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// Copyright 2025 https://yuewu.dev/en All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "Engine/TimerHandle.h"
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#include "GIS_EquipmentInterface.h"
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#include "GIS_EquipmentStructLibrary.h"
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#include "GIS_EquipmentInstance.generated.h"
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class UGIS_EquipmentSystemComponent;
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class AActor;
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class APawn;
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struct FFrame;
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/**
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* Delegate triggered when the active state of the equipment instance changes.
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* 当装备实例的激活状态改变时触发的委托。
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* @param bNewState The new active state of the equipment. 装备的新激活状态。
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*/
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DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FGIS_ActiveStateChangedSignature, bool, bNewState);
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/**
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* An equipment instance is a UObject tasked with managing the internal logic and runtime states of equipment.
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* 装备实例是一个UObject，负责管理装备的内部逻辑和运行时状态。
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* @attention This is the default implementation of EquipmentInterface. You can use other types of classes as equipment.
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* @注意 这是EquipmentInterface的默认实现，你可以使用其他类作为装备实例。
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*/
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UCLASS(BlueprintType, Blueprintable)
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class GENERICINVENTORYSYSTEM_API UGIS_EquipmentInstance : public UObject, public IGIS_EquipmentInterface
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{
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GENERATED_BODY()
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public:
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/**
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* Constructor for the equipment instance.
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* 装备实例的构造函数。
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* @param ObjectInitializer The object initializer. 对象初始化器。
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*/
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UGIS_EquipmentInstance(const FObjectInitializer& ObjectInitializer = FObjectInitializer::Get());
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//~UObject interface
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/**
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* Checks if the equipment instance supports networking.
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* 检查装备实例是否支持网络。
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* @return True if networking is supported, false otherwise. 如果支持网络则返回true，否则返回false。
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*/
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virtual bool IsSupportedForNetworking() const override;
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/**
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* Gets the world this equipment instance belongs to.
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* 获取装备实例所属的世界。
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* @return The world, or nullptr if not set. 世界，如果未设置则返回nullptr。
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*/
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virtual UWorld* GetWorld() const override final;
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/**
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* Gets the properties that should be replicated for this object.
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* 获取需要为此对象复制的属性。
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* @param OutLifetimeProps Array to store the replicated properties. 存储复制属性的数组。
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*/
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virtual void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
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//~End of UObject interface
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// Begin IGIS_EquipmentInterface interface
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virtual APawn* GetOwningPawn_Implementation() const override;
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virtual UGIS_ItemInstance* GetSourceItem_Implementation() const override;
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virtual bool IsEquipmentActive_Implementation() const override;
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//EndIGIS_EquipmentInterface interface
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/**
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* Gets the owning pawn cast to a specific type.
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* 获取转换为特定类型的所属Pawn。
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* @param PawnType The desired pawn class. 期望的Pawn类。
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* @return The owning pawn cast to the specified type, or nullptr if not valid. 转换为指定类型的所属Pawn，如果无效则返回nullptr。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GIS|EquipmentInstance", meta=(DeterminesOutputType=PawnType))
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APawn* GetTypedOwningPawn(TSubclassOf<APawn> PawnType) const;
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/**
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* Determines if the equipment can be activated. Override in Blueprint for custom logic.
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* 判断装备是否可以激活，可在蓝图中重写以实现自定义逻辑。
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* @return True if the equipment can be activated, false otherwise. 如果装备可以激活则返回true，否则返回false。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, BlueprintNativeEvent, Category="GIS|EquipmentInstance")
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bool CanActivate() const;
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/**
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* Gets all actors spawned by this equipment instance.
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* 获取由此装备实例生成的所有Actor。
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* @return Array of spawned actors. 生成的Actor数组。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GIS|EquipmentInstance")
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TArray<AActor*> GetEquipmentActors() const { return EquipmentActors; }
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/**
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* Get the index of specified equipment actor managed by this equipment instance.获取由此装备实例所管理的装备Actor的下标。
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* @param InEquipmentActor The equipment actor of this equipment instance. 此装备实例的其中一个装备Actor。
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* @return -1 if passed-in actor not created by this instance. 如果传入Actor不是该EquipmentInstance创建的。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GIS|EquipmentInstance")
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int32 GetIndexOfEquipmentActor(const AActor* InEquipmentActor) const;
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/**
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* Gets the first spawned actor matching the desired class (including subclasses).
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* 获取第一个匹配指定类型（包括子类）的由装备实例生成的Actor。
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* @param DesiredClass The desired actor class. 期望的Actor类。
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* @return The matching actor, or nullptr if not found. 匹配的Actor，如果未找到则返回nullptr。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GIS|EquipmentInstance", meta=(DeterminesOutputType="DesiredClass", DynamicOutputParam="ReturnValue"))
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AActor* GetTypedEquipmentActor(TSubclassOf<AActor> DesiredClass) const;
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/**
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* Event triggered when the active state of the equipment changes.
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* 装备激活状态改变时触发的事件。
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*/
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UPROPERTY(BlueprintAssignable, Category="EquipmentInstance")
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FGIS_ActiveStateChangedSignature OnActiveStateChangedEvent;
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protected:
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// Begin IGIS_EquipmentInterface interface
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virtual void ReceiveOwningPawn_Implementation(APawn* NewPawn) override;
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virtual void ReceiveSourceItem_Implementation(UGIS_ItemInstance* NewItem) override;
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virtual void OnEquipmentBeginPlay_Implementation() override;
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virtual void OnEquipmentTick_Implementation(float DeltaSeconds) override;
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virtual void OnEquipmentEndPlay_Implementation() override;
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virtual void OnActiveStateChanged_Implementation(bool NewActiveState) override;
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//EndIGIS_EquipmentInterface interface
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protected:
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#if UE_WITH_IRIS
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/**
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* Registers replication fragments for networking (Iris-specific).
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* 为网络注册复制片段（特定于Iris）。
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* @param Context The fragment registration context. 片段注册上下文。
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* @param RegistrationFlags The registration flags. 注册标志。
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*/
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virtual void RegisterReplicationFragments(UE::Net::FFragmentRegistrationContext& Context, UE::Net::EFragmentRegistrationFlags RegistrationFlags) override;
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#endif // UE_WITH_IRIS
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/**
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* Gets the scene component to which spawned actors will attach.
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* 获取生成Actor将附加到的场景组件。
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* @param Pawn The pawn owning this equipment instance. 拥有此装备实例的Pawn。
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* @return The scene component to attach to, or nullptr if not applicable. 要附加到的场景组件，如果不适用则返回nullptr。
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*/
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UFUNCTION(BlueprintCallable, BlueprintNativeEvent, BlueprintPure, Category="GIS|EquipmentInstance")
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USceneComponent* GetAttachParentForSpawnedActors(APawn* Pawn) const;
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#pragma region Equipment Actors
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/**
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* Spawns and sets up actors associated with this equipment instance.
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* 生成并设置与此装备实例关联的Actor。
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* @param ActorsToSpawn The actors to spawn. 要生成的Actor。
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*/
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virtual void SpawnAndSetupEquipmentActors(const TArray<FGIS_EquipmentActorToSpawn>& ActorsToSpawn);
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/**
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* Destroys all actors associated with this equipment instance.
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* 销毁与此装备实例关联的所有Actor。
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*/
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virtual void DestroyEquipmentActors();
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/**
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* Called before an actor is spawned to allow additional setup.
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* 在Actor生成前调用以允许额外设置。
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* @param SpawningActor The actor about to be spawned. 即将生成的Actor。
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*/
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UFUNCTION(BlueprintNativeEvent, Category="GIS|EquipmentInstance")
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void BeforeSpawningActor(AActor* SpawningActor) const;
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/**
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* Sets up actors after they have been spawned.
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* 在Actor生成后进行设置。
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* @param InActors The spawned actors to configure. 已生成的Actor，需进行配置。
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*/
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UFUNCTION(BlueprintNativeEvent, Category="GIS|EquipmentInstance")
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void SetupEquipmentActors(const TArray<AActor*>& InActors);
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/**
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* Implementation of SetupEquipmentActors.
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* SetupEquipmentActors 的实现。
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* @param InActors The spawned actors to configure. 已生成的Actor，需进行配置。
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*/
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virtual void SetupEquipmentActors_Implementation(const TArray<AActor*>& InActors);
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/**
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* Called when the equipment actors are replicated.
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* 装备Actor复制时调用。
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*/
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UFUNCTION()
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void OnRep_EquipmentActors();
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/**
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* Checks if the specified number of equipment actors is valid.
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* 检查指定数量的装备Actor是否有效。
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* @param Num The number of actors to check. 要检查的Actor数量。
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* @return True if the number of actors is valid, false otherwise. 如果Actor数量有效则返回true，否则返回false。
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*/
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bool IsEquipmentActorsValid(int32 Num) const;
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/**
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* Propagates initial state to all equipment actors.
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* 将初始状态传播到所有装备Actor。
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* @param InActors The actors to set up. 要设置的Actor。
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*/
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virtual void SetupInitialStateForEquipmentActors(const TArray<AActor*>& InActors);
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/**
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* Propagates active state to all equipment actors.
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* 将激活状态传播到所有装备Actor。
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* @param InActors The actors to set up. 要设置的Actor。
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*/
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virtual void SetupActiveStateForEquipmentActors(const TArray<AActor*>& InActors) const;
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#pragma endregion
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protected:
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/**
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* The pawn that owns this equipment instance.
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* 拥有此装备实例的Pawn。
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*/
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UPROPERTY(VisibleInstanceOnly, BlueprintReadOnly, Category="EquipmentInstance")
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TObjectPtr<APawn> OwningPawn;
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/**
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* The source item associated with this equipment instance.
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* 与此装备实例关联的源道具。
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*/
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UPROPERTY(VisibleInstanceOnly, BlueprintReadOnly, Category="EquipmentInstance")
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TObjectPtr<UGIS_ItemInstance> SourceItem;
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/**
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* Indicates whether the equipment instance is currently active.
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* 指示装备实例当前是否处于激活状态。
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*/
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UPROPERTY(VisibleInstanceOnly, BlueprintReadOnly, Category="EquipmentInstance")
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bool bIsActive;
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/**
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* Array of actors spawned by this equipment instance.
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* 由此装备实例生成的Actor数组。
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*/
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UPROPERTY(VisibleInstanceOnly, BlueprintReadOnly, Category="EquipmentInstance", ReplicatedUsing=OnRep_EquipmentActors)
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TArray<TObjectPtr<AActor>> EquipmentActors;
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};
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