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

/// <summary>
/// 缓存池
/// </summary>
public class CachePoolManager:MBSingletonManager<CachePoolManager>
{
    /// <summary>
    /// 对象字典
    /// </summary>
    public Dictionary<string, List<GameObject>> objDic = new Dictionary<string, List<GameObject>>();

    /// <summary>
    /// 对象节点
    /// </summary>
    public Dictionary<string, Transform> nodes = new Dictionary<string, Transform>();

    /// <summary>
    /// 取对象
    /// </summary>
    /// <param name="obj">对象</param>
    /// <returns></returns>
    public GameObject Take(GameObject obj)
    {
        GameObject recordingObj = null;
   
        if (objDic.ContainsKey(obj.name) && objDic[obj.name].Count > 0)
        {
            recordingObj = objDic[obj.name][0];
            objDic[obj.name].RemoveAt(0);
        }
        else
        {
            recordingObj = GameObject.Instantiate(obj);
        }
        recordingObj.transform.SetParent(null);
        recordingObj.name = obj.name;
        recordingObj.gameObject.SetActive(true);

        return recordingObj;
    }

    /// <summary>
    /// 预加载
    /// </summary>
    public void Prestrain(GameObject obj,int number)
    {
        for (int i = 0; i < number; i++)
        {
            GameObject recordingObj = GameObject.Instantiate(obj);
            Put(recordingObj);
        }
    }

    /// <summary>
    /// 存放
    /// </summary>
    /// <param name="obj">对象</param>
    public void Put(GameObject obj)
    {
        string name = obj.name;
        obj.gameObject.SetActive(false);
        if (objDic.ContainsKey(name))
        {
            objDic[name].Add(obj);
        }
        else
        {
            objDic.Add(name, new List<GameObject>() { obj });
        }

        if (nodes.ContainsKey(obj.name))
        {
            obj.transform.SetParent(nodes[obj.name]);
        }
        else
        {
            GameObject node = new GameObject(obj.name);
            node.transform.SetParent(this.transform);
            obj.transform.SetParent(node.transform);
            node.transform.localPosition = Vector3.zero;
            node.transform.localScale = Vector3.one;
            nodes.Add(obj.name, node.transform);
        }
    }

    /// <summary>
    /// 清空
    /// </summary>
    public void Clear()
    {
        StartCoroutine(IE_Destroy());
    }

    /// <summary>
    /// 清空的协程
    /// </summary>
    private IEnumerator IE_Destroy()
    {
        for (int i = this.transform.childCount-1; i >=0; i--)
        {
            Destroy(this.transform.GetChild(i).gameObject);
            yield return null;
        }
        objDic.Clear();
        nodes.Clear();
    }
}