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

namespace SLSFramework.Rendering.PostProcessing
{
    [System.Serializable, VolumeComponentMenu("Custom/RGBSplitGlitch")]
    public class RGBSplitGlitch : ScriptablePostProcessorVolume
    {
        public override CustomPostProcessInjectionPoint InjectionPoint => CustomPostProcessInjectionPoint.BeforePostProcess;
        public override int OrderInInjectionPoint => 0;
        
        public ClampedFloatParameter intensity = new(0f, 0f, 1f);
        public ClampedFloatParameter speed = new(10f, 0f, 100f);
        protected override string GetShaderName() => "Hidden/Custom/RGBSplitGlitch";
        
        private float elapsedTime = 1.0f;
        
        public override void Render(CommandBuffer cmd, ref RenderingData renderingData, RTHandle source, RTHandle destination)
        {
            if (material == null) return;
            elapsedTime += Time.unscaledDeltaTime;
            if (elapsedTime > 100)
            {
                elapsedTime = 0;
            }
            cmd.SetGlobalVector(InternalShaderHelpers.ID._RGBSplitGlitchParams, 
                new Vector4(intensity.value * 0.01f, Mathf.Floor(elapsedTime * speed.value)));
            Blitter.BlitCameraTexture(cmd, source, destination, material, 0);
        }

        public override bool IsActive() => intensity.value > 0f;
    }
}