<header>
  <h1>Tag Cloud</h1>
</header>

<main>
  <ul class="tags"></ul>
</main>

<footer>
  <p>Created by <a href="https://mark.ie">Mark Conroy</a>.</p>
</footer>

.tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 960px;
  margin: auto;
  padding: 2rem 0 1rem;
  list-style: none;
  border: 2px solid white;
  border-radius: 5px;
}

.tag {
  display: flex;
  align-items: center;
  margin: 0.25rem 1rem;
}

.tag__link {
  padding: 5px 5px 0;
  transition: 0.3s;
  text-decoration: none;
}

/* Beautiful colour scheme unashamedly stolen from ChrisCoyier.net! */
.tag:nth-of-type(4n+1) .tag__link {
  color: #ffd560;
}
.tag:nth-of-type(4n+2) .tag__link {
  color: #ee4266;
}
.tag:nth-of-type(4n+3) .tag__link {
  color: #9e88f7;
}
.tag:nth-of-type(4n+4) .tag__link {
  color: #54d0ff;
}

.tag:nth-of-type(4n+1) .tag__link:focus,
.tag:nth-of-type(4n+1) .tag__link:hover {
  box-shadow: inset 0 -1.3em 0 0 #ffd560;
}
.tag:nth-of-type(4n+2) .tag__link:focus,
.tag:nth-of-type(4n+2) .tag__link:hover {
  box-shadow: inset 0 -1.3em 0 0 #ee4266;
}
.tag:nth-of-type(4n+3) .tag__link:focus,
.tag:nth-of-type(4n+3) .tag__link:hover {
  box-shadow: inset 0 -1.3em 0 0 #9e88f7;
}
.tag:nth-of-type(4n+4) .tag__link:focus,
.tag:nth-of-type(4n+4) .tag__link:hover {
  box-shadow: inset 0 -1.3em 0 0 #54d0ff;
}

.tag:nth-of-type(4n+1) .tag__link:focus,
.tag:nth-of-type(4n+1) .tag__link:hover,
.tag:nth-of-type(4n+2) .tag__link:focus,
.tag:nth-of-type(4n+2) .tag__link:hover,
.tag:nth-of-type(4n+3) .tag__link:focus,
.tag:nth-of-type(4n+3) .tag__link:hover,
.tag:nth-of-type(4n+4) .tag__link:focus,
.tag:nth-of-type(4n+4) .tag__link:hover {
  color: black;
}

/* Boilerplate CSS, not directly related to the tag cloud. */

body {
  display: flex;
  flex-direction: column;
  max-width: 960px;
  min-height: 100vh;
  margin: auto;
  padding: 0 1rem;
  color: white;
  background-color: #131313;
}

a {
  color: #ffd560;
}

header,
footer {
  font-family: sans-serif;
}

footer {
  margin-top: auto;
  padding: 3rem 0 1rem;
}

const dataURL =
  "https://gist.githubusercontent.com/markconroy/536228ed416a551de8852b74615e55dd/raw/cc3e4082007f1a8f39ce4b2d3569c8735b347f83/tags.json";
const tags = document.querySelector(".tags");
const fragment = document.createDocumentFragment();
const maxFontSizeForTag = 6;

function handleResult(result, highestValue) {
  // Set our variables
  const numberOfArticles = result.tagged_articles.length;
  const name = result.title;
  const link = result.href;
  let fontSize = numberOfArticles / highestValue * maxFontSizeForTag;
  fontSize = +fontSize.toFixed(2);
  
  // Make sure our font size will be at least 1em
  if (fontSize <= 1) {
    fontSize = 1;
  } else {
    fontSize = fontSize;
  }
  const fontSizeProperty = `${fontSize}em`;

  // Then, create a list element for each tag and inline the font size.
  tag = document.createElement("li");
  tag.classList.add("tag");
  tag.innerHTML = `<a class="tag__link" href="${link}" style="font-size: ${fontSizeProperty}">${name} (${numberOfArticles})</a>`;

  // Append each tag to the fragment
  fragment.appendChild(tag);
}

fetch(dataURL)
  .then(function (res) {
    return res.json();
  })
  .then(function (data) {
    // 1. Create a new array from data
    let orderedData = data.map((x) => x);
    // 2. Order it by number of articles each tag has
    orderedData.sort(function(a, b) {
      return a.tagged_articles.length - b.tagged_articles.length;
    });
    orderedData = orderedData.reverse();
    // 3. Get a value for the tag with the most articles
    const highestValue = orderedData[0].tagged_articles.length;
    // 4. Create a list item for each result from data.
    data.forEach((result) => handleResult(result, highestValue));
    // 5. Append all the tags to the tags element.
    // if (data.length > 1) {
      tags.appendChild(fragment);
    // }
  });