입력 처리(Input Mapping)

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "InputAction.h" // FInputActionValue를 위해 포함
#include "MyCharacter.generated.h"

// 미리 선언 (Forward Declarations)
class UInputMappingContext;
class UInputAction;

UCLASS()
class MYFIRSTCPPPROJECT_API AMyCharacter : public ACharacter
{
    GENERATED_BODY()

public:
    AMyCharacter();

protected:
    virtual void BeginPlay() override;

public:    
    virtual void Tick(float DeltaTime) override;

    // 입력 설정 함수를 오버라이드
    virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;

protected:
    // =============== Input System 관련 UPROPERTY 변수들 ===============
    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Input")
    UInputMappingContext* DefaultMappingContext;

    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Input")
    UInputAction* MoveAction;

    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Input")
    UInputAction* LookAction;

    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Input")
    UInputAction* JumpAction;

    // =============== Input Action 바인딩될 함수들 ===============
    void Move(const FInputActionValue& Value);
    void Look(const FInputActionValue& Value);
    void Jump();
    void StopJumping();
};

#include "MyCharacter.h"
#include "EnhancedInputSubsystems.h" // 핵심 서브시스템 포함
#include "EnhancedInputComponent.h"   // EnhancedInputComponent를 위해 포함
#include "GameFramework/SpringArmComponent.h" // 카메라 컴포넌트 추가 시 필요

AMyCharacter::AMyCharacter()
{
    PrimaryActorTick.bCanEverTick = true;

    // CharacterMovementComponent 설정 (ACharacter는 기본으로 가짐)
    GetCharacterMovement()->bOrientRotationToMovement = true; // 이동 방향으로 회전
    bUseControllerRotationYaw = false; // 컨트롤러 회전 사용 안 함 (캐릭터가 직접 회전하도록)

    // ... 다른 컴포넌트 설정 ...
}

void AMyCharacter::BeginPlay()
{
    Super::BeginPlay();

    // PlayerController를 가져와서 Enhanced Input Subsystem에 접근
    if (APlayerController* PlayerController = Cast<APlayerController>(Controller))
    {
        if (UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem<UEnhancedInputLocalPlayerSubsystem>(PlayerController->GetLocalPlayer()))
        {
            // DefaultMappingContext가 유효하다면 추가
            if (DefaultMappingContext)
            {
                Subsystem->AddMappingContext(DefaultMappingContext, 0); // 0은 우선순위 (높을수록 우선)
            }
        }
    }
}

// InputComponent에 입력 액션 바인딩
void AMyCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
    Super::SetupPlayerInputComponent(PlayerInputComponent);

    // EnhancedInputComponent로 캐스팅
    if (UEnhancedInputComponent* EnhancedInputComponent = Cast<UEnhancedInputComponent>(PlayerInputComponent))
    {
        // Move Action 바인딩
        if (MoveAction)
        {
            EnhancedInputComponent->BindAction(MoveAction, ETriggerEvent::Triggered, this, &AMyCharacter::Move);
        }

        // Look Action 바인딩
        if (LookAction)
        {
            EnhancedInputComponent->BindAction(LookAction, ETriggerEvent::Triggered, this, &AMyCharacter::Look);
        }

        // Jump Action 바인딩
        if (JumpAction)
        {
            EnhancedInputComponent->BindAction(JumpAction, ETriggerEvent::Started, this, &AMyCharacter::Jump);
            EnhancedInputComponent->BindAction(JumpAction, ETriggerEvent::Completed, this, &AMyCharacter::StopJumping);
        }
    }
}

// 이동 함수 구현
void AMyCharacter::Move(const FInputActionValue& Value)
{
    // 입력 값 (Vector2D)을 가져옵니다.
    FVector2D MovementVector = Value.Get<FVector2D>();

    if (Controller != nullptr)
    {
        // 컨트롤러의 YAW 회전을 기준으로 앞/뒤 방향을 가져옵니다.
        const FRotator Rotation = Controller->GetControlRotation();
        const FRotator YawRotation(0, Rotation.Yaw, 0);

        // 앞 방향 (Forward Vector)
        const FVector ForwardDirection = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::X);
        AddMovementInput(ForwardDirection, MovementVector.Y);

        // 오른쪽 방향 (Right Vector)
        const FVector RightDirection = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::Y);
        AddMovementInput(RightDirection, MovementVector.X);
    }
}

// 시점 변경 함수 구현
void AMyCharacter::Look(const FInputActionValue& Value)
{
    FVector2D LookAxisVector = Value.Get<FVector2D>();

    if (Controller != nullptr)
    {
        AddControllerYawInput(LookAxisVector.X);
        AddControllerPitchInput(LookAxisVector.Y);
    }
}

// 점프 함수 구현
void AMyCharacter::Jump()
{
    Super::Jump(); // ACharacter의 기본 점프 함수 호출
}

void AMyCharacter::StopJumping()
{
    Super::StopJumping(); // ACharacter의 기본 점프 정지 함수 호출
}