Yt-Downloader

export default async function ytDownload(request) {
  const { searchParams } = new URL(request.url);
  const url = searchParams.get('url');

  if (!url || !url.includes('youtube.com') && !url.includes('youtu.be')) {
    return new Response(JSON.stringify({ error: 'Missing or invalid YouTube URL' }), {
      status: 400,
      headers: { 'Content-Type': 'application/json' },
    });
  }

  const extractVideoId = (url) => {
    const match = url.match(/(?:v=|\/)([0-9A-Za-z_-]{11})/);
    return match ? match[1] : null;
  };

  const videoId = extractVideoId(url);
  let mp3Url = null;
  let duration = null;
  let title = null;
  let thumbnail = null;
  let mp4 = null;

  try {
    // Step 1: yt1s.click MP3
    const form = new URLSearchParams();
    form.append('q', url);
    form.append('type', 'mp3');

    const res = await fetch('https://yt1s.click/search', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Origin': 'https://yt1s.click',
        'Referer': 'https://yt1s.click/',
        'User-Agent': 'Mozilla/5.0'
      },
      body: form
    });

    const text = await res.text();
    const match = text.match(/href="(\/download[^"]+)"/);
    if (match) {
      mp3Url = `https://yt1s.click${match[1]}`;
    } else {
      // Step 2: flvto fallback
      const payload = {
        fileType: 'MP3',
        id: videoId
      };

      const flvtoRes = await fetch('https://ht.flvto.online/converter', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'Origin': 'https://ht.flvto.online',
          'Referer': `https://ht.flvto.online/widget?url=https://www.youtube.com/watch?v=${videoId}`,
          'User-Agent': 'Mozilla/5.0',
        },
        body: JSON.stringify(payload)
      });

      const flvtoData = await flvtoRes.json();
      if (flvtoData?.link) {
        mp3Url = flvtoData.link;
        duration = flvtoData.duration || null;
      }
    }
  } catch (e) {
    mp3Url = null;
  }

  try {
    // Step 3: Clipto for MP4 and metadata
    const csrfres = await fetch('https://www.clipto.com/api/csrf', {
      headers: {
        'user-agent': 'Mozilla/5.0',
        'referer': 'https://www.clipto.com/id/media-downloader/youtube-downloader'
      }
    });

    const csrfData = await csrfres.json();
    const csrftoken = csrfData.token;
    const kuki = `XSRF-TOKEN=${csrftoken}`;

    const cliptoRes = await fetch('https://www.clipto.com/api/youtube', {
      method: 'POST',
      headers: {
        'x-xsrf-token': csrftoken,
        'cookie': kuki,
        'origin': 'https://www.clipto.com',
        'referer': 'https://www.clipto.com/id/media-downloader/youtube-downloader',
        'content-type': 'application/json',
        'user-agent': 'Mozilla/5.0'
      },
      body: JSON.stringify({ url })
    });

    const data = await cliptoRes.json();
    title = data.title;
    thumbnail = data.thumbnail;
    if (!duration && data.duration) {
      duration = data.duration;
    }

    const mp4WithAudio = data.medias.find(v =>
      v.ext === 'mp4' && (v.is_audio === true || v.audioQuality)
    );
    if (mp4WithAudio) {
      mp4 = mp4WithAudio.url;
    }

  } catch (err) {
    // fallback failed
  }

  const result = {
    title,
    thumbnail,
    mp4,
    mp3: mp3Url,
    duration: duration ? Math.round(duration) + 's' : null
  };

  return new Response(JSON.stringify(result, null, 2), {
    headers: { 'Content-Type': 'application/json' }
  });
}