export type StoreCreateForm = {
  partnerAccountId: string;
  cityId: string;
  regionCodes?: string[];
  province?: string;
  city?: string;
  district: string;
  districtCode?: string;
  categoryParentId?: string;
  categoryId: string;
  name: string;
  phone: string;
  address: string;
  latitude?: number | null;
  longitude?: number | null;
  intro?: string;
  benefitUsageRule?: string;
  openTime?: string;
  closeTime?: string;
  openTime2?: string;
  closeTime2?: string;
  avgPrice?: number | null;
  coverUrl?: string;
  envPhotoUrls?: string[];
  contractUrl?: string;
  bankAccountName: string;
  bankAccountNo: string;
  bankBranch: string;
  settlementRate?: number;
  visibilityWhitelistEnabled?: boolean;
  visibilityPhones?: string[];
};

const PHONE_RE = /^1\d{10}$/;
const BANK_RE = /^\d{16,19}$/;
const TIME_RE = /^([01]\d|2[0-3]):([0-5]\d)$/;

function timeToMinutes(hhmm: string): number {
  const [h, m] = hhmm.split(':').map(Number);
  return h * 60 + m;
}

export function validateStoreCreateStep1(
  form: Pick<
    StoreCreateForm,
    | 'partnerAccountId'
    | 'cityId'
    | 'regionCodes'
    | 'categoryId'
    | 'name'
    | 'phone'
    | 'address'
    | 'intro'
    | 'benefitUsageRule'
    | 'openTime'
    | 'closeTime'
    | 'openTime2'
    | 'closeTime2'
    | 'avgPrice'
  >,
): 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.categoryId?.trim()) return '请选择门店分类（细类）';
  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';

  const openTime = String(form.openTime || '').trim();
  const closeTime = String(form.closeTime || '').trim();
  if (!openTime || !closeTime) return '请填写营业时间';
  if (!TIME_RE.test(openTime) || !TIME_RE.test(closeTime)) return '营业时间格式须为 HH:MM';
  if (timeToMinutes(openTime) >= timeToMinutes(closeTime)) return '营业结束时间须晚于开始时间';

  const openTime2 = String(form.openTime2 || '').trim();
  const closeTime2 = String(form.closeTime2 || '').trim();
  if (openTime2 || closeTime2) {
    if (!openTime2 || !closeTime2) return '请完整填写第二段营业时间';
    if (!TIME_RE.test(openTime2) || !TIME_RE.test(closeTime2)) return '第二段时间格式须为 HH:MM';
    if (timeToMinutes(openTime2) >= timeToMinutes(closeTime2)) return '第二段结束时间须晚于开始时间';
    if (timeToMinutes(closeTime) >= timeToMinutes(openTime2)) return '第二段开始时间须晚于第一段结束时间';
  }

  if (form.avgPrice != null && String(form.avgPrice).trim() !== '') {
    const n = Number(form.avgPrice);
    if (Number.isNaN(n) || n < 0) return '人均费用须为非负数字';
  }

  if (form.intro?.trim()) {
    const len = form.intro.trim().length;
    if (len < 2 || len > 500) return '门店简介须为 2~500 字';
  }
  if (form.benefitUsageRule?.trim() && form.benefitUsageRule.trim().length > 1000) {
    return '好客权益券使用规则最多 1000 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;
}