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

namespace Engine.CLoader
{
    /// <summary>内存中的资源对象</summary>
    internal class CAssetsInfo
    {
        /// <summary>资源的AssetBundle 对象</summary>
        public AssetBundle assetsBundle;
        /// <summary>资源包名称</summary>
        public string assetsName;
        /// <summary>资源依赖的资源包</summary>
        public List<CAssetsInfo> depAssetsList = new List<CAssetsInfo>();
        /// <summary>是否为空资源</summary>
        public bool isEmpty = true;

        /// <summary>资源使用计算</summary>
        private int useCount = 0;

        /// <summary>减少使用计数</summary>
        public void DelUseCount()
        {
            useCount--;
            //特出处理
            useCount = (useCount < 0) ? 0 : useCount;

            if(useCount==0)
            {
                this.Dispose();
            }
        }

        /// <summary>增加使用基数</summary>
        public void AddUseCount()
        {
            useCount++;
        }

        /// <summary>释放函数</summary>
        public void Dispose()
        {
            if (assetsBundle!=null)
            {
                assetsBundle.Unload(false);
                assetsBundle = null;
            }

            assetsName = string.Empty;

            for (int i = 0; i < depAssetsList.Count; i++)
            {
                depAssetsList[i].DelUseCount();
            }
            depAssetsList.Clear();

            isEmpty = true;
        }
    }
}