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

#pragma once

#include "Containers/Array.h"
#include "CoreMinimal.h"
#include "Elements/Framework/TypedElementHandle.h"
#include "Math/UnrealMathSSE.h"
#include "Math/Vector.h"
#include "Templates/SharedPointer.h"
#include "UObject/Object.h"
#include "UObject/ObjectMacros.h"
#include "UObject/ObjectPtr.h"
#include "UObject/UObjectGlobals.h"
#include "UObject/WeakObjectPtr.h"
#include "UObject/WeakObjectPtrTemplates.h"

#include "LevelEditorMenuContext.generated.h"

class AActor;
class FLevelEditorViewportClient;
class ILevelEditor;
class SLevelEditor;
class SLevelViewport;
class SLevelViewportToolBar;
class UActorComponent;
class UTypedElementSelectionSet;
struct FFrame;

UCLASS()
class LEVELEDITOR_API ULevelEditorMenuContext : public UObject
{
	GENERATED_BODY()
public:
	TWeakPtr<ILevelEditor> GetLevelEditor() const;

	TWeakPtr<SLevelEditor> LevelEditor;
};


/** Enum to describe what a level editor context menu should be built for */
UENUM()
enum class ELevelEditorMenuContext : uint8
{
	/** This context menu is applicable to a viewport (limited subset of entries) */
	Viewport,
	/** This context menu is applicable to the Scene Outliner (disables click-position-based menu items) */
	SceneOutliner,
	/** This is the replica of the context menu that appears in the main menu bar (lists all entries) */
	MainMenu,
};

UCLASS()
class LEVELEDITOR_API ULevelEditorContextMenuContext : public UObject
{
	GENERATED_BODY()
public:
	TWeakPtr<ILevelEditor> LevelEditor;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	ELevelEditorMenuContext ContextType;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	TObjectPtr<const UTypedElementSelectionSet> CurrentSelection;
	
	/** If the ContextType is Viewport this property can be set to the HitProxy element that triggered the ContextMenu. */
	FTypedElementHandle HitProxyElement;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	FVector CursorWorldLocation;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	TArray<TObjectPtr<UActorComponent>> SelectedComponents;

	/** If the ContextType is Viewport this property can be set to the HitProxy actor that triggered the ContextMenu. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	TWeakObjectPtr<AActor> HitProxyActor = nullptr;

	UFUNCTION(BlueprintCallable, Category = "LevelEditor | Menu", DisplayName="Get Hit Proxy Element", meta=(ScriptName="GetHitProxyElement"))
	FScriptTypedElementHandle GetScriptHitProxyElement();
};

UCLASS()
class LEVELEDITOR_API ULevelViewportToolBarContext : public UObject
{
	GENERATED_BODY()
public:
	TWeakPtr<SLevelViewportToolBar> LevelViewportToolBarWidget;

	virtual FLevelEditorViewportClient* GetLevelViewportClient() const;
};


UCLASS()
class LEVELEDITOR_API UQuickActionMenuContext : public UObject
{
	GENERATED_BODY()
public:
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="LevelEditor|Menu")
	TObjectPtr<const UTypedElementSelectionSet> CurrentSelection;
};