using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;
public class Loader : MonoBehaviour
{
	//How much of the loading animation is dedicated to the async level loading, the rest is for the loading of asset bundles
	const float LEVEL_LOADING_PERCENTAGE = 0.5f;

	void Start()
	{
		Application.backgroundLoadingPriority = ThreadPriority.Low;
		NotificationCenter.AddListener(OnStartFadeOut, NotificationType.LoadingStartFadeOut);
		NotificationCenter.AddListener(OnApplyingSkinProgress, NotificationType.ApplyingSkinProgress);
		NotificationCenter.AddListener(OnSkinApplied, NotificationType.SkinApplied);
		StartCoroutine(LoadLevel());
	}

	void OnDestroy()
	{
		NotificationCenter.RemoveListener(OnStartFadeOut, NotificationType.LoadingStartFadeOut);
	}

	IEnumerator LoadLevel()
	{
		
		yield return null;
#if UNITY_EDITOR
		yield return new WaitForSeconds(1);
		NotificationCenter.Post(NotificationType.LoadingProgress, 0.25f);
		yield return new WaitForSeconds(1);
		NotificationCenter.Post(NotificationType.LoadingProgress, 0.45f);
		yield return new WaitForSeconds(1);
		NotificationCenter.Post(NotificationType.LoadingProgress, 0.65f);
		yield return new WaitForSeconds(1);
		NotificationCenter.Post(NotificationType.LoadingProgress, 0.85f);
		yield return new WaitForSeconds(1);
		NotificationCenter.Post(NotificationType.LoadingProgress, 1.0f);
		yield return SceneManager.LoadSceneAsync(1);
#elif UNITY_WEBPLAYER
		while (Application.GetStreamProgressForLevel(1) != 1)
		{
			NotificationCenter.Post(NotificationType.LoadingProgress, Application.GetStreamProgressForLevel(1) * 0.4f); //40% for streaming the next level
			yield return null;
		}
		yield return StartCoroutine(PreDownloadDefaultSkin(0.4f, 0.4f)); //40% percent reserved for predownloading the default skin
		AsyncOperation asyncOp = SceneManager.LoadSceneAsync(1);
		while (!asyncOp.isDone)
		{
			NotificationCenter.Post(NotificationType.LoadingProgress, 0.4f + asyncOp.progress * 0.2f); //20% was for streaming the rest of the game
			yield return null;
		}
#else
		AsyncOperation asyncOp = SceneManager.LoadSceneAsync(1);
		while (!asyncOp.isDone)
		{
			NotificationCenter.Post(NotificationType.LoadingProgress, asyncOp.progress * LEVEL_LOADING_PERCENTAGE);
			yield return null;
		}
#endif
	}

	void OnApplyingSkinProgress(Notification note)
	{
		float skinProgress = (float)note.data;
		NotificationCenter.Post(NotificationType.LoadingProgress, LEVEL_LOADING_PERCENTAGE + skinProgress * (1 - LEVEL_LOADING_PERCENTAGE));
	}

	void OnSkinApplied(Notification note)
	{
		NotificationCenter.Post(NotificationType.LoadingStartFadeOut);
	}


	IEnumerator PreDownloadDefaultSkin(float percentAlreadyDownloaded, float percentAllocatedForPreDownloading)
	{
		AVDebug.Log("Predownloading default backgrounds");
		//backgrounds
		string url = SkinDownloadManager.GetSubPartURL("default", "Backgrounds");
#if UNITY_EDITOR
		using (WWW www = new WWW(url)) //don't use caching in editor
#else
		using (WWW www = WWW.LoadFromCacheOrDownload(url, SkinDownloadManager.BUNDLES_VERSION))
#endif
		{
			while (!www.isDone)
			{
				NotificationCenter.Post(NotificationType.LoadingProgress, percentAlreadyDownloaded + www.progress * percentAllocatedForPreDownloading/2);
				yield return null;
			}
			www.Dispose();
		}

		AVDebug.Log("Predownloading default atlas");
		//atlas
		url = SkinDownloadManager.GetSubPartURL("default", SkinDownloadManager.GetAtlasNameAccordingToResolution());
#if UNITY_EDITOR
		using (WWW www = new WWW(url)) //don't use caching in editor
#else
		using (WWW www = WWW.LoadFromCacheOrDownload(url, SkinDownloadManager.BUNDLES_VERSION))
#endif
		{
			while (!www.isDone)
			{
				NotificationCenter.Post(NotificationType.LoadingProgress, percentAlreadyDownloaded + www.progress * percentAllocatedForPreDownloading/2);
				yield return null;
			}
			www.Dispose();
		}
	}

	void OnStartFadeOut(Notification note)
	{
		iTween.ValueTo(gameObject, iTween.Hash(
			"from", 1,
			"to", 0,
			"time", 1,
			"onupdate", "OniTweenFadeOutUpdate",
			"onupdatetarget", gameObject,
			"oncomplete", "OniTweenFadeOutComplete",
			"oncompletetarget", gameObject));
	}

	void OniTweenFadeOutUpdate(float newValue)
	{
		NotificationCenter.Post(NotificationType.LoadingFadeOutUpdate, newValue);
	}

	void OniTweenFadeOutComplete()
	{
		Destroy(GameObject.Find("LoadingBackgroundSpermPool"));
		Destroy(gameObject);
		NotificationCenter.Post(NotificationType.LoadingFadeOutComplete);
	}

}