// Assets/Scripts/Audio/UnderwaterAudioController.cs
// 进入 LiquidZone 时切换水下 DSP 处理（Architecture 21_LiquidPuzzleModule §3.4）
using UnityEngine;
using UnityEngine.Audio;

namespace BaseGames.Audio
{
    /// <summary>
    /// 挂载于 PlayerController 所在 GameObject。
    /// 由 LiquidZone.OnTriggerEnter2D / OnTriggerExit2D 直接调用。
    /// 切换 AudioMixer Snapshot 以应用/解除水下 DSP 处理。
    /// </summary>
    public class UnderwaterAudioController : MonoBehaviour
    {
        [SerializeField] private AudioMixer _mixer;
        [SerializeField] private float      _transitionDuration = 0.3f;

        /// <summary>玩家进入 Water 类型液体时调用。</summary>
        public void EnterWater()
        {
            _mixer?.FindSnapshot("Underwater")?.TransitionTo(_transitionDuration);
        }

        /// <summary>玩家离开液体时调用。</summary>
        public void ExitWater()
        {
            _mixer?.FindSnapshot("Default")?.TransitionTo(_transitionDuration);
        }
    }
}