using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.IO;

public class AssetBundleLoaderTest : MonoBehaviour
{
	
	public GameObject cube;
	const int version = 2;
	List<Object> loadedObjects = new List<Object>();

	IEnumerator DownloadAndCache(int level)
	{
		string url = AssetBundleUtils.GetAssetBundlesURL() + "/Level" + level + "_Backgrounds.unity3d";
		AVDebug.Log("Loading asset bundle  from " + url);

		// Wait for the Caching system to be ready
		while (!Caching.ready)
		{
			yield return null;
		}

		// Load the AssetBundle file from Cache if it exists with the same version or download and store it in the cache
		using (WWW www = WWW.LoadFromCacheOrDownload (url, version))
		{
			while (!www.isDone)
			{
				//AVDebug.Log (www.progress);
				yield return null;
			}
			if (www.error != null)
			{
				throw new System.Exception("WWW download had an error:" + www.error);
			}

			//Clear anything from the previous loaded asset bundle
			foreach (Object loadedObj in loadedObjects)
			{
				AVDebug.Log("Destroying " + loadedObj);
				DestroyImmediate(loadedObj, true);
			}
			loadedObjects.Clear();

			AssetBundle bundle = www.assetBundle;
			
			// Load the object asynchronously
			AssetBundleRequest request = bundle.LoadAssetAsync("texture", typeof(Texture2D));
	
			// Wait for completion
			yield return request;
			
			// Get the reference to the loaded object
			Texture2D obj = request.asset as Texture2D;
			loadedObjects.Add(obj);
			cube.GetComponent<Renderer>().material.mainTexture = obj;

			// Unload the AssetBundles compressed contents to conserve memory
			bundle.Unload(false);

			// Frees the memory from the web stream
			www.Dispose();
		}
	}


	void OnGUI()
	{
		if (GUILayout.Button("Bundle 1"))
		{
			StartCoroutine(DownloadAndCache(1));
		}
		
		if (GUILayout.Button ("Bundle 2"))
		{
			StartCoroutine(DownloadAndCache(2));
		}

		// enforce the fact that we can't purchase products until we retrieve the product data
		//#if UNITY_IPHONE
		//    if (_products != null && _products.Count > 0)
		//    {
		//        if (GUILayout.Button("Purchase Skin 1"))
		//        {
		//            StoreKitBinding.purchaseProduct("Skin001", 1);
		//        }
		//        if (GUILayout.Button("Purchase Skin 2"))
		//        {
		//            StoreKitBinding.purchaseProduct("Skin002", 1);
		//        }
		//    }
		//#endif
	}
	

#if UNITY_IPHONE
	#region TESTING FOR HOSTED CONTENT WITH APPLE
	//private List<StoreKitProduct> _products;
	
	void Start()
	{

		//var productIdentifiers = new string[] { "Skin001", "Skin002"};
		//StoreKitBinding.requestProductData(productIdentifiers);
		
		// this is used when you want to validate receipts on your own server or when dealing with iTunes hosted content
		// you must manually call StoreKitBinding.finishPendingTransactions when the download/validation is complete
		//StoreKitManager.autoConfirmTransactions = false;
		
		//StoreKitManager.paymentQueueUpdatedDownloadsEvent += DownloadUpdates;
		
		
		// you cannot make any purchases until you have retrieved the products from the server with the requestProductData method
		// we will store the products locally so that we will know what is purchaseable and when we can purchase the products
		//StoreKitManager.productListReceivedEvent += allProducts =>
		//{
		//    AVDebug.Log("received total products: " + allProducts.Count);
		//    _products = allProducts;
		//};
	}

	//void DownloadUpdates(List<StoreKitDownload> updates)
	//{
	//    foreach (var d in updates)
	//    {
	//        if (d.downloadState == StoreKitDownloadState.Finished)
	//        {
	//            AVDebug.Log(d.contentURL + " %" + d.progress);
	//            if (!string.IsNullOrEmpty(d.contentURL))
	//            {
	//                StartCoroutine(LoadFromHostedContent(d.contentURL));
	//            }
	//            StoreKitBinding.finishPendingTransactions();
	//        }
	//    }
	//}

	IEnumerator LoadFromHostedContent(string url)
	{
		url += "Contents/Level1_Backgrounds.unity3d";

		// Load the AssetBundle file from Cache if it exists with the same version or download and store it in the cache
		using (WWW www = WWW.LoadFromCacheOrDownload (url, version))
		{
			while (!www.isDone)
			{
				//AVDebug.Log (www.progress);
				yield return null;
			}
			if (www.error != null)
			{
				AVDebug.LogError("WWW download had an error:" + www.error);
				yield break;
			}

			AVDebug.Log("Done!!!!");

			AssetBundle bundle = www.assetBundle;

			// Load the object asynchronously
			AssetBundleRequest request = bundle.LoadAssetAsync("texture0", typeof(Texture2D));

			// Wait for completion
			yield return request;

			// Get the reference to the loaded object
			Texture2D obj = request.asset as Texture2D;
			loadedObjects.Add(obj);
			cube.GetComponent<Renderer>().material.mainTexture = obj;

			// Unload the AssetBundles compressed contents to conserve memory
			bundle.Unload(false);

			// Frees the memory from the web stream
			www.Dispose();


		}


	}
	#endregion
#endif

}