import { Blog } from '@/payload-types'
import { PaginatedDocs } from 'payload'
import { stringify } from 'qs-esm'

/**
 * Fetches blog posts based on given criteria.
 *
 * @param {boolean} displayOnFrontpage - Indicates whether to display posts on the front page.
 * @returns {Promise<PaginatedDocs<Blog> | undefined>} - A Promise that resolves to the paginated list of blog posts, or undefined if an error occurs.
 */
export const fetchBlogPosts = async (displayOnFrontpage: boolean): Promise<PaginatedDocs<Blog> | undefined> => {
  const today = new Date();
  today.setHours(23, 59);

  const query: any =
    {
      sort: "-date",
      select: {
        title: true,
        date: true,
        photo: true,
        content: displayOnFrontpage ? undefined : true, // hack to fetch content only for the `/blog` page
      },
      where: {
        and: [
          {
            or: [
              {
                "configuration.displayFromDate": {
                  equals: null
                }
              },
              {
                "configuration.displayFromDate": {
                  less_than_equal: today.toISOString(),
                }
              }
            ]
          },
          {
            or: [
              {
                "configuration.displayTillDate": {
                  equals: null
                }
              },
              {
                "configuration.displayTillDate": {
                  greater_than_equal: today.toISOString(),
                }
              }
            ]
          }
        ],
      },
      limit: 18
    };

  if(displayOnFrontpage) {
    query.where.and.push({
      "configuration.showOnFrontpage": {
        equals: true
      },
    })
  }

  const stringifiedQuery = stringify(query, {addQueryPrefix: true})


  const resp = await fetch(`http://localhost:3000/api/blog${stringifiedQuery}`);
  if (!resp.ok) return undefined;
  return resp.json();
}