{{- /*
  Hydrates [data-nightly-tag] spans on the install page with the latest
  nightly tag + date for each repo (data-repo). Data is fetched from the
  unauthenticated GitHub API and cached in localStorage so the docs stay
  fresh without needing a rebuild.
*/ -}}
<script>
(function () {
  var TTL = 6 * 60 * 60 * 1000; // 6h
  var KEY = "goreleaser:install-nightlies:v1";
  var DATE_OPTS = { year: "numeric", month: "long", day: "numeric" };

  function loadCache() {
    try { return JSON.parse(localStorage.getItem(KEY)) || {}; } catch (e) { return {}; }
  }
  function saveCache(c) {
    try { localStorage.setItem(KEY, JSON.stringify(c)); } catch (e) {}
  }

  function pickNightly(releases) {
    for (var i = 0; i < releases.length; i++) {
      var r = releases[i];
      if (r.draft) continue;
      if (r.prerelease && /-nightly$/.test(r.tag_name)) {
        return { tag: r.tag_name, date: r.published_at, url: r.html_url };
      }
    }
    return null;
  }

  function render(el, nightly) {
    if (!nightly) {
      el.textContent = "unavailable";
      return;
    }
    var date = new Date(nightly.date).toLocaleDateString(undefined, DATE_OPTS);
    el.innerHTML = '';
    var code = document.createElement('code');
    code.textContent = nightly.tag;
    el.appendChild(code);
    el.appendChild(document.createTextNode(' (' + date + ')'));
  }

  function fetchRepo(repo) {
    return fetch("https://api.github.com/repos/" + repo + "/releases?per_page=30", {
      headers: { "Accept": "application/vnd.github+json" },
    }).then(function (r) {
      if (!r.ok) throw new Error("github api: " + r.status);
      return r.json();
    }).then(pickNightly);
  }

  var spans = document.querySelectorAll("[data-nightly-tag]");
  if (!spans.length) return;
  var cache = loadCache();
  var now = Date.now();

  spans.forEach(function (el) {
    var repo = el.getAttribute("data-repo");
    if (!repo) return;
    var entry = cache[repo];
    if (entry && entry.fetched && (now - entry.fetched) < TTL && entry.data) {
      render(el, entry.data);
      return;
    }
    fetchRepo(repo).then(function (data) {
      render(el, data);
      cache[repo] = { fetched: Date.now(), data: data };
      saveCache(cache);
    }).catch(function () {
      render(el, entry && entry.data ? entry.data : null);
    });
  });
})();
</script>