using System;
using System.Threading.Tasks;
using Serilog;
using ShareeBike.Model.Bikes.BikeInfoNS.CopriLock;
using ShareeBike.Model.Connector;
using ShareeBike.Model.Device;
using ShareeBike.Model.State;
using ShareeBike.Model.User;
using ShareeBike.MultilingualResources;
using ShareeBike.Repository.Exception;
using ShareeBike.Services.CopriApi.Exception;
using ShareeBike.View;

namespace ShareeBike.ViewModel.Bikes.Bike.CopriLock.RequestHandler
{
	using IRequestHandler = BluetoothLock.IRequestHandler;

	public class DisposableClosed : 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 DisposableClosed(
		   IBikeInfoMutable selectedBike,
		   Func<bool> isConnectedDelegate,
		   Func<bool, IConnector> connectorFactory,
		   Func<IPollingUpdateTaskManager> viewUpdateManager,
		   ISmartDevice smartDevice,
		   IViewService viewService,
		   IBikesViewModel bikesViewModel,
		   IUser activeUser) : base(
			   selectedBike,
			   AppResources.ActionOpenLockAndRentBike, // Button text: "Miete starten & Schloss öffnen"
			   true, // Show copri button to enable booking and opening
			   isConnectedDelegate,
			   connectorFactory,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = AppResources.ActionRequestBike; // Copri text: "Reservieren / Mieten"
			IsLockitButtonVisible = true;
		}

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

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

		/// <summary>Book bike and open lock.</summary>
		public async Task<IRequestHandler> BookAndRelease()
		{
			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<DisposableClosed>().Information("User selected bike {bike} in order to book and release bike from station but action was canceled.", SelectedBike);

				BikesViewModel.IsIdle = true;
				return this;
			}

			// Book and release bike from station.
			Log.ForContext<DisposableClosed>().Information("User selected bike {bike} in order to book and release bike from station.", SelectedBike);

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

			// Book bike prior to opening lock.
			BikesViewModel.ActionText = AppResources.ActivityTextRentingBike;
			IsConnected = IsConnectedDelegate();
			try
			{
				await ConnectorFactory(IsConnected).Command.BookAndOpenAync(SelectedBike);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

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

					await ViewService.DisplayAlert(
						AppResources.ErrorNoConnectionTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<DisposableClosed>().Error("User selected bike {id} but booking failed. {@exception}", SelectedBike.Id, 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, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

			Log.ForContext<DisposableClosed>().Information("User booked and released bike {bike} successfully.", SelectedBike);
			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, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}

		/// <summary>Reserve bike.</summary>
		public async Task<IRequestHandler> Reserve()
		{
			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<DisposableClosed>().Information("User selected centered bike {bike} in order to reserve but action was canceled.", SelectedBike);
				BikesViewModel.IsIdle = true;
				return this;
			}

			Log.ForContext<DisposableClosed>().Information("Request to reserve for bike {bike} detected.", SelectedBike);
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;

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

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

			try
			{
				await ConnectorFactory(IsConnected).Command.DoReserve(SelectedBike);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

				if (exception is BookingDeclinedException)
				{
					// Too many bikes booked.
					Log.ForContext<DisposableClosed>().Information("Request declined because maximum count of bikes {l_oException.MaxBikesCount} already requested/ booked.", (exception as BookingDeclinedException).MaxBikesCount);

					await ViewService.DisplayAlert(
						AppResources.MessageHintTitle,
						string.Format(AppResources.ErrorReservingBikeTooManyReservationsRentals, SelectedBike.GetFullDisplayName(), (exception as BookingDeclinedException).MaxBikesCount),
						AppResources.MessageAnswerOk);
				}
				else if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<DisposableClosed>().Information("User selected centered bike {bike} but reserving failed (Copri server not reachable).", SelectedBike);

					await ViewService.DisplayAlert(
						AppResources.ErrorNoConnectionTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<DisposableClosed>().Error("User selected centered bike {bike} but reserving failed. {@exception}", SelectedBike, exception);

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

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

			Log.ForContext<DisposableClosed>().Information("User reserved bike {bike} successfully.", SelectedBike);
			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, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}
	}
}