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 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,
		   IGeolocationService geolocation,
		   ILocksService lockService,
		   Func<IPollingUpdateTaskManager> viewUpdateManager,
		   ISmartDevice smartDevice,
		   IViewService viewService,
		   IBikesViewModel bikesViewModel,
		   IUser activeUser) : base(
			   selectedBike,
			   AppResources.ActionCancelReservation, // Cancel Reservation
			   true, // Show button "Cancel Reservation"
			   isConnectedDelegate,
			   connectorFactory,
			   geolocation,
			   lockService,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = AppResources.ActionOpenLockAndRentBike; // Open Lock & Rent Bike
			IsLockitButtonVisible = true; // Show button "Open Lock & Rent Bike"
		}

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

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

		/// <summary> Cancel reservation. </summary>
		public async Task<IRequestHandler> CancelReservation()
		{
			Log.ForContext<ReservedClosed>().Information("User request to cancel reservation of bike {bikeId}", SelectedBike.Id);
			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 canceled request to cancel reservation of bike {bikeId}.", SelectedBike.Id);
				BikesViewModel.IsIdle = true;
				return this;
			}

			// 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);
				Log.ForContext<ReservedClosed>().Information("User canceled reservation of bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				Log.ForContext<ReservedClosed>().Information("Canceling reservation of bike {bikeId} failed.", SelectedBike.Id);
				if (exception is InvalidAuthorizationResponseException)
				{
					// Copri response is invalid.
					Log.ForContext<ReservedClosed>().Error("Invalid auth. response.");

					await ViewService.DisplayAlert(
						AppResources.ErrorCancelReservationTitle,
						AppResources.ErrorAccountInvalidAuthorization,
						AppResources.MessageAnswerOk);
				}
				else if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<ReservedClosed>().Error("Copri server not reachable.");
					await ViewService.DisplayAlert(
						AppResources.ErrorCancelReservationTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedClosed>().Error("{@exception}", exception);
					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorCancelReservationTitle,
						exception.Message,
						AppResources.ErrorTryAgain,
						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, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

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

			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> Open lock and rent bike. </summary>
		public async Task<IRequestHandler> OpenLockAndRentBike()
		{
			Log.ForContext<ReservedClosed>().Information("User request to book and open bike {bikeId}.", SelectedBike.Id);
			BikesViewModel.IsIdle = false;

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

			if (alertResult == false)
			{
				// User aborted booking process
				Log.ForContext<ReservedClosed>().Information("User canceled request to book bike {bikeId}.", SelectedBike.Id);
				BikesViewModel.IsIdle = true;
				return this;
			}

			// 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.DoBookAsync(SelectedBike, LockingAction.Open);
				Log.ForContext<ReservedClosed>().Information("User booked bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				Log.ForContext<ReservedClosed>().Information("Booking of bike {bikeId} failed.", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// Copri server is not reachable.
					Log.ForContext<ReservedClosed>().Error("Copri server not reachable.");

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

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorRentingBikeTitle,
						AppResources.ErrorTryAgain,
						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, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			// Unlock bike.
			BikesViewModel.ActionText = AppResources.ActivityTextOpeningLock;
			ILockService btLock = LockService[SelectedBike.LockInfo.Id];
			try
			{
				SelectedBike.LockInfo.State = (await btLock.OpenAsync())?.GetLockingState() ?? LockingState.UnknownDisconnected;
				Log.ForContext<ReservedClosed>().Information("Lock from {bikeId} opened successfully.",SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedClosed>().Information("Lock from {bikeId} can not be opened.", SelectedBike.Id);
				BikesViewModel.ActionText = string.Empty;
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedClosed>().Debug("Lock is out of reach.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorLockOutOfReach,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenBoldIsBlockedException)
				{
					Log.ForContext<ReservedClosed>().Debug("Bold is blocked.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockBoldBlocked,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenBoldStatusIsUnknownException)
				{
					Log.ForContext<ReservedClosed>().Debug("Bold status is unknown.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockStatusUnknown,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenInconsistentStateExecption inconsistentState
						&& inconsistentState.State == LockingState.Closed)
				{
					Log.ForContext<ReservedClosed>().Debug("Lock reports that it is still closed.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockStillClosed,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedClosed>().Debug("{@exception}", exception);
					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorTryAgain,
						exception.Message,
						AppResources.MessageAnswerOk);
				}

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

			}

			// get current charging level
			BikesViewModel.ActionText = AppResources.ActivityTextReadingChargingLevel;
			try
			{
				SelectedBike.LockInfo.BatteryPercentage = await btLock.GetBatteryPercentageAsync();
				Log.ForContext<ReservedClosed>().Information("Battery state of lock from {bikeId} read successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedClosed>().Information("Battery state of lock from {bikeId} can not be read.", SelectedBike.Id);
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedClosed>().Debug("Lock is out of reach.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
				}
				else
				{
					Log.ForContext<ReservedClosed>().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<ReservedClosed>().Information("Backend updated for bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedClosed>().Information("Updating backend for bike {bikeId} failed.", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// No web.
					Log.ForContext<ReservedClosed>().Debug("Copri server not reachable. No web.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorNoWebUpdateingLockstate;
				}
				else if (exception is ResponseException copriException)
				{
					// Copri exception.
					Log.ForContext<ReservedClosed>().Debug("{response}", copriException.Response);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorStatusUpdateingLockstate;
				}
				else
				{
					Log.ForContext<ReservedClosed>().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);
		}
	}
}