#define _DEBUG_

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;

using UnityEngine;

namespace XericLibrary.Runtime.MacroLibrary
{
	/// <summary>
	/// 加载宏
	/// </summary>
	public static class MacroResources
	{
		#region 字段属性

		public static readonly Dictionary<string, string> FilePathName = new ()
		{
		// 图片
		{ "Sprite","Sprite" },
		{ "Texture2D","Sprite" },
		// 声音
		{ "Audio","Audio"},
		// 字体
		{ "Font","Font"},
		// 脚本
		{ "MonoBehaviour","Script"},
		// 脚本
		{ "RuntimeAnimatorController","Animation"},
		// 材质
		{ "PhysicMaterial","Material"},
		{ "Material","Material"},
		{ "Shader","Material"},
		// 模型
		{ "Mesh","Mesh"},
		// 预制体
		{ "GameObject","Prefab"},
		// 场景
		{ "Scene","Scene"},
		};

		private static System.Type CacheType;

		private static UnityEngine.Object[] ResourceCache;

		#endregion

		#region 加载方法

		/// <summary>
		/// 获取一个类型应该存在的根路径
		/// </summary>
		/// <param name="type"></param>
		/// <param name="path"></param>
		/// <returns></returns>
		public static bool GetFileRootPath(System.Type type, out string path)
		{
			var name = type.Name;

			if(FilePathName.TryGetValue(name, out path))
				return true;
#if _DEBUG_
			Debug.LogError($"在Resources中加载{name}时并未找到一个有效的根路径");
#endif
			return false;
		}

		/// <summary>
		/// 获取一个类型应该存在的根路径
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="path"></param>
		/// <returns></returns>
		public static bool GetFileRootPath<T>(out string path)
		{
			return GetFileRootPath(typeof(T), out path);
		}

		/// <summary>
		/// 加载一个给定名称的特定文件类型的文件
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="fileName"></param>
		/// <returns></returns>
		public static bool LoadFile<T>(this string fileName, out T result)
		where T : UnityEngine.Object
		{
			var type = typeof(T);
			if(!GetFileRootPath(type, out var path))
			{
				result = null;
				return false;
			}
			if(CacheType != type)
			{
				CacheType = type;
				ResourceCache = Resources.LoadAll<T>(path);
			}
			result = ResourceCache.FirstOrDefault(a => a.name == fileName) as T;
			return result != null;
		}

		#endregion

	}
}