/**
 * TikZ renderer using node-tikzjax
 * Converts TikZ LaTeX code to SVG for browser rendering
 */

// We'll use a simple approach for now since node-tikzjax might not be available
// This is a placeholder implementation that can be enhanced later

export function renderTikZ(tikzCode: string): string {
  try {
    // For now, we'll create a simple SVG placeholder
    // In a full implementation, this would use node-tikzjax or similar library
    
    // Extract TikZ content and create a basic SVG
    const svgContent = createBasicSVG(tikzCode);
    
    return svgContent;
  } catch (error) {
    console.error('Failed to render TikZ:', error);
    return `<div class="tikz-error text-red-500 p-4 border border-red-300 rounded">
      <p class="font-bold">TikZ Rendering Error</p>
      <p class="text-sm">Failed to render TikZ diagram. Original code:</p>
      <pre class="mt-2 p-2 bg-gray-100 rounded text-xs overflow-x-auto">${tikzCode}</pre>
    </div>`;
  }
}

/**
 * Creates a basic SVG placeholder for TikZ content
 * This is a temporary implementation until proper TikZ rendering is available
 */
function createBasicSVG(tikzCode: string): string {
  // Create a simple SVG with the TikZ code as text
  const width = 400;
  const height = 300;
  
  return `<svg width="${width}" height="${height}" class="tikz-diagram max-w-full h-auto rounded-lg shadow-lg my-4" viewBox="0 0 ${width} ${height}">
    <rect width="${width}" height="${height}" fill="white" stroke="#ccc" stroke-width="1"/>
    <text x="10" y="20" font-family="monospace" font-size="12" fill="#666">
      TikZ Diagram
    </text>
    <text x="10" y="40" font-family="monospace" font-size="10" fill="#999">
      (Rendering not yet implemented)
    </text>
    <foreignObject x="10" y="60" width="${width - 20}" height="${height - 70}">
      <div xmlns="http://www.w3.org/1999/xhtml" style="font-family: monospace; font-size: 10px; color: #666; overflow: hidden;">
        <pre style="margin: 0; white-space: pre-wrap; word-break: break-all;">${escapeHtml(tikzCode)}</pre>
      </div>
    </foreignObject>
  </svg>`;
}

/**
 * Escapes HTML characters for safe display
 */
function escapeHtml(text: string): string {
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}