---
import Win98Window from "./win98window.astro";

const layout = {
  mobile: { left: "2%", top: "60%", width: "96%", height: "auto" },
  desktop: { left: "66%", top: "8%", width: "320px", height: "auto" },
};
---

<Win98Window title="Now Playing" layout={layout}, shown=true>
  <div class="np" id="nowplaying">
    <div class="np-row">
      <div class="np-art" aria-hidden="true">
        <div class="np-art-inner" id="np-art-inner"></div>
      </div>
      <div class="np-meta">
        <div class="np-title" id="np-title">Not connected</div>
        <div class="np-artist" id="np-artist">Spotify</div>
        <div class="np-album" id="np-album"></div>
      </div>
    </div>

    <div class="np-progress">
      <div class="np-time" id="np-time">--:-- / --:--</div>
      <div class="np-bar" role="progressbar" aria-label="track progress">
        <div class="np-bar-fill" id="np-bar-fill"></div>
      </div>
    </div>

    <div class="np-controls">
      <button id="np-open" disabled>Open</button>
      <button id="np-refresh">Refresh</button>
    </div>
  </div>
</Win98Window>

<style>
  .np {
    width: 100%;
    max-width: 100%;
  }

  .np-row {
    display: flex;
    gap: 10px;
    align-items: center;
  }

  .np-art {
    width: 56px;
    height: 56px;
    background: silver;
    box-shadow: inset -1px -1px #0a0a0a, inset 1px 1px #fff, inset -2px -2px grey,
      inset 2px 2px #dfdfdf;
    padding: 3px;
    flex: 0 0 auto;
  }

  .np-art-inner {
    width: 100%;
    height: 100%;
    background: #000;
    background-size: cover;
    background-position: center;
  }

  .np-meta {
    min-width: 0;
    flex: 1 1 auto;
  }

  .np-title {
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .np-artist,
  .np-album {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #222;
  }

  .np-album {
    color: #444;
  }

  .np-progress {
    margin-top: 10px;
  }

  .np-time {
    font-size: 11px;
    margin-bottom: 4px;
  }

  .np-bar {
    height: 14px;
    background: white;
    box-shadow: inset -1px -1px #fff, inset 1px 1px #0a0a0a, inset -2px -2px #dfdfdf,
      inset 2px 2px grey;
    padding: 2px;
  }

  .np-bar-fill {
    height: 100%;
    width: 0%;
    background: navy;
  }

  .np-controls {
    margin-top: 10px;
    display: flex;
    gap: 8px;
  }

  .np-controls button {
    min-width: 80px;
  }

  .np-hint {
    margin-top: 10px;
    font-size: 11px;
    color: #333;
  }
</style>

<script>
  const apiUrl = "/api/spotify/now-playing.json";
  const pollMs = 8000;

  const elTitle = document.getElementById("np-title");
  const elArtist = document.getElementById("np-artist");
  const elAlbum = document.getElementById("np-album");
  const elTime = document.getElementById("np-time");
  const elFill = document.getElementById("np-bar-fill");
  const elArt = document.getElementById("np-art-inner");
  const elHint = document.getElementById("np-hint");
  const btnOpen = document.getElementById("np-open");
  const btnRefresh = document.getElementById("np-refresh");

  let lastTrackUrl = null;
  let timer = null;
  let tickTimer = null;

  let lastKnown = {
    title: null,
    artist: null,
    album: null,
    albumArtUrl: null,
    trackUrl: null,
    durationMs: null,
    stoppedAtMs: null,
    stoppedProgressMs: null,
  };

  let lastProgressMs = null;
  let lastDurationMs = null;
  let lastIsPlaying = false;
  let lastTrackKey = null;
  let lastSyncAt = 0;

  function fmtTime(ms) {
    if (typeof ms !== "number" || !Number.isFinite(ms)) return "--:--";
    const s = Math.max(0, Math.floor(ms / 1000));
    const m = Math.floor(s / 60);
    const r = s % 60;
    return `${m}:${String(r).padStart(2, "0")}`;
  }

  function fmtRelative(tsMs) {
    if (typeof tsMs !== "number" || !Number.isFinite(tsMs)) return "";
    const diffMs = Date.now() - tsMs;
    if (!Number.isFinite(diffMs) || diffMs < 0) return "";

    const sec = Math.floor(diffMs / 1000);
    const min = Math.floor(sec / 60);
    const hr = Math.floor(min / 60);

    try {
      const rtf = new Intl.RelativeTimeFormat(undefined, { numeric: "auto" });
      if (sec < 60) return rtf.format(-sec, "second");
      if (min < 60) return rtf.format(-min, "minute");
      return rtf.format(-hr, "hour");
    } catch {
      if (sec < 60) return `${sec}s ago`;
      if (min < 60) return `${min}m ago`;
      return `${hr}h ago`;
    }
  }

  function setProgress(progressMs, durationMs) {
    if (typeof progressMs !== "number" || typeof durationMs !== "number" || durationMs <= 0) {
      elFill.style.width = "0%";
      elTime.textContent = "--:-- / --:--";
      return;
    }
    const pct = Math.max(0, Math.min(100, (progressMs / durationMs) * 100));
    elFill.style.width = `${pct.toFixed(1)}%`;
    elTime.textContent = `${fmtTime(progressMs)} / ${fmtTime(durationMs)}`;
  }

  function startTicking() {
    if (tickTimer) return;
    tickTimer = setInterval(() => {
      if (!lastIsPlaying) return;
      if (typeof lastProgressMs !== "number" || typeof lastDurationMs !== "number") return;
      const elapsed = Date.now() - lastSyncAt;
      const est = lastProgressMs + elapsed;
      setProgress(est, lastDurationMs);
    }, 250);
  }

  function stopTicking() {
    if (tickTimer) {
      clearInterval(tickTimer);
      tickTimer = null;
    }
  }

  function setArt(url) {
    if (!url) {
      elArt.style.backgroundImage = "none";
      return;
    }
    elArt.style.backgroundImage = `url(${url})`;
  }

  async function refresh() {
    try {
      const res = await fetch(apiUrl, { cache: "no-store" });
      const data = await res.json();

      if (!data || data.isPlaying === false || !data.title) {
        if (lastKnown.title) {
          elTitle.textContent = `Last played: ${lastKnown.title}`;
          elArtist.textContent = lastKnown.artist || "";
          const when = fmtRelative(lastKnown.stoppedAtMs);
          elAlbum.textContent = when
            ? `${lastKnown.album || ""} (${when})`
            : lastKnown.album || "";
          setArt(lastKnown.albumArtUrl);
          setProgress(lastKnown.stoppedProgressMs, lastKnown.durationMs);
          lastTrackUrl = lastKnown.trackUrl;
          if (btnOpen instanceof HTMLButtonElement) btnOpen.disabled = !lastTrackUrl;
        } else {
          elTitle.textContent = "(Nothing playing)";
          elArtist.textContent = "Spotify";
          elAlbum.textContent = "";
          setArt(null);
          setProgress(null, null);
          if (btnOpen instanceof HTMLButtonElement) btnOpen.disabled = true;
          lastTrackUrl = null;
        }

        stopTicking();

        if (lastIsPlaying && lastKnown.title && !lastKnown.stoppedAtMs) {
          lastKnown.stoppedAtMs = Date.now();
          if (typeof lastProgressMs === "number") lastKnown.stoppedProgressMs = lastProgressMs;
        }

        lastIsPlaying = false;
        lastProgressMs = null;
        lastDurationMs = null;
        lastTrackKey = null;
        lastSyncAt = 0;
        elHint.textContent = data?.error ? `Status: ${data.error}` : "";
        return;
      }

      elTitle.textContent = data.title;
      elArtist.textContent = data.artist || "";
      elAlbum.textContent = data.album || "";
      setArt(data.albumArtUrl);

      lastKnown = {
        title: data.title ?? null,
        artist: data.artist ?? null,
        album: data.album ?? null,
        albumArtUrl: data.albumArtUrl ?? null,
        trackUrl: data.trackUrl ?? null,
        durationMs: typeof data.durationMs === "number" ? data.durationMs : null,
        stoppedAtMs: null,
        stoppedProgressMs: null,
      };

      const trackKey = `${data.title}::${data.artist}::${data.album}`;
      const durationMs = typeof data.durationMs === "number" ? data.durationMs : null;
      const progressMs = typeof data.progressMs === "number" ? data.progressMs : null;
      const isPlaying = Boolean(data.isPlaying);

      if (lastTrackKey && trackKey !== lastTrackKey) {
        lastProgressMs = null;
        lastSyncAt = 0;
      }

      lastTrackKey = trackKey;
      lastDurationMs = durationMs;
      lastProgressMs = progressMs;
      lastIsPlaying = isPlaying;
      lastSyncAt = Date.now();

      setProgress(progressMs, durationMs);

      if (isPlaying) startTicking();
      else stopTicking();

      lastTrackUrl = data.trackUrl || null;
      if (btnOpen instanceof HTMLButtonElement) btnOpen.disabled = !lastTrackUrl;
      elHint.textContent = "";
    } catch (e) {
      elHint.textContent = "Unable to load now playing.";
    }
  }

  btnOpen?.addEventListener("click", () => {
    if (lastTrackUrl) window.open(lastTrackUrl, "_blank", "noopener,noreferrer");
  });
  btnRefresh?.addEventListener("click", () => refresh());

  refresh();
  timer = setInterval(refresh, pollMs);

  window.addEventListener("beforeunload", () => {
    if (timer) clearInterval(timer);
    if (tickTimer) clearInterval(tickTimer);
  });
</script>