/**
 * Скрипт для парсинга значков Steam
 * @version 1.0.0
 * @license Unlicense
 * @author Alexander Popov <iiiypuk@fastmail.fm>
 */

/**
 * Получает данные из элемента `div.badge_row`
 * @param {Array} value - div.badge_row
 * @returns {Object}
 */
function getData(value) {
  /*
   * Sctruct of Badge
   * id:          int - steam app id
   * url:         str - game url in store
   * card_url:    str - card page url
   * name:        str - steam app name
   * dropLeft:    int - cards left drops
   */

  // check left cards
  // для карточек, у которых нет параметра 'карточек выпадет'
  let cardsDropLeft = 0;
  if (value.getElementsByClassName('progress_info_bold').length > 0) {
    cardsDropsNumber = value.getElementsByClassName('progress_info_bold')[0].innerText.match(/\d/g);
    if (cardsDropsNumber !== null) { cardsDropLeft = [0]; }
  }

  let badgeItem = {
    id: parseInt(value.childNodes[1].href.split('/')[6]),
    url: `https://store.steampowered.com/app/${value.childNodes[1].href.split('/')[6]}/`,
    card_url: value.childNodes[1].href,
    name: value.getElementsByClassName('badge_title')[0].childNodes[0].textContent.replace(/[\r\n\t]/g, '').trim(),
    dropLeft: parseInt(cardsDropLeft),
  };

  return badgeItem;
}

/**
 * Преобразовывает массив данных в JSON и возвращает к консоль
 * @param {Array} badgesArray - массив данных о значках
 */
function exportJson(badgesArray) {
  const byteSize = str => new Blob([str]).size;

  json = JSON.stringify(badgesArray);
  console.log(json);
  console.log(`Total records: ${badgesArray.length}.`);
  console.log(`Size: ${byteSize(json)} bytes.`)
}

/**
 * Функция main()
 */
function getBadges() {
  let badges = [];
  let currentPage = 1;

  // get total pages
  const [baseURI, totalPages] = (function(element) {
    return [
      element[0].baseURI,
      element[element.length - 1].text
    ];
  })(document.getElementsByClassName('pagelink'));

  while (currentPage <= totalPages) {
    fetch(`${baseURI}?p=${currentPage}`)
      .then((response) => { return response.text(); })
      .then((html) => {
        let parser = new DOMParser();
        let doc = parser.parseFromString(html, 'text/html');
        const collection = doc.getElementsByClassName('badge_row');

        for (const value of Object.entries(collection)) {
          badges.push(getData(value[1]));
        }
      })
      .catch((err) => console.warn('Something went wrong.', err));

    currentPage++;
  }

  setTimeout(() => { exportJson(badges); }, 10000); // FIX IT
}

getBadges();