// 音频播放器工具类

/**
 * 音频播放器类
 */
class AudioPlayerClass {
  constructor() {
    this.audioPlayer = null;
    this.isLoaded = false;
    this.isPlaying = false;
  }

  /**
   * 初始化音频播放器
   * @param {string} audioPath - 音频文件路径
   * @param {boolean} loop - 是否循环播放
   * @returns {Promise} - 初始化结果
   */
  init(audioPath, loop = true) {
    return new Promise((resolve, reject) => {
      try {
        // 创建Audio对象并加载音频文件
        this.audioPlayer = new Audio(audioPath);
        this.audioPlayer.loop = loop; // 设置循环播放

        this.audioPlayer.addEventListener('canplaythrough', () => {
          this.isLoaded = true;
          resolve(true);
        });

        // 监听错误事件
        this.audioPlayer.addEventListener('error', (error) => {
          reject(error);
        });

        this.audioPlayer.load();
      } catch (error) {
        reject(error);
      }
    });
  }

  /**
   * 播放音频
   * @param {boolean} autoUnmute - 是否自动取消静音
   * @returns {Promise} - 播放结果
   */
  play(autoUnmute = true) {
    return new Promise((resolve, reject) => {
      if (!this.audioPlayer) {
        reject(new Error('音频播放器未初始化'));
        return;
      }

      if (!this.isLoaded) {
        reject(new Error('音频未加载完成'));
        return;
      }

      try {
        // 严格模式下的播放策略：先设置静音，再取消静音，最后播放
        if (autoUnmute) {
          this.audioPlayer.muted = true;

          // 使用setTimeout确保时序正确
          setTimeout(() => {
            this.audioPlayer.muted = false;
            this.audioPlayer.play()
              .then(() => {
                this.isPlaying = true;
                resolve(true);
              })
              .catch(error => reject(error));
          }, 0);
        } else {
          this.audioPlayer.play()
            .then(() => {
              this.isPlaying = true;
              resolve(true);
            })
            .catch(error => {
              if (error.name === 'NotAllowedError') {
                // 浏览器自动播放策略阻止，静默忽略
              }
              reject(error);
            });
        }
      } catch (error) {
        console.error('音频播放失败:', error);
        reject(error);
      }
    });
  }

  /**
   * 暂停音频
   */
  pause() {
    if (this.audioPlayer) {
      this.audioPlayer.pause();
      this.isPlaying = false;
    }
  }

  /**
   * 设置音量
   * @param {number} volume - 音量值（0-1）
   */
  setVolume(volume) {
    if (this.audioPlayer) {
      this.audioPlayer.volume = Math.max(0, Math.min(1, volume));
    }
  }

  /**
   * 设置是否静音
   * @param {boolean} muted - 是否静音
   */
  setMuted(muted) {
    if (this.audioPlayer) {
      this.audioPlayer.muted = muted;
    }
  }

  /**
   * 获取音频播放状态
   * @returns {boolean} - 是否正在播放
   */
  getIsPlaying() {
    return this.isPlaying;
  }

  /**
   * 获取音频加载状态
   * @returns {boolean} - 是否已加载完成
   */
  getIsLoaded() {
    return this.isLoaded;
  }

  /**
   * 销毁音频播放器
   */
  destroy() {
    if (this.audioPlayer) {
      this.audioPlayer.pause();
      this.audioPlayer.remove();
      this.audioPlayer = null;
      this.isLoaded = false;
      this.isPlaying = false;
    }
  }
}

// 导出单例实例
const audioPlayerInstance = new AudioPlayerClass();
export default audioPlayerInstance;

// 导出类（可选，用于创建多个实例）
export { AudioPlayerClass };