using DG.Tweening;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace UI
{
    public class SelectableItem : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
    {
        [SerializeField] private Image _bgImage;

        [SerializeField] private float _fadeDuration;

        [SerializeField] private bool _allowFade = true;

        private Sequence _fadeSequence;

        public UnityEvent _onSelect;

        public UnityEvent _onDeselect;

        public void OnPointerEnter(PointerEventData eventData)
        {
            KillFadeSequence();

            if (_allowFade)
            {
                _fadeSequence = DOTween.Sequence();
                _fadeSequence.Append(_bgImage.DOFade(1, _fadeDuration));
            }

            _onSelect.Invoke();
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            KillFadeSequence();

            if (_allowFade)
            {
                _fadeSequence = DOTween.Sequence();
                _fadeSequence.Append(_bgImage.DOFade(0, _fadeDuration));
            }

            _onDeselect.Invoke();
        }

        private void KillFadeSequence()
        {
            if (_fadeSequence != null && _fadeSequence.IsActive())
            {
                _fadeSequence.Kill();
            }
        }
    }
}