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

namespace TestShareeLib.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    [TestFixture]
    public class TestReservedClosed
    {
        /// <summary>
        /// Test construction of object.
        /// </summary>
        [Test]
        public void Testctor()
        {
            var handler = new ReservedClosed(
                Substitute.For<IBikeInfoMutable>(),
                () => true, // isConnectedDelegate
                (isConnexted) => Substitute.For<IConnector>(),
                Substitute.For<IGeolocation>(),
                Substitute.For<ILocksService>(),
                () => Substitute.For<IPollingUpdateTaskManager>(),
                Substitute.For<IViewService>(),
                Substitute.For<IBikesViewModel>(),
                Substitute.For<IUser>());

            // Verify prerequisites.
            Assert.AreEqual("Cancel bike reservation", handler.ButtonText);
            Assert.IsTrue(handler.IsButtonVisible);
            Assert.AreEqual("Open lock & rent bike", handler.LockitButtonText);
            Assert.IsTrue(handler.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Cancel reservation.
        /// Comment: User deceide to abort cancelling (user is ased whether to really cancel)
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCancelReservationCancel()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(false));

            var subsequent = handler.HandleRequestOption1().Result;

            locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No");
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

        /// <summary>
        /// Use case: Cancel reservation.
        /// Final state: Disposable.
        /// </summary>
        [Test]
        public void TestCancelReservation()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));
            bike.State.Value.Returns(InUseStateEnum.Disposable); // Reqesthandler factory queries state to create appropriate request handler object.
            bike.LockInfo.State.Returns(LockingState.Disconnected); // Requsthandler factory queries lock state to create appropriate request handler object.

            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 = "Canceling reservation...";
                connector.Command.DoCancelReservation(bike); // Booking must be performed
                bikesViewModel.ActionText = "Disconnecting lock...";
                locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state after action
            Assert.AreEqual("Reserve bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
            Assert.IsFalse(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Cancel reservation.
        /// Comment: Exception is thrown.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCancelReservationDoCancelReservationInvalidAuthorizationResponseException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            var response = JsonConvert.DeserializeObject<AuthorizationResponse>(@"
            {
                  ""response"" : ""authorization"",
                  ""authcookie"" : ""4da3044c8657a04ba60e2eaa753bc51a"",
                  ""user_group"" : ""TINK,Konrad"",
                  ""response_state"" : ""OK"",
                  ""apiserver"" : ""https://tinkwwp.copri-bike.de""
               }");

            connector.Command.DoCancelReservation(bike).Returns(x => throw new InvalidAuthorizationResponseException("mustermann@server.de", response));
            bike.State.Value.Returns(InUseStateEnum.Reserved); // Reqesthandler factory queries state to create appropriate request handler object.
            bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

            var subsequent = handler.HandleRequestOption1().Result;

            locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

            // 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 = "Canceling reservation...";
                connector.Command.DoCancelReservation(bike); // Booking must be performed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Fehler beim Aufheben der Reservierung!", "Kann Benutzer mustermann@server.de nicht anmelden. Mailadresse unbekannt oder Passwort ungültig.", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

        /// <summary>
        /// Use case: Cancel reservation.
        /// Comment: Canceling reservation fails.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCancelReservationDoCancelReservationWebConnectFailureException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            connector.Command.DoCancelReservation(bike).Returns(x => throw new WebConnectFailureException("Context info.", new Exception("chub")));
            bike.State.Value.Returns(InUseStateEnum.Reserved); // Reqesthandler factory queries state to create appropriate request handler object.
            bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

            var subsequent = handler.HandleRequestOption1().Result;

            locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

            // 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 = "Canceling reservation...";
                connector.Command.DoCancelReservation(bike); // Booking must be performed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Verbingungsfehler beim Aufheben der Reservierung!", "Context info.\r\nIst WLAN verfügbar/ Mobilfunknetz vefügbar und mobile Daten aktiviert / ... ?", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

        /// <summary>
        /// Use case: Cancel reservation.
        /// Comment: Canceling reservation fails.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCancelReservationDoCancelReservationException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Cancel reservation for bike {0}?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            connector.Command.DoCancelReservation(bike).Returns(x => throw new Exception("Exception message."));
            bike.State.Value.Returns(InUseStateEnum.Reserved); // Reqesthandler factory queries state to create appropriate request handler object.
            bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

            var subsequent = handler.HandleRequestOption1().Result;

            locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

            // 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 = "Canceling reservation...";
                connector.Command.DoCancelReservation(bike); // Booking must be performed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Fehler beim Aufheben der Reservierung!", "Exception message.", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: user cancels operation.
        /// Final state: Reserved and closed.
        /// </summary>
        [Test]
        public void TestBookAndOpenCancelBook()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(false));

            var subsequent = handler.HandleRequestOption2().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpen()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to 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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].GetBatteryPercentageAsync();
                bikesViewModel.ActionText = "Updating lock state...";
                connector.Command.UpdateLockingStateAsync(bike, null);
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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 and book bike.
        /// Comment: COPRI request to book bike fails (WebConnectFailureException). Lock is opened and closed again.
        /// Final state: Reserved closed.
        /// </summary>
        [Test]
        public void TestBookAndOpenBookingFailsWebConnectFailureException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            bike.LockInfo.State.Returns(LockingState.Closed); // Locking state does not change.

            connector.Command.DoBook(bike).Returns(x => throw new WebConnectFailureException("Context info", new Exception("Tst")));

            bike.State.Value.Returns(InUseStateEnum.Reserved); // State remains reserved because booking request failed.

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "";
                viewService.DisplayAdvancedAlert(
                    "Connection error when renting the bike!",
                    "Ist WLAN verfügbar/ Mobilfunknetz vefügbar und mobile Daten aktiviert / ... ?",
                    "Context info",
                    "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state "reserved closed" after action
            Assert.AreEqual("Cancel bike reservation", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & rent bike", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: COPRI request to book bike fails (Exception). Lock is opened and closed again.
        /// Final state: Reserved closed.
        /// </summary>
        [Test]
        public void TestBookAndOpenBookingFailsException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            bike.LockInfo.State.Returns(LockingState.Closed); // Locking state does not change.

            connector.Command.DoBook(bike).Returns(x => throw new Exception("Exception message."));

            bike.State.Value.Returns(InUseStateEnum.Reserved); // When booking fails state remains reserved.

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "";
                viewService.DisplayAdvancedAlert(
                    "Error when renting the bike!",
                    "",
                    "Exception message.",
                    "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state "reserved closed" after action
            Assert.AreEqual("Cancel bike reservation", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & rent bike", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Open lock and book bike, 
        /// Comment: Unlocking bike throws an OutOfReach-Exception.
        /// Final state: Reserved unknown.
        /// </summary>
        [Test]
        public void TestBookAndOpenOpenFailsExceptionOutOfReachException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Reserved); // Booking call leads to setting of state to booked.
            bike.LockInfo.State.Returns(LockingState.Unknown);

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be opened!", "Lock cannot be opened until bike is near.", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state after action
            Assert.AreEqual("Cancel bike reservation", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: Unlocking bike throws an exception.
        /// Final state: Reserved unknown.
        /// </summary>
        [Test]
        public void TestBookAndOpenOpenFailsException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

            locks[0].OpenAsync()
                .Returns<Task<LockitLockingState?>>(x => throw new Exception("Exception message.")); // Return lock state indicating success

            bike.State.Value.Returns(TINK.Model.State.InUseStateEnum.Reserved); // Booking call leads to setting of state to booked.
            bike.LockInfo.State.Returns(LockingState.Unknown);

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be opened!", "Exception message.", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state after action
            Assert.AreEqual("Cancel bike reservation", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: Unlocking bike does not return state bike opened.
        /// Final state: Reserved unknown.
        /// </summary>
        [Test]
        public void TestBookAndOpenOpenFailsNotOpen()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Reserved); // Booking state does not change.

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state after action
            Assert.AreEqual("Cancel bike reservation", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Open lock and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpenBatteryPercentageOutOfReachException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to booked.
            
            locks[0].GetBatteryPercentageAsync().Returns<Task<double>>(x => throw new OutOfReachException());

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].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 = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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 and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpenBatteryPercentageException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to booked.

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

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].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 = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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 and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpenUpdateLockingStateFailsWebConnectFailureException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to booked.

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

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].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 = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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 and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpenUpdateLockingStateFailsException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to booked.

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

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].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 = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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 and book bike.
        /// Comment: Bike gets opened.
        /// Final state: Booked open.
        /// </summary>
        [Test]
        public void TestBookAndOpenUpdateLockingStateFailsResponseException()
        {
            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 ReservedClosed(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, string.Format("Rent bike {0} and open lock?", "Nr. 0"), "Yes", "No").Returns(Task.FromResult(true));

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking call leads to setting of state to booked.

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

            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 = "Renting bike...";
                connector.Command.DoBook(bike); // Booking must be performed
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be opened
                bikesViewModel.ActionText = "Reading charging level...";
                locks[bike.Id].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 = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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