export function normalizeDigits(text: string): string {
  return text.replace(/\D/g, '');
}

export function formatPhone(phone: string): string {
  if (phone.length === 0) return '';
  if (phone.length <= 2) return phone;
  if (phone.length <= 5) return `${phone.slice(0, 2)} ${phone.slice(2)}`;
  if (phone.length <= 7) return `${phone.slice(0, 2)} ${phone.slice(2, 5)} ${phone.slice(5)}`;
  return `${phone.slice(0, 2)} ${phone.slice(2, 5)} ${phone.slice(5, 7)} ${phone.slice(7, 9)}`;
}

export function formatNumber(phone: string): string {
  let digits = normalizeDigits(phone);
  if (!digits) return '';

  // Agar 998 bilan kelsa, olib tashlaymiz
  if (digits.startsWith('998')) {
    digits = digits.slice(3);
  }

  let formatted = '+998 ';

  // operator kodi (XX)
  if (digits.length >= 2) {
    formatted += digits.slice(0, 2) + ' ';
  } else {
    return formatted + digits;
  }

  // 3 ta raqam
  if (digits.length >= 5) {
    formatted += digits.slice(2, 5) + '-';
  } else {
    return formatted + digits.slice(2);
  }

  // 2 ta raqam
  if (digits.length >= 7) {
    formatted += digits.slice(5, 7) + '-';
  } else {
    return formatted + digits.slice(5);
  }

  // oxirgi 2 ta raqam
  formatted += digits.slice(7, 9);

  return formatted;
}