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

#pragma once

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Object.h"
#include "Misc/Guid.h"
#include "UObject/SoftObjectPtr.h"
#include "EdGraph/EdGraphPin.h"
#include "UObject/StructOnScope.h"
#include "EditorUndoClient.h"
#include "Kismet2/StructureEditorUtils.h"
#include "UserDefinedStructEditorData.generated.h"

class ITransactionObjectAnnotation;

USTRUCT()
struct FStructVariableDescription
{
    GENERATED_USTRUCT_BODY()

    UPROPERTY()
    FName VarName;

    UPROPERTY()
    FGuid VarGuid;

    UPROPERTY()
    FString FriendlyName;

    UPROPERTY()
    FString DefaultValue;

    // TYPE DATA
    UPROPERTY()
    FName Category;

    UPROPERTY()
    FName SubCategory;

    UPROPERTY()
    TSoftObjectPtr<UObject> SubCategoryObject;

    UPROPERTY()
    FEdGraphTerminalType PinValueType;

    UPROPERTY()
    EPinContainerType ContainerType;

    // UE_DEPRECATED(4.17)
    UPROPERTY()
    uint8 bIsArray_DEPRECATED : 1;

    // UE_DEPRECATED(4.17)
    UPROPERTY()
    uint8 bIsSet_DEPRECATED : 1;

    // UE_DEPRECATED(4.17)
    UPROPERTY()
    uint8 bIsMap_DEPRECATED : 1;

    UPROPERTY(Transient)
    uint8 bInvalidMember : 1;

    UPROPERTY()
    uint8 bDontEditOnInstance : 1;

    UPROPERTY()
    uint8 bEnableSaveGame : 1;

    UPROPERTY()
    uint8 bEnableMultiLineText : 1;

    UPROPERTY()
    uint8 bEnable3dWidget : 1;

    // CurrentDefaultValue stores the actual default value, after the DefaultValue was changed, and before the struct was recompiled
    UPROPERTY(NonTransactional)
    FString CurrentDefaultValue;

    UPROPERTY()
    FString ToolTip;

    UNREALED_API bool SetPinType(const struct FEdGraphPinType& VarType);

    UNREALED_API FEdGraphPinType ToPinType() const;

    // UE_DEPRECATED(4.17)
    void PostSerialize(const FArchive& Ar);

    FStructVariableDescription()
        : ContainerType(EPinContainerType::None), bIsArray_DEPRECATED(false), bIsSet_DEPRECATED(false), bIsMap_DEPRECATED(false), bInvalidMember(false), bDontEditOnInstance(false), bEnableSaveGame(false), bEnableMultiLineText(false), bEnable3dWidget(false)
    {}
};

template <>
struct TStructOpsTypeTraits<FStructVariableDescription>: public TStructOpsTypeTraitsBase2<FStructVariableDescription>
{
    enum
    {
        WithPostSerialize = true,
    };
};

UCLASS()
class UNREALED_API UUserDefinedStructEditorData: public UObject
    , public FEditorUndoClient
{
    GENERATED_UCLASS_BODY()

private:
    // the property is used to generate an uniqe name id for member variable
    UPROPERTY(NonTransactional)
    uint32 UniqueNameId;

public:
    UPROPERTY()
    TArray<FStructVariableDescription> VariablesDescriptions;

    UPROPERTY()
    FString ToolTip;

public:
    // UObject interface.
    virtual TSharedPtr<ITransactionObjectAnnotation> FactoryTransactionAnnotation(const ETransactionAnnotationCreationMode InCreationMode) const override;
    virtual void PostEditUndo() override;
    virtual void PostEditUndo(TSharedPtr<ITransactionObjectAnnotation> TransactionAnnotation) override;
    virtual void PostLoadSubobjects(struct FObjectInstancingGraph* OuterInstanceGraph) override;
    // End of UObject interface.

    // FEditorUndoClient interface
    virtual void PostUndo(bool bSuccess) override;
    virtual void PostRedo(bool bSuccess) override { PostUndo(bSuccess); }
    // End of FEditorUndoClient interface.

    uint32 GenerateUniqueNameIdForMemberVariable();
    class UUserDefinedStruct* GetOwnerStruct() const;

    const uint8* GetDefaultInstance() const;
    void RecreateDefaultInstance(FString* OutLog = nullptr);
    void ReinitializeDefaultInstance(FString* OutLog = nullptr);
    void CleanDefaultInstance();

private:
    // Track the structure change that PostEditUndo undid to pass to FUserDefinedStructureCompilerUtils::CompileStruct
    FStructureEditorUtils::EStructureEditorChangeInfo CachedStructureChange;

    // Utility function for both PostEditUndo to route through
    void ConsolidatedPostEditUndo(FStructureEditorUtils::EStructureEditorChangeInfo ActiveChange);
};