// Copyright Epic Games, Inc. All Rights Reserved.

#include "EditorViewportLayoutTwoPanes.h"
#include "Framework/Docking/LayoutService.h"
#include "Editor.h"
#include "Misc/ConfigCacheIni.h"
#include "Modules/ModuleManager.h"
#include "Framework/Application/SlateApplication.h"

namespace ViewportLayoutTwoPanesDefs
{
/** Default splitters to equal 50/50 split */
static const float DefaultSplitterPercentage = 0.5f;
}  // namespace ViewportLayoutTwoPanesDefs

template <EOrientation TOrientation>
TSharedRef<SWidget> TEditorViewportLayoutTwoPanes<TOrientation>::MakeViewportLayout(TFunction<TSharedRef<SEditorViewport>(void)>& Func, const FString& LayoutString)
{
    FString SpecificLayoutString = GetTypeSpecificLayoutString(LayoutString);

    FString ViewportKey0, ViewportKey1;
    FString ViewportType0, ViewportType1;
    float SplitterPercentage = ViewportLayoutTwoPanesDefs::DefaultSplitterPercentage;

    if (!SpecificLayoutString.IsEmpty())
    {
        // The Layout String only holds the unique ID of the Additional Layout Configs to use
        const FString& IniSection = FLayoutSaveRestore::GetAdditionalLayoutConfigIni();

        ViewportKey0              = SpecificLayoutString + TEXT(".Viewport0");
        ViewportKey1              = SpecificLayoutString + TEXT(".Viewport1");

        GConfig->GetString(*IniSection, *(ViewportKey0 + TEXT(".TypeWithinLayout")), ViewportType0, GEditorPerProjectIni);
        GConfig->GetString(*IniSection, *(ViewportKey1 + TEXT(".TypeWithinLayout")), ViewportType1, GEditorPerProjectIni);

        FString PercentageString;
        if (GConfig->GetString(*IniSection, *(SpecificLayoutString + TEXT(".Percentage")), PercentageString, GEditorPerProjectIni))
        {
            TTypeFromString<float>::FromString(SplitterPercentage, *PercentageString);
        }
    }
    // Set up the viewports
    FAssetEditorViewportConstructionArgs Args;
    Args.ParentLayout                                 = AsShared();
    Args.IsEnabled                                    = FSlateApplication::Get().GetNormalExecutionAttribute();

    Args.bRealtime                                    = false;
    Args.ConfigKey                                    = *ViewportKey0;
    Args.ViewportType                                 = LVT_OrthoXY;
    TSharedRef<IEditorViewportLayoutEntity> Viewport0 = FactoryViewport(Func, *ViewportType0, Args);

    Args.bRealtime                                    = !FPlatformMisc::IsRemoteSession();
    Args.ConfigKey                                    = *ViewportKey1;
    Args.ViewportType                                 = LVT_Perspective;
    TSharedRef<IEditorViewportLayoutEntity> Viewport1 = FactoryViewport(Func, *ViewportType1, Args);

    Viewports.Add(*ViewportKey0, Viewport0);
    Viewports.Add(*ViewportKey1, Viewport1);

    SplitterWidget =
        SNew(SSplitter)
            .Orientation(TOrientation) +
        SSplitter::Slot()
            .Value(SplitterPercentage)
                [Viewport0->AsWidget()] +
        SSplitter::Slot()
            .Value(1.0f - SplitterPercentage)
                [Viewport1->AsWidget()];

    return SplitterWidget.ToSharedRef();
}

/**
 * Function avoids linker errors on the template class functions in this cpp file.
 * It avoids the need to put the contents of this file into the header.
 * It doesn't get called.
 */
void EditorViewportLayoutTwoPanes_LinkErrorFixFunc()
{
    check(0);
    FEditorViewportLayoutTwoPanesVert DummyVert;
    FEditorViewportLayoutTwoPanesHoriz DummyHoriz;
}