using Games.Events;
using Module.Log;
using UnityEngine;
public class CameraSpaceBlur : MonoBehaviour
{
    public Material blurMaterial;
    public float maxBlurOffset = 0.1f;
    public float maxBright = 0.7f;
    public AnimationCurve enterCurve = new AnimationCurve(new Keyframe(0f, 0f), new Keyframe(0.65f, 0.1f), new Keyframe(1f, 1f));
    public AnimationCurve exitCurve = new AnimationCurve(new Keyframe(1f, 1f), new Keyframe(0.1f, 0.72f), new Keyframe(0f, 0f));
    public float enterTime = 1.7f;
    public float exitTime = 1.5f;
    
    private Material _mMaterial;
    private Camera _mCamera;
    private bool _maxEventSent;
    private float _time;
    private float _offset;
    private float _bright;

    private void Start()
    {
        // Disable if we don't support image effects
        if (!SystemInfo.supportsImageEffects)
        {
            LogModule.DebugLog("Disabling the Camera Blur. Image effects are not supported (do you have Unity Pro?)");
            enabled = false;
        }
        else
        {
            _mCamera = GetComponent<Camera>();
            if (blurMaterial == null)
            {
                LogModule.ErrorLog(string.Format("{0}未设置BlurMaterial！", gameObject.name));
                enabled = false;
            }
            else if (_mCamera == null)
            {
                LogModule.ErrorLog(string.Format("{0}没有摄像机！", gameObject.name));
                enabled = false;
            }
            else
                _mMaterial = Instantiate(blurMaterial);
        }
    }
    private void OnEnable()
    {
        _time = 0f;
        _maxEventSent = false;
    }
    private void Update()
    {
        if (_time < enterTime)
        {
            if (_time <= 0 && SceneMovieManager.Instance.CheckPlaySceneMovie(false, 3f)) //场景过场动画的，给个2秒的延迟让其加载
                return;

            float ratio = _time / enterTime;
            ratio = enterCurve.Evaluate(ratio);
            _bright = ratio * maxBright;
            _offset = ratio * maxBlurOffset;
        }
        else
        {
            if (!_maxEventSent)
            {
                // 刻意保留一帧最大值来遮挡摄像机镜头变换和其他变换效果
                _maxEventSent = true;
                var ratio = enterCurve.Evaluate(1);
                _bright = ratio * maxBright;
                _offset = ratio * maxBlurOffset;
                EventDispatcher.Instance.Dispatch(Games.Events.EventId.CameraSpaceBlurMax);
            }
            else if (_time < enterTime + exitTime)
            {
                float ratio = (_time - enterTime) / exitTime;
                ratio = exitCurve.Evaluate(ratio);
                _bright = ratio * maxBright;
                _offset = ratio * maxBlurOffset;
            }
            else
            {
                enabled = false;
                SceneMovieManager.Instance.PlaySceneMovie();
            }
        }
        _time += Time.deltaTime;
    }
    private void OnDestroy()
    {
        Destroy(_mMaterial);
    }
    private void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        SetMaterial();
        Graphics.Blit(source, destination, _mMaterial);
    }
    private void SetMaterial()
    {
        _mMaterial.SetFloat("_Offset", _offset);
        _mMaterial.SetFloat("_Bright", _bright);
    }
}