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

#include "MVVMBlueprintViewBinding.h"
#include "MVVMBlueprintView.h"
#include "MVVMWidgetBlueprintExtension_View.h"
#include "WidgetBlueprintExtension.h"

FName FMVVMBlueprintViewBinding::GetFName(const UMVVMBlueprintView* View) const
{
	TStringBuilder<256> BindingName;

	const FMVVMBlueprintViewModelContext* ViewModel = nullptr;
	if (View != nullptr)
	{
		ViewModel = View->FindViewModel(ViewModelPath.GetViewModelId());
	}

	if (ViewModel != nullptr)
	{
		BindingName << ViewModel->GetViewModelName();
	}
	else
	{
		BindingName << TEXT("Invalid");
	}

	BindingName << TEXT("_");
	BindingName << ViewModelPath.GetBasePropertyPath();

	if (BindingType == EMVVMBindingMode::TwoWay)
	{
		BindingName << TEXT("_Both_");
	}
	else if (UE::MVVM::IsForwardBinding(BindingType))
	{
		BindingName << TEXT("_To_");
	}
	else if (UE::MVVM::IsBackwardBinding(BindingType))
	{
		BindingName << TEXT("_From_");
	}

	if (View == nullptr || WidgetPath.GetWidgetName().IsNone())
	{
		BindingName << TEXT("Invalid_");
	}
	else if (View->GetOuterUMVVMWidgetBlueprintExtension_View()->GetWidgetBlueprint()->GetFName() != WidgetPath.GetWidgetName())
	{
		BindingName << WidgetPath.GetWidgetName();
		BindingName << TEXT("_");
	}

	BindingName << WidgetPath.GetBasePropertyPath();

	return BindingName.ToString();
}

FString FMVVMBlueprintViewBinding::GetDisplayNameString(const UMVVMBlueprintView* View) const
{
	const FMVVMBlueprintViewModelContext* ViewModel = nullptr;
	if (View != nullptr)
	{
		ViewModel = View->FindViewModel(ViewModelPath.GetViewModelId());
	}

	TStringBuilder<512> BindingName;
	if (ViewModel != nullptr)
	{
		BindingName << ViewModel->GetViewModelName();
	}
	else
	{
		BindingName << TEXT("<none>");
	}

	BindingName << TEXT(".");
	BindingName << ViewModelPath.GetBasePropertyPath();

	if (BindingType == EMVVMBindingMode::TwoWay)
	{
		BindingName << TEXT(" <-> ");
	}
	else if (UE::MVVM::IsForwardBinding(BindingType))
	{
		BindingName << TEXT(" -> ");
	}
	else if (UE::MVVM::IsBackwardBinding(BindingType))
	{
		BindingName << TEXT(" <- ");
	}
	else
	{
		BindingName << TEXT(" ??? "); // shouldn't happen
	}

	if (View == nullptr || WidgetPath.GetWidgetName().IsNone())
	{
		BindingName << TEXT("<none>.");
	}
	else if (View->GetOuterUMVVMWidgetBlueprintExtension_View()->GetWidgetBlueprint()->GetFName() != WidgetPath.GetWidgetName())
	{
		BindingName << WidgetPath.GetWidgetName();
		BindingName << TEXT(".");
	}
	
	BindingName << WidgetPath.GetBasePropertyPath();
	
	return BindingName.ToString();
}