using UnityEngine;
using UnityEngine.Events;
using System.Collections.Generic;


public class AnyCountDownUtility : SingletonMonobehaviour<AnyCountDownUtility>
{
    private Stack<CDItem> m_FreeStack = new Stack<CDItem>();
    public List<CDItem> m_ActiveList = new List<CDItem>();
    public List<CDItem> m_CacheRemoveList = new List<CDItem>();

    public void Create(float cd, GActor target, UnityAction callback)
    {
        CDItem _item = null;

        if (m_FreeStack.Count > 0)
        {
            _item = m_FreeStack.Pop();
        }
        else
        {
            _item = new CDItem();
        }

        _item.Reset(cd, target, callback);
        _item.Start();
        m_ActiveList.Add(_item);
    }

    void Update()
    {
        m_CacheRemoveList.Clear();

        for (int i = 0; i < m_ActiveList.Count; ++i)
        {
            m_ActiveList[i].Update();

            if (m_ActiveList[i].IsFinished())
            {
                m_CacheRemoveList.Add(m_ActiveList[i]);
            }
        }

        for (int i = 0; i < m_CacheRemoveList.Count; ++i)
        {
            m_CacheRemoveList[i].Reset(0, null, null);
            m_ActiveList.Remove(m_CacheRemoveList[i]);
            m_FreeStack.Push(m_CacheRemoveList[i]);
        }

        m_CacheRemoveList.Clear();
    }

    public class CDItem
    {
        private float m_Cd;
        private UnityAction m_Callback;
        private float m_StartTime;
        private GActor m_Target;

        public void Start()
        {
            m_StartTime = Time.realtimeSinceStartup;
        }

        public void Update()
        {
            if (Time.realtimeSinceStartup - m_StartTime > m_Cd)
            {
                if (m_Callback != null)
                {
                    m_Callback();
                }
            }
        }

        public bool IsFinished()
        {
            return Time.realtimeSinceStartup - m_StartTime > m_Cd
                || m_Target == null
                || m_Target.ActorInfo == null
                || m_Target.ActorInfo.serverDie;
        }

        public void Reset(float cd, GActor target, UnityAction callback)
        {
            m_Cd = cd;
            m_Target = target;
            m_Callback = callback;
        }
    }
}