using System;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.Rendering.Universal;
using UnityEngine.Serialization;

namespace Framework.RenderFeature
{
    public class GaussBlurFeature : ScriptableRendererFeature
    {
        [Serializable]
        public class Setting
        {
            public                 bool     enable         = true;
            public                 Material grayMaterial   = null;
            public                 Color    grayColor      = Color.white;
            public                 bool     isGray         = true;
            public                 bool     isBlur         = true;
            public                 Material blurMaterial   = null;
            [Range (0, 1)]  public float    blurProgress   = 1;
            [Range (0, 1)]  public float    grayScale      = 1;
            [Range (0 , 1)] public float    colorChannel_R = 1;
            [Range (0 , 1)] public float    colorChannel_G = 1;
            [Range (0 , 1)] public float    colorChannel_B = 1;
            [Range (1, 10)] public int      blurPasses     = 1;

            // [TitleGroup("模糊设置"), Title("分辨率精度（越小越高）"), Range(1, 4)]  public int      downsample   = 1;
        }

        public  RenderPassEvent          renderPassEvent = RenderPassEvent.AfterRenderingTransparents;
        public  GaussBlurFeature.Setting setting;
        public  string                   cmdName = "GaussBlurFeature";
        private GaussBlurPass            m_ScriptablePass;

        public override void Create ()
        {
            // return;
            this.m_ScriptablePass                 = new GaussBlurPass ().Init (this.setting, cmdName);
            this.m_ScriptablePass.renderPassEvent = this.renderPassEvent;
        }

        public override void AddRenderPasses (ScriptableRenderer renderer, ref RenderingData renderingData)
        {
            this.m_ScriptablePass.ConfigureInput (ScriptableRenderPassInput.Color);
            renderer.EnqueuePass (this.m_ScriptablePass);
            // var supportsCameraStackingType = renderer.SupportsCameraStackingType ( CameraRenderType.Base);
            // if (supportsCameraStackingType)
            // {
            //     renderer.EnqueuePass (this.m_ScriptablePass);
            // }
        }

        public override void SetupRenderPasses (ScriptableRenderer renderer, in RenderingData renderingData)
        {
            // 只对游戏摄像机应用后处理（还有预览摄像机等）
            if (renderingData.cameraData.cameraType == CameraType.Game)
            {
                // 设置向pass输入color (m_RenderPass父类)
                m_ScriptablePass.ConfigureInput (ScriptableRenderPassInput.Color);
                // 设置RT为相机的color
                m_ScriptablePass.SetTarget (renderer.cameraColorTargetHandle);
            }
        }
    }
}