export async function whatsmyname(req) {
  const { searchParams: sp } = new URL(req.url);
  const username = sp.get('username');
  const mode = sp.get('mode') || 'all';
  const rescan = sp.get('rescan') || 'false';

  if (!username) {
    return {
      error: "missing username",
      usage: {
        all: "/whatsmyname?username=archtheslut",
        exist: "/whatsmyname?username=archtheslut&mode=exist",
        notexist: "/whatsmyname?username=archtheslut&mode=notexist",
        rescan: "/whatsmyname?username=archtheslut&rescan=true"
      }
    };
  }

  try {
    const res = await fetch("https://api.whatsmyname.io/discoverprofile", {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ source: username, type: "name", rescan: rescan === 'true' })
    });
    const data = await res.json();

    if (data.error) return { error: data.error };

    const results = data.result.map(r => ({
      url: r.url,
      source: r.source,
      exists: r.isExist,
      category: r.category
    }));

    if (mode === 'exist') {
      const found = results.filter(r => r.exists);
      return { username, rescan: rescan === 'true', total: found.length, found };
    }

    if (mode === 'notexist') {
      const notFound = results.filter(r => !r.exists);
      return { username, rescan: rescan === 'true', total: notFound.length, not_found: notFound };
    }

    const existCount = results.filter(r => r.exists).length;

    return {
      username,
      rescan: rescan === 'true',
      total: results.length,
      exists: existCount,
      not_exists: results.length - existCount,
      results
    };
  } catch (err) {
    return { error: err.message };
  }
}