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;
using IBikeInfoMutable = TINK.Model.Bikes.BikeInfoNS.BluetoothLock.IBikeInfoMutable;

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,
		   AppResources.ActionCloseLock,
		   true, // Show button "Close Lock"
		   isConnectedDelegate,
		   connectorFactory,
		   geolocation,
		   lockService,
		   viewUpdateManager,
		   smartDevice,
		   viewService,
		   bikesViewModel,
		   activeUser)
		{
			LockitButtonText = activeUser.DebugLevel.HasFlag(Model.User.Account.Permissions.ManageAlarmAndSounds) ? "Alarm/ Sounds verwalten" : AppResources.ActionRentBike;
			IsLockitButtonVisible = true; // Only users with special permissions are allowed to set alarm. Regular user gets options "Rent Bike"
		}

		/// <summary> Close lock. </summary>
		public async Task<IRequestHandler> HandleRequestOption1() => await CloseLock();

		/// <summary> Manage sound/ alarm settings or Rent bike. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> HandleRequestOption2()
			=> ActiveUser.DebugLevel.HasFlag(Model.User.Account.Permissions.ManageAlarmAndSounds)
			? await ManageLockSettings()
			: await RentBike();

		/// <summary> Rent bike. </summary>
		public async Task<IRequestHandler> RentBike()
		{
			BikesViewModel.IsIdle = false;
			Log.ForContext<ReservedOpen>().Information("User request to book bike {bikeId}.", SelectedBike.Id);

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

			// Book bike
			BikesViewModel.ActionText = AppResources.ActivityTextRentingBike;
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.DoBookAsync(SelectedBike, LockingAction.Open);
				Log.ForContext<ReservedOpen>().Information("User booked bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				Log.ForContext<ReservedOpen>().Information("Booking of bike {bikeId} failed.", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// Copri server is not reachable.
					Log.ForContext<ReservedOpen>().Error("Copri server not reachable.");

					await ViewService.DisplayAlert(
						AppResources.ErrorNoConnectionTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedOpen>().Error("{@exception}", exception);

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

			// get current charging level
			ILockService btLock = LockService[SelectedBike.LockInfo.Id];
			BikesViewModel.ActionText = AppResources.ActivityTextReadingChargingLevel;
			try
			{
				SelectedBike.LockInfo.BatteryPercentage = await btLock.GetBatteryPercentageAsync();
				Log.ForContext<ReservedOpen>().Information("Battery state of lock from {bikeId} read successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Battery state of lock from {bikeId} can not be read.", SelectedBike.Id);
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock is out of reach.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
				}
				else
				{
					Log.ForContext<ReservedOpen>().Error("{@exception}", exception);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelGeneral;
				}
			}

			// get lock infos.
			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdatingLockingState;
			var versionTdo = btLock.VersionInfo;
			if (versionTdo != null)
			{
				SelectedBike.LockInfo.VersionInfo = new VersionInfo.Builder
				{
					FirmwareVersion = versionTdo.FirmwareVersion,
					HardwareVersion = versionTdo.HardwareVersion,
					LockVersion = versionTdo.LockVersion,
				}.Build();
			}

			// update backend
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.UpdateLockingStateAsync(SelectedBike);
				Log.ForContext<ReservedOpen>().Information("Backend updated for bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Information("Updating backend for bike {bikeId} failed.", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// No web.
					Log.ForContext<ReservedOpen>().Debug("Copri server not reachable. No web.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorNoWebUpdateingLockstate;
				}
				else if (exception is ResponseException copriException)
				{
					// Copri exception.
					Log.ForContext<ReservedOpen>().Debug("{response}", copriException.Response);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorStatusUpdateingLockstate;
				}
				else
				{
					Log.ForContext<ReservedOpen>().Debug("{@exception}", exception);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorConnectionUpdateingLockstate;
				}
			}

			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, 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().StopAsync();

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

			// 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.",
					AppResources.MessageAnswerOk);

				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,
					AppResources.MessageAnswerOk);

				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.",
					AppResources.MessageAnswerOk);

				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,
					AppResources.MessageAnswerOk);

				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.",
					AppResources.MessageAnswerOk);

				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,
					AppResources.MessageAnswerOk);

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

			await ViewService.DisplayAlert(
				AppResources.MessageHintTitle,
				"Alarm und Sounds erfolgreich abgeschalten.",
				AppResources.MessageAnswerOk);

			return this;
		}

		public async Task<IRequestHandler> CloseLock()
		{
			BikesViewModel.IsIdle = false;
			// Stop polling before requesting bike.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopAsync();

			Log.ForContext<ReservedOpen>().Information("User request to close lock of bike {bikeId}.", SelectedBike.Id);
			BikesViewModel.ActionText = AppResources.ActivityTextClosingLock;
			try
			{
				SelectedBike.LockInfo.State = (await LockService[SelectedBike.LockInfo.Id].CloseAsync())?.GetLockingState() ?? LockingState.UnknownDisconnected;
				Log.ForContext<ReservedOpen>().Information("Lock of bike {bikeId} closed successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Information("Lock of bike {bikeId} can not be closed.", SelectedBike.Id);
				BikesViewModel.ActionText = string.Empty;
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock is out of reach.");

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorLockOutOfReach,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntCloseMovingException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock is moving.");

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorLockMoving,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntCloseBoltBlockedException)
				{
					Log.ForContext<ReservedOpen>().Debug("Bold is blocked.");

					await ViewService.DisplayAlert(
						AppResources.ErrorCloseLockTitle,
						AppResources.ErrorCloseLockBoltBlocked,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedOpen>().Debug("{@exception}", exception);

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorCloseLockTitle,
						exception.Message,
						AppResources.ErrorTryAgain,
						AppResources.MessageAnswerOk);
				}

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

			// get current charging level
			ILockService btLock = LockService[SelectedBike.LockInfo.Id];
			BikesViewModel.ActionText = AppResources.ActivityTextReadingChargingLevel;
			try
			{
				SelectedBike.LockInfo.BatteryPercentage = await btLock.GetBatteryPercentageAsync();
				Log.ForContext<ReservedOpen>().Information("Battery state of lock from {bikeId} read successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Information("Battery state of lock from {bikeId} can not be read.", SelectedBike.Id);
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedOpen>().Debug("Lock is out of reach.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
				}
				else
				{
					Log.ForContext<ReservedOpen>().Debug("{@exception}", exception);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelGeneral;
				}
			}

			// get lock infos.
			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdatingLockingState;
			var versionTdo = btLock.VersionInfo;
			if (versionTdo != null)
			{
				SelectedBike.LockInfo.VersionInfo = new VersionInfo.Builder
				{
					FirmwareVersion = versionTdo.FirmwareVersion,
					HardwareVersion = versionTdo.HardwareVersion,
					LockVersion = versionTdo.LockVersion,
				}.Build();
			}

			// update backend
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.UpdateLockingStateAsync(SelectedBike);
				Log.ForContext<ReservedOpen>().Information("Backend updated for bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Information("Updating backend for bike {bikeId} failed .", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// No web.
					Log.ForContext<ReservedOpen>().Information("Copri server not reachable. No web.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorNoWebUpdateingLockstate;
				}
				else if (exception is ResponseException copriException)
				{
					// Copri exception.
					Log.ForContext<ReservedOpen>().Debug("{response}.", copriException.Response);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorStatusUpdateingLockstate;
				}
				else
				{
					Log.ForContext<ReservedOpen>().Debug("{@exception}", exception);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorConnectionUpdateingLockstate;
				}
			}

			// Ask whether to cancel reservation
			var result = await ViewService.DisplayAlert(
				string.Empty,
				string.Format(AppResources.QuestionCancelReservation, SelectedBike.GetFullDisplayName()),
				AppResources.MessageAnswerYes,
				AppResources.MessageAnswerNo);

			if (result == true)
			{
				Log.ForContext<ReservedOpen>().Information("User request to cancel reservation of bike {bikeId}.", SelectedBike.Id);

				BikesViewModel.ActionText = AppResources.ActivityTextCancelingReservation;
				IsConnected = IsConnectedDelegate();
				try
				{
					await ConnectorFactory(IsConnected).Command.DoCancelReservation(SelectedBike);
					Log.ForContext<ReservedOpen>().Information("User canceled reservation of bike {bikeId} successfully.", SelectedBike.Id);
				}
				catch (Exception exception)
				{
					BikesViewModel.ActionText = string.Empty;
					Log.ForContext<ReservedOpen>().Information("Canceling reservation of bike {bikeId} failed.", SelectedBike.Id);
					if (exception is InvalidAuthorizationResponseException)
					{
						// Copri response is invalid.
						Log.ForContext<ReservedOpen>().Debug("Invalid auth. response.");

						await ViewService.DisplayAlert(
							AppResources.ErrorCancelReservationTitle,
							AppResources.ErrorAccountInvalidAuthorization,
							AppResources.MessageAnswerOk);
					}
					else if (exception is WebConnectFailureException
						|| exception is RequestNotCachableException)
					{
						// No web.
						Log.ForContext<ReservedOpen>().Debug("Copri server not reachable. No web.");
						await ViewService.DisplayAlert(
							AppResources.ErrorCancelReservationTitle,
							AppResources.ErrorNoWeb,
							AppResources.MessageAnswerOk);
					}
					else
					{
						Log.ForContext<ReservedOpen>().Debug("{@exception}.", exception);
						await ViewService.DisplayAdvancedAlert(
							AppResources.ErrorCancelReservationTitle,
							exception.Message,
							AppResources.ErrorTryAgain,
							AppResources.MessageAnswerOk);
					}
				}
			}

			// Disconnect lock.
			if (SelectedBike.LockInfo.State == LockingState.Closed)
			{
				BikesViewModel.ActionText = AppResources.ActivityTextDisconnectingLock;
				try
				{
					SelectedBike.LockInfo.State = await LockService.DisconnectAsync(SelectedBike.LockInfo.Id, SelectedBike.LockInfo.Guid);
					Log.ForContext<ReservedOpen>().Information("Lock of bike {bikeId} disconnected successfully.", SelectedBike.Id);
				}
				catch (Exception exception)
				{
					Log.ForContext<ReservedOpen>().Information("Lock of bike {bikeId} can not be disconnected. {@exception}", SelectedBike.Id, exception);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
				}
			}

			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
			await ViewUpdateManager().StartAsync();
			BikesViewModel.ActionText = string.Empty;
			BikesViewModel.IsIdle = true;
			return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}
	}
}