using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using UnityEngine;

namespace Model
{
	public static class BundleHelper
	{
		public static async Task DownloadBundle()
		{
			Game.Scene.GetComponent<EventComponent>().Run(EventIdType.LoadingBegin);
			await StartDownLoadResources();
			Game.Scene.GetComponent<EventComponent>().Run(EventIdType.LoadingFinish);
		}
		
		public static async Task StartDownLoadResources()
		{
			if (Define.IsAsync)
			{
				string url = GlobalConfigComponent.Instance.GlobalProto.GetUrl() + "StreamingAssets/StreamingAssets";
				try
				{
					using (WWWAsync wwwAsync = EntityFactory.Create<WWWAsync>())
					{
						await wwwAsync.DownloadAsync(url);
						ResourcesComponent.AssetBundleManifestObject = wwwAsync.www.assetBundle.LoadAsset<AssetBundleManifest>("AssetBundleManifest");
						wwwAsync.www.assetBundle.Unload(false);
					}
				}
				catch (Exception e)
				{
					Log.Error($"下载错误: {url} {e}");
					return;
				}
				
				using (BundleDownloaderComponent bundleDownloaderComponent = Game.Scene.AddComponent<BundleDownloaderComponent>())
				{
					await bundleDownloaderComponent.StartAsync();
				}
			}
		}
	}
}