using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;

[RequireComponent(typeof(Image))]
public class SwapButton : MonoBehaviour, IPointerClickHandler
{
    public Image TargetImage;

    public Sprite ASprite;
    public UnityEvent ClickEventA = new UnityEvent();

    public Sprite BSprite;
    public UnityEvent ClickEventB = new UnityEvent();

    [SerializeField] private bool _trueA_FalseB = true;

    public bool TrueA_FalseB
    {
        get => _trueA_FalseB;
        set
        {
            _trueA_FalseB = value;
            UpdateVisual(); // 값이 바뀔 때마다 자동으로 실행!
        }
    }

    private void Awake()
    {
        TargetImage = GetComponent<Image>();
    }

    public void OnPointerClick(PointerEventData eventData)
    {
        TrueA_FalseB = !TrueA_FalseB;

        if (TrueA_FalseB)
            ClickEventA?.Invoke();
        else
            ClickEventB?.Invoke();
    }

    private void OnValidate()
    {
        UpdateVisual();
    }
    public void UpdateVisual()
    {
        if (TargetImage == null) return;
        TargetImage.sprite = _trueA_FalseB ? ASprite : BSprite;
    }
}