//**********************************************//
//作者:#AUTHOR#
//日期:#DATE#
//简述:#DESCRIPTION#
//*********************************************//
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using Thousandto.Core.Asset;
using Thousandto.Core.Base;

namespace Thousandto.Plugins.Common
{
    /// <summary>
    /// 类ItemAndEquipAltasManager说明
    /// </summary>
    public class UIIconAltasManager
    {
        #region //常量
        private const int Segmentation = 64;
        private const string AltasName = "UINewIconAtlas";
        #endregion

        #region //私有变量
        private Dictionary<int,UIIconAltas> _altasDic; //altas 字典，key为名字后面的后缀 比如public_0 这里的0;
        #endregion   

        #region//公共接口
        //初始化
        public void Initialization()
        {
            _altasDic = new Dictionary<int , UIIconAltas>();
        }

        //反初始化
        public void UnInitialization()
        {
            var enumber = _altasDic.GetEnumerator();
            try
            {
                while ( enumber.MoveNext() )
                {
                    if ( enumber.Current.Value.Altas != null )
                    {
                        UIPoolAssetsLoader.UnloadAtlas( enumber.Current.Value.AltasName , enumber.Current.Value.Altas.transform );
                    }
                    else
                    {
                        UIPoolAssetsLoader.UnloadAtlas( enumber.Current.Value.AltasName , null );
                    }  
                }
            }
            finally
            {
                enumber.Dispose();
            }
            _altasDic.Clear();
        }

        //获取altas
        public UIIconAltas GetIconAltasWithIconId(int id, MyAction<UIAtlas> callBack)
        {
            UIIconAltas retAltas = null;
            int index = GenerateIndexWithId(id);
            _altasDic.TryGetValue(index, out retAltas);
            if (null == retAltas)
            {
                //FLogger.LogError("UnUseAltasWithIconId:New", index);
                retAltas = new UIIconAltas();
                retAltas.Index = index;
                retAltas.AltasName = UIPoolAssetsLoader.AtlasName(AltasName, index);
                Debug.Log("yy GetIconAltasWithIconId id: " + id + " atlasName: " + retAltas.AltasName);
                retAltas.RetainCount = 1;                
                retAltas.AddCallBack(callBack);
                if (!_altasDic.ContainsKey(index))
                {
                    _altasDic.Add(index, retAltas);
                }

                UIPoolAssetsLoader.LoadAtlasPrefabAsyn(AltasName, index, atlasTrans =>
                {
                    //FLogger.LogError("GetIconAltasWithIconId ", AltasName, index, ";atlasTrans=", atlasTrans);
                    if (atlasTrans != null)
                    {
                        var itemAtlas = atlasTrans.GetComponent<UIAtlas>();
                        //FLogger.LogError("GetIconAltasWithIconId ", ";itemAtlas=", atlasTrans);
                        if (null != itemAtlas)
                        {
                            //FLogger.LogError("GetIconAltasWithIconId ", ";retAltas=", retAltas);
                            Debug.Log("yy GetIconAltasWithIconId retAltas is valid");
                            retAltas.Altas = itemAtlas;
                            retAltas.DoCallBack();
                        }
                    }
                });
            }
            else
            {
                retAltas.AddCallBack(callBack);
                retAltas.RetainCount++;
            }
//            Debug.Log(string.Format("GetIconAltasWithIconId:{0}:{1}", retAltas.AltasName, retAltas.RetainCount));
            return retAltas;
        }

        //获取altas
        public UIAtlas GetAltasWithIconId(int id, MyAction<UIAtlas> callBack)
        {
            UIIconAltas retAltas = GetIconAltasWithIconId(id, callBack);
            return retAltas.Altas;
        }

        public void UnUseAltasWithIconId(int id, MyAction<UIAtlas> callBack)
        {
            //Debug.Log(string.Format("UnUseAltasWithIconId:{0}", id));
            int index = GenerateIndexWithId( id );
            UIIconAltas resAltas = null;
            _altasDic.TryGetValue( index , out resAltas );
            if ( null != resAltas )
            {
                resAltas.RemoveCallBack(callBack);
                resAltas.RetainCount--;
                //Debug.Log(string.Format("UnUseAltasWithIconId:{0}:{1}", resAltas.AltasName, resAltas.RetainCount));
            }
            
        }
        //清除空引用的atlas
        public void CleanupAltas()
        {
            List<UIIconAltas> removeList = new List<UIIconAltas>(); 
            var e = _altasDic.GetEnumerator();
            try
            {
                while (e.MoveNext())
                {
                    if (e.Current.Value.RetainCount <= 0)
                    {
                        removeList.Add(e.Current.Value);
                    }
                }
            }
            finally
            {
                e.Dispose();
            }

            for (int i = 0; i < removeList.Count; i++)
            {
                var resAltas = removeList[i];
                if (resAltas.Altas != null)
                {
                    UIPoolAssetsLoader.UnloadAtlas(resAltas.AltasName, resAltas.Altas.transform);
                }
                else
                {
                    UIPoolAssetsLoader.UnloadAtlas(resAltas.AltasName, null);
                }
                _altasDic.Remove(resAltas.Index);
            }
            removeList.Clear();
        }
        #endregion

        #region //私有函数
        /// <summary>
        /// 通过icon的索引值来计算atlas的索引
        /// icon的索引值时从1开始
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        private int GenerateIndexWithId( int id )
        {            
            int index = (id -1) / Segmentation + 1;
            return index;
        }
        #endregion

    }
}