 // Fill out your copyright notice in the Description page of Project Settings.
 
#pragma once
 
#include "CoreMinimal.h"
#include "AbilityTask_MoveCharacterToLocation.h"
#include "AbilityTask_FollowCursor.generated.h"
 
/**
 * Simple delegate for callbacks on FollowCursor tasks.
 */
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FFollowCursorSimpleDelegate);
 
/**
 * AbilityTask that sends movement input to the Avatar Pawn pointing from the Avatar Pawn to the location under the
 * cursor. Stops once Avatar Pawn reaches an XY distance within a specified threshold.
 */
UCLASS()
class DANDELION_API UAbilityTask_FollowCursor : public UAbilityTask
{
	GENERATED_BODY()
 
public:
	/**
	 * Callback raised when the Avatar Pawn reaches an XY distance within a specified threshold.
	 */
	UPROPERTY(BlueprintAssignable)
	FFollowCursorSimpleDelegate OnMoveComplete;
 
	/**
	 * Enables ticking.
	 */
	UAbilityTask_FollowCursor();
 
	/**
	 * Static constructor that initializes cached references and sets passed in parameters.
	 * @param OwningAbility The GA that initiated this task.
	 * @param TaskInstanceName The name of this task.
	 * @param StopDistance The XY distance that Avatar Pawn needs to befrom the TargetLocation in order to stop. 
	 * @return A newly instantiated and initialized UAbilityTask_FollowCursor.
	 */
	UFUNCTION(
		BlueprintCallable,
		Category = "Ability|Tasks",
		meta = (HidePin = "OwningAbility", DefaultToSelf = "OwningAbility", BlueprintInternalUseOnly = "TRUE")
	)
	static UAbilityTask_FollowCursor* FollowCursor(
		UDandelionGameplayAbility* OwningAbility,
		FName TaskInstanceName,
		float StopDistance = 0.f
	);
 
	/**
	 * If this task is ever externally cancelled, stop any current player movement.
	 */
	virtual void ExternalCancel() override;
 
protected:
	/**
	 * When this task activates, stop any current movement on the PlayerController.
	 */
	virtual void Activate() override;
 
	/**
	 * Update the target location, and check to see if it's within the stop distance. End the task if so, otherwise send
	 * movement input to the PlayerController.
	 * @param DeltaTime The amount of time that has elapsed since this was last ticked.
	 */
	virtual void TickTask(float DeltaTime) override;
 
private:
	/**
	 * Cached reference to the Pawn that was the Avatar Actor for the initiating GA.
	 */
	UPROPERTY(Transient)
	TObjectPtr<APawn> PlayerPawn;
 
	/**
	 * Cached reference to the PlayerController that possessed the Avatar Actor for the initiating GA.
	 */
	UPROPERTY(Transient)
	TObjectPtr<ADandelionPlayerController> PlayerController;
 
	/**
	 * The current world location this task is trying to move to.
	 */
	FVector TargetLocation;
 
	/**
	 * The XY distance that Avatar Pawn needs to befrom the TargetLocation in order to stop.
	 */
	float StopDistance = 0.f;
 
	/**
	 * Helper method that updates the TargetLocation with the hit result under the cursor if a hit was encountered.
	 */
	void UpdateTargetLocation();
};

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

	#pragma once

	#include "CoreMinimal.h"
	#include "AbilityTask_MoveCharacterToLocation.h"
	#include "AbilityTask_FollowCursor.generated.h"

	/**
	* Simple delegate for callbacks on FollowCursor tasks.
	*/
	DECLARE_DYNAMIC_MULTICAST_DELEGATE(FFollowCursorSimpleDelegate);

	/**
	* AbilityTask that sends movement input to the Avatar Pawn pointing from the Avatar Pawn to the location under the
	* cursor. Stops once Avatar Pawn reaches an XY distance within a specified threshold.
	*/
	UCLASS()
	class DANDELION_API UAbilityTask_FollowCursor : public UAbilityTask
	{
	GENERATED_BODY()

	public:
	/**
	* Callback raised when the Avatar Pawn reaches an XY distance within a specified threshold.
	*/
	UPROPERTY(BlueprintAssignable)
	FFollowCursorSimpleDelegate OnMoveComplete;

	/**
	* Enables ticking.
	*/
	UAbilityTask_FollowCursor();

	/**
	* Static constructor that initializes cached references and sets passed in parameters.
	* @param OwningAbility The GA that initiated this task.
	* @param TaskInstanceName The name of this task.
	* @param StopDistance The XY distance that Avatar Pawn needs to befrom the TargetLocation in order to stop.
	* @return A newly instantiated and initialized UAbilityTask_FollowCursor.
	*/
	UFUNCTION(
	BlueprintCallable,
	Category = "Ability\|Tasks",
	meta = (HidePin = "OwningAbility", DefaultToSelf = "OwningAbility", BlueprintInternalUseOnly = "TRUE")
	)
	static UAbilityTask_FollowCursor* FollowCursor(
	UDandelionGameplayAbility* OwningAbility,
	FName TaskInstanceName,
	float StopDistance = 0.f
	);

	/**
	* If this task is ever externally cancelled, stop any current player movement.
	*/
	virtual void ExternalCancel() override;

	protected:
	/**
	* When this task activates, stop any current movement on the PlayerController.
	*/
	virtual void Activate() override;

	/**
	* Update the target location, and check to see if it's within the stop distance. End the task if so, otherwise send
	* movement input to the PlayerController.
	* @param DeltaTime The amount of time that has elapsed since this was last ticked.
	*/
	virtual void TickTask(float DeltaTime) override;

	private:
	/**
	* Cached reference to the Pawn that was the Avatar Actor for the initiating GA.
	*/
	UPROPERTY(Transient)
	TObjectPtr<APawn> PlayerPawn;

	/**
	* Cached reference to the PlayerController that possessed the Avatar Actor for the initiating GA.
	*/
	UPROPERTY(Transient)
	TObjectPtr<ADandelionPlayerController> PlayerController;

	/**
	* The current world location this task is trying to move to.
	*/
	FVector TargetLocation;

	/**
	* The XY distance that Avatar Pawn needs to befrom the TargetLocation in order to stop.
	*/
	float StopDistance = 0.f;

	/**
	* Helper method that updates the TargetLocation with the hit result under the cursor if a hit was encountered.
	*/
	void UpdateTargetLocation();
	};