import { IHowTo } from './howTo.types';
import { directus } from '@/plugins/axios/';

import { ICategory, IParamsDirectus } from '@/database/baseTypes';
import { POST_STATUS } from '@/utils/constants';

const postPreviewFields =
  'title,slug,category.*,preview.*,previewBackgroundColor,readTime,date_created';

async function getPost({
  slug,
  categorySlug,
}: IHowTo.GetPostsParams): Promise<IHowTo.Post> {
  const params: IParamsDirectus = {
    fields: '*.*.*.*',
    filter: {
      status: POST_STATUS.published,
    },
  };

  if (slug)
    params.filter = {
      ...params.filter,
      slug,
    };
  if (categorySlug)
    params.filter = {
      ...params.filter,
      ...{
        category: {
          slug: categorySlug,
        },
      },
    };

  const { data: posts } = await directus.get<IHowTo.Post[]>('how-tos', {
    params,
  });

  const [post] = posts.data;

  return post;
}

async function getPostsPreview({
  start,
  categorySlug,
  limit,
}: IHowTo.GetPostsParams): Promise<IHowTo.PostPreview[]> {
  const params: IParamsDirectus = {
    fields: postPreviewFields,
    filter: {
      status: POST_STATUS.published,
    },
  };

  if (start) params.offset = start;
  if (limit) params.limit = limit;
  if (categorySlug)
    params.filter = {
      ...params.filter,
      ...{
        category: {
          slug: categorySlug,
        },
      },
    };

  const { data: posts } = await directus.get<IHowTo.PostPreview[]>('how-tos', {
    params,
  });

  return posts.data;
}

async function getCategories(): Promise<ICategory[]> {
  const params: IParamsDirectus = {
    sort: 'name',
    fields: '*.*',
  };

  const { data: categories } = await directus.get<ICategory[]>(
    'how-to-categories',
    { params },
  );

  return categories.data;
}

export const HowToGateway = {
  getCategories,
  getPostsPreview,
  getPost,
};