---
import { site, platforms } from "../data/site";
import { getRelease } from "../data/release";

const { repo, releasesUrl } = site;
const { urls, version } = await getRelease();
const matches = Object.fromEntries(platforms.map((p) => [p.id, p.match]));
---

<script define:vars={{ repo, releasesUrl, urls, version, matches }}>
  const LABELS = { mac: "macOS", windows: "Windows", linux: "Linux" };

  function detectOS() {
    const ua = navigator.userAgent;
    const plat = ((navigator.userAgentData && navigator.userAgentData.platform) || navigator.platform || "").toLowerCase();
    if (/mac|iphone|ipad|ipod/i.test(ua) || plat.includes("mac")) return "mac";
    if (/win/i.test(ua) || plat.includes("win")) return "windows";
    if (/linux|x11|cros/i.test(ua) || plat.includes("linux")) return "linux";
    return "mac";
  }

  function pickAsset(assets, os) {
    for (const sfx of matches[os] || []) {
      const hit = assets.find((a) => a.name.toLowerCase().endsWith(sfx.toLowerCase()));
      if (hit) return hit.browser_download_url;
    }
    return null;
  }

  function apply(map, ver) {
    const os = detectOS();
    document.querySelectorAll("[data-download]").forEach((el) => {
      const label = el.querySelector("[data-dl-label]");
      if (label) label.textContent = "Download for " + LABELS[os];
      if (map[os]) el.href = map[os];
    });
    document.querySelectorAll("[data-download-os]").forEach((el) => {
      const url = map[el.dataset.downloadOs];
      if (url) el.href = url;
    });
    document.querySelectorAll(".dl__os [data-download-os]").forEach((el) => {
      if (el.dataset.downloadOs === os) el.remove();
    });
    if (ver) document.querySelectorAll("[data-version]").forEach((el) => (el.textContent = ver));
  }

  apply(urls, version);

  (async () => {
    try {
      const res = await fetch(`https://api.github.com/repos/${repo}/releases/latest`, {
        headers: { Accept: "application/vnd.github+json" },
      });
      if (!res.ok) return;
      const data = await res.json();
      const assets = data.assets || [];
      const fresh = {};
      for (const os of Object.keys(matches)) fresh[os] = pickAsset(assets, os) || urls[os] || releasesUrl;
      apply(fresh, data.tag_name || version);
    } catch (e) {
      /* keep the build-time links */
    }
  })();
</script>