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/**
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* MotherShip 登录态官网硬约束（与 dashboard Create shipment 对齐）
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*/
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export const MOTHERSHIP_MAX_WEIGHT_EACH_LB = 5000;
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/** YYYY-MM-DD → 本地 noon 解析，避免 UTC 偏移改星期 */
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export function parseIsoDateLocal(iso: string): Date | null {
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const m = /^(\d{4})-(\d{2})-(\d{2})$/.exec(iso.trim());
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if (!m) return null;
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const d = new Date(Number(m[1]), Number(m[2]) - 1, Number(m[3]), 12, 0, 0);
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return Number.isNaN(d.getTime()) ? null : d;
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}
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export function toIsoDateLocal(d: Date): string {
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const yyyy = d.getFullYear();
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const mm = String(d.getMonth() + 1).padStart(2, "0");
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const dd = String(d.getDate()).padStart(2, "0");
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return `${yyyy}-${mm}-${dd}`;
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}
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/** 周六=6 / 周日=0 不可选 */
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export function isMothershipWeekendIso(iso: string): boolean {
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const d = parseIsoDateLocal(iso);
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if (!d) return false;
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const day = d.getDay();
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return day === 0 || day === 6;
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}
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/** 若落在周末，拨到下一工作日（周一） */
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export function snapMothershipReadyDateToWeekday(iso: string): string {
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const d = parseIsoDateLocal(iso);
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if (!d) return iso;
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const day = d.getDay();
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if (day === 6) d.setDate(d.getDate() + 2);
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else if (day === 0) d.setDate(d.getDate() + 1);
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return toIsoDateLocal(d);
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}
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/** 今天 YYYY-MM-DD（本地） */
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export function todayIsoDateLocal(): string {
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return toIsoDateLocal(new Date());
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}
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/** 默认可提货日：今天若为周末则拨到周一 */
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export function defaultMothershipReadyDateIso(): string {
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return snapMothershipReadyDateToWeekday(todayIsoDateLocal());
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}
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/** date input min：与官网一致，不可早于最近工作日 */
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export function minMothershipReadyDateIso(): string {
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return defaultMothershipReadyDateIso();
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}
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/** 所有 MotherShip 日期字段统一规范化 */
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export function normalizeMothershipReadyDateIso(iso: string | undefined): string | undefined {
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const trimmed = iso?.trim();
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if (!trimmed) return undefined;
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return snapMothershipReadyDateToWeekday(trimmed);
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}
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/** 单件重量（Weight each）不得超过 5000 lb */
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export function isMothershipWeightEachAllowed(weightEachLb: number): boolean {
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return (
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Number.isFinite(weightEachLb) &&
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weightEachLb > 0 &&
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weightEachLb <= MOTHERSHIP_MAX_WEIGHT_EACH_LB
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);
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}
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