using System;
using System.Threading.Tasks;
using Newtonsoft.Json;
using NSubstitute;
using NUnit.Framework;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock.Command;
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;
using static TINK.Model.Bikes.BikeInfoNS.BluetoothLock.Command.CloseCommand;

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<IGeolocationService>(),
				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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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("Lock could not be opened!", "Make sure you have granted Bluetooth permission to the app. Step as close as possible to the bike lock and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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 TestOpenOpenFailsCouldntOpenBoltBlockedException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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("Lock could not be opened!", "Lock bolt is blocked. Make sure that no spoke presses against the lock bolt and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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("Lock could not be opened!", "Lock reports it is still closed. Please try again!", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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("End rental", 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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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 could not be opened!", "Position of lock bolt is unknown. Lock could be closed or open. Please try again!", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.DisplayAdvancedAlert(
					"Lock could not be opened!",
					"Exception message.",
					"Please try again.",
					"OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}


		/// <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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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 = "Internet must be available for updating lock status. Please establish an Internet connection!";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <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<IGeolocationService>();
			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 behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // 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.StartAsync(); // polling must be restarted again
				bikesViewModel.ActionText = string.Empty;
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Close lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual(string.Empty, subsequent.LockitButtonText);
			Assert.That(subsequent.IsLockitButtonVisible, Is.False);
		}

		/// <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<IGeolocationService>();
			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);

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed); // Return lock state indicating success

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>()).Returns(x =>
			{
				// Add calls to ReportStep which IBikeInfoMutable implementation would do.
				handler.ReportStep(Step.ClosingLock);
				handler.ReportStep(Step.UpdateLockingState);
				return Task.CompletedTask;
			}
			);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = "Updating lock state...";
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StartAsync(); // 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("End rental", 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<IGeolocationService>();
			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);

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>())
				.Returns(async x =>
					{
						// Add calls to ReportStep which IBikeInfoMutable implementation would do.
						handler.ReportStep(Step.ClosingLock);
						await handler.ReportStateAsync(CloseCommand.State.OutOfReachError, "");
						throw new OutOfReachException();
					}
				);

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.UnknownDisconnected); /// If <see cref="OutOfReachException"/> is fired lock state is set to state unknown because disconnected.

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert("Lock could not be closed!", "Make sure you have granted Bluetooth permission to the app. Step as close as possible to the bike lock and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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<IGeolocationService>();
			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);

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>()).Returns(async x =>
			{
				// Add calls to ReportStep which IBikeInfoMutable implementation would do.
				handler.ReportStep(Step.ClosingLock);
				await handler.ReportStateAsync(State.GeneralCloseError, "Exception message.");
				throw new Exception("Exception message.");
			}
			);

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.UnknownDisconnected); // If CloseLock fires an exception of type Exception lock state is set to unknown.

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = string.Empty;
				viewService.DisplayAlert(
					"Lock could not be closed!",
					"Exception message.",
					"OK"
				);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartAsync(); // 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<IGeolocationService>();
			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);

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>()).Returns(async x =>
			{
				// Add calls to ReportStep which IBikeInfoMutable implementation would do.
				handler.ReportStep(Step.ClosingLock);
				handler.ReportStep(Step.UpdateLockingState);
				await handler.ReportStateAsync(CloseCommand.State.WebConnectFailed, "Context info");
			}
			);

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

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = "Updating lock state...";
				bikesViewModel.ActionText = "Internet must be available for updating lock status. Please establish an Internet connection!";
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StartAsync(); // 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("End rental", 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<IGeolocationService>();
			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);

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>())
					.Returns(async x =>
					{
						// Add calls to ReportStep which IBikeInfoMutable implementation would do.
						handler.ReportStep(Step.ClosingLock);
						handler.ReportStep(Step.UpdateLockingState);
						await handler.ReportStateAsync(CloseCommand.State.BackendUpdateFailed, "Exception message.");
					}
				);

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

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = "Updating lock state...";
				bikesViewModel.ActionText = "Connection error on updating locking status.";
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StartAsync(); // 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("End rental", 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<IGeolocationService>();
			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);

			bike.CloseLockAsync(Arg.Any<ICloseCommandListener>(), Arg.Any<Task>())
				.Returns(async x =>
				{
					// Add calls to ReportStep which IBikeInfoMutable implementation would do.
					handler.ReportStep(Step.ClosingLock);
					handler.ReportStep(Step.UpdateLockingState);
					await handler.ReportStateAsync(CloseCommand.State.ResponseIsInvalid, "Some invalid data received");
				}
				);

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

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behavior
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopAsync(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Stay with the bike until the lock is closed.";
				bikesViewModel.ActionText = "Updating lock state...";
				bikesViewModel.ActionText = "Status error on updating lock state.";
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StartAsync(); // 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("End rental", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}
	}
}