using UnityEngine;
using UnityEngine.XR.Interaction.Toolkit;

// 假设命名空间是 LevelUp.GrabInteractions
namespace LevelUp.GrabInteractions 
{
    // 基础类，负责事件监听和延迟调用
    [RequireComponent(typeof(UnityEngine.XR.Interaction.Toolkit.Interactables.XRGrabInteractable))]
    public class ResetObject : MonoBehaviour
    {
        [Header("基础重置设置")]
        [Tooltip("物体返回原位之前的延迟时间 (秒)。")]
        [SerializeField]
        protected float resetDelayTime = 3f;

        // 核心字段
        protected UnityEngine.XR.Interaction.Toolkit.Interactables.XRGrabInteractable m_GrabInteractable;
        protected Vector3 returnToPosition;
        
        [Tooltip("指示物体是否应该被重置。子类可用于逻辑判断。")]
        public bool shouldReturnHome { get; protected set; } = true;

       protected void Awake()
        {
            m_GrabInteractable = GetComponent<UnityEngine.XR.Interaction.Toolkit.Interactables.XRGrabInteractable>();
        }

       protected void Start()
        {
            // 记录物体在场景中的初始位置
            returnToPosition = this.transform.position;
        }

        void OnEnable()
        {
            if (m_GrabInteractable != null)
            {
                m_GrabInteractable.selectExited.AddListener(OnSelectExit);
                m_GrabInteractable.selectEntered.AddListener(OnSelect);
            }
        }
        
        void OnDisable()
        {
             if (m_GrabInteractable != null)
            {
                m_GrabInteractable.selectExited.RemoveListener(OnSelectExit);
                m_GrabInteractable.selectEntered.RemoveListener(OnSelect);
            }
            CancelInvoke(nameof(ReturnHome));
        }

        protected virtual void OnSelect(SelectEnterEventArgs arg0)
        {
            // 抓取时取消任何待执行的 ReturnHome 调用
            CancelInvoke(nameof(ReturnHome)); 
        }

        protected virtual void OnSelectExit(SelectExitEventArgs arg0)
        {
            // 松手时延迟调用 ReturnHome
            Invoke(nameof(ReturnHome), resetDelayTime); 
        }
        
        /// <summary>
        /// 核心重置函数。设置为 virtual 以便子类重写。
        /// 默认实现为瞬移。
        /// </summary>
        protected virtual void ReturnHome()
        {
            if (shouldReturnHome)
            {
                // 父类的默认实现是瞬移
                transform.position = returnToPosition; 
                Debug.Log($"物体 '{gameObject.name}' 已瞬移重置到原点。", this);
            }
        }
    }
}