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


public class GameObjectPool
{

    private List<GameObject> m_FreeList;
    private List<GameObject> m_ActiveList;
    private GameObject m_Prefab;

    public int nameHashCode;
    public string name;

    public GameObjectPool(GameObject prefab)
    {
        name = prefab.name;
        nameHashCode = name.GetHashCode();

        m_Prefab = prefab;
        m_FreeList = new List<GameObject>();
        m_ActiveList = new List<GameObject>();
    }

    public GameObject Request()
    {
        GameObject _gameObject = null;
        if (m_FreeList.Count == 0)
        {
            _gameObject = Object.Instantiate(m_Prefab);
            _gameObject.name = name;
        }
        else
        {
            _gameObject = m_FreeList[0];
            m_FreeList.RemoveAt(0);
        }
        m_ActiveList.Add(_gameObject);
        return _gameObject;
    }

    public void Release(GameObject gameObject)
    {
        if (m_ActiveList.Contains(gameObject))
        {
            m_ActiveList.Remove(gameObject);
        }
        else
        {
            DebugEx.LogWarningFormat("所回收的go对象 {0} 并不是从池里取得的...", gameObject.name);
        }
        m_FreeList.Add(gameObject);
       
    }

    public void Clear()
    {
        foreach (var _item in m_FreeList)
        {
            Object.Destroy(_item);
        }
        foreach (var _item in m_ActiveList)
        {
            Object.Destroy(_item);
        }
        m_FreeList.Clear();
        m_ActiveList.Clear();
    }

    public void Destroy()
    {

        Clear();

        m_Prefab = null;

        m_FreeList = null;
        m_ActiveList = null;
    }

#if UNITY_EDITOR
    public void ForeachActive(System.Action<GameObject> method)
    {
        for (int i = m_ActiveList.Count - 1; i >= 0; --i)
        {
            method(m_ActiveList[i]);
        }
    }

    public void ForeachFree(System.Action<GameObject> method)
    {
        for (int i = m_FreeList.Count - 1; i >= 0; --i)
        {
            method(m_FreeList[i]);
        }
    }
#endif
}