import { $ } from '@utils';
import axios from 'axios';

export default () => {
  const buttonLoadMore = $('.load-more-news');
  const newsGrid = $('.grid-news');
  const newsLoader = $('.news__loader');

  if (buttonLoadMore) {
    buttonLoadMore.addEventListener('click', function (e){
      e.preventDefault();
      newsLoader.style.display = 'flex';
      let linkArticles = e.target.dataset.href + e.target.dataset.page;
      let posTop = (window.pageYOffset !== undefined) ? window.pageYOffset : (document.documentElement || document.body.parentNode || document.body).scrollTop;
      axios.get(linkArticles)
        .then(function (response) {
          const dom = new DOMParser().parseFromString(response.data, "text/html");
          const elements = dom.querySelectorAll('.cardset__item');
          elements.forEach((elem) => {
            newsGrid.append(elem);
          });
          newsLoader.style.display = 'none';
          if (newsGrid.querySelectorAll('.cardset__item').length == e.target.dataset.total) {
            buttonLoadMore.style.display = 'none';
          } else {
            e.target.dataset.page = parseInt(e.target.dataset.page) + 1;
          }
          window.scrollTo(0, posTop);
        })
        .catch(function (error) {
          alert('Ой, что-то пошло не так..');
        });
    });
  }
};