sharee.bike-App/SharedBusinessLogic/ViewModel/Bikes/Bike/BluetoothLock/RequestHandlerFactory.cs

using System;
using Serilog;
using ShareeBike.Model.Bikes.BikeInfoNS.BluetoothLock;
using ShareeBike.Model.Connector;
using ShareeBike.Model.Device;
using ShareeBike.Model.User;
using ShareeBike.MultilingualResources;
using ShareeBike.Services.BluetoothLock;
using ShareeBike.Services.Geolocation;
using ShareeBike.View;
using ShareeBike.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler;

namespace ShareeBike.ViewModel.Bikes.Bike.BluetoothLock
{
	public static class RequestHandlerFactory
	{
		/// <summary> Creates a request handler.</summary>
		/// <param name="selectedBike"></param>
		/// <param name="isConnectedDelegate"></param>
		/// <param name="connectorFactory"></param>
		/// <param name="geolocation"></param>
		/// <param name="viewUpdateManager"></param>
		/// <param name="smartDevice">Provides info about the smart device (phone, tablet, ...)</param>
		/// <param name="viewService"></param>
		/// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
		/// <param name="context">Specifies the context (last action performed).</param>
		/// <returns>Request handler.</returns>
		public static IRequestHandler Create(
			Model.Bikes.BikeInfoNS.BC.IBikeInfoMutable selectedBike,
			Func<bool> isConnectedDelegate,
			Func<bool, IConnector> connectorFactory,
			IGeolocationService geolocation,
			ILocksService lockService,
			Func<IPollingUpdateTaskManager> viewUpdateManager,
			ISmartDevice smartDevice,
			IViewService viewService,
			IBikesViewModel bikesViewModel,
			IUser activeUser)
		{
			if (!(selectedBike is IBikeInfoMutable selectedBluetoothLockBike))
				return null;

			switch (selectedBluetoothLockBike.State.Value)
			{
				case Model.State.InUseStateEnum.Disposable:

					// Bike is reserved, select action depending on lock state.
					switch (selectedBluetoothLockBike.LockInfo.State)
					{
						case LockingState.Open:
						case LockingState.UnknownFromHardwareError:
							// Unexpected state detected.
							/// This state is unexpected because
							/// - app does not allow to return bike/ cancel reservation when lock is closed
							/// - as long as app is connected to lock
							///     - lock can not be opened manually
							///     - no other device can access lock 
							/// Nevertheless this state is not expected let user either
							/// - close lock or
							/// - rent bike
							/// </remarks>
							Log.Error("Unexpected state {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
							return new DisposableOpen(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.Closed:
						case LockingState.UnknownDisconnected:
							// Do not allow interaction with lock before reserving bike.
							return new DisposableDisconnected(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						default:
							// Invalid state detected. Lock must never be open if bike is reserved.
							throw new ArgumentException();
					}

				case Model.State.InUseStateEnum.Reserved:

					// Bike is reserved, select action depending on lock state.
					switch (selectedBluetoothLockBike.LockInfo.State)
					{
						case LockingState.Closed:
							// Lock could not be opened after reserving bike.
							return new ReservedClosed(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.UnknownDisconnected:
							return new ReservedDisconnected(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.Open:
							// Unwanted state detected.
							/// This state might occur when a ILOCKIT was manually opened (color code) and app connects afterwards.
							Log.Error("Unwanted state {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
							return new ReservedOpen(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.UnknownFromHardwareError:
							// User wants to return bike/ pause ride.
							return new ReservedUnknown(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						default:
							// Invalid state detected. Lock must never be open if bike is reserved.
							throw new ArgumentException();
					}

				case Model.State.InUseStateEnum.Booked:

					// Bike is booked, select action depending on lock state.
					switch (selectedBluetoothLockBike.LockInfo.State)
					{
						case LockingState.Closed:
							// User wants to close lock.
							return new BookedClosed(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.Open:
							// User wants to return bike/ pause ride.
							return new BookedOpen(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.UnknownFromHardwareError:
							// User wants to return bike/ pause ride.
							return new BookedUnknown(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						case LockingState.UnknownDisconnected:
							// Invalid state detected. 
							// If bike is booked lock state must be queried before creating view model.
							return new BookedDisconnected(
								selectedBluetoothLockBike,
								isConnectedDelegate,
								connectorFactory,
								geolocation,
								lockService,
								viewUpdateManager,
								smartDevice,
								viewService,
								bikesViewModel,
								activeUser);

						default:
							// Invalid state detected. Lock must never be open if bike is reserved.
							throw new ArgumentException();
					}

				default:
					// Unexpected copri state detected.
					Log.Error("Unexpected locking {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
					return new InvalidState(
						bikesViewModel,
						selectedBluetoothLockBike.State.Value,
						selectedBluetoothLockBike.LockInfo.State,
						string.Format(AppResources.MarkingBikeInfoErrorStateUnknownDetected, selectedBluetoothLockBike.Description));
			}
		}
	}
}