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

#pragma once

#include "CoreMinimal.h"
#include "Containers/ArrayView.h"
#include "UObject/ObjectMacros.h"

class UObject;
struct FPropertyAccessLibrary;

// The various batching of property copy
UENUM()
enum class EPropertyAccessBatchType : uint8
{
    // Copies designed to be called one at a time via ProcessCopy
    Unbatched,

    // Copies designed to be processed in one call to ProcessCopies
    Batched,
};

// A helper used to compile a property access library
class IPropertyAccessLibraryCompiler
{
public:
    virtual ~IPropertyAccessLibraryCompiler() {}

    // Begin compilation - reset the library to its default state
    virtual void BeginCompilation(const UClass* InClass) = 0;

    // Add a copy to the property access library we are compiling
    // @return an integer handle to the pending copy. This can be resolved to a true copy index by calling MapCopyIndex
    virtual int32 AddCopy(TArrayView<FString> InSourcePath, TArrayView<FString> InDestPath, EPropertyAccessBatchType InBatchType, UObject* InAssociatedObject = nullptr) = 0;

    // Post-process the library to finish compilation. @return true if compilation succeeded.
    virtual bool FinishCompilation() = 0;

    // Iterate any errors we have with compilation
    virtual void IterateErrors(TFunctionRef<void(const FText&, UObject*)> InFunction) const = 0;

    // Maps the initial integer copy handle to a true handle, post compilation
    virtual int32 MapCopyIndex(int32 InIndex) const = 0;
};