export type HydrogenCustomerKind = 'external' | 'lingniu' | 'all';

export function parseHydrogenCustomerKind(value: string | undefined): HydrogenCustomerKind {
  if (value === 'external' || value === 'all') return value;
  return 'lingniu';
}

export function parseHydrogenStationId(value: string | undefined): number | null {
  if (value == null || !/^\d+$/.test(value)) return null;
  const parsed = Number(value);
  return Number.isSafeInteger(parsed) && parsed >= 0 ? parsed : null;
}