using System;
using Foundation;
using Soft.ePosPayleven;
using CoreLocation;
using System.Linq;


namespace Soft
{
	public class PaylevenManeger : PLVPaymentTaskDelegate
	{
		private PLVPayleven _payleven;
		private PLVPaymentTask _paymentTask;
		private CLLocationManager _locationManager;

		public PLVDevice[] DeviceList { get; set; }
		public PLVDevice Device { get; set; }
		public NSString Currency { get; set; }

		public PaylevenManeger()
		{
			Currency = new NSString("EUR");
			_payleven = new PLVPayleven();
			_locationManager = new CLLocationManager();
			_locationManager.Delegate = new CLLocationManagerDelegate();

			CLAuthorizationStatus code = CLLocationManager.Status;

			_locationManager.RequestAlwaysAuthorization();
			_locationManager.StartUpdatingLocation();
		}

		public void Cancel()
		{
			_paymentTask.Cancel();
		}

		public NSString GenerateRandomString()
		{
			string alphabet = "abcdefghijklmnopqrstuvwxyz1234567890";
			int alphabetLength = alphabet.Length;
			int stringLength = 20;
			NSMutableString mstring = new NSMutableString(stringLength);
			for (nint i = 0; i < stringLength; i++)
			{
				int randomIndex = new Random().Next(1,alphabetLength);
				mstring.Append(new NSString(""+alphabet[randomIndex]));
			}

			return mstring;
		}

		public string Pay(string amount)
		{
			NSLocale locale = NSLocale.CurrentLocale;
			string message;

			CLLocationCoordinate2D coordinate = _locationManager.Location.Coordinate;
			NSDecimalNumber amountDecNum = new NSDecimalNumber(amount,locale);


			if (!coordinate.IsValid())
			{
				System.Diagnostics.Debug.WriteLine("Coordinate is not valid");
			}

			PLVPaymentRequest request = new PLVPaymentRequest(GenerateRandomString(), amountDecNum, Currency, coordinate);
			_paymentTask = _payleven.PaymentTaskWithRequest(request, Device, this);

			if (_paymentTask == null)
			{
				message = "Could Not Create Payment, Error creating payment task. Make sure you’re logged in and the payment device is ready.";
			}
			else
			{
				_paymentTask.Start();
				message ="OK";
			}
			return message;
		}

		public bool PrepareDevice()
		{
			DeviceList = (PLVDevice[]) _payleven.Devices;
			if(DeviceList == null)
			{
				return false;
			}
			Device = DeviceList.First();

			bool isReady = false;
			Device.PrepareWithCompletionHandler((NSError) =>
			{
				if(Device.Ready)
				{
					isReady = true;
				}
				else
				{
					isReady = false;
				}
			});

			return isReady;
		}

		public bool LogIn(string userName, string password, string apiKey)
		{
			bool login = true;
			_payleven.LoginWithUsername(new NSString(userName), new NSString(password), new NSString(apiKey), (error) => {
				if(error != null) {
					login = false;
				}
			});

			System.Diagnostics.Debug.WriteLine("Login State: " + _payleven.LoginState);
			if(_payleven.LoginState == PLVPaylevenLoginState.ingIn)
			{
				PrepareDevice();
			}
			return login;
		}

		public bool logOut()
		{
			bool logout = true;
			_payleven.LogoutWithCompletionHandler((error) => {
				if (error != null) {
					logout = false;
				}
			});
			System.Diagnostics.Debug.WriteLine("Login State: " + _payleven.LoginState);
			return logout;
		}


		public override void PaymentTask (PLVPaymentTask paymentTask, Action<bool, CoreGraphics.CGImage> completionHandler)
		{
		}

		public override void PaymentTaskDidFinish (PLVPaymentTask paymentTask)
		{
			System.Diagnostics.Debug.WriteLine("Payment complete");
		}

		public override void PaymentTask (PLVPaymentTask paymentTask, NSError error)
		{
			System.Diagnostics.Debug.WriteLine("Payment Error, code: " + error.Code);
		}
	}
}