using System;
using XCEngine;
using XCEngine.Rendering;

namespace XCEngine.Rendering.Universal
{
    public class UniversalRendererData : ScriptableRendererData
    {
        public UniversalMainSceneData mainScene;
        public ScriptableRendererFeature[] rendererFeatures;

        public UniversalRendererData()
        {
            mainScene = UniversalMainSceneData.CreateDefault();
            rendererFeatures =
                CreateDefaultRendererFeatures();
        }

        protected override ScriptableRenderer CreateRenderer()
        {
            return new UniversalRenderer(this);
        }

        protected override ScriptableRendererFeature[] CreateRendererFeatures()
        {
            return rendererFeatures ??
                   Array.Empty<ScriptableRendererFeature>();
        }

        protected override string GetPipelineRendererAssetKey()
        {
            return "BuiltinForward";
        }

        protected override string GetCameraFrameStandalonePassAssetKey(
            CameraFrameStage stage)
        {
            switch (stage)
            {
                case CameraFrameStage.ShadowCaster:
                    return "BuiltinShadowCaster";
                default:
                    return base
                        .GetCameraFrameStandalonePassAssetKey(
                            stage);
            }
        }

        internal UniversalMainSceneData GetMainSceneInstance()
        {
            if (mainScene == null)
            {
                mainScene =
                    UniversalMainSceneData.CreateDefault();
            }

            return mainScene;
        }

        private static ScriptableRendererFeature[]
        CreateDefaultRendererFeatures()
        {
            return new ScriptableRendererFeature[]
            {
                new BuiltinGaussianSplatRendererFeature(),
                new BuiltinVolumetricRendererFeature()
            };
        }
    }
}