import { toBottleQuantity } from '@dukang/domain';

const GOODS_NAME_MAX_LEN = 128;

export type XfxGoodsInput = {
  productName: string;
  /** SKU 规格快照，如「单瓶 / 整箱」 */
  productSpec?: string | null;
  /** SPU 物理规格，如「500ml | 53度」 */
  physicalSpec?: string | null;
  quantity: number;
  bottlesPerUnit: number;
};

export type XfxGoodsPayload = {
  goodsName: string;
  goodsNum: number;
};

/** 小飞侠创建运单货品：品名+酒精度规格，件数用瓶当量 */
export function buildXfxGoodsPayload(input: XfxGoodsInput): XfxGoodsPayload {
  const perUnit = input.bottlesPerUnit > 0 ? input.bottlesPerUnit : 1;
  return {
    goodsName: buildXfxGoodsName(input),
    goodsNum: toBottleQuantity(input.quantity, perUnit),
  };
}

function buildXfxGoodsName(input: XfxGoodsInput): string {
  const name = trimSpec(input.productName);
  const physical = trimSpec(input.physicalSpec);
  const skuSpec = trimSpec(input.productSpec);

  const parts: string[] = [];
  if (name) parts.push(name);

  if (physical) {
    parts.push(physical);
    if (skuSpec && !isRedundantSpec(physical, skuSpec)) {
      parts.push(skuSpec);
    }
  } else if (skuSpec) {
    parts.push(skuSpec);
  }

  return parts.join(' ').replace(/\s+/g, ' ').trim().slice(0, GOODS_NAME_MAX_LEN);
}

function trimSpec(raw?: string | null): string {
  return (raw ?? '').trim();
}

function isRedundantSpec(physical: string, skuSpec: string): boolean {
  const a = physical.replace(/\s+/g, '');
  const b = skuSpec.replace(/\s+/g, '');
  if (!b || a === b) return true;
  return a.includes(b) || b.includes(a);
}