import { GraphQLError } from "graphql";

import type { GraphQLContext } from "~/context";
import { fetchPopularTitlesFromAnilist } from "~/services/popular/category/anilist";
import type { PopularCategory } from "~/services/popular/category/enum";

interface PopularByCategoryArgs {
  category: PopularCategory;
  page?: number;
  limit?: number;
}

export async function popularByCategory(
  _parent: unknown,
  args: PopularByCategoryArgs,
  _context: GraphQLContext,
) {
  const { category, page = 1, limit = 10 } = args;

  const response = await fetchPopularTitlesFromAnilist(category, page, limit);

  if (!response) {
    throw new GraphQLError(`Failed to fetch ${category} titles`, {
      extensions: { code: "INTERNAL_SERVER_ERROR" },
    });
  }

  return {
    results: response.results || [],
    hasNextPage: response.hasNextPage ?? false,
  };
}