export const STORAGE_KEYS = {
  brands: 'pdd_pricing_brand_configs_v1',
};

// 比例类字段默认值（小数存储，页面以百分比展示）
export const PLATFORM_COMMISSION_RATES = Object.freeze({
  standard: 0.015,
  blackLabel: 0.06,
});

export const getPlatformCommissionRate = (isBlackLabelShop) => (
  isBlackLabelShop ? PLATFORM_COMMISSION_RATES.blackLabel : PLATFORM_COMMISSION_RATES.standard
);

export const inferBlackLabelShop = (rows = []) => {
  const commission = rows
    .map((row) => row?.commission ?? row?.savedPricing?.commission)
    .map((value) => toFiniteNumber(value))
    .find((value) => value !== null);
  return commission !== undefined
    && Math.abs(commission - PLATFORM_COMMISSION_RATES.blackLabel) < 1e-9;
};

export const DEFAULT_RATES = {
  commission: PLATFORM_COMMISSION_RATES.standard, // 平台佣金：黑标店铺 6% / 非黑标 1.5%
  adFee: 0.025, // 营销广告费
  seeding: 0.005, // 种菜占比
  afterSale: 0.05, // 售后费用
  insurance: 0.05, // 保险费
  brandFee: 0, // 品牌使用费：默认 0，按条码前缀自动判断（见 deriveBrandFromBarcode）
  targetMargin: 0.15, // 营业利润率（目标值）
};

// 条码前缀规则：GBGJ- 顾家（品牌使用费 7%）、GBSFY- 索菲亚（6%）、其余简尚（0）
export const BARCODE_BRAND_RULES = [
  { prefix: 'GBGJ-', brand: '顾家', brandFee: 0.07 },
  { prefix: 'GBSFY-', brand: '索菲亚', brandFee: 0.06 },
];

export const deriveBrandFromBarcode = (barcode) => {
  const code = String(barcode || '').trim().toUpperCase();
  const matched = BARCODE_BRAND_RULES.find((rule) => code.startsWith(rule.prefix));
  return matched
    ? { brand: matched.brand, brandFee: matched.brandFee }
    : { brand: '简尚', brandFee: 0 };
};

// 系统兜底默认值（运营未保存个性化默认值配置时使用，见 DefaultsConfigModal）
export const SYSTEM_DEFAULTS = {
  coupon: 20, // 优惠券金额
  activityDiscount: 0.6, // 活动折扣（即 6 折）
  installFee: 0, // 安装费
  targetMargin: 0.15, // 营业利润率
};

export const SOURCE_LABELS = {
  getJstSkusBySpu: '聚水潭实时接口',
};

export const formatSourceLabel = (source) => {
  if (!source) return '-';
  return SOURCE_LABELS[source] || `本地快照（${source}）`;
};

export const createRowId = () => `${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;

const toFiniteNumber = (value) => {
  if (value === null || value === undefined || value === '') return null;
  const num = Number(value);
  return Number.isFinite(num) ? num : null;
};

/**
 * 由 SPU 条码行生成测算行：
 * 条码/图片/尺寸/颜色/成本/公司限价自动填入；运费优先取运费画像的全国运费；
 * 售后占比优先取画像值；到手价默认取公司限价（无限价时取成本价的 2 倍，均可改）；
 * 品牌与品牌使用费按条码前缀自动判断（GBGJ- 顾家 7% / GBSFY- 索菲亚 6% / 其余简尚 0）。
 */
export const createRowFromSku = (sku, { freightProfile, defaults, commission } = {}) => {
  const minimumPrices = freightProfile?.minimumPricesBySku || {};
  const freightMinimum = minimumPrices[sku.skuCode]
    ?? minimumPrices[String(sku.skuCode || '').toUpperCase()]
    ?? minimumPrices[String(sku.skuCode || '').toLowerCase()];
  const { brand, brandFee } = deriveBrandFromBarcode(sku.skuCode);
  const priceLimit = toFiniteNumber(freightMinimum ?? sku.minimumPrice);
  const cost = toFiniteNumber(sku.cost);

  return {
    id: createRowId(),
    barcode: sku.skuCode || '',
    skuStatus: sku.status || '',
    stock: toFiniteNumber(sku.stock),
    stockWarehouses: Array.isArray(sku.stockWarehouses) ? sku.stockWarehouses : [],
    originalSkuName: sku.savedPricing?.originalSkuName || sku.name || '',
    selectedSkuName: sku.savedPricing?.selectedSkuName || sku.name || '',
    name: sku.savedPricing?.selectedSkuName || sku.name || '',
    internalProductCode: sku.savedPricing?.internalProductCode || '',
    productCodeProductName: sku.savedPricing?.productCodeProductName || '',
    productCodeColorSpec: sku.savedPricing?.productCodeColorSpec || '',
    imageUrl: sku.image || '',
    size: sku.size || '',
    color: sku.color || '',
    supplier: sku.supplier || '',
    category: sku.category || '',
    lengthCm: toFiniteNumber(sku.lengthCm),
    widthCm: toFiniteNumber(sku.widthCm),
    heightCm: toFiniteNumber(sku.heightCm),
    weight: toFiniteNumber(sku.weight),
    brand,
    companyPriceLimit: priceLimit,
    salePrice: toFiniteNumber(sku.salePrice),
    price: toFiniteNumber(sku.savedPricing?.price)
      ?? toFiniteNumber(sku.savedPricing?.groupPrice) // 早期自动上架只存了拼单价，兜底还原为到手价
      ?? priceLimit
      ?? (cost === null ? null : cost * 2), // L 到手价（默认取公司限价，无限价时取成本价的 2 倍，可改）
    // 默认值优先级：选品已存价 > 用户个性化配置 > 系统默认（券 20 / 折扣 0.6 / 安装费 0 / 利润率 15%）
    installFee: toFiniteNumber(sku.savedPricing?.installFee) ?? toFiniteNumber(defaults?.installFee) ?? 0,
    coupon: toFiniteNumber(sku.savedPricing?.coupon) ?? toFiniteNumber(defaults?.coupon) ?? 20,
    activityDiscount: toFiniteNumber(sku.savedPricing?.activityDiscount) ?? toFiniteNumber(defaults?.activityDiscount) ?? 0.6,
    cost, // N 成本
    // O 运费：优先取接口按条码返回的全国平均运费（qgyf），其次运费画像的全国运费
    shipping: toFiniteNumber(sku.savedPricing?.shipping)
      ?? toFiniteNumber(sku.freight)
      ?? toFiniteNumber(freightProfile?.nationalFreight),
    ...DEFAULT_RATES,
    commission: toFiniteNumber(commission)
      ?? toFiniteNumber(sku.savedPricing?.commission)
      ?? DEFAULT_RATES.commission,
    adFee: toFiniteNumber(sku.savedPricing?.adFee) ?? DEFAULT_RATES.adFee,
    seeding: toFiniteNumber(sku.savedPricing?.seeding) ?? DEFAULT_RATES.seeding,
    afterSale: toFiniteNumber(sku.savedPricing?.afterSale) ?? DEFAULT_RATES.afterSale,
    insurance: toFiniteNumber(sku.savedPricing?.insurance) ?? DEFAULT_RATES.insurance,
    targetMargin: toFiniteNumber(sku.savedPricing?.targetMargin) ?? toFiniteNumber(defaults?.targetMargin) ?? DEFAULT_RATES.targetMargin,
    brandFee: toFiniteNumber(sku.savedPricing?.brandFee) ?? brandFee,
  };
};