using XCEngine;
using XCEngine.Rendering;

namespace XCEngine.Rendering.Universal
{
    internal sealed class UniversalRenderPipeline
        : ScriptableRenderPipeline
    {
        private readonly ScriptableRendererData m_rendererData;
        private ScriptableRenderer m_renderer;

        public UniversalRenderPipeline(
            ScriptableRendererData rendererData)
        {
            m_rendererData = rendererData;
        }

        protected override bool SupportsStageRenderGraph(
            CameraFrameStage stage)
        {
            ScriptableRenderer renderer = GetOrCreateRenderer();
            return renderer != null &&
                   renderer.SupportsStageRenderGraph(stage);
        }

        protected override bool RecordStageRenderGraph(
            ScriptableRenderContext context)
        {
            ScriptableRenderer renderer = GetOrCreateRenderer();
            return renderer != null &&
                   renderer.RecordStageRenderGraph(context);
        }

        private ScriptableRenderer GetOrCreateRenderer()
        {
            if (m_renderer == null &&
                m_rendererData != null)
            {
                m_renderer =
                    m_rendererData.CreateRendererInstance();
            }

            return m_renderer;
        }
    }
}