using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

namespace WK
{

    /// <summary>
    /// 类似UnityEvent但是更轻量
    /// </summary>
    public class ScopedEvent
    {
        public delegate void EventHandler(params object[] args);

        private List<EventHandler> m_Handlers = new List<EventHandler>();

        public void AddListener(EventHandler handler)
        {
            if(handler == null)
            {
                return;
            }
            if (m_Handlers.Contains(handler))
                return;
            m_Handlers.Add(handler);
        }

        public void RemoveListener(EventHandler handler)
        {

            if (handler == null)
            {
                return;
            }
            m_Handlers.Remove(handler);
        }

        public bool HasHandler(EventHandler handler)
        {
            return m_Handlers.Contains(handler);
        }

        public void Invoke(params object[] args)
        {
            for(int i = 0; i < m_Handlers.Count; ++i)
            {
                m_Handlers[i](args);
            }
        }

    }

}