using System;
using Sirenix.OdinInspector;
using SLSUtilities.Feedback;
using UnityEngine;

namespace Cielonos.MainGame.Effects.Feedback
{
    /// <summary>
    /// 摄像机位移震动反馈，通过 CameraPositionShakeEvent 触发 CinemachinePositionShaker。
    /// </summary>
    [Serializable]
    [FeedbackActionColor(0.4f, 0.8f, 0.4f)]
    public class CameraPositionShakeAction : CinemachineActionBase
    {
        public override string DisplayName => "Camera Position Shake";

        [TitleGroup("位移震动设置")]
        [LabelText("震动曲线")]
        public FloatCurveChannel intensityCurve = FloatCurveChannel.CreateDefault();

        [TitleGroup("位移震动设置")]
        [LabelText("振幅")]
        public Vector3 amplitude = new Vector3(0.5f, 0.5f, 0f);

        [TitleGroup("方向设置")]
        public CameraDirectionSettings directionSettings = new CameraDirectionSettings();

        [TitleGroup("距离衰减")]
        [LabelText("启用衰减")]
        public bool useAttenuation;

        [ShowIf("useAttenuation")]
        [LabelText("衰减范围")]
        public float attenuationRange = 50f;

        [ShowIf("useAttenuation")]
        [LabelText("衰减曲线")]
        public AnimationCurve attenuationCurve = new AnimationCurve(
            new Keyframe(0f, 1f),
            new Keyframe(1f, 0f)
        );

        protected override void TriggerEvent(FeedbackContext context)
        {
            Vector3 finalAmplitude = directionSettings.TransformAmplitude(amplitude, context.owner);
            float intensityMultiplier = ComputeAttenuation(context);
            CameraPositionShakeEvent.Trigger(context, intensityCurve, finalAmplitude * intensityMultiplier);
        }
        
        protected override void StopEvent(FeedbackContext context)
        {
            CameraPositionShakeEvent.Trigger(context, intensityCurve, Vector3.zero, true);
        }

        private float ComputeAttenuation(FeedbackContext context)
        {
            if (!useAttenuation || context.owner == null) return 1f;

            Camera mainCamera = Camera.main;
            if (mainCamera == null) return 1f;

            float distance = Vector3.Distance(context.owner.position, mainCamera.transform.position);
            float normalizedDistance = Mathf.Clamp01(distance / attenuationRange);
            return attenuationCurve.Evaluate(normalizedDistance);
        }

        public override bool Validate(out string error)
        {
            error = null;
            return true;
        }
    }
}