import { clsx, type ClassValue } from 'clsx'
import { twMerge } from 'tailwind-merge'

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs))
}

/**
 * Generate a UUID v4 with fallback for older browsers
 * Uses crypto.randomUUID() if available, otherwise falls back to manual generation
 */
export function generateUUID(): string {
  // Use native API if available (modern browsers)
  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, (c) => {
    const r = (Math.random() * 16) | 0
    const v = c === 'x' ? r : (r & 0x3) | 0x8
    return v.toString(16)
  })
}