 // Fill out your copyright notice in the Description page of Project Settings.
 
#pragma once
 
#include "CoreMinimal.h"
#include "AITypes.h"
#include "Abilities/Tasks/AbilityTask.h"
#include "Navigation/PathFollowingComponent.h"
#include "AbilityTask_MoveCharacterToLocation.generated.h"
 
class UPathFollowingComponent;
class ADandelionPlayerController;
class UDandelionGameplayAbility;
 
/**
 * Simple delegate for callbacks on MoveToLocation tasks.
 * @param PathingResultType The result type of the pathing request.
 */
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(
	FMoveToLocationSimpleDelegate,
	EPathFollowingResult::Type,
	PathingResultType
);
 
/**
 * Abstract base class for moving a character to a particular world location, raising desired events on completion, and
 * ending the task appropriately. Implementers need to handle setting the actual target location explicitly. Uses the
 * navigation system for character movement.
 */
UCLASS(Abstract)
class DANDELION_API UAbilityTask_MoveCharacterToLocation : public UAbilityTask
{
	GENERATED_BODY()
 
public:
	/**
	 * Callback that is issued once the NavSystem indicates the TargetLocation has been reached.
	 */
	UPROPERTY(BlueprintAssignable)
	FMoveToLocationSimpleDelegate OnMoveComplete;
 
	/**
	 * Disables ticking.
	 */
	UAbilityTask_MoveCharacterToLocation();
 
	/**
	 * Static constructor. Initializes cached references when called.
	 * @param OwningAbility The GA that initiated this task.
	 * @param TaskInstanceName The name of this task.
	 * @return A newly instantiated and initialized UAbilityTask_MoveCharacterToLocation.
	 */
	UFUNCTION(
		BlueprintCallable,
		Category = "Ability|Tasks",
		meta = (HidePin = "OwningAbility", DefaultToSelf = "OwningAbility", BlueprintInternalUseOnly = "TRUE")
	)
	static UAbilityTask_MoveCharacterToLocation* MoveCharacterToLocation(
		UDandelionGameplayAbility* OwningAbility,
		const FName TaskInstanceName
	);
 
	/**
	 * Simple getter for the TargetLocation vector.
	 * @return The value of the TargetLocation vector.
	 */
	FVector GetTargetLocation() const;
 
	/**
     * If something other than the internal completion of this task causes it to end, stop movement immediately.
     */
	virtual void ExternalCancel() override;
 
protected:
	/**
	 * Cached reference to the PlayerController that possessed the Avatar Actor on the GA that initiated this task.
	 */
	UPROPERTY(Transient)
	TObjectPtr<ADandelionPlayerController> PlayerController;
 
	/**
	 * The location this task it attempting to move to.
	 */
	FVector TargetLocation;
 
	/**
	 * Stops any currently ongoing movement and starts a new pathing request for the NavSystem. Binds
	 * HandleOnRequestFinished to the RequestFinished callback on the NavSystem.
	 */
	virtual void Activate() override;
 
	/**
	 * Cleans up the delegate binding that was created in Activate.
	 * @param bInOwnerFinished If the TaskOwner finishing resulted in this callback.
	 */
	virtual void OnDestroy(bool bInOwnerFinished) override;
 
	/**
	 * Helper function that acquires cached references to the PlayerController and the PathFollowingComponent.
	 * @param OwningAbility The GA that initiated this task.
	 */
	void InitializeBaseMoveTask(const UDandelionGameplayAbility* OwningAbility);
	
 
private:
	/**
	 * Cached reference to the PathFollowingComponent on the PlayerController that possessed the Avatar Actor on the GA
	 * that initiated this task.
	 */
	UPROPERTY(Transient)
	TObjectPtr<UPathFollowingComponent> PlayerPathFollowingComponent;
 
	/**
	 * Cached value from when the pathing request is made to the NavSystem so that HandleOnRequestFinished can respond
	 * to the correct pathing request.
	 */
	FAIRequestID PathRequestID;
 
	/**
	 * Cached delegate binding to clean up the HandleOnRequestFinished binding once this task exits.
	 */
	FDelegateHandle HandleOnRequestFinishedBinding;
 
	/**
	 * Simple handler for OnRequestFinished callback. If the ID matches, broadcast to the GA so that it can respond
	 * appropriately. The owning GA needs to be in charge of ultimately shutting this task down.
	 * @param AIRequestID The ID for the pathing request that got completed.
	 * @param Result Data describing the result/outcome of the pathing request.
	 */
	void HandleOnRequestFinished(const FAIRequestID& AIRequestID, const FPathFollowingResult& Result) const;
};

	// Fill out your copyright notice in the Description page of Project Settings.

	#pragma once

	#include "CoreMinimal.h"
	#include "AITypes.h"
	#include "Abilities/Tasks/AbilityTask.h"
	#include "Navigation/PathFollowingComponent.h"
	#include "AbilityTask_MoveCharacterToLocation.generated.h"

	class UPathFollowingComponent;
	class ADandelionPlayerController;
	class UDandelionGameplayAbility;

	/**
	* Simple delegate for callbacks on MoveToLocation tasks.
	* @param PathingResultType The result type of the pathing request.
	*/
	DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(
	FMoveToLocationSimpleDelegate,
	EPathFollowingResult::Type,
	PathingResultType
	);

	/**
	* Abstract base class for moving a character to a particular world location, raising desired events on completion, and
	* ending the task appropriately. Implementers need to handle setting the actual target location explicitly. Uses the
	* navigation system for character movement.
	*/
	UCLASS(Abstract)
	class DANDELION_API UAbilityTask_MoveCharacterToLocation : public UAbilityTask
	{
	GENERATED_BODY()

	public:
	/**
	* Callback that is issued once the NavSystem indicates the TargetLocation has been reached.
	*/
	UPROPERTY(BlueprintAssignable)
	FMoveToLocationSimpleDelegate OnMoveComplete;

	/**
	* Disables ticking.
	*/
	UAbilityTask_MoveCharacterToLocation();

	/**
	* Static constructor. Initializes cached references when called.
	* @param OwningAbility The GA that initiated this task.
	* @param TaskInstanceName The name of this task.
	* @return A newly instantiated and initialized UAbilityTask_MoveCharacterToLocation.
	*/
	UFUNCTION(
	BlueprintCallable,
	Category = "Ability\|Tasks",
	meta = (HidePin = "OwningAbility", DefaultToSelf = "OwningAbility", BlueprintInternalUseOnly = "TRUE")
	)
	static UAbilityTask_MoveCharacterToLocation* MoveCharacterToLocation(
	UDandelionGameplayAbility* OwningAbility,
	const FName TaskInstanceName
	);

	/**
	* Simple getter for the TargetLocation vector.
	* @return The value of the TargetLocation vector.
	*/
	FVector GetTargetLocation() const;

	/**
	* If something other than the internal completion of this task causes it to end, stop movement immediately.
	*/
	virtual void ExternalCancel() override;

	protected:
	/**
	* Cached reference to the PlayerController that possessed the Avatar Actor on the GA that initiated this task.
	*/
	UPROPERTY(Transient)
	TObjectPtr<ADandelionPlayerController> PlayerController;

	/**
	* The location this task it attempting to move to.
	*/
	FVector TargetLocation;

	/**
	* Stops any currently ongoing movement and starts a new pathing request for the NavSystem. Binds
	* HandleOnRequestFinished to the RequestFinished callback on the NavSystem.
	*/
	virtual void Activate() override;

	/**
	* Cleans up the delegate binding that was created in Activate.
	* @param bInOwnerFinished If the TaskOwner finishing resulted in this callback.
	*/
	virtual void OnDestroy(bool bInOwnerFinished) override;

	/**
	* Helper function that acquires cached references to the PlayerController and the PathFollowingComponent.
	* @param OwningAbility The GA that initiated this task.
	*/
	void InitializeBaseMoveTask(const UDandelionGameplayAbility* OwningAbility);


	private:
	/**
	* Cached reference to the PathFollowingComponent on the PlayerController that possessed the Avatar Actor on the GA
	* that initiated this task.
	*/
	UPROPERTY(Transient)
	TObjectPtr<UPathFollowingComponent> PlayerPathFollowingComponent;

	/**
	* Cached value from when the pathing request is made to the NavSystem so that HandleOnRequestFinished can respond
	* to the correct pathing request.
	*/
	FAIRequestID PathRequestID;

	/**
	* Cached delegate binding to clean up the HandleOnRequestFinished binding once this task exits.
	*/
	FDelegateHandle HandleOnRequestFinishedBinding;

	/**
	* Simple handler for OnRequestFinished callback. If the ID matches, broadcast to the GA so that it can respond
	* appropriately. The owning GA needs to be in charge of ultimately shutting this task down.
	* @param AIRequestID The ID for the pathing request that got completed.
	* @param Result Data describing the result/outcome of the pathing request.
	*/
	void HandleOnRequestFinished(const FAIRequestID& AIRequestID, const FPathFollowingResult& Result) const;
	};