using XCEngine;
using XCEngine.Rendering;

namespace XCEngine.Rendering.Universal
{
    internal sealed class UniversalDepthPrepassBlock
    {
        private readonly DrawObjectsPass m_drawDepthPrepass =
            new DrawObjectsPass(
                RenderPassEvent.BeforeRenderingPrePasses,
                SceneRenderPhase.Opaque,
                RendererListDesc.CreateDefault(
                    RendererListType.Opaque));

        public void ConfigureCameraFramePlan(
            ScriptableRenderPipelinePlanningContext context,
            DepthPrepassBlockData depthPrepass)
        {
            if (context == null)
            {
                return;
            }

            if (depthPrepass != null &&
                depthPrepass.enabled &&
                context.RequestCameraDepthOnlyStage())
            {
                return;
            }

            context.ClearDepthOnlyStage();
        }

        public void EnqueueRenderPasses(
            ScriptableRenderer renderer,
            DepthPrepassBlockData depthPrepass)
        {
            if (renderer == null ||
                depthPrepass == null ||
                !depthPrepass.enabled)
            {
                return;
            }

            m_drawDepthPrepass.Configure(
                depthPrepass.passEvent,
                SceneRenderPhase.Opaque,
                depthPrepass.rendererListDesc,
                depthPrepass.drawingSettings);
            renderer.EnqueuePass(m_drawDepthPrepass);
        }
    }
}