using AibisDream.Kit;
using UnityEngine;

namespace AibisDream.Framework
{
    public class EventSystemEx : SingletonBase<EventSystemEx>
    {
        public GameObject pointerOverObj;
        public GameObject draggingObj;
        public GameObject holdingObj;
        
        #region 事件触发中转

        public void OnPointerEnter(GameObject gameObject)
        {
            pointerOverObj = gameObject;
            EnumEventSystem.Global.Send(TriggerEnum.PointerEnter, gameObject);
        }

        public void OnPointerExit(GameObject gameObject)
        {
            EnumEventSystem.Global.Send(TriggerEnum.PointerExit, gameObject);
            if (pointerOverObj == gameObject)
            {
                pointerOverObj = null;
            }
        }

        public void OnPointerDown(GameObject gameObject)
        {
            EnumEventSystem.Global.Send(TriggerEnum.PointerDown, gameObject);
            holdingObj = gameObject;
        }

        public void OnPointerUp(GameObject gameObject)
        {
            EnumEventSystem.Global.Send(TriggerEnum.PointerUp, gameObject);
            if (holdingObj == gameObject)
            {
                holdingObj = null;
            }
        }

        #endregion
        
        #region 单例必须的代码

        private EventSystemEx()
        {
        }
        
        public override void OnSingletonInit()
        {
        }

        #endregion
    }
    
    public enum TriggerEnum
    {
        PointerEnter,
        PointerExit,
        PointerDown,
        PointerUp
    }
}