import type { IRawCategoryCard } from '../../../types';
import { cleanMiniCategoryCard, getUrlWithProxiedParams, groupObjectsByFirstLetter } from '../../../runtime';

export default defineEventHandler(async (event) => {
  const apiUrl = process.env.NUXT_PUBLIC_API_DOMAIN;
  const url = getUrlWithProxiedParams(`${apiUrl}/v1/categories`, event);

  const categories = await cachedApiFetch<Array<IRawCategoryCard>>(url, event);

  const { letter } = getQuery<{ letter?: string }>(event);

  if (!letter) {
    return [];
  }

  const lang = event.node.req.headers[ 'x-language' ] || 'en';
  const prop = getCategoryProp(lang);

  const filtered = groupObjectsByFirstLetter(categories, prop)[ letter.toUpperCase() ] ?? [];

  return filtered.map(cleanMiniCategoryCard);
});