// Updated smart mermaid conversion script with quadrantChart fix
export const code = async (inputs) => {
  const raw = String(inputs.diagram || "").trim();
  if (!raw) throw new Error("No Mermaid input provided");
  
  // Normalize line endings first
  let normalizedDiagram = raw
    .replace(/\r\n/g, '\n')  // Convert Windows line endings
    .replace(/\r/g, '\n');   // Convert old Mac line endings
  
  console.log("Original diagram:");
  console.log(normalizedDiagram);
  
  // Check if it's already single line
  if (!normalizedDiagram.includes('\n')) {
    console.log("Already single line, returning as-is");
    return { rawDsl: normalizedDiagram };
  }
  
  // Convert multiline to single line with semicolons
  // Added quadrantChart to convertible types to fix the text rendering issue
  const convertibleTypes = ['graph', 'flowchart', 'sequenceDiagram', 'pie', 'gitGraph', 'quadrantChart'];
  const firstWord = normalizedDiagram.split(/\s+/)[0];
  
  if (convertibleTypes.some(type => firstWord.startsWith(type))) {
    // Convert newlines to semicolons, preserving the first line structure
    const lines = normalizedDiagram.split('\n');
    const firstLine = lines[0];
    const remainingLines = lines.slice(1)
      .filter(line => line.trim()) // Remove empty lines
      .map(line => line.trim()); // Remove indentation
    
    const singleLine = firstLine + '; ' + remainingLines.join('; ');
    
    console.log("Converted to single line:");
    console.log(singleLine);
    
    return { rawDsl: singleLine };
  }
  
  // For non-convertible types (journey, stateDiagram, classDiagram), 
  // try replacing newlines with specific delimiters that might work
  console.log("Non-convertible type detected, using special encoding");
  
  // Try using a special marker that we can detect and replace on server side
  const encodedDiagram = normalizedDiagram.replace(/\n/g, ' NEWLINE ');
  
  console.log("Encoded diagram:");
  console.log(encodedDiagram);
  
  return { rawDsl: encodedDiagram };
};