/**
 * Answer normalizer: uppercase → strip accents → drop everything except A-Z and 0-9.
 * "20:40" and "20 40" → "2040"; "Fire Swart, Friday!" → "FIRESWARTFRIDAY".
 */
export function normalizeAnswer(input: string): string {
  return String(input)
    .toUpperCase()
    .normalize('NFD')
    .replace(/[̀-ͯ]/g, '')
    .replace(/[^A-Z0-9]/g, '');
}

/** True if the normalized input equals any normalized accepted answer. */
export function matchesAnswer(input: string, answers: readonly string[]): boolean {
  const value = normalizeAnswer(input);
  if (value === '') return false;
  return answers.some((answer) => normalizeAnswer(answer) === value);
}