import { p1DateFromIso, p1DateToIso } from "@/lib/priority1/date-format";

/** 提货日最早可选：明天（不含今天） */
export function minPickupDateIso(): string {
  const d = new Date();
  d.setHours(12, 0, 0, 0);
  d.setDate(d.getDate() + 1);
  const y = d.getFullYear();
  const m = String(d.getMonth() + 1).padStart(2, "0");
  const day = String(d.getDate()).padStart(2, "0");
  return `${y}-${m}-${day}`;
}

/** MM/DD/YYYY 形式的最早可选提货日 */
export function minPickupDateDisplay(): string {
  return p1DateFromIso(minPickupDateIso());
}

/** 提货日须严格晚于今天（按日历日比较，避免时区边界误判） */
export function isPickupDateAfterToday(display: string): boolean {
  const iso = p1DateToIso(display.trim());
  if (!iso) return false;
  return iso >= minPickupDateIso();
}

export function pickupDateValidationMessage(display: string): string | null {
  if (!/^\d{2}\/\d{2}\/\d{4}$/.test(display.trim())) {
    return "请选择提货日";
  }
  if (!isPickupDateAfterToday(display)) {
    return "提货日须晚于今天";
  }
  return null;
}