export type StoreCreateForm = {
  partnerAccountId: string;
  cityId: string;
  regionCodes?: string[];
  province?: string;
  city?: string;
  district: string;
  districtCode?: string;
  name: string;
  phone: string;
  address: string;
  intro?: string;
  coverUrl?: string;
  envPhotoUrls?: string[];
  contractUrl?: string;
  bankAccountName: string;
  bankAccountNo: string;
  bankBranch: string;
  settlementRate?: number;
};

const PHONE_RE = /^1\d{10}$/;
const BANK_RE = /^\d{16,19}$/;

export function validateStoreCreateStep1(
  form: Pick<StoreCreateForm, 'partnerAccountId' | 'cityId' | 'regionCodes' | 'name' | 'phone' | 'address' | 'intro'>,
): string | null {
  if (!form.partnerAccountId) return '请选择开城合伙人';
  if (!form.regionCodes || form.regionCodes.length < 3) return '请选择省 / 市 / 区县';
  if (!form.cityId) return '所选地区未匹配到开城城市，请先在「开城 → 城市」配置对应区划';
  if (!form.name?.trim()) return '请填写门店名称';
  if (!form.phone?.trim()) return '请填写门店手机号';
  if (!PHONE_RE.test(form.phone.trim())) return '门店手机号须为11位手机号';
  if (!form.address?.trim()) return '请填写详细地址';
  if (form.intro?.trim()) {
    const len = form.intro.trim().length;
    if (len < 10 || len > 500) return '门店简介须为 10~500 字';
  }
  return null;
}

export function validateStoreCreateStep3(form: Pick<StoreCreateForm, 'bankAccountName' | 'bankAccountNo' | 'bankBranch'>): string | null {
  if (!form.bankAccountName?.trim()) return '请填写户主姓名';
  if (!form.bankAccountNo?.trim()) return '请填写银行卡号';
  if (!BANK_RE.test(form.bankAccountNo.replace(/\s/g, ''))) return '银行卡号须为 16~19 位数字';
  if (!form.bankBranch?.trim()) return '请填写开户支行';
  return null;
}