main';

    const apiUrl = `https://api.github.com/repos/${GITHUB_OWNER}/${GITHUB_REPO}/contents/${cleanPath}?ref=${GITHUB_BRANCH}`;
    const headers = {
      'User-Agent': 'Cloudflare-Worker-Dir-Listing',
      'Accept': 'application/vnd.github.v3+json',
    };

    // If your repo is private, add your token via: npx wrangler secret put GITHUB_TOKEN
    if (env && env.GITHUB_TOKEN) {
      headers['Authorization'] = `Bearer ${env.GITHUB_TOKEN}`;
    }

    const ghRes = await fetch(apiUrl, {
      headers,
      cf: { cacheTtl: 60, cacheEverything: true }
    });

    if (!ghRes.ok) {
      return new Response(`Not Found (${ghRes.status})`, { status: ghRes.status });
    }

    const data = await ghRes.json();

    // 3. If it's a file, stream its raw content directly from GitHub (bypassing 25MB limits)
    if (!Array.isArray(data)) {
      if (data.download_url) {
        const fileRes = await fetch(data.download_url, { headers });
        const respHeaders = new Headers(fileRes.headers);
        respHeaders.delete('content-security-policy');
        return new Response(fileRes.body, { status: fileRes.status, headers: respHeaders });
      }
      return new Response('Unable to download file', { status: 400 });
    }

    // 4. If it's a directory, sort and build the WordPress-style HTML list
    data.sort((a, b) => (a.type === b.type ? a.name.localeCompare(b.name) : a.type === 'dir' ? -1 : 1));

    const displayPath = '/' + cleanPath;
    const rows = data.map(item => {
      const isDir = item.type === 'dir';
      const href = `/${cleanPath ? cleanPath + '/' : ''}${encodeURIComponent(item.name)}${isDir ? '/' : ''}`;
      return `<li><a href="${href}">${item.name}${isDir ? '/' : ''}</a></li>`;
    }).join('');

    const html = `<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Index of ${displayPath}</title>
</head>
<body>
  <h1>Index of ${displayPath}</h1>
  <ul>
    ${cleanPath ? '<li><a href="../">Parent Directory</a></li>' : ''}
    ${rows}
  </ul>
</body>
</html>`;

    return new Response(html, {
      headers: { 'Content-Type': 'text/html; charset=utf-8' }
    });
  }
};