using System;
using UnityEngine;
using UnityEngine.Rendering.Universal;

namespace SicknessReduction.Visual.Rendering
{
    public class MaterialBlitFeature : ScriptableRendererFeature
    {
        // MUST be named "settings" (lowercase) to be shown in the Render Features inspector
        public MyFeatureSettings settings = new MyFeatureSettings();
        private MaterialBlitRenderPass myRenderPass;

        private RenderTargetHandle renderTextureHandle;

        public override void Create()
        {
            myRenderPass = new MaterialBlitRenderPass(
                "Material Blit Render Pass",
                settings.WhenToInsert,
                settings.MaterialToBlit
            );
        }

        // called every frame once per camera
        public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
        {
            if (!settings.IsEnabled)
                // we can do nothing this frame if we want
                return;

            // Gather up and pass any extra information our pass will need.
            // In this case we're getting the camera's color buffer target
            var cameraColorTargetIdent = renderer.cameraColorTarget;
            myRenderPass.Setup(cameraColorTargetIdent);

            // Ask the renderer to add our pass.
            // Could queue up multiple passes and/or pick passes to use
            renderer.EnqueuePass(myRenderPass);
        }

        [Serializable]
        public class MyFeatureSettings
        {
            // we're free to put whatever we want here, public fields will be exposed in the inspector
            public bool IsEnabled = true;
            public RenderPassEvent WhenToInsert = RenderPassEvent.AfterRendering;
            public Material MaterialToBlit;
        }
    }
}