import type { StorePackageItemDto } from '@dukang/shared-types';
import { STORE_PACKAGE_MAX_COUNT } from '@dukang/shared-types';

export type PackageFormItem = StorePackageItemDto;

export function emptyPackage(index = 0): PackageFormItem {
  return {
    name: '',
    price: '',
    dishes: '',
    usableTime: '',
    otherNotes: '',
    sortOrder: index,
  };
}

export function normalizePackageFormItems(raw: PackageFormItem[]): PackageFormItem[] {
  return raw
    .map((item, index) => ({
      name: item.name.trim(),
      price: item.price.trim(),
      dishes: item.dishes.trim(),
      usableTime: item.usableTime?.trim() || '',
      otherNotes: item.otherNotes?.trim() || '',
      sortOrder: index,
    }))
    .filter((item) => item.name || item.price || item.dishes || item.usableTime || item.otherNotes);
}

export function validatePackageFormItems(items: PackageFormItem[]): string | null {
  const filled = normalizePackageFormItems(items);
  if (filled.length > STORE_PACKAGE_MAX_COUNT) {
    return `套餐最多 ${STORE_PACKAGE_MAX_COUNT} 条`;
  }
  for (let i = 0; i < filled.length; i++) {
    const item = filled[i];
    if (!item.name) return `第 ${i + 1} 条套餐名称不能为空`;
    const price = Number(item.price);
    if (!Number.isFinite(price) || price < 0) return `第 ${i + 1} 条套餐价格须为非负数字`;
    if (!item.dishes) return `第 ${i + 1} 条套餐菜品不能为空`;
  }
  return null;
}

export function formatPackagePrice(price: string | number) {
  const n = typeof price === 'number' ? price : Number(price);
  if (!Number.isFinite(n)) return String(price);
  return n % 1 === 0 ? String(n) : n.toFixed(2);
}