using System;
using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

namespace TriLib
{
	public class AssetDownloader : MonoBehaviour
	{
		public bool HasStarted
		{
			get
			{
				return this._unityWebRequest != null;
			}
		}

		public bool IsDone
		{
			get
			{
				return this._unityWebRequest != null && this._unityWebRequest.isDone;
			}
		}

		public string Error
		{
			get
			{
				if (this.HasStarted)
				{
					return this._unityWebRequest.error ?? this._error;
				}
				return this._error;
			}
		}

		public float Progress
		{
			get
			{
				if (!this.HasStarted)
				{
					return 0f;
				}
				return this._unityWebRequest.downloadProgress;
			}
		}

		protected void Start()
		{
			if (!string.IsNullOrEmpty(this.AssetURI) && !string.IsNullOrEmpty(this.AssetExtension))
			{
				this.DownloadAsset(this.AssetURI, this.AssetExtension, null, null, null, this.WrapperGameObject);
			}
		}

		protected void OnGUI()
		{
			if (!this.ShowProgress || !this.HasStarted || this.IsDone)
			{
				return;
			}
			if (this._centeredStyle == null)
			{
				this._centeredStyle = GUI.skin.GetStyle("Label");
				this._centeredStyle.alignment = TextAnchor.UpperCenter;
			}
			Rect position = new Rect((float)Screen.width / 2f - 100f, (float)Screen.height / 2f - 25f, 200f, 50f);
			GUI.Label(position, string.Format("Downloaded {0:P2}", this.Progress), this._centeredStyle);
		}

		public bool DownloadAsset(string assetURI, string assetExtension, ObjectLoadedHandle onAssetLoaded = null, TexturePreLoadHandle onTexturePreLoad = null, AssetLoaderOptions options = null, GameObject wrapperGameObject = null)
		{
			if (this.HasStarted && !this.IsDone)
			{
				return false;
			}
			this.AssetURI = assetURI;
			this.AssetExtension = assetExtension;
			this.WrapperGameObject = wrapperGameObject;
			base.StartCoroutine(this.DoDownloadAsset(assetURI, assetExtension, onAssetLoaded, onTexturePreLoad, options, wrapperGameObject));
			return true;
		}

		private IEnumerator DoDownloadAsset(string assetURI, string assetExtension, ObjectLoadedHandle onAssetLoaded, TexturePreLoadHandle onTexturePreLoad = null, AssetLoaderOptions options = null, GameObject wrapperGameObject = null)
		{
			this._unityWebRequest = UnityWebRequest.Get(assetURI);
			yield return this._unityWebRequest.Send();
			if (string.IsNullOrEmpty(this._unityWebRequest.error))
			{
				byte[] data = this._unityWebRequest.downloadHandler.data;
				using (AssetLoader assetLoader = new AssetLoader())
				{
					assetLoader.LoadFromMemoryWithTextures(data, assetExtension, onAssetLoaded, out this._error, onTexturePreLoad, options, wrapperGameObject);
				}
			}
			this._unityWebRequest.Dispose();
			this._unityWebRequest = null;
			yield break;
		}

		public string AssetURI;

		public string AssetExtension;

		public GameObject WrapperGameObject;

		public bool ShowProgress;

		private UnityWebRequest _unityWebRequest;

		private GUIStyle _centeredStyle;

		private string _error;
	}
}