using UnityEngine;
using UnityEngine.XR.Interaction.Toolkit;
using UnityEngine.XR.Interaction.Toolkit.Interactables;
using HighlightPlus;

namespace VRShopping.Interact
{
    /// <summary>
    /// 호버 중이고 선택되지 않은 상태에서만 HighlightPlus 외곽선 표시.
    /// </summary>
    [RequireComponent(typeof(XRBaseInteractable))]
    [RequireComponent(typeof(HighlightEffect))]
    public class ItemHoverHighlight : MonoBehaviour
    {   
        private HighlightEffect _highlight;
        private XRBaseInteractable _interactable;

        private void Awake()
        {
            _interactable = GetComponent<XRBaseInteractable>();
            if (_highlight == null) _highlight = GetComponent<HighlightEffect>();
            _highlight.highlighted = false;
        }

        private void OnEnable()
        {
            _interactable.hoverEntered.AddListener(OnHoverEntered);
            _interactable.hoverExited.AddListener(OnHoverExited);
            _interactable.selectEntered.AddListener(OnSelectEntered);
            _interactable.selectExited.AddListener(OnSelectExited);
            Refresh();
        }

        private void OnDisable()
        {
            _interactable.hoverEntered.RemoveListener(OnHoverEntered);
            _interactable.hoverExited.RemoveListener(OnHoverExited);
            _interactable.selectEntered.RemoveListener(OnSelectEntered);
            _interactable.selectExited.RemoveListener(OnSelectExited);
            _highlight.highlighted = false;
        }

        private void OnHoverEntered(HoverEnterEventArgs _) => Refresh();
        private void OnHoverExited(HoverExitEventArgs _) => Refresh();
        private void OnSelectEntered(SelectEnterEventArgs _) => Refresh();
        private void OnSelectExited(SelectExitEventArgs _) => Refresh();

        private void Refresh()
        {
            // 잡지 않은 상태로 호버 중일 때만 하이라이트
            _highlight.highlighted = _interactable.isHovered && !_interactable.isSelected;
        }
    }
}