const fetch = require("node-fetch");

// implemented from: https://github.com/HackerNews/API

const HN_PREFIX = "https://hacker-news.firebaseio.com/v0/";

const TOP_STORIES = "topstories";
const ITEM = "item";

function hnFetch(type, id = "") {
  const url = id
    ? `${HN_PREFIX}${type}/${id}.json`
    : `${HN_PREFIX}${type}.json`;
  return fetch(url, {
    method: "GET",
    headers: {
      "Content-Type": "application/json"
    }
  })
    .then(res => {
      if (!isStatusOk(res.status)) {
        throw res;
      }
      return res.json();
    })
    .then(res => res)
    .catch(error => console.error(error));
}

function isStatusOk(statusCode) {
  return statusCode === 200 || statusCode === 304;
}
async function main() {
  const storyIds = await hnFetch(TOP_STORIES);
  const stories = await Promise.all(
    storyIds.slice(0, 20).map(storyId => hnFetch(ITEM, storyId))
  );

  console.log(stories.map(story => { delete story.kids; return story; }));
}

main();