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

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.ActionText = "One moment please...";
                pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be opened!", "Lock was blocked and might still be. Please ensure that no obstacle prevents lock from opening and try again.", "OK");
                bikesViewModel.ActionText = "Updating...";
                pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
                bikesViewModel.ActionText = "";
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.ActionText = "One moment please...";
                pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
                bikesViewModel.ActionText = "Opening lock...";
                locks.Received()[0].OpenAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Error while opening lock!", "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 "Booked Disconnected" after action
            Assert.AreEqual(nameof(BookedDisconnected), subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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


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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption1().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.ActionText = "One moment please...";
                pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be closed!", "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 "Booked Disconnected" after action
            Assert.AreEqual("BookedDisconnected", subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

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

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

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

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

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

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

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

            var subsequent = handler.HandleRequestOption2().Result;

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

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