using XCEngine;
using XCEngine.Rendering;

namespace XCEngine.Rendering.Universal
{
    internal static class RenderingDataResolver
    {
        public static CameraData ResolveCameraData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return CameraData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            Matrix4x4 view;
            Matrix4x4 projection;
            Matrix4x4 viewProjection;
            Vector3 worldPosition;
            Vector3 worldRight;
            Vector3 worldUp;
            Vector3 worldForward;
            Color clearColor;

            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraView(
                    nativeHandle,
                    out view);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraProjection(
                    nativeHandle,
                    out projection);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraViewProjection(
                    nativeHandle,
                    out viewProjection);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraWorldPosition(
                    nativeHandle,
                    out worldPosition);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraWorldRight(
                    nativeHandle,
                    out worldRight);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraWorldUp(
                    nativeHandle,
                    out worldUp);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraWorldForward(
                    nativeHandle,
                    out worldForward);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetCameraClearColor(
                    nativeHandle,
                    out clearColor);

            return new CameraData(
                view,
                projection,
                viewProjection,
                worldPosition,
                worldRight,
                worldUp,
                worldForward,
                clearColor,
                (RenderClearFlags)InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraClearFlags(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraPerspectiveProjection(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraVerticalFovRadians(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraOrthographicSize(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraAspectRatio(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraNearClipPlane(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraFarClipPlane(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraViewportWidth(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetCameraViewportHeight(
                        nativeHandle));
        }

        public static LightingData ResolveLightingData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return LightingData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            Vector3 mainDirectionalLightDirection;
            Color mainDirectionalLightColor;

            InternalCalls
                .Rendering_ScriptableRenderContext_GetMainDirectionalLightDirection(
                    nativeHandle,
                    out mainDirectionalLightDirection);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetMainDirectionalLightColor(
                    nativeHandle,
                    out mainDirectionalLightColor);

            return new LightingData(
                new DirectionalLightData(
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalLightEnabled(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalLightCastsShadows(
                            nativeHandle),
                    mainDirectionalLightDirection,
                    mainDirectionalLightColor,
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalLightIntensity(
                            nativeHandle)),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetHasMainDirectionalShadow(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetAdditionalLightCount(
                        nativeHandle));
        }

        public static ShadowData ResolveShadowData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return ShadowData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            Matrix4x4 viewProjection;

            InternalCalls
                .Rendering_ScriptableRenderContext_GetMainDirectionalShadowViewProjection(
                    nativeHandle,
                    out viewProjection);

            return new ShadowData(
                new DirectionalShadowData(
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowEnabled(
                            nativeHandle),
                    viewProjection,
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowOrthographicHalfExtent(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowNearClipPlane(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowFarClipPlane(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowMapWidth(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowMapHeight(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowWorldTexelSize(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowReceiverDepthBias(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowNormalBiasScale(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowStrength(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowDepthBiasFactor(
                            nativeHandle),
                    InternalCalls
                        .Rendering_ScriptableRenderContext_GetMainDirectionalShadowDepthBiasUnits(
                            nativeHandle)));
        }

        public static EnvironmentData ResolveEnvironmentData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return EnvironmentData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            Color skyboxTopColor;
            Color skyboxHorizonColor;
            Color skyboxBottomColor;

            InternalCalls
                .Rendering_ScriptableRenderContext_GetEnvironmentSkyboxTopColor(
                    nativeHandle,
                    out skyboxTopColor);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetEnvironmentSkyboxHorizonColor(
                    nativeHandle,
                    out skyboxHorizonColor);
            InternalCalls
                .Rendering_ScriptableRenderContext_GetEnvironmentSkyboxBottomColor(
                    nativeHandle,
                    out skyboxBottomColor);

            return new EnvironmentData(
                (RenderEnvironmentMode)InternalCalls
                    .Rendering_ScriptableRenderContext_GetEnvironmentMode(
                        nativeHandle),
                skyboxTopColor,
                skyboxHorizonColor,
                skyboxBottomColor);
        }

        public static FinalColorData ResolveFinalColorData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return FinalColorData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            Vector4 finalColorScale;

            InternalCalls
                .Rendering_ScriptableRenderContext_GetFinalColorScale(
                    nativeHandle,
                    out finalColorScale);

            FinalColorSettings settings =
                FinalColorSettings.CreateDefault();
            settings.outputTransferMode =
                (FinalColorOutputTransferMode)InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorOutputTransferMode(
                        nativeHandle);
            settings.exposureMode =
                (FinalColorExposureMode)InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorExposureMode(
                        nativeHandle);
            settings.exposureValue =
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorExposureValue(
                        nativeHandle);
            settings.toneMappingMode =
                (FinalColorToneMappingMode)InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorToneMappingMode(
                        nativeHandle);
            settings.finalColorScale =
                finalColorScale;

            return new FinalColorData(
                settings,
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorHasPipelineDefaults(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetFinalColorHasCameraOverrides(
                        nativeHandle));
        }

        public static StageColorData ResolveStageColorData(
            ScriptableRenderContext context)
        {
            if (context == null)
            {
                return StageColorData.Default;
            }

            ulong nativeHandle = context.nativeHandle;
            return new StageColorData(
                (CameraFrameColorSource)InternalCalls
                    .Rendering_ScriptableRenderContext_GetStageColorSource(
                        nativeHandle),
                InternalCalls
                    .Rendering_ScriptableRenderContext_GetStageUsesGraphManagedOutputColor(
                        nativeHandle));
        }
    }
}