const BASE = "https://temp.imgur.gg";

export async function onRequest(context) {
  const { request } = context;

  if (request.method !== "POST") {
    return new Response("Method not allowed", { status: 405 });
  }

  const formData = await request.formData();
  const file = formData.get("file");

  if (!file) {
    return new Response("No file", { status: 400 });
  }

  const buffer = await file.arrayBuffer();
  // 1. GET site to grab cookie
  const getRes = await fetch(BASE, {
    method: "GET",
  });

  const setCookie = getRes.headers.get("set-cookie") || "";
  const cookie = setCookie.split(";")[0]; // _s=xxxxx

  // 2. Request metadata WITH cookie

  const metadataRes = await fetch(`${BASE}/api/upload`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Cookie: cookie,
      Origin: BASE,
      Referer: BASE + "/",
    },
    body: JSON.stringify({
      files: [
        {
          fileName: file.name,
          fileType: file.type,
          fileSize: file.size,
        },
      ],
    }),
  });

  if (!metadataRes.ok) {
    const text = await metadataRes.text();
    return new Response("Metadata failed: " + text, { status: 500 });
  }

  const metadata = await metadataRes.json();
  const uploadInfo = metadata.files[0];

  // 3. Upload to signed URL

  const uploadRes = await fetch(uploadInfo.uploadUrl, {
    method: "PUT",
    headers: {
      "Content-Type": file.type,
    },
    body: buffer,
  });

  if (!uploadRes.ok) {
    return new Response("Upload failed", { status: 500 });
  }

  // 4. Return public URL

  const publicUrl =
    `https://i.imgur.gg/${uploadInfo.fileId}-${uploadInfo.fileName}`;

  return new Response(
    JSON.stringify({
      success: true,
      url: publicUrl,
    }),
    {
      headers: { "Content-Type": "application/json" },
    }
  );
}