using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public class CameraZoomEffect : EffectBase
    {
        #region [效果参数] Effect Parameters
        public float relativeZoom;
        public AnimationCurve zoomCurve;

        private Camera _mainCamera;
        private float _startFOV = 60f; // 请填入你项目的默认摄像机广角值
        #endregion
        
        #region [初始化] Initialization
        public CameraZoomEffect(float effectTime, float relativeZoom, AnimationCurve zoomCurve)
            : base(effectTime)
        {
            this.effectTime = effectTime;
            this.relativeZoom = relativeZoom;
            this.zoomCurve = zoomCurve;
        }
        #endregion
        
        #region [效果逻辑覆盖] Effect Pattern Overrides
        public override void PreExecute()
        {
            if (_mainCamera == null)
            {
                _mainCamera = GameManager.Instance.cameraManager.gameCamera.cam;
            }
            
            _startFOV = _mainCamera.fieldOfView; // 记录初始 FOV，结束时恢复
        }

        public override void Execute()
        {
            if (_mainCamera != null)
            {
                // relativeZoom > 0 代表拉近视野，FOV 更小
                float offset = zoomCurve.Evaluate(effectProgressPercent) * relativeZoom;
                _mainCamera.fieldOfView = _startFOV - offset;
            }
        }

        public override void Adjust() { ResetEffect(); }
        public override void Recover() { ResetEffect(); }
        public override void Disrupt() { ResetEffect(); }

        private void ResetEffect()
        {
            if (_mainCamera != null) _mainCamera.fieldOfView = _startFOV;
        }
        #endregion

    }

}