#pragma once

#include "Blueprint/UserWidget.h"
#include "CoreMinimal.h"
#include "ZMMOAttributeTypes.h"
#include "ZMMOHudHpSpWidget.generated.h"

class UProgressBar;
class UTextBlock;
class UZMMOAttributeComponent;

/**
 *  Widget base do HUD de atributos (HP/SP/level). Spawnada por
 *  `AZMMOPlayerCharacter::BeginPlay` quando o pawn local virou autoritativo.
 *
 *  Layout (cor, textos, ancoras) vem do WBP filho via UMG.
 *  Comportamento (binding com AttributeComponent + refresh on delegate)
 *  vive aqui em C++ — permite que outros modulos consumam esta API
 *  sem precisar abrir o WBP. Sub-classe via Blueprint apenas para skin
 *  visual e disposicao dos sub-widgets.
 *
 *  Convencao `meta=(BindWidget)`: o WBP filho DEVE ter widgets com os
 *  mesmos nomes (HpBar, SpBar). `BindWidgetOptional` permite ao WBP
 *  omitir o widget (ex.: HUD compacto sem texto numerico).
 */
UCLASS(Abstract, Blueprintable, BlueprintType)
class ZMMOATTRIBUTES_API UZMMOHudHpSpWidget : public UUserWidget
{
	GENERATED_BODY()

public:
	/**
	 *  Liga o widget a um `UZMMOAttributeComponent`. Subscreve aos delegates
	 *  e faz um refresh imediato com o snapshot corrente. Idempotente —
	 *  chamar com outro componente desliga do anterior.
	 *  Se `InComponent` for nullptr, desliga sem religar.
	 */
	UFUNCTION(BlueprintCallable, Category = "Zeus|HUD")
	void BindToAttributeComponent(UZMMOAttributeComponent* InComponent);

	UFUNCTION(BlueprintPure, Category = "Zeus|HUD")
	UZMMOAttributeComponent* GetBoundComponent() const { return BoundComponent.Get(); }

protected:
	virtual void NativeDestruct() override;

	/**
	 *  Hook BlueprintNativeEvent para skin visual reagir a um snapshot novo
	 *  (cores, animacao de level up, etc.). Implementacao default em C++
	 *  apenas atualiza progress bars + textos via `BindWidget`/`BindWidgetOptional`.
	 */
	UFUNCTION(BlueprintNativeEvent, Category = "Zeus|HUD")
	void OnSnapshotApplied(const FZMMOAttributesSnapshot& Snapshot);
	virtual void OnSnapshotApplied_Implementation(const FZMMOAttributesSnapshot& Snapshot);

	UFUNCTION(BlueprintNativeEvent, Category = "Zeus|HUD")
	void OnHpSpDelta(int32 Hp, int32 Sp);
	virtual void OnHpSpDelta_Implementation(int32 Hp, int32 Sp);

	// === BindWidget — devem existir no WBP com EXATAMENTE estes nomes ===
	UPROPERTY(BlueprintReadOnly, meta = (BindWidget), Category = "Zeus|HUD")
	UProgressBar* HpBar = nullptr;

	UPROPERTY(BlueprintReadOnly, meta = (BindWidget), Category = "Zeus|HUD")
	UProgressBar* SpBar = nullptr;

	UPROPERTY(BlueprintReadOnly, meta = (BindWidgetOptional), Category = "Zeus|HUD")
	UTextBlock* HpText = nullptr;

	UPROPERTY(BlueprintReadOnly, meta = (BindWidgetOptional), Category = "Zeus|HUD")
	UTextBlock* SpText = nullptr;

	UPROPERTY(BlueprintReadOnly, meta = (BindWidgetOptional), Category = "Zeus|HUD")
	UTextBlock* LevelText = nullptr;

private:
	UFUNCTION()
	void HandleAttributesChanged(const FZMMOAttributesSnapshot& Snapshot);

	UFUNCTION()
	void HandleHpSpChanged(int32 Hp, int32 Sp);

	UPROPERTY()
	TWeakObjectPtr<UZMMOAttributeComponent> BoundComponent;
};