// Copyright (c) 2026 Reignance Studios. MIT License, see LICENSE.

#pragma once

#include "CoreMinimal.h"
#include "AbilitySystemComponent.h"
#include "AttributeSet.h"
#include "GKLAttributeSet.generated.h"

#define GKL_ATTRIBUTE_ACCESSORS(ClassName, PropertyName) \
	GAMEPLAYATTRIBUTE_PROPERTY_GETTER(ClassName, PropertyName) \
	GAMEPLAYATTRIBUTE_VALUE_GETTER(PropertyName) \
	GAMEPLAYATTRIBUTE_VALUE_SETTER(PropertyName) \
	GAMEPLAYATTRIBUTE_VALUE_INITTER(PropertyName)

/**
 * Health, Stamina and Mana for a multiplayer player.
 *
 * - Every gameplay attribute replicates with an OnRep that calls GAMEPLAYATTRIBUTE_REPNOTIFY,
 *   registered with REPNOTIFY_Always, so predicted values on the owning client are confirmed.
 * - Values are clamped twice: PreAttributeChange clamps what queries return, and
 *   PostGameplayEffectExecute clamps the base value that instant and periodic effects change.
 * - Damage is a server-only meta attribute: effects add to it, PostGameplayEffectExecute
 *   moves it into Health and sends Event.Death when Health reaches 0.
 */
UCLASS()
class GASKITLITE_API UGKLAttributeSet : public UAttributeSet
{
	GENERATED_BODY()

public:
	UGKLAttributeSet();

	virtual void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
	virtual void PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue) override;
	virtual void PostGameplayEffectExecute(const FGameplayEffectModCallbackData& Data) override;

	/** Server only. Refills Health, Stamina and Mana and re-arms the death event. Called on respawn. */
	void ResetToMax();

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Health", ReplicatedUsing = OnRep_Health)
	FGameplayAttributeData Health;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Health)

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Health", ReplicatedUsing = OnRep_MaxHealth)
	FGameplayAttributeData MaxHealth;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxHealth)

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Stamina", ReplicatedUsing = OnRep_Stamina)
	FGameplayAttributeData Stamina;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Stamina)

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Stamina", ReplicatedUsing = OnRep_MaxStamina)
	FGameplayAttributeData MaxStamina;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxStamina)

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Mana", ReplicatedUsing = OnRep_Mana)
	FGameplayAttributeData Mana;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Mana)

	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Mana", ReplicatedUsing = OnRep_MaxMana)
	FGameplayAttributeData MaxMana;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxMana)

	/** Meta attribute, server only, not replicated. */
	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite|Damage")
	FGameplayAttributeData Damage;
	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Damage)

protected:
	UFUNCTION()
	void OnRep_Health(const FGameplayAttributeData& OldValue);
	UFUNCTION()
	void OnRep_MaxHealth(const FGameplayAttributeData& OldValue);
	UFUNCTION()
	void OnRep_Stamina(const FGameplayAttributeData& OldValue);
	UFUNCTION()
	void OnRep_MaxStamina(const FGameplayAttributeData& OldValue);
	UFUNCTION()
	void OnRep_Mana(const FGameplayAttributeData& OldValue);
	UFUNCTION()
	void OnRep_MaxMana(const FGameplayAttributeData& OldValue);

private:
	bool bOutOfHealth = false;
};