// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 2019-05-20
// Description      :
// Last Modified By : 
// Last Modified On : 
// ***********************************************************************
// <copyright file= "ItemGroupHelper" company="Kunpo"></copyright>
// <summary></summary>
// ***********************************************************************
namespace G
{
	using System;
	using System.Collections.Generic;
	using System.Threading.Tasks;
	using F;
	using F.Item;
	using UnityEngine;

	public class ItemGroupHelper : IItemGroupHelper
	{
		private readonly Dictionary<Type, string> _itemClasses = new Dictionary<Type, string>();
		private Dictionary<string, byte[]> _itemAssets;

		public void AddClass<T>(string className)
		{
			var t = typeof(T);
			string assetName = (string)t.GetField("ASSET_NAME").GetValue(null);
			_itemClasses.Add(t, assetName);
		}

		public void Begin()
		{
			_itemAssets = new Dictionary<string, byte[]>();
		}

		/// <summary>
		///ItemProxy代理类所有注册类型的配置数据
		/// </summary>
		/// <param name="group"></param>
		///// <param name="result"></param>
		/// <returns></returns>
		public bool Load<T>(List<T> result) where T : IItem
		{
			var groupType = typeof(T);
			if (_itemClasses.TryGetValue(groupType, out string assetName))
				if (_itemAssets.TryGetValue(assetName, out byte[] jsonBytes))
				{
					var assetDict = jsonBytes.ToJsonTable();
					groupType.GetMethod("LoadAll").Invoke(null, new object[] { assetDict, result });
					return true;
				}
			return false;
		}

		public void End()
		{
			_itemAssets = null;
			Resources.UnloadUnusedAssets();
		}

		System.Diagnostics.Stopwatch _loadSw;
		public async Task BeginAsync()
		{
			_loadSw = System.Diagnostics.Stopwatch.StartNew();

			var asyncOp = AssetProxy.Instance.GetAssetsAsync<TextAsset>("config");
			var textList = await asyncOp.Task;

			_itemAssets = new Dictionary<string, byte[]>(textList.Count);
			foreach (var text in textList)
			{
				_itemAssets[text.name] = text.bytes;
			}
			AssetProxy.Instance.Release(asyncOp);

			LanguageProxy.Instance.LoadBytes(_itemAssets["language"]);
		}

		public async Task<bool> LoadAsync<T>(List<T> result) where T : IItem
		{
			var groupType = typeof(T);
			if (_itemClasses.TryGetValue(groupType, out string assetName))
				if (_itemAssets.TryGetValue(assetName, out byte[] jsonBytes))
				{
					var assetDict = jsonBytes.ToJsonTable();
					groupType.GetMethod("LoadAll").Invoke(null, new object[] { assetDict, result });
					return true;
				}
			//await Task.Yield();
			return false;
		}

		public async Task EndAsync()
		{
			_itemAssets = null;
			_loadSw.Stop();
			//#if UNITY_EDITOR
			Debug.Log("gsw " + _loadSw.ElapsedMilliseconds);
			//#endif
			await Task.Yield();
		}

		/// <summary>
		/// 
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="result"></param>
		public void LoadCompleted<T>(List<T> result) where T : IItem
		{
			foreach (var item in result)
			{
				(item as Item).Init();
			}
		}
	}
}