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

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UnrealType.h"

/*-----------------------------------------------------------------------------
        FWeakObjectProperty.
-----------------------------------------------------------------------------*/
IMPLEMENT_FIELD(FWeakObjectProperty)

FString FWeakObjectProperty::GetCPPType(FString* ExtendedTypeText /*=NULL*/, uint32 CPPExportFlags /*=0*/) const
{
    return GetCPPTypeCustom(ExtendedTypeText, CPPExportFlags,
                            FString::Printf(TEXT("%s%s"), PropertyClass->GetPrefixCPP(), *PropertyClass->GetName()));
}

FString FWeakObjectProperty::GetCPPTypeCustom(FString* ExtendedTypeText, uint32 CPPExportFlags, const FString& InnerNativeTypeName) const
{
    ensure(!InnerNativeTypeName.IsEmpty());
    if (PropertyFlags & CPF_AutoWeak)
    {
        return FString::Printf(TEXT("TAutoWeakObjectPtr<%s>"), *InnerNativeTypeName);
    }
    return FString::Printf(TEXT("TWeakObjectPtr<%s>"), *InnerNativeTypeName);
}

FString FWeakObjectProperty::GetCPPTypeForwardDeclaration() const
{
    return FString::Printf(TEXT("class %s%s;"), PropertyClass->GetPrefixCPP(), *PropertyClass->GetName());
}

FString FWeakObjectProperty::GetCPPMacroType(FString& ExtendedTypeText) const
{
    if (PropertyFlags & CPF_AutoWeak)
    {
        ExtendedTypeText = FString::Printf(TEXT("TAutoWeakObjectPtr<%s%s>"), PropertyClass->GetPrefixCPP(), *PropertyClass->GetName());
        return TEXT("AUTOWEAKOBJECT");
    }
    ExtendedTypeText = FString::Printf(TEXT("TWeakObjectPtr<%s%s>"), PropertyClass->GetPrefixCPP(), *PropertyClass->GetName());
    return TEXT("WEAKOBJECT");
}

void FWeakObjectProperty::SerializeItem(FStructuredArchive::FSlot Slot, void* Value, void const* Defaults) const
{
    FArchive& UnderlyingArchive = Slot.GetUnderlyingArchive();

    UObject* ObjectValue        = GetObjectPropertyValue(Value);
    Slot << *(FWeakObjectPtr*)Value;
    if ((UnderlyingArchive.IsLoading() || UnderlyingArchive.IsModifyingWeakAndStrongReferences()) && ObjectValue != GetObjectPropertyValue(Value))
    {
        CheckValidObject(Value);
    }
}

UObject* FWeakObjectProperty::GetObjectPropertyValue(const void* PropertyValueAddress) const
{
    return GetPropertyValue(PropertyValueAddress).Get();
}

void FWeakObjectProperty::SetObjectPropertyValue(void* PropertyValueAddress, UObject* Value) const
{
    SetPropertyValue(PropertyValueAddress, TCppType(Value));
}

uint32 FWeakObjectProperty::GetValueTypeHashInternal(const void* Src) const
{
    return GetTypeHash(*(FWeakObjectPtr*)Src);
}