using Echovoid.Runtime.Behavior.Rendering;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

namespace SLSUtilities.Rendering.PostProcessing
{
    public enum RadialBlurQuality
    {
        RadialBlur_4Tap_Fatest = 0,
        RadialBlur_8Tap_Balance = 1,
        RadialBlur_12Tap = 2,
        RadialBlur_16Tap_Quality = 3,
    }

    [System.Serializable, VolumeComponentMenu("SLS/Postprocessing/Radial Blur")]
    public class RadialBlur : ScriptablePostProcessorVolume
    {
        public override CustomPostProcessInjectionPoint InjectionPoint => CustomPostProcessInjectionPoint.BeforePostProcess;
        public override int OrderInInjectionPoint => 10;
        
        public EnumParameter<RadialBlurQuality> qualityLevel = new (RadialBlurQuality.RadialBlur_8Tap_Balance);
        public ClampedFloatParameter blurRadius = new(0f, -1f, 1f);
        public ClampedFloatParameter radialCenterX = new(0.5f, 0f, 1f);
        public ClampedFloatParameter radialCenterY = new(0.5f, 0f, 1f);

        public override string GetShaderName() => "SLS/Postprocessing/RadialBlur";

        public override void Render(CommandBuffer cmd, ref RenderingData renderingData, RTHandle source, RTHandle target)
        {
            if (material == null) return;
            cmd.SetGlobalVector(InternalShaderHelpers.ID._RadialBlurParams,
                new Vector4(blurRadius.value * 0.02f, radialCenterX.value, radialCenterY.value));
            Blitter.BlitCameraTexture(cmd, source, target, material, (int)qualityLevel.value);
        }

        public override bool IsActive() => !Mathf.Approximately(blurRadius.value, 0);
    }
}