using UnityEngine;
using System.IO;

namespace OCES.Audio
{
    /// <summary>
    /// 音频系统扩展配置，集中管理所有路径和可调参数。
    /// 资产位置：Assets/Settings/AudioExtendSettings.asset
    /// 编辑入口：Project Settings > Audio Extend
    /// 运行时注入：AudioSystem.Awake() 将 Inspector 引用注入 _instance
    /// </summary>
    public class AudioExtendSettings : ScriptableObject
    {
        // ========== Resource Paths ==========
        [Header("Resource Paths")]
        [Tooltip("Resources 子目录：音频配置文件（.bytes）")]
        public string audioConfigPath = "AudioData";
    
        [Tooltip("Resources 子目录：音频资源文件（.wav/.ogg）")]
        public string audioResourcePath = "Audios";
    
        [Tooltip("Resources 路径：AudioMixer 资产")]
        public string audioMixerPath = "Audios/Master";
        
        // ========== AudioMixer Group Paths ==========
        [Header("AudioMixer Groups")]
        public string sfxGroupPath       = "Master/Regular/SFX";
        public string voiceGroupPath     = "Master/Regular/Voice";
        public string accentSfxGroupPath = "Master/SFX_Accent";
        public string musicGroupPath     = "Master/Regular/Music";
        public string ambienceGroupPath  = "Master/Regular/SFX/Ambience";
    
        // ========== AudioMixer Parameters ==========
        [Header("Lowpass Filter")]
        public string lowpassParamName       = "LowpassFreq";
        public float  lowpassEnabledCutoff   = 440f;
        public float  lowpassDisabledCutoff  = 22000f;
        public float  lowpassTweenDuration   = 0.2f;
    
        // ========== Audio Import ==========
        [Header("Audio Import Settings")]
        public AudioCompressionFormat compressionFormat = AudioCompressionFormat.Vorbis;
        public uint  sfxSampleRate    = 22050;
        public uint  musicSampleRate  = 44100;
        public float musicQuality    = 0.13f;
        public float sfxQuality      = 0.5f;
        
        public float decompressThreshold  = 5f;   // ≤ 此值 → DecompressOnLoad
        public float streamingThreshold   = 15f;  // ≥ 此值 → Streaming

        // ========== Fade ==========
        [Header("Fade")]
        public DG.Tweening.Ease defaultFadeOutEase = DG.Tweening.Ease.InSine;
        public DG.Tweening.Ease defaultFadeInEase  = DG.Tweening.Ease.OutSine;
    
        // ── Singleton ──

        public static AudioExtendSettings Instance { get; internal set; }

        // 便利属性：拼接完整路径
        public string FullAudioResourcePath
        {
            get { return Path.Combine(Application.dataPath, "Resources", this.audioResourcePath); }
        }

        public string FullAudioConfigPath
        {
            get { return Path.Combine(Application.dataPath, "Resources", this.audioConfigPath); }
        }
    }
}