// Native ES module served with the production JavaScript MIME type.
export class AudioDirector {
  constructor(records, getSettings) {
    this.getSettings = getSettings;
    this.records = records;
    this.sounds = new Map();
    this.music = null;
    this.ambience = null;
    this.unlocked = false;
    records.forEach((record) => {
      this.sounds.set(record.id, new window.Howl({
        src: record.urls || [record.url],
        loop: record.type !== "sfx",
        preload: record.type === "sfx",
        volume: 0
      }));
    });
    document.addEventListener("visibilitychange", () => {
      if (document.hidden) window.Howler?.mute(true);
      else if (this.getSettings().sound) window.Howler?.mute(false);
    });
  }

  unlock() {
    this.unlocked = true;
    window.Howler?.ctx?.resume?.();
    this.sync();
  }

  sync() {
    const settings = this.getSettings();
    window.Howler.volume(settings.masterVolume);
    window.Howler.mute(!settings.sound);
    if (this.music) this.sounds.get(this.music)?.volume(settings.musicVolume);
    if (this.ambience) this.sounds.get(this.ambience)?.volume(settings.ambienceVolume * 0.35);
  }

  playLocation(music, ambience) {
    if (!this.unlocked) return;
    this.crossfade("music", music);
    this.crossfade("ambience", ambience);
  }

  crossfade(channel, nextId) {
    const currentId = this[channel];
    if (currentId === nextId) return;
    const settings = this.getSettings();
    const target = channel === "music" ? settings.musicVolume : settings.ambienceVolume * 0.35;
    if (currentId && this.sounds.has(currentId)) {
      const old = this.sounds.get(currentId);
      old.fade(old.volume(), 0, 500);
      window.setTimeout(() => old.stop(), 520);
    }
    this[channel] = nextId;
    const next = this.sounds.get(nextId);
    if (next) {
      next.volume(0);
      if (!next.playing()) next.play();
      next.fade(0, target, 700);
    }
  }

  sfx(id) {
    if (!this.unlocked || !this.getSettings().sound) return;
    const sound = this.sounds.get(id);
    if (sound) {
      sound.volume(this.getSettings().sfxVolume);
      sound.play();
    }
  }

  duck(active) {
    if (!this.music) return;
    const sound = this.sounds.get(this.music);
    const volume = this.getSettings().musicVolume * (active ? 0.45 : 1);
    sound?.fade(sound.volume(), volume, 250);
  }
}