const axios = require("axios");
const HTMLParser = require("node-html-parser");

exports.getCanonical = function (item, today) {
  return {
    id: item.id,
    name: item.name,
    price: item.price,
    priceHistory: [{ date: today, price: item.price }],
    unit: item.unit,
    bio: item.name.toLowerCase().includes('bio'),
    url: `https://shop.unimarkt.at${item.canonicalUrl}`,
  };
};

exports.fetchData = async function () {
  const UNIMARKT_BASE_URL = `https://shop.unimarkt.at/`;
  const UNIMARKT_MAIN_CATEGORIES = [
    "obst-gemuese",
    "kuehlprodukte",
    "fleisch-wurst",
    "brot-gebaeck",
    "getraenke",
    "lebensmittel",
    "suesses-snacks",
  ];

  let unimarktItems = [];
  for (let category of UNIMARKT_MAIN_CATEGORIES) {
    var res = await axios.get(UNIMARKT_BASE_URL + category, {
      validateStatus: function (status) {
        return (status >= 200 && status < 300);
      },
    });

    if (res && res.data) {
      var root = HTMLParser.parse(res.data);

      root
        .querySelectorAll(".articleListItem .produktContainer")
        .forEach((product) => {
          unimarktItems.push({
            id: product._attrs["data-articleid"],
            name: product.querySelector(".name").text,
            price: parseFloat(product._attrs["data-price"]),
            unit: product.querySelector(".grammatur").text,
            canonicalUrl: product.querySelector(".image > a")._attrs["href"],
          });
        });
    }
  }
  return unimarktItems;
};