// Simple POST fix - back to basics with proper headers
export const code = async (inputs) => {
  const { diagram, format } = inputs;

  if (!diagram || !diagram.trim()) {
    throw new Error("No Mermaid input provided");
  }

  // Ensure proper line endings (just normalize, don't over-process)
  const cleanDiagram = diagram.replace(/\r\n/g, '\n').replace(/\r/g, '\n');
  
  console.log("Sending diagram (length: " + cleanDiagram.length + "):");
  console.log(JSON.stringify(cleanDiagram));

  const url = `https://diagrams.starbit.cloud/generate?type=${format}`;
  
  const resp = await fetch(url, {
    method: "POST",
    headers: {
      "Content-Type": "text/plain",
      "Content-Length": cleanDiagram.length.toString()
    },
    body: cleanDiagram
  });

  if (!resp.ok) {
    const txt = await resp.text();
    throw new Error(`Mermaid-server error ${resp.status}: ${txt}`);
  }

  const buffer = Buffer.from(await resp.arrayBuffer());
  const mime = format === "png" ? "image/png" : "image/svg+xml";
  const file = `data:${mime};base64,${buffer.toString("base64")}`;

  return { file };
};