// Final fixed API call - handles URL encoding edge cases properly
export const code = async (inputs) => {
  const { diagram, format } = inputs;

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

  // Normalize line endings
  const normalizedDiagram = diagram
    .replace(/\r\n/g, '\n')  // Convert Windows line endings
    .replace(/\r/g, '\n')    // Convert old Mac line endings
    .trim();                 // Remove leading/trailing whitespace

  // Use URLSearchParams for proper encoding of complex content
  const params = new URLSearchParams();
  params.set('type', format);
  params.set('data', normalizedDiagram);
  
  // Log for debugging
  console.log("Original diagram:");
  console.log(JSON.stringify(normalizedDiagram));
  console.log("URL params:");
  console.log(params.toString());

  // Build URL manually to avoid double encoding issues
  const url = `https://diagrams.starbit.cloud/generate?${params.toString()}`;
  
  const resp = await fetch(url, {
    method: "GET",
    headers: {
      'Accept': 'image/svg+xml, image/png, */*',
      'User-Agent': 'Mermaid-Client/1.0'
    }
  });

  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 };
};