import type { PartnerProxyDeliveryMode } from '@dukang/shared-types';

const PROXY_ORDER_DRAFT_KEY = 'partner_proxy_order_draft_v2';

export type ProxyOrderDraft = {
  phone: string;
  receiverName: string;
  regionCodes: string[];
  addressDetail: string;
  productId: string;
  quantity: number;
  promoCodeId: string;
  deliveryMode: PartnerProxyDeliveryMode;
  autoReceive: boolean;
};

export function saveProxyOrderDraft(draft: ProxyOrderDraft) {
  try {
    sessionStorage.setItem(PROXY_ORDER_DRAFT_KEY, JSON.stringify(draft));
  } catch {
    /* ignore quota / private mode */
  }
}

export function loadProxyOrderDraft(): ProxyOrderDraft | null {
  try {
    const raw = sessionStorage.getItem(PROXY_ORDER_DRAFT_KEY);
    if (!raw) return null;
    const parsed = JSON.parse(raw) as Partial<ProxyOrderDraft>;
    if (!parsed || typeof parsed !== 'object') return null;
    return {
      phone: typeof parsed.phone === 'string' ? parsed.phone : '',
      receiverName: typeof parsed.receiverName === 'string' ? parsed.receiverName : '',
      regionCodes: Array.isArray(parsed.regionCodes)
        ? parsed.regionCodes.filter((c): c is string => typeof c === 'string')
        : [],
      addressDetail: typeof parsed.addressDetail === 'string' ? parsed.addressDetail : '',
      productId: typeof parsed.productId === 'string' ? parsed.productId : '',
      quantity: typeof parsed.quantity === 'number' && parsed.quantity >= 1 ? parsed.quantity : 2,
      promoCodeId: typeof parsed.promoCodeId === 'string' ? parsed.promoCodeId : '',
      deliveryMode: parsed.deliveryMode === 'ON_SITE_PICKUP' ? 'ON_SITE_PICKUP' : 'ADDRESS',
      autoReceive: parsed.autoReceive === true,
    };
  } catch {
    return null;
  }
}

export function clearProxyOrderDraft() {
  try {
    sessionStorage.removeItem(PROXY_ORDER_DRAFT_KEY);
    sessionStorage.removeItem('partner_proxy_order_draft_v1');
  } catch {
    /* ignore */
  }
}