using UnityEngine;

using System.Collections;

public class ResourceMgr : MonoBehaviour

{

	#region 初始化

	private static ResourceMgr mInstance;

	/// <summary>

	/// 获取资源加载实例

	/// </summary>

	/// <returns></returns>

	public static ResourceMgr GetInstance()

	{

			if(mInstance == null)

			{

					mInstance = new GameObject("_ResourceMgr").AddComponent<ResourceMgr>();

			}

			return mInstance;

	}

	private ResourceMgr()

	{

			Debug.LogError ("---------------");

			hashtable = new Hashtable();

	}

	#endregion

	/// <summary> 资源缓存容器 </summary>

	private Hashtable hashtable;

	/// <summary>

	/// Load 资源

	/// </summary>

	/// <typeparam name="T">资源类型</typeparam>

	/// <param name="path">资源路径</param>

	/// <param name="cacheAsset">是否要缓存资源</param>

	/// <returns></returns>

	public T Load<T>(string path, bool cache) where T : Object

	{

		if (hashtable.Contains(path))

		{

			return hashtable[path] as T;

		}

		Debug.Log(string.Format("Load assset frome resource folder,path:{0},cache:{1}", path, cache));

		T assetObj = Resources.Load<T>(path);

		if (assetObj == null)

		{

			Debug.LogWarning("Resources中找不到资源：" + path);

		}

		if (cache)

		{

			hashtable.Add(path, assetObj);

			Debug.Log("Asset对象被缓存,Resource'path=" + path);

		}

		return assetObj;

	}

	/// <summary>

	/// 创建Resource中GameObject对象

	/// </summary>

	/// <param name="path"资源路径</param>

	/// <param name="cacheAsset">是否要缓存Asset对象</param>

	/// <returns></returns>

	public GameObject CreateGameObject(string path,GameObject parent, bool cache)

	{

		GameObject assetObj = Load<GameObject>(path, cache);

		GameObject go = Instantiate(assetObj) as GameObject;

		if (go != null && parent != null)

		{

			Transform t = go.transform;

			t.parent = parent.transform;

			t.localPosition = Vector3.zero;

			t.localRotation = Quaternion.identity;

			t.localScale = Vector3.one;

			go.layer = parent.layer;

		}

		if (go == null)

		{

			Debug.LogWarning("从Resource创建对象失败：" + path);

		}

		return go;

	}

	// Use this for initialization

	void Start () {

	}

	// Update is called once per frame

	void Update () {

	}

}