using System;

namespace XCEngine
{
    public sealed class ScriptableRenderPipelinePlanningContext
    {
        private readonly ulong m_nativeHandle;

        internal ScriptableRenderPipelinePlanningContext(ulong nativeHandle)
        {
            m_nativeHandle = nativeHandle;
        }

        public void ClearPostProcessStage()
        {
            InternalCalls.Rendering_ScriptableRenderPipelinePlanningContext_ClearPostProcessStage(
                m_nativeHandle);
        }

        public void RequestPostProcessStage(
            CameraFrameColorSource source,
            bool usesGraphManagedOutputColor)
        {
            if (source == CameraFrameColorSource.ExplicitSurface)
            {
                throw new ArgumentException(
                    "Managed planning currently requires a graph-managed source for post-process stages.",
                    nameof(source));
            }

            if (!InternalCalls
                    .Rendering_ScriptableRenderPipelinePlanningContext_RequestPostProcessStage(
                        m_nativeHandle,
                        (int)source,
                        usesGraphManagedOutputColor))
            {
                throw new InvalidOperationException(
                    "Failed to request the managed post-process stage.");
            }
        }

        public void ClearFinalOutputStage()
        {
            InternalCalls.Rendering_ScriptableRenderPipelinePlanningContext_ClearFinalOutputStage(
                m_nativeHandle);
        }

        public void RequestFinalOutputStage(
            CameraFrameColorSource source)
        {
            if (source == CameraFrameColorSource.ExplicitSurface)
            {
                throw new ArgumentException(
                    "Managed planning currently requires a graph-managed source for final-output stages.",
                    nameof(source));
            }

            if (!InternalCalls
                    .Rendering_ScriptableRenderPipelinePlanningContext_RequestFinalOutputStage(
                        m_nativeHandle,
                        (int)source))
            {
                throw new InvalidOperationException(
                    "Failed to request the managed final-output stage.");
            }
        }
    }
}