/**
 * 音频管理器
 */
export default class AudioManager {
  constructor() {
    this.bgm = null;
    this.sfx = {};
    this.isMuted = false;
    this.bgmVolume = 0.5;
    this.sfxVolume = 0.8;
  }

  /**
   * 播放背景音乐
   */
  playBGM(src) {
    if (this.isMuted || !src) return;

    // 停止当前BGM
    this.stopBGM();

    // 创建新的音频实例
    this.bgm = wx.createInnerAudioContext();
    this.bgm.src = src;
    this.bgm.loop = true;
    this.bgm.volume = this.bgmVolume;
    this.bgm.play();
  }

  /**
   * 停止背景音乐
   */
  stopBGM() {
    if (this.bgm) {
      this.bgm.stop();
      this.bgm.destroy();
      this.bgm = null;
    }
  }

  /**
   * 暂停背景音乐
   */
  pauseBGM() {
    if (this.bgm) {
      this.bgm.pause();
    }
  }

  /**
   * 恢复背景音乐
   */
  resumeBGM() {
    if (this.bgm && !this.isMuted) {
      this.bgm.play();
    }
  }

  /**
   * 播放音效
   */
  playSFX(name, src) {
    if (this.isMuted || !src) return;

    // 复用或创建音效实例
    if (!this.sfx[name]) {
      this.sfx[name] = wx.createInnerAudioContext();
      this.sfx[name].src = src;
    }

    this.sfx[name].volume = this.sfxVolume;
    this.sfx[name].seek(0);
    this.sfx[name].play();
  }

  /**
   * 播放点击音效
   */
  playClick() {
    // 可以配置点击音效
    // this.playSFX('click', 'audio/click.mp3');
  }

  /**
   * 设置静音
   */
  setMute(muted) {
    this.isMuted = muted;
    if (muted) {
      this.pauseBGM();
    } else {
      this.resumeBGM();
    }
  }

  /**
   * 切换静音状态
   */
  toggleMute() {
    this.setMute(!this.isMuted);
    return this.isMuted;
  }

  /**
   * 设置BGM音量
   */
  setBGMVolume(volume) {
    this.bgmVolume = Math.max(0, Math.min(1, volume));
    if (this.bgm) {
      this.bgm.volume = this.bgmVolume;
    }
  }

  /**
   * 设置音效音量
   */
  setSFXVolume(volume) {
    this.sfxVolume = Math.max(0, Math.min(1, volume));
  }

  /**
   * 销毁所有音频
   */
  destroy() {
    this.stopBGM();
    Object.values(this.sfx).forEach(audio => {
      audio.stop();
      audio.destroy();
    });
    this.sfx = {};
  }
}