/**
 * UUID utility with fallback for older browsers
 * 
 * crypto.randomUUID() is only available in:
 * - Node.js 15.6.0+
 * - Chrome 92+, Firefox 95+, Safari 15.4+
 * 
 * This provides a fallback for older browsers.
 */

export function generateUUID(): string {
  // Try native crypto.randomUUID first
  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
    return crypto.randomUUID();
  }
  
  // Fallback: Generate UUID v4 manually
  // Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    const r = Math.random() * 16 | 0;
    const v = c === 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}