/**
 * Generates a URL-safe slug from text
 * @param text - Text to convert to slug
 * @returns URL-safe slug (lowercase, hyphenated)
 */
export function slugify(text: string): string {
  return text
    .normalize('NFD') // Normalize unicode
    .replace(/[\u0300-\u036f]/g, '') // Remove diacritics
    .toLowerCase()
    .trim()
    .replace(/[^a-z0-9\s-]/g, '') // Remove non-alphanumeric except spaces and hyphens
    .replace(/\s+/g, '-') // Replace spaces with hyphens
    .replace(/-+/g, '-') // Collapse multiple hyphens
    .replace(/^-+|-+$/g, '') // Remove leading/trailing hyphens
}

/**
 * Generates a unique slug by appending a suffix if needed
 * @param text - Text to convert to slug
 * @param existingSlugs - Array of existing slugs to avoid collisions
 * @returns Unique URL-safe slug
 */
export function uniqueSlugify(text: string, existingSlugs: string[]): string {
  const baseSlug = slugify(text)

  if (!existingSlugs.includes(baseSlug)) {
    return baseSlug
  }

  // Append incrementing numbers until unique
  let counter = 1
  let slug = `${baseSlug}-${counter}`

  while (existingSlugs.includes(slug)) {
    counter++
    slug = `${baseSlug}-${counter}`
  }

  return slug
}