using AibisDream.Kit;
using UnityEngine;

namespace AibisDream.Framework
{
    public class EventSystemEx : SingletonBase<EventSystemEx>
    {
        #region 状态

        public bool isLocked;

        #endregion
        
        public GameObject pointerOverObj;
        public GameObject draggingObj;
        public GameObject holdingObj;
        
        #region 事件触发中转

        public void OnPointerEnter(IInteraction interaction)
        {
            pointerOverObj = interaction.GetGameObject();
            EnumEventSystem.Global.Send(TriggerEnum.PointerEnter, interaction);
        }

        public void OnPointerExit(IInteraction interaction)
        {
            if (pointerOverObj == interaction.GetGameObject())
            {
                EnumEventSystem.Global.Send(TriggerEnum.PointerExit, interaction);
                pointerOverObj = null;
            }
        }

        public void OnPointerDown(IInteraction interaction)
        {
            EnumEventSystem.Global.Send(TriggerEnum.PointerDown, interaction);
            holdingObj = interaction.GetGameObject();
        }

        public void OnPointerUp(IInteraction interaction)
        {
            if (holdingObj == interaction.GetGameObject())
            {
                EnumEventSystem.Global.Send(TriggerEnum.PointerUp, interaction);
                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
    }
}