using UnityEngine;
using UnityEngine.EventSystems;

public class JoystickController : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
{
    [Header("Joystick UI")]
    public RectTransform background;
    public RectTransform handle;

    [Header("Output")]
    public Vector2 arahInput;

    private float radius;

    private void Start()
    {
        if (background == null)
        {
            background = GetComponent<RectTransform>();
        }

        radius = background.sizeDelta.x / 2f;

        if (handle != null)
        {
            handle.anchoredPosition = Vector2.zero;
        }
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        OnDrag(eventData);
    }

    public void OnDrag(PointerEventData eventData)
    {
        Vector2 posisiSentuh;

        RectTransformUtility.ScreenPointToLocalPointInRectangle(
            background,
            eventData.position,
            eventData.pressEventCamera,
            out posisiSentuh
        );

        posisiSentuh = Vector2.ClampMagnitude(posisiSentuh, radius);

        if (handle != null)
        {
            handle.anchoredPosition = posisiSentuh;
        }

        arahInput = posisiSentuh / radius;
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        arahInput = Vector2.zero;

        if (handle != null)
        {
            handle.anchoredPosition = Vector2.zero;
        }
    }
}