function disabledAudio() {
  return null;
}

export default class SoundToggle {
  constructor(activator, sounds) {
    this.activator = activator;
    this.sounds = sounds;
    this.keys = Object.keys(sounds);
    this.backups = {};
    this.label = {
      disable: this.activator.dataset.labelDisable,
      enable: this.activator.dataset.labelEnable,
    };
  }

  init() {
    this._setState(this.activator.dataset.enabled);
    this.activator.addEventListener('click', this.toggle.bind(this));
  }

  toggle() {
    const newState = (this.activator.dataset.enabled === 'true') ? 'false' : 'true';
    this._setState(newState);

    if (Object.keys(this.backups).length === 0) {
      this._backupPlayMethods();
    }

    this.keys.forEach((sound) => {
      this.sounds[sound].play = (this.enabled) ? this.backups[sound] : disabledAudio;
    });
  }

  _backupPlayMethods() {
    this.keys.forEach((sound) => {
      this.backups[sound] = this.sounds[sound].play;
    });
  }

  _setState(state) {
    this.enabled = (state === 'true');
    this.activator.dataset.enabled = this.enabled;
    this.activator.textContent = (this.enabled) ? this.label.disable : this.label.enable;
  }
}