import { cache } from 'react';

import { listProductTypes } from "@lib/data/products";
import { listRegions } from '@lib/data/regions';
import { getProductCategories } from '@lib/data/categories';

async function countryCodesLoader() {
  const countryCodes = await listRegions().then((regions) =>
    regions?.map((r) => r.countries?.map((c) => c.iso_2)).flat(),
  );
  return countryCodes ?? [];
}
export const loadCountryCodes = cache(countryCodesLoader);

async function productCategoriesLoader() {
  const productCategories = await getProductCategories({ fields: "*products, *products.variants" });
  return productCategories.product_categories ?? [];
}
export const loadProductCategories = cache(productCategoriesLoader);

async function productTypesLoader() {
  const { productTypes } = await listProductTypes();
  return productTypes ?? [];
}
export const loadProductTypes = cache(productTypesLoader);

async function analysesLoader() {
  const [countryCodes, productCategories] = await Promise.all([
    loadCountryCodes(),
    loadProductCategories(),
  ]);  
  const countryCode = countryCodes[0]!;

  const category = productCategories.find(({ metadata }) => metadata?.page === 'order-analysis');

  return {
    analyses: category?.products ?? [],
    countryCode,
  }
}
export const loadAnalyses = cache(analysesLoader);