#include "UISpinner_Base.h"

#include "ZMMOThemeSubsystem.h"
#include "Engine/GameInstance.h"
#include "Engine/DataTable.h"
#include "Components/CircularThrobber.h"
#include "UI/UIStyleRow.h"

namespace
{
	// Mesmo padrão de UUIPanel_Base: runtime usa o tema ativo; design-time
	// carrega a row "Default" de DT_UI_Styles para o Designer ver igual.
	FUIStyle ResolveSpinnerStyle(const UUserWidget* Widget, const FUIStyle& Fallback)
	{
		if (Widget)
		{
			if (const UGameInstance* GI = Widget->GetGameInstance())
			{
				if (const UZMMOThemeSubsystem* Theme = GI->GetSubsystem<UZMMOThemeSubsystem>())
				{
					return Theme->GetActiveUIStyle();
				}
			}
		}
		// Design-time relê o DT a cada chamada: editar o DT_UI_Styles e
		// RECOMPILAR o WBP já reflete (sem reiniciar o editor).
		FUIStyle DesignStyle;
		bool bHas = false;
		if (const UDataTable* DT = LoadObject<UDataTable>(nullptr,
			TEXT("/Game/ZMMO/Data/UI/DT_UI_Styles.DT_UI_Styles")))
		{
			if (const FUIStyleRow* Row = DT->FindRow<FUIStyleRow>(
				FName(TEXT("Default")), TEXT("UISpinnerDesign"), false))
			{
				DesignStyle = Row->Style;
				bHas = true;
			}
		}
		return bHas ? DesignStyle : Fallback;
	}
}

static FUIStyleSpinnerVariant ResolveSpinnerVariant(const FUIStyleSpinner& Sp, FName VariantName)
{
	static const FUIStyleSpinner Defaults;
	FUIStyleSpinnerVariant V;

	if (const FUIStyleSpinnerColors* E = Sp.Colors.Find(VariantName))     { V.Colors = *E; }
	else if (const FUIStyleSpinnerColors* E2 = Defaults.Colors.Find(VariantName)) { V.Colors = *E2; }
	else { V.Colors = Defaults.Colors.FindRef(TEXT("Default")); }

	if (const FUIStyleSpinnerLayout* E = Sp.Layouts.Find(VariantName))     { V.Layout = *E; }
	else if (const FUIStyleSpinnerLayout* E2 = Defaults.Layouts.Find(VariantName)) { V.Layout = *E2; }
	else { V.Layout = Defaults.Layouts.FindRef(TEXT("Default")); }

	return V;
}

TArray<FString> UUISpinner_Base::GetVariantOptions() const
{
	TArray<FString> Options;
	Options.Add(TEXT("Default"));
	if (const UDataTable* DT = LoadObject<UDataTable>(nullptr,
		TEXT("/Game/ZMMO/Data/UI/DT_UI_Styles.DT_UI_Styles")))
	{
		if (const FUIStyleRow* Row = DT->FindRow<FUIStyleRow>(
			FName(TEXT("Default")), TEXT("UISpinnerVariantOptions"), false))
		{
			for (const TPair<FName, FUIStyleSpinnerColors>& P : Row->Style.Spinner.Colors)  { Options.AddUnique(P.Key.ToString()); }
			for (const TPair<FName, FUIStyleSpinnerLayout>& P : Row->Style.Spinner.Layouts) { Options.AddUnique(P.Key.ToString()); }
		}
	}
	return Options;
}

void UUISpinner_Base::RefreshUIStyle()
{
	const FUIStyle Fallback;
	const FUIStyle AS = ResolveSpinnerStyle(this, Fallback);
	const FUIStyleSpinnerVariant V = ResolveSpinnerVariant(AS.Spinner, Variant);

	if (Throbber)
	{
		Throbber->SetNumberOfPieces(FMath::Max(1, V.Layout.NumberOfPieces));
		Throbber->SetPeriod(FMath::Max(0.05f, V.Layout.Period));
		Throbber->SetRadius(V.Layout.Radius);
	}

	BP_ApplySpinnerStyle(V);
}

void UUISpinner_Base::NativePreConstruct()
{
	Super::NativePreConstruct();
	RefreshUIStyle();
}

void UUISpinner_Base::NativeConstruct()
{
	Super::NativeConstruct();

	if (!bThemeBound)
	{
		if (const UGameInstance* GI = GetGameInstance())
		{
			if (UZMMOThemeSubsystem* Theme = GI->GetSubsystem<UZMMOThemeSubsystem>())
			{
				Theme->OnThemeChanged.AddDynamic(this, &UUISpinner_Base::HandleThemeChanged);
				bThemeBound = true;
			}
		}
	}
	RefreshUIStyle();
}

void UUISpinner_Base::NativeDestruct()
{
	if (bThemeBound)
	{
		if (const UGameInstance* GI = GetGameInstance())
		{
			if (UZMMOThemeSubsystem* Theme = GI->GetSubsystem<UZMMOThemeSubsystem>())
			{
				Theme->OnThemeChanged.RemoveDynamic(this, &UUISpinner_Base::HandleThemeChanged);
			}
		}
		bThemeBound = false;
	}
	Super::NativeDestruct();
}

void UUISpinner_Base::HandleThemeChanged(FName /*NewThemeId*/)
{
	RefreshUIStyle();
}