using UnityEngine;
using System.Collections;

/// <summary>
/// FSM: http://yuml.me/edit/331d4664
/// </summary>
public class Skin
{

	public enum SkinState
	{
		NULL,
		Initialising,
		AvailableForApplying,
		Applied,
		AvailableForPurchase,
		Purchasing,
		Downloading
	}

	enum SkinTransition
	{
		NULL,
		AlreadyPurchasedButNotApplied,
		AlreadyPurchasedAndApplied,
		NotPurchasedYet,
		Purchase,
		StartDownloading,
		PurchaseFailed,
		FinishedDownload,
		FailedDownload,
		Apply,
		UnApply
	}

	public IAPProduct product;

	public const string CURRENTLY_APPLIED_SKIN = "CurrentSkin";
	const string PURCHASED_KEY_PREFIX = "Purchased";
	const string NON_CONSUMABLE_PAYLOAD = "nonconsume";

	FSMSystem<SkinTransition, SkinState> _fsm;
	float _skinDownloadProgress;
	string _pendingTransaction;

	public float SkinDownloadProgress { get { return _skinDownloadProgress; } }

	public Skin(IAPProduct product)
	{
		NotificationCenter.AddListener(OnApplySkin, NotificationType.ApplySkin);
		this.product = product;
		CreateFSM();

		//check if it has been purchased, currently applied etc
		if (HasPurchasedSkin())
		{
			if (IsCurrentlyApplied())
			{
				_fsm.PerformTransition(SkinTransition.AlreadyPurchasedAndApplied);
			} else
			{
				_fsm.PerformTransition(SkinTransition.AlreadyPurchasedButNotApplied);
			}
		} else
		{
			_fsm.PerformTransition(SkinTransition.NotPurchasedYet);
		}

		//#if UNITY_IPHONE
		//{
		//    //StoreKitManager.productPurchaseAwaitingConfirmationEvent += OnProductPurchaseAwaitingConfirmationEvent;
		//}
		//#endif
	}

	bool HasPurchasedSkin()
	{
		if (product.productId == "default")
		{
			return true;
		} else
		{
			return PlayerPrefs.GetInt(PURCHASED_KEY_PREFIX+product.productId, 0) == 1;
		}
	}

	bool IsCurrentlyApplied()
	{
		return PlayerPrefs.GetString(CURRENTLY_APPLIED_SKIN, "") == product.productId;
	}

	#region FSM
	void CreateFSM()
	{
		_fsm = new FSMSystem<SkinTransition, SkinState>("Skin");
		var InitialisingState = new FSMState<SkinTransition, SkinState>(SkinState.Initialising);
		InitialisingState.AddTransition(SkinTransition.AlreadyPurchasedAndApplied, SkinState.Applied);
		InitialisingState.AddTransition(SkinTransition.AlreadyPurchasedButNotApplied, SkinState.AvailableForApplying);
		InitialisingState.AddTransition(SkinTransition.NotPurchasedYet, SkinState.AvailableForPurchase);
		_fsm.AddState(InitialisingState);

		var AvailableForApplyingState = new FSMState<SkinTransition, SkinState>(SkinState.AvailableForApplying);
		AvailableForApplyingState.AddTransition(SkinTransition.Apply, SkinState.Applied);
		_fsm.AddState(AvailableForApplyingState);

		var AppliedState = new FSMState<SkinTransition, SkinState>(SkinState.Applied);
		AppliedState.AddTransition(SkinTransition.UnApply, SkinState.AvailableForApplying);
		AppliedState.DoBeforeEntering += OnEnteringAppliedState;
		_fsm.AddState(AppliedState);

		var AvailableForPurchaseState = new FSMState<SkinTransition, SkinState>(SkinState.AvailableForPurchase);
		AvailableForPurchaseState.AddTransition(SkinTransition.Purchase, SkinState.Purchasing);
		AvailableForPurchaseState.AddTransition(SkinTransition.StartDownloading, SkinState.Downloading);
		_fsm.AddState(AvailableForPurchaseState);

		var PurchasingState = new FSMState<SkinTransition, SkinState>(SkinState.Purchasing);
		PurchasingState.AddTransition(SkinTransition.StartDownloading, SkinState.Downloading);
		PurchasingState.AddTransition(SkinTransition.PurchaseFailed, SkinState.AvailableForPurchase);
		PurchasingState.DoBeforeEntering += OnEnteringPurchasingState;
		PurchasingState.DoBeforeLeaving += OnLeavingPurchasingState;
		_fsm.AddState(PurchasingState);

		var DownloadingState = new FSMState<SkinTransition, SkinState>(SkinState.Downloading);
		DownloadingState.AddTransition(SkinTransition.FinishedDownload, SkinState.AvailableForApplying);
		DownloadingState.AddTransition(SkinTransition.FailedDownload, SkinState.AvailableForPurchase);
		DownloadingState.DoBeforeEntering += OnEnteringDownloadingState;
		DownloadingState.DoBeforeLeaving += OnLeavingDownloadingState;
		_fsm.AddState(DownloadingState);
	}

	void OnEnteringPurchasingState()
	{
		#if UNITY_EDITOR || UNITY_WEBPLAYER
		{
			_fsm.PerformTransition(SkinTransition.StartDownloading);
		}
		//Did not use IAP Combo from Prime31 as it wasn't firing properly when the purchase was cancelled.
		#elif UNITY_IPHONE
		{
			//StoreKitManager.purchaseFailedEvent += OnPurchaseFailed;
			//StoreKitManager.purchaseCancelledEvent += OnPurchaseCancelled;
			//StoreKitBinding.purchaseProduct(product.productId, 1);
		}
		#elif UNITY_ANDROID
		{
			GoogleIABManager.purchaseSucceededEvent += OnGooglePurchaseSucceeded;
			GoogleIABManager.purchaseFailedEvent += OnPurchaseFailed;
			GoogleIAB.purchaseProduct( product.productId, NON_CONSUMABLE_PAYLOAD );
		}
		#endif
	}

	void OnLeavingPurchasingState()
	{
		//#if UNITY_IPHONE
		//{
		//    StoreKitManager.purchaseFailedEvent -= OnPurchaseFailed;
		//    StoreKitManager.purchaseCancelledEvent -= OnPurchaseCancelled;
		//}
		//#elif UNITY_ANDROID
		//{
		//    GoogleIABManager.purchaseSucceededEvent -= OnGooglePurchaseSucceeded;
		//    GoogleIABManager.purchaseFailedEvent -= OnPurchaseFailed;
		//}
		//#endif
	}

	void OnEnteringDownloadingState()
	{
		NotificationCenter.AddListener(OnSkinDownloadProgress, NotificationType.SkinDownloadProgress);
		NotificationCenter.AddListener(OnSkinDownloadCompleted, NotificationType.SkinDownloadCompleted);
		NotificationCenter.AddListener(OnSkinDownloadFailed, NotificationType.SkinDownloadFailed);
		SkinDownloadManager.Instance.DownloadSkin(product.productId);
	}

	void OnLeavingDownloadingState()
	{
		NotificationCenter.RemoveListener(OnSkinDownloadProgress, NotificationType.SkinDownloadProgress);
		NotificationCenter.RemoveListener(OnSkinDownloadCompleted, NotificationType.SkinDownloadCompleted);
		NotificationCenter.RemoveListener(OnSkinDownloadFailed, NotificationType.SkinDownloadFailed);
	}

	void OnEnteringAppliedState()
	{
		if (PlayerPrefs.GetString(CURRENTLY_APPLIED_SKIN, "") == product.productId)
		{
			return;
		}
		PlayerPrefs.SetString(CURRENTLY_APPLIED_SKIN, product.productId);
		NotificationCenter.Post(NotificationType.ApplySkin, product.productId);
		SkinDownloadManager.Instance.ApplyCachedSkin(product.productId);
	}
	#endregion

	#region Download notifications
	void OnSkinDownloadProgress(Notification note)
	{
		object[] parameters = (object[])note.data;
		string skinId = (string)parameters[0];

		if (skinId == product.productId)
		{
			_skinDownloadProgress = (float)parameters[1];
		}
	}

	void OnSkinDownloadCompleted(Notification note)
	{
		string skinId = (string)note.data;
		if (skinId == product.productId)
		{
			AVDebug.Log("Download Complete "+product.productId);
			PlayerPrefs.SetInt(PURCHASED_KEY_PREFIX+product.productId, 1);
			//#if UNITY_IPHONE
			//    StoreKitBinding.finishPendingTransaction(_pendingTransaction);
			//#endif
			_fsm.PerformTransition(SkinTransition.FinishedDownload);
		}
	}

	void OnSkinDownloadFailed(Notification note)
	{
		string skinId = (string)note.data;
		if (skinId == product.productId)
		{
			AVDebug.Log("Download Failed "+product.productId);
			_fsm.PerformTransition(SkinTransition.FailedDownload);
		}
	}
	#endregion

	#region Public methods
	public SkinState State { get { return _fsm.CurrentStateID; } }

	public void Buy()
	{
		_fsm.PerformTransition(SkinTransition.Purchase);
	}

	public void Apply()
	{
		_fsm.PerformTransition(SkinTransition.Apply);
	}

	public void UnApply()
	{
		_fsm.PerformTransition(SkinTransition.UnApply);
	}

#if UNITY_ANDROID
	public void GoogleSaidItsAlreadyPurchased()
	{
		if (!HasPurchasedSkin())
		{
			_fsm.PerformTransition(SkinTransition.StartDownloading);
		}
	}

	void OnGooglePurchaseSucceeded(GooglePurchase purchase)
	{
		if (purchase.productId == product.productId)
		{
			AVDebug.Log("Google purchase successful "+product.productId);
			_fsm.PerformTransition(SkinTransition.StartDownloading);
		}
	}
#endif
	#endregion

   #region Store Kit Callbacks
//#if UNITY_IPHONE
//    public void OnProductPurchaseAwaitingConfirmationEvent(StoreKitTransaction transaction)
//    {
//        if (transaction.productIdentifier == product.productId)
//        {
//            AVDebug.Log("ProductPurchaseAwaitingConfirmationEvent "+transaction.productIdentifier);
//            _pendingTransaction = transaction.transactionIdentifier;
//            _fsm.PerformTransition(SkinTransition.StartDownloading);
//        }
//    }
//#endif

	void OnPurchaseFailed(string reason)
	{
		AVDebug.Log("Purchase Failed. Reason: "+reason);
		_fsm.PerformTransition(SkinTransition.PurchaseFailed);
	}

	void OnPurchaseCancelled(string reason)
	{
		AVDebug.Log("Purchase Cancelled. Reason "+reason);

		_fsm.PerformTransition(SkinTransition.PurchaseFailed);
	}
	#endregion

	void OnApplySkin(Notification note)
	{
		if (State == SkinState.Applied)
		{
			string skinId = (string)note.data;
			if (skinId != product.productId)
			{
				UnApply();
			}
		}
	}

}