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.BluetoothLock.Tdo;
using TINK.Services.CopriApi.Exception;
using TINK.Services.Geolocation;
using TINK.View;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	public class DisposableDisconnected : 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 DisposableDisconnected(
		   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.ActionReserveBike, // Reserve Bike
			   true, // Show button "Reserve Bike"
			   isConnectedDelegate,
			   connectorFactory,
			   geolocation,
			   lockService,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = GetType().Name;
			IsLockitButtonVisible = false; // If bike is not reserved/ rented app can not connect to lock
		}

		/// <summary>Reserve bike, connect to lock, open lock and rent bike.</summary>
		public async Task<IRequestHandler> HandleRequestOption1() => await ReserveRentBikeAndOpenLock();

		public async Task<IRequestHandler> HandleRequestOption2() => await UnsupportedRequest();

		/// <summary>Reserve and rent bike.</summary>
		public async Task<IRequestHandler> ReserveRentBikeAndOpenLock()
		{
			Log.ForContext<DisposableDisconnected>().Information("User request to reserve bike {bikeId}.", SelectedBike.Id);
			BikesViewModel.IsIdle = false;

			// Ask whether to really reserve bike?
			var alertResult = await ViewService.DisplayAlert(
				string.Empty,
				string.Format(
					AppResources.QuestionReserveBike,
					SelectedBike.GetFullDisplayName(),
					SelectedBike.TariffDescription?.MaxReservationTimeSpan.TotalMinutes ?? 0),
				AppResources.MessageAnswerYes,
				AppResources.MessageAnswerNo);

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

			// Lock list to avoid multiple taps while copri action is pending.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;

			// Stop polling before requesting bike.
			await ViewUpdateManager().StopAsync();

			BikesViewModel.ActionText = AppResources.ActivityTextReservingBike;
			IsConnected = IsConnectedDelegate();

			// reserve bike
			try
			{
				await ConnectorFactory(IsConnected).Command.DoReserve(SelectedBike);
				Log.ForContext<DisposableDisconnected>().Information("User reserved bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				Log.ForContext<DisposableDisconnected>().Information("Request to reserve bike {bikeId} declined.", SelectedBike.Id);
				if (exception is BookingDeclinedException)
				{
					// Too many bikes booked.
					Log.ForContext<DisposableDisconnected>().Error("Maximum count of bikes {exception.MaxBikesCount} already requested/ booked.", (exception as BookingDeclinedException).MaxBikesCount);

					await ViewService.DisplayAlert(
						AppResources.MessageHintTitle,
						string.Format(AppResources.ErrorReservingBikeTooManyReservationsRentals, SelectedBike.Id, (exception as BookingDeclinedException).MaxBikesCount),
						AppResources.MessageAnswerOk);
				}
				else if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<DisposableDisconnected>().Error("Copri server not reachable.");

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

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

				// Restart polling again.
				BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
				await ViewUpdateManager().StartAsync();
				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true;
				return this;
			}

			// Search for lock.
			LockInfoTdo result = null;
			BikesViewModel.ActionText = AppResources.ActivityTextSearchingLock;
			try
			{
				result = await LockService.ConnectAsync(
					new LockInfoAuthTdo.Builder { Id = SelectedBike.LockInfo.Id, Guid = SelectedBike.LockInfo.Guid, K_seed = SelectedBike.LockInfo.Seed, K_u = SelectedBike.LockInfo.UserKey }.Build(),
					LockService.TimeOut.GetSingleConnect(1));
				Log.ForContext<DisposableDisconnected>().Information("Connected to lock of bike {bikeId} successfully. Value is {lockState}.", SelectedBike.Id, SelectedBike.LockInfo.State);
			}
			catch (Exception exception)
			{
				Log.ForContext<DisposableDisconnected>().Information("Connection to lock of bike {bikeId} failed.");

				// Do not display any messages here, because search is implicit.
				if (exception is OutOfReachException)
				{
					Log.ForContext<DisposableDisconnected>().Error("Lock is out of reach.");
					BikesViewModel.ActionText = AppResources.ActivityTextLockIsOutOfReach;
				}
				else
				{
					Log.ForContext<DisposableDisconnected>().Error("{@exception}", exception);
					BikesViewModel.ActionText = AppResources.ActivityTextLockNotFound;
				}

				// Restart polling again.
				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);
			}

			// get current locking state
			SelectedBike.LockInfo.State = result?.State?.GetLockingState() ?? LockingState.UnknownDisconnected;
			if (SelectedBike.LockInfo.State == LockingState.UnknownDisconnected)
			{
				// Do not display any messages here, because search is implicit.
				Log.ForContext<DisposableDisconnected>().Error("Lock is still not connected.");

				// Restart polling again.
				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);
			}
			SelectedBike.LockInfo.Guid = result?.Guid ?? new Guid();

			// Ask whether to really book bike?
			alertResult = SelectedBike.LockInfo.State != LockingState.Open
				? await ViewService.DisplayAlert(
					string.Empty,
					string.Format(AppResources.QuestionOpenLockAndBookBike, SelectedBike.GetFullDisplayName()),
					AppResources.MessageAnswerYes,
					AppResources.MessageAnswerNo)
				: await ViewService.DisplayAlert(
					string.Empty,
					string.Format(AppResources.QuestionBookBike, SelectedBike.GetFullDisplayName()),
					AppResources.MessageAnswerYes,
					AppResources.MessageAnswerNo);

			if (alertResult == false)
			{
				// User aborted booking process
				Log.ForContext<DisposableDisconnected>().Information("User request to not book reserved bike {bikeId}.", SelectedBike.Id);

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

				// Restart polling again.
				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);
			}

			Log.ForContext<DisposableDisconnected>().Information("User request to book reserved bike {bikeId}.", SelectedBike.Id);

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

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

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

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

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

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

						await ViewService.DisplayAlert(
							AppResources.ErrorOpenLockTitle,
							AppResources.ErrorOpenLockStillClosed,
							AppResources.MessageAnswerOk);
					}
					else
					{
						Log.ForContext<DisposableDisconnected>().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<DisposableDisconnected>().Information("Battery state of lock from {bikeId} read successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<DisposableDisconnected>().Information("Battery state of lock from {bikeId} can not be read.", SelectedBike.Id);
				if (exception is OutOfReachException)
				{
					Log.ForContext<DisposableDisconnected>().Debug("Lock is out of reach");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
				}
				else
				{
					Log.ForContext<DisposableDisconnected>().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<DisposableDisconnected>().Information("Backend updated for bike {bikeId} successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				Log.ForContext<DisposableDisconnected>().Information("Updating backend for bike {bikeId} failed.", SelectedBike.Id);
				if (exception is WebConnectFailureException)
				{
					// No web.
					Log.ForContext<DisposableDisconnected>().Debug("Copri server not reachable. No web.");
					BikesViewModel.ActionText = AppResources.ActivityTextErrorNoWebUpdateingLockstate;
				}
				else if (exception is ResponseException copriException)
				{
					// Copri exception.
					Log.ForContext<DisposableDisconnected>().Debug("{response}", copriException.Response);
					BikesViewModel.ActionText = AppResources.ActivityTextErrorStatusUpdateingLockstate;
				}
				else
				{
					Log.ForContext<DisposableDisconnected>().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> Request is not supported, button should be disabled. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> UnsupportedRequest()
		{
			Log.ForContext<DisposableDisconnected>().Error("Click of unsupported button click detected.");
			return await Task.FromResult<IRequestHandler>(this);
		}
	}
}