sharee.bike-App/SharedBusinessLogic/ViewModel/Bikes/Bike/CopriLock/RequestHandler/ReservedClosed.cs

using System;
using System.Threading.Tasks;
using Serilog;
using ShareeBike.Model.Bikes.BikeInfoNS.CopriLock;
using ShareeBike.Model.Connector;
using ShareeBike.Model.Device;
using ShareeBike.Model.User;
using ShareeBike.MultilingualResources;
using ShareeBike.Repository.Exception;
using ShareeBike.Services.CopriApi.Exception;
using ShareeBike.View;

namespace ShareeBike.ViewModel.Bikes.Bike.CopriLock.RequestHandler
{
	using IRequestHandler = BluetoothLock.IRequestHandler;

	/// <summary> Bike is reserved, lock is closed and connected to app. </summary>
	/// <remarks> 
	/// Occurs when 
	/// - bike was reserved out of reach and is in reach now
	/// - bike is reserved while in reach
	/// </remarks>
	public class ReservedClosed : Base, IRequestHandler
	{
		/// <param name="smartDevice">Provides info about the smart device (phone, tablet, ...)</param>
		/// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
		public ReservedClosed(
		   IBikeInfoMutable selectedBike,
		   Func<bool> isConnectedDelegate,
		   Func<bool, IConnector> connectorFactory,
		   Func<IPollingUpdateTaskManager> viewUpdateManager,
		   ISmartDevice smartDevice,
		   IViewService viewService,
		   IBikesViewModel bikesViewModel,
		   IUser activeUser) : base(
			   selectedBike,
			   AppResources.ActionCancelReservation, // Copri button text: "Reservierung abbrechen"
			   true, // Show button to enable canceling reservation.
			   isConnectedDelegate,
			   connectorFactory,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = AppResources.ActionOpenLockAndRentBike; // Button text: "Schloss öffnen & Rad mieten"
			IsLockitButtonVisible = true; // Show "Öffnen" button to enable unlocking
		}

		/// <summary> Cancel reservation. </summary>
		public async Task<IRequestHandler> HandleRequestOption1() => await CancelReservation();

		/// <summary> Open lock and book bike. </summary>
		public async Task<IRequestHandler> HandleRequestOption2() => await OpenLockAndDoBook();

		/// <summary> Cancel reservation. </summary>
		public async Task<IRequestHandler> CancelReservation()
		{
			BikesViewModel.IsIdle = false; // Lock list to avoid multiple taps while copri action is pending.

			var result = await ViewService.DisplayAlert(
				string.Empty,
				string.Format(AppResources.QuestionCancelReservation, SelectedBike.GetFullDisplayName()),
				AppResources.MessageAnswerYes,
				AppResources.MessageAnswerNo);

			if (result == false)
			{
				// User aborted cancel process
				Log.ForContext<ReservedClosed>().Information("User selected reserved bike {Id} in order to cancel reservation but action was canceled.", SelectedBike.Id);
				BikesViewModel.IsIdle = true;
				return this;
			}

			Log.ForContext<ReservedClosed>().Information("User selected reserved bike {Id} in order to cancel reservation.", SelectedBike.Id);

			// Stop polling before cancel request.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopAsync();

			BikesViewModel.ActionText = AppResources.ActivityTextCancelingReservation;
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.DoCancelReservation(SelectedBike);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

				if (exception is InvalidAuthorizationResponseException)
				{
					// Copri response is invalid.
					Log.ForContext<BikesViewModel>().Error("User selected reserved bike {Id} but canceling reservation failed (Invalid auth. response).", SelectedBike.Id);

					await ViewService.DisplayAlert(
						AppResources.ErrorCancelReservationTitle,
						exception.Message,
						AppResources.MessageAnswerOk);
				}
				else if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<BikesViewModel>().Information("User selected reserved bike {Id} but cancel reservation failed (Copri server not reachable).", SelectedBike.Id);
					await ViewService.DisplayAlert(
						AppResources.ErrorCancelReservationTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<BikesViewModel>().Error("User selected reserved bike {Id} but cancel reservation failed. {@Exception}.", SelectedBike.Id, exception);
					await ViewService.DisplayAlert(
						AppResources.ErrorCancelReservationTitle,
						exception.Message,
						AppResources.MessageAnswerOk);
				}

				BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
				await ViewUpdateManager().StartAsync(); // Restart polling again.            
				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true; // Unlock GUI                
				return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			Log.ForContext<BikesViewModel>().Information("User canceled reservation of bike {Id} successfully.", SelectedBike.Id);

			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
			await ViewUpdateManager().StartAsync(); // Restart polling again.            
			BikesViewModel.ActionText = string.Empty;
			BikesViewModel.IsIdle = true; // Unlock GUI
			return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}

		/// <summary> Open lock and book bike. </summary>
		public async Task<IRequestHandler> OpenLockAndDoBook()
		{
			BikesViewModel.IsIdle = false;

			// Ask whether to really book bike?
			var l_oResult = await ViewService.DisplayAlert(
				string.Empty,
				string.Format(AppResources.QuestionOpenLockAndBookBike, SelectedBike.GetFullDisplayName()),
				AppResources.MessageAnswerYes,
				AppResources.MessageAnswerNo);

			if (l_oResult == false)
			{
				// User aborted booking process
				Log.ForContext<ReservedClosed>().Information("User selected requested bike {bike} in order to book but action was canceled.", SelectedBike);
				BikesViewModel.IsIdle = true;
				return this;
			}

			Log.ForContext<ReservedClosed>().Information("User selected requested bike {bike} in order to book.", SelectedBike);

			// Stop polling before cancel request.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopAsync();

			// Book bike prior to opening lock.
			BikesViewModel.ActionText = AppResources.ActivityTextRentingBike;
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.BookAndOpenAync(SelectedBike);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

				if (exception is WebConnectFailureException)
				{
					// Copri server is not reachable.
					Log.ForContext<ReservedClosed>().Information("User selected requested bike {Id} but booking failed (Copri server not reachable).", SelectedBike.Id);

					await ViewService.DisplayAlert(
						AppResources.ErrorNoConnectionTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedClosed>().Error("User selected requested bike {Id} but reserving failed. {@Exception}", SelectedBike.Id, exception);

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorRentingBikeTitle,
						exception.Message,
						string.Empty,
						AppResources.MessageAnswerOk);
				}

				BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
				await ViewUpdateManager().StartAsync(); // Restart polling again.
				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true; // Unlock GUI
				return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			Log.ForContext<ReservedClosed>().Information("User booked and opened bike {bike} successfully.", SelectedBike.Id);
			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
			await ViewUpdateManager().StartAsync(); // Restart polling again.
			BikesViewModel.ActionText = string.Empty;
			BikesViewModel.IsIdle = true; // Unlock GUI
			return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}
	}
}