using System;
using System.Threading.Tasks;
using Newtonsoft.Json;
using NSubstitute;
using NUnit.Framework;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Connector;
using TINK.Model.Device;
using TINK.Model.State;
using TINK.Model.User;
using TINK.Repository.Exception;
using TINK.Repository.Request;
using TINK.Repository.Response;
using TINK.Services.BluetoothLock;
using TINK.Services.BluetoothLock.Exception;
using TINK.Services.BluetoothLock.Tdo;
using TINK.Services.Geolocation;
using TINK.View;
using TINK.ViewModel;
using TINK.ViewModel.Bikes;
using TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler;

namespace TestShareeLib.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	[TestFixture]
	public class TestBookedUnknown
	{

		/// <summary>
		/// Test construction of object.
		/// </summary>
		[Test]
		public void Testctor()
		{
			var handler = new BookedUnknown(
				Substitute.For<IBikeInfoMutable>(),
				() => true, // isConnectedDelegate
				(isConnexted) => Substitute.For<IConnector>(),
				Substitute.For<IGeolocation>(),
				Substitute.For<ILocksService>(),
				() => Substitute.For<IPollingUpdateTaskManager>(),
				Substitute.For<ISmartDevice>(),
				Substitute.For<IViewService>(),
				Substitute.For<IBikesViewModel>(),
				Substitute.For<IUser>());

			// Verify prerequisites.
			Assert.AreEqual("Open lock", handler.ButtonText);
			Assert.IsTrue(handler.IsButtonVisible);
			Assert.AreEqual("Close lock", handler.LockitButtonText);
			Assert.IsTrue(handler.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Opens lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpen()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsOutOfReachException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Error while opening lock!", "Lock cannot be opened until bike is near.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual(nameof(BookedDisconnected), subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenBoldBlockedException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenBoldIsBlockedException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Error while opening lock!", "Ensure that no obstacle prevents lock from opening and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Unknown" after action
			Assert.AreEqual("Open lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenInconsistentStateExecptionClosed()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenInconsistentStateExecption(LockingState.Closed));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Error while opening lock!", "After try to open lock state closed is reported.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenInconsistentStateExecption()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenBoldStatusIsUnknownException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Lock can not be opened!", "The lock could not be opened correctly. Please try again.\r\n\r\nAttention! Your rental has already started.\r\n\r\nIf the lock still won't open, make sure the lock is closed and return the bike. Please report it to the support!", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual("Open lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Error while opening lock!", "Exception message.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual(nameof(BookedDisconnected), subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Opens lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpenGetBatteryPercentageAsyncThrowsOutOfReachException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			locks[0].GetBatteryPercentageAsync().Returns<Task<double>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Battery status can only be read when bike is nearby.";
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}


		/// <summary>
		/// Use case: Opens lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpenGetBatteryPercentageAsyncThrowsExcepton()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			locks[0].GetBatteryPercentageAsync().Returns<Task<double>>(x => throw new Exception());

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Battery status cannot be read.";
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsWebConnectFailureException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, null).Returns(x => throw new WebConnectFailureException("Context info", new System.Exception("hoppla")));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "No web error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Connection error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsResponseException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x =>
				throw new ReturnBikeException(JsonConvert.DeserializeObject<ReservationCancelReturnResponse>(@"{ ""response_text"" : ""Some invalid data received!""}"), "Outer message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is opening.<br/>Please wait until it is completely open.</b></h4>";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Status error on updating lock state.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Close lock
		/// Final state: Booked closed.
		/// </summary>
		[Test]
		public void TestClose()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Closed)); // Return lock state indicating success

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Close lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestCloseCloseFailsOutOfReachException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Lock can not be closed!", "Lock cannot be closed until bike is near.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked disconnected" after action
			Assert.AreEqual("BookedDisconnected", subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Close lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestCloseCloseFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Lock can not be closed!", "Exception message.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual("BookedDisconnected", subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Close lock
		/// Final state: Booked closed.
		/// </summary>
		[Test]
		public void TestCloseUpdateLockingStateFailsWebConnectFailureException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns(LockitLockingState.Closed); // Return lock state indicating success

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x => throw new WebConnectFailureException("Context info", new System.Exception("hoppla")));

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "No web error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: close lock
		/// Final state: Booked closed.
		/// </summary>
		[Test]
		public void TestCloseUpdateLockingStateFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns(LockitLockingState.Closed); // Return lock state indicating success

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Connection error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: close lock
		/// Final state: Booked closed.
		/// </summary>
		[Test]
		public void TestCloseUpdateLockingStateFailsResponseException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedUnknown(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].CloseAsync()
				.Returns(LockitLockingState.Closed); // Return lock state indicating success

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x =>
				throw new ReturnBikeException(JsonConvert.DeserializeObject<ReservationCancelReturnResponse>(@"{ ""response_text"" : ""Some invalid data received!""}"), "Outer message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "<h4><b>Lock is closing.<br/>Please wait until it is completely closed.</b></h4>";
				locks.Received()[0].CloseAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Status error on updating lock state.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}
	}
}