import type { WorksTokenPointBalance } from './works-billing';

const TOKEN_POINT_VALUE_PATTERN = /^(0|[1-9]\d*)(?:\.(\d{1,2}))?$/u;

export function formatWorksTokenPointValue(value: string | null | undefined): string | null {
  if (typeof value !== 'string') return null;
  const match = TOKEN_POINT_VALUE_PATTERN.exec(value.trim());
  if (!match) return null;

  const whole = match[1].replace(/\B(?=(\d{3})+(?!\d))/gu, ',');
  const fraction = (match[2] ?? '').replace(/0+$/u, '');
  return fraction ? `${whole}.${fraction}` : whole;
}

export function isWorksTokenPointBalanceExhausted(
  balance: WorksTokenPointBalance | null | undefined,
): boolean {
  if (!balance) return false;
  if (balance.family_shared && typeof balance.shared_available === 'boolean') {
    return !balance.shared_available;
  }
  const remaining = formatWorksTokenPointValue(balance.total_remaining);
  return remaining !== null && /^0(?:\.0+)?$/u.test(remaining);
}