export function slugify(input: string): string {
  return input
    .trim()
    .toLowerCase()
    .replace(/['"]/g, "")
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/^-+|-+$/g, "");
}

export async function generateUniqueSlug(opts: {
  base: string;
  isTaken: (slug: string) => Promise<boolean>;
  maxAttempts?: number;
}): Promise<string> {
  const maxAttempts = opts.maxAttempts ?? 50;
  const normalizedBase = slugify(opts.base) || "item";

  let candidate = normalizedBase;
  for (let i = 0; i < maxAttempts; i++) {
    // First try the base, then base-2, base-3, ...
    candidate = i === 0 ? normalizedBase : `${normalizedBase}-${i + 1}`;
    // eslint-disable-next-line no-await-in-loop
    const taken = await opts.isTaken(candidate);
    if (!taken) return candidate;
  }

  // Last resort: append timestamp to avoid collisions
  return `${normalizedBase}-${Date.now()}`;
}