export function isFreightFeeName(name) {
  const text = String(name || '');
  return text.includes('运费') || text.includes('运输费');
}

function parseBillingRules(row = {}) {
  const rule = row.billingRule || {};
  const nested = Array.isArray(rule.rules) ? rule.rules : [];
  if (nested.length) return nested;
  const raw = row.billingRulesJson ?? row.billingRules;
  if (Array.isArray(raw)) return raw.filter(item => item && typeof item === 'object');
  if (typeof raw === 'string' && raw.trim()) {
    try {
      const parsed = JSON.parse(raw);
      return Array.isArray(parsed) ? parsed.filter(item => item && typeof item === 'object') : [];
    } catch (error) {
      return [];
    }
  }
  return [];
}

/** 运输单价对应的运费计费类型。 */
export function freightBillingType(row = {}) {
  const rule = row.billingRule || {};
  const rules = parseBillingRules(row);
  const freightRule = rules.find(
    item => isFreightFeeName(item?.feeItem) || isFreightFeeName(item?.feeType)
  );
  return freightRule?.billingType || row.billingType || rule.billingType || '';
}

export function isTierUnitPrice(row) {
  return freightBillingType(row) === '阶梯单价';
}

export function isIntervalBilling(row) {
  const type = freightBillingType(row);
  return type === '区间单价' || (type.includes('区间') && type.includes('一口价'));
}

/** 阶梯单价、区间单价、区间一口价的运输单价不开放手工调整。 */
export function isUnitPriceAdjustable(row) {
  const type = freightBillingType(row);
  if (!type) return true;
  return !isTierUnitPrice(row) && !isIntervalBilling(row);
}