/// <summary>
/// 音频系统常量定义
/// </summary>
public static class AudioConstant
{
    #region Playback Limits
    
    /// <summary>
    /// 最大音乐播放数
    /// </summary>
    public const int MaxMusicCount = 1;
    
    /// <summary>
    /// 最大音效播放数
    /// </summary>
    public const int MaxSoundCount = 100;
    
    /// <summary>
    /// 最大语音播放数
    /// </summary>
    public const int MaxSpeakCount = 1;
    
    /// <summary>
    /// 音乐播放池上限
    /// </summary>
    public const int MusicPlayingLimit = 1;
    
    /// <summary>
    /// 音效播放池上限
    /// </summary>
    public const int SoundPlayingLimit = 16;
    
    /// <summary>
    /// 语音播放池上限
    /// </summary>
    public const int SpeakPlayingLimit = 8;
    
    #endregion
    
    #region Priority Values
    
    /// <summary>
    /// 最高优先级
    /// </summary>
    public const int MaxPriority = 99;
    
    /// <summary>
    /// 最低优先级
    /// </summary>
    public const int MinPriority = 0;
    
    /// <summary>
    /// 默认优先级
    /// </summary>
    public const int DefaultPriority = 29;
    
    /// <summary>
    /// 低优先级
    /// </summary>
    public const int LowPriority = 30;
    
    #endregion
    
    #region Fade Duration
    
    /// <summary>
    /// 默认淡入时长（秒）
    /// </summary>
    public const float DefaultFadeInDuration = 2f;
    
    /// <summary>
    /// 默认淡出时长（秒）
    /// </summary>
    public const float DefaultFadeOutDuration = 2f;
    
    #endregion
    
    #region Stopped Pool Limits
    
    /// <summary>
    /// 音乐停止池上限
    /// </summary>
    public const int MusicStoppedLimit = 0;
    
    /// <summary>
    /// 音效停止池上限
    /// </summary>
    public const int SoundStoppedLimit = 16;
    
    /// <summary>
    /// 语音停止池上限
    /// </summary>
    public const int SpeakStoppedLimit = 1;
    
    #endregion
    
    #region Stopped Pool Timeout
    
    /// <summary>
    /// 音乐停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public const float MusicStoppedTimeout = 60f;
    
    /// <summary>
    /// 音效停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public const float SoundStoppedTimeout = 30f;
    
    /// <summary>
    /// 语音停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public const float SpeakStoppedTimeout = 20f;
    
    /// <summary>
    /// 停止池超时检查间隔（秒）- 降低检查频率
    /// </summary>
    public const float StoppedPoolCheckInterval = 1f;
    
    #endregion
}

/// <summary>
/// 音频池容量配置
/// <para>用于配置播放池和停止池的容量上限</para>
/// </summary>
public struct AudioPoolConfig
{
    /// <summary>
    /// 音乐播放池上限
    /// </summary>
    public int MusicPlayingLimit;
    
    /// <summary>
    /// 音效播放池上限
    /// </summary>
    public int SoundPlayingLimit;
    
    /// <summary>
    /// 语音播放池上限
    /// </summary>
    public int SpeakPlayingLimit;
    
    /// <summary>
    /// 音乐停止池上限
    /// </summary>
    public int MusicStoppedLimit;
    
    /// <summary>
    /// 音效停止池上限
    /// </summary>
    public int SoundStoppedLimit;
    
    /// <summary>
    /// 语音停止池上限
    /// </summary>
    public int SpeakStoppedLimit;
    
    /// <summary>
    /// 音乐停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public float MusicStoppedTimeout;
    
    /// <summary>
    /// 音效停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public float SoundStoppedTimeout;
    
    /// <summary>
    /// 语音停止池超时时间（秒）- 长时间未使用则释放
    /// </summary>
    public float SpeakStoppedTimeout;
    
    /// <summary>
    /// 默认配置
    /// </summary>
    public static AudioPoolConfig Default => new AudioPoolConfig
    {
        MusicPlayingLimit = AudioConstant.MusicPlayingLimit,
        SoundPlayingLimit = AudioConstant.SoundPlayingLimit,
        SpeakPlayingLimit = AudioConstant.SpeakPlayingLimit,
        MusicStoppedLimit = AudioConstant.MusicStoppedLimit,
        SoundStoppedLimit = AudioConstant.SoundStoppedLimit,
        SpeakStoppedLimit = AudioConstant.SpeakStoppedLimit,
        MusicStoppedTimeout = AudioConstant.MusicStoppedTimeout,
        SoundStoppedTimeout = AudioConstant.SoundStoppedTimeout,
        SpeakStoppedTimeout = AudioConstant.SpeakStoppedTimeout,
    };
}