import fetch from 'node-fetch';

const INSTAGRAM_TOKEN = process.env.INSTAGRAM_TOKEN;

export async function getInstagramData(url) {
  const reelMatch = url.match(/instagram\.com\/(?:p|reel)\/([A-Za-z0-9_-]+)/);
  const usernameMatch = url.match(/instagram\.com\/([^/]+)\//);

  if (INSTAGRAM_TOKEN) {
    try {
      const oembedUrl = `https://graph.facebook.com/v18.0/instagram_oembed?url=${encodeURIComponent(url)}&fields=author_name,thumbnail_url,title,html&access_token=${INSTAGRAM_TOKEN}`;
      const response = await fetch(oembedUrl);
      if (response.ok) {
        const data = await response.json();
        return {
          title: data.title || '',
          author: data.author_name || '',
          authorUrl: `https://www.instagram.com/${data.author_name || ''}`,
          thumbnail: data.thumbnail_url || '',
          embedHtml: data.html || '',
          reelId: reelMatch ? reelMatch[1] : null,
        };
      }
    } catch (e) {
      console.error('Instagram oEmbed Fehler:', e.message);
    }
  }

  return {
    title: '',
    author: usernameMatch ? usernameMatch[1] : '',
    authorUrl: usernameMatch ? `https://www.instagram.com/${usernameMatch[1]}` : '',
    thumbnail: '',
    embedHtml: '',
    reelId: reelMatch ? reelMatch[1] : null,
  };
}

export function isInstagramUrl(url) {
  return /instagram\.com\/(p|reel)\//.test(url);
}