using XCEngine;
using XCEngine.Rendering;

namespace XCEngine.Rendering.Universal
{
    internal sealed class UniversalFinalOutputBlock
    {
        private readonly BuiltinFinalColorPass m_builtinFinalColorPass =
            new BuiltinFinalColorPass();

        public void FinalizeCameraFramePlan(
            ScriptableRenderPipelinePlanningContext context,
            UniversalPostProcessBlock postProcessBlock)
        {
            if (context == null ||
                !context.HasFinalColorProcessing())
            {
                return;
            }

            context.ClearFullscreenStage(
                CameraFrameStage.FinalOutput);

            CameraFrameColorSource finalOutputSource =
                postProcessBlock != null
                    ? postProcessBlock.ResolveFinalOutputSource(
                        context)
                    : CameraFrameColorSource.MainSceneColor;

            context.RequestFullscreenStage(
                CameraFrameStage.FinalOutput,
                finalOutputSource);
        }

        public void EnqueueRenderPasses(
            ScriptableRenderer renderer,
            RenderingData renderingData)
        {
            if (renderer == null ||
                renderingData == null)
            {
                return;
            }

            if (!renderingData.isFinalOutputStage &&
                !renderingData.finalColorData.requiresProcessing)
            {
                return;
            }

            renderer.EnqueuePass(m_builtinFinalColorPass);
        }
    }
}