using System;
using System.Threading.Tasks;
using Serilog;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Connector;
using TINK.Model.Device;
using TINK.Model.User;
using TINK.MultilingualResources;
using TINK.Repository.Exception;
using TINK.Services.BluetoothLock;
using TINK.Services.BluetoothLock.Exception;
using TINK.Services.CopriApi.Exception;
using TINK.Services.Geolocation;
using TINK.View;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	/// <summary> Bike is reserved, lock is open and connected to app. </summary>
	/// <remarks> 
	/// This state might occur when a ILOCKIT was manually opened (color code) and app connects afterwards. 
	/// This should never during ILOCKIT is connected to app because
	/// - manually opening lock is not possible when lock is connected
	/// - two devices can not simultaneously connect to same lock.
	public class ReservedOpen : 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 ReservedOpen(
		   IBikeInfoMutable selectedBike,
		   Func<bool> isConnectedDelegate,
		   Func<bool, IConnector> connectorFactory,
		   IGeolocationService geolocation,
		   ILocksService lockService,
		   Func<IPollingUpdateTaskManager> viewUpdateManager,
		   ISmartDevice smartDevice,
		   IViewService viewService,
		   IBikesViewModel bikesViewModel,
		   IUser activeUser) : base(
		   selectedBike,
		   "Rad zurückgeben oder mieten",
		   true, // Show button to enable canceling reservation.
		   isConnectedDelegate,
		   connectorFactory,
		   geolocation,
		   lockService,
		   viewUpdateManager,
		   smartDevice,
		   viewService,
		   bikesViewModel,
		   activeUser)
		{
			LockitButtonText = "Alarm/ Sounds verwalten";
			IsLockitButtonVisible = activeUser.DebugLevel > 0; // Will be visible in future version of user with leveraged privileges.
		}

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

		/// <summary> Manage sound/ alarm settings. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> HandleRequestOption2() => await ManageLockSettings();

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

			var l_oResult = await ViewService.DisplayAlert(
				string.Empty,
				string.Format("Rad {0} abschließen und zurückgeben oder Rad mieten?", SelectedBike.GetFullDisplayName()),
				"Zurückgeben",
				"Mieten");

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

			if (l_oResult == false)
			{
				// User decided to book                
				Log.ForContext<ReservedOpen>().Information("User selected requested bike {bike} in order to book.", SelectedBike);

				BikesViewModel.ActionText = AppResources.ActivityTextReadingChargingLevel;
				try
				{
					SelectedBike.LockInfo.BatteryPercentage = await LockService[SelectedBike.LockInfo.Id].GetBatteryPercentageAsync();
				}
				catch (Exception exception)
				{
					if (exception is OutOfReachException)
					{
						Log.ForContext<ReservedOpen>().Debug("Battery state can not be read, bike out of range. {Exception}", exception);

						BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
					}
					else
					{
						Log.ForContext<ReservedOpen>().Error("Battery state can not be read. {Exception}", exception);

						BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelGeneral;
					}
				}

				// Notify copri about unlock action in order to start booking.
				BikesViewModel.ActionText = AppResources.ActivityTextRentingBike;
				IsConnected = IsConnectedDelegate();
				try
				{
					await ConnectorFactory(IsConnected).Command.DoBookAsync(SelectedBike);
				}
				catch (Exception l_oException)
				{
					BikesViewModel.ActionText = string.Empty;

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

						await ViewService.DisplayAlert(
							AppResources.MessageRentingBikeErrorConnectionTitle,
							string.Format(AppResources.MessageErrorLockIsClosedThreeLines, l_oException.Message, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
							AppResources.MessageAnswerOk);
					}
					else
					{
						Log.ForContext<ReservedOpen>().Error("User selected requested bike {l_oId} but reserving failed. {@l_oException}", SelectedBike.Id, l_oException);

						await ViewService.DisplayAlert(
							AppResources.MessageRentingBikeErrorGeneralTitle,
							string.Format(AppResources.MessageErrorLockIsClosedTwoLines, l_oException.Message),
							AppResources.MessageAnswerOk);
					}

					// If booking failed lock bike again because bike is only reserved.
					BikesViewModel.ActionText = "Wiederverschließe Schloss...";
					try
					{
						SelectedBike.LockInfo.State = (await LockService[SelectedBike.LockInfo.Id].CloseAsync())?.GetLockingState() ?? LockingState.UnknownDisconnected;
					}
					catch (Exception exception)
					{
						Log.ForContext<ReservedOpen>().Error("Locking bike after booking failure failed. {Exception}", exception);

						SelectedBike.LockInfo.State = exception is StateAwareException stateAwareException
							? stateAwareException.State
							: LockingState.UnknownDisconnected;
					}

					BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
					await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

					BikesViewModel.ActionText = string.Empty;
					BikesViewModel.IsIdle = true; // Unlock GUI
					return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
				}

				Log.ForContext<ReservedOpen>().Information("User booked bike {bike} successfully.", SelectedBike);

				BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
				await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true; // Unlock GUI
				return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			// Close lock and cancel reservation.
			Log.ForContext<ReservedClosed>().Information("User selected reserved bike {l_oId} in order to cancel reservation.", SelectedBike.Id);
			BikesViewModel.ActionText = AppResources.ActivityTextClosingLock;
			try
			{
				SelectedBike.LockInfo.State = (await LockService[SelectedBike.LockInfo.Id].CloseAsync())?.GetLockingState() ?? LockingState.UnknownDisconnected;
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock can not be closed. {Exception}", exception);

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorCloseLockOutOfReachStateReservedMessage,
						"OK");
				}
				else if (exception is CouldntCloseMovingException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock can not be closed. Lock bike is moving. {Exception}", exception);

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorCloseLockMovingMessage,
						"OK");
				}
				else if (exception is CouldntCloseBoldBlockedException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorCloseLockBoldBlockedMessage,
						"OK");
				}
				else
				{
					Log.ForContext<ReservedOpen>().Error("Lock can not be closed. {Exception}", exception);

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						string.Format(AppResources.ErrorCloseLockUnkErrorMessage, exception.Message),
						"OK");
				}

				SelectedBike.LockInfo.State = exception is StateAwareException stateAwareException
					? stateAwareException.State
					: LockingState.UnknownDisconnected;

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

			BikesViewModel.ActionText = AppResources.ActivityTextCancelingReservation;
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.DoCancelReservation(SelectedBike);

				// If canceling bike succeeds remove bike because it is not ready to be booked again
				IsRemoveBikeRequired = true;
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = String.Empty;

				if (exception is InvalidAuthorizationResponseException)
				{
					// Copri response is invalid.
					Log.ForContext<ReservedOpen>().Error("User selected reserved bike {l_oId} but canceling reservation failed (Invalid auth. response).", SelectedBike.Id);
					await ViewService.DisplayAlert(
						AppResources.MessageCancelReservationBikeErrorGeneralTitle,
						exception.Message,
						AppResources.MessageAnswerOk);
				}
				else if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<ReservedOpen>().Information("User selected reserved bike {l_oId} but cancel reservation failed (Copri server not reachable).", SelectedBike.Id);
					await ViewService.DisplayAlert(
						AppResources.MessageCancelReservationBikeErrorConnectionTitle,
						string.Format("{0}\r\n{1}", exception.Message, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedOpen>().Error("User selected reserved bike {l_oId} but cancel reservation failed. {@l_oException}.", SelectedBike.Id, exception);
					await ViewService.DisplayAlert(
						AppResources.MessageCancelReservationBikeErrorGeneralTitle,
						exception.Message,
						"OK");
				}

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

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

			// Disconnect lock.
			BikesViewModel.ActionText = AppResources.ActivityTextDisconnectingLock;
			try
			{
				SelectedBike.LockInfo.State = await LockService.DisconnectAsync(SelectedBike.LockInfo.Id, SelectedBike.LockInfo.Guid);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedClosed>().Error("Lock can not be disconnected. {Exception}", exception);

				BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
			}

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

		/// <summary> Manage sound/ alarm settings. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> ManageLockSettings()
		{
			// Stop polling before requesting bike.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopUpdatePeridically();

			// Close lock
			Log.ForContext<ReservedOpen>().Information("User selected disposable bike {bike} in order to manage sound/ alarm settings.", SelectedBike);

			// Alarm and sounds are on, toggle to off.
			// Switch off sound.
			BikesViewModel.ActionText = "Abschalten der Sounds...";
			try
			{
				await LockService[SelectedBike.LockInfo.Id].SetSoundAsync(SoundSettings.Warn);
			}
			catch (OutOfReachException exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Can not turn off sounds. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Abschalten der Sounds!",
					"Sounds können erst abgeschalten werden, wenn Rad in der Nähe ist.",
					"OK");

				return this;
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Error("Can not turn off sounds. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Abschalten der Sounds!",
					exception.Message,
					"OK");

				return this;
			}

			// Lower alarm sensivity.
			BikesViewModel.ActionText = "Setzen Alarm-Einstellungen...";
			try
			{
				await LockService[SelectedBike.LockInfo.Id].SetAlarmSettingsAsync(AlarmSettings.SmallSensivitySilent);
			}
			catch (OutOfReachException exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Can not set alarm settings. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Setzen der Alarm-Einstellungen!",
					"Alarm kann erst eingestellt werden, wenn Rad in der Nähe ist.",
					"OK");

				return this;
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Error("Can not set alarm settings. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Setzen der Alarms-Einstellungen!",
					exception.Message,
					"OK");

				return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			// Switch off alarm.
			BikesViewModel.ActionText = "Abschalten von Alarm...";
			try
			{
				await LockService[SelectedBike.LockInfo.Id].SetIsAlarmOffAsync(true);
			}
			catch (OutOfReachException exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Can not turn off alarm settings. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Abschalten des Alarms!",
					"Alarm kann erst abgeschalten werden, wenn Rad in der Nähe ist.",
					"OK");

				return this;
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Error("Can not turn off alarm. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Abschalten des Alarms!",
					exception.Message,
					"OK");

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

			await ViewService.DisplayAlert(
				"Hinweis",
				"Alarm und Sounds erfolgreich abgeschalten.",
				"OK");

			return this;
		}
	}
}