// Classic script runs before deferred modules, retaining initial host callbacks.
window.rhineWallpaperHost = { properties: {}, fps: 30, paused: false };
let resolveInitialWallpaperProperties;
window.rhineWallpaperPropertiesReady = new Promise(resolve => { resolveInitialWallpaperProperties = resolve; });
window.wallpaperPropertyListener = {
  applyUserProperties(properties) {
    Object.assign(window.rhineWallpaperHost.properties, properties);
    window.dispatchEvent(new CustomEvent("rhine-wallpaper-properties", { detail: properties }));
    resolveInitialWallpaperProperties();
  },
  applyGeneralProperties(properties) {
    if (Number.isFinite(properties.fps) && properties.fps > 0)
      window.rhineWallpaperHost.fps = properties.fps;
  },
  setPaused(paused) {
    window.rhineWallpaperHost.paused = !!paused;
    window.dispatchEvent(new Event("rhine-wallpaper-pause"));
  },
};

// A normal HTTP preview has no native property callback. The actual file-based
// wallpaper must wait for the host, regardless of how late its callback arrives.
if (location.protocol !== "file:" && typeof window.wallpaperRegisterAudioListener !== "function")
  setTimeout(() => resolveInitialWallpaperProperties(), 0);

// Register immediately: the host may deliver media before the module is ready.
window.rhineWallpaperMedia = {};
window.rhineWallpaperSpectrum = { samples: [], time: 0 };
if (typeof window.wallpaperRegisterAudioListener === "function") {
  window.wallpaperRegisterAudioListener(function wallpaperAudioListener(samples) {
    if (!samples || samples.length !== 128) return;
    window.rhineWallpaperSpectrum = {
      samples: Array.from(samples, function (value) { return Number.isFinite(value) ? Math.max(0, Math.min(1, value)) : 0; }),
      time: performance.now() / 1000,
    };
  });
}
for (const kind of ["Status", "Properties", "Thumbnail", "Playback", "Timeline"]) {
  const register = window["wallpaperRegisterMedia" + kind + "Listener"];
  if (typeof register === "function") register(function (event) {
    window.rhineWallpaperMedia[kind.toLowerCase()] = event;
    // These are independent change-only channels, not a track snapshot.
    // A player may send artwork/timeline before text, or reuse the same art
    // across tracks without another thumbnail callback. Only their own events
    // can replace/clear those values; a text update must not erase them.
    if (kind === "Playback") {
      const constants = window.wallpaperMediaIntegration || {};
      window.rhineWallpaperMedia.playing = event.state === (constants.PLAYBACK_PLAYING ?? constants.playback?.PLAYING ?? 1);
    }
    window.dispatchEvent(new Event("rhine-wallpaper-media"));
  });
}