using System;
using System.Threading.Tasks;
using TINK.Model.Connector;
using TINK.Model;
using TINK.MultilingualResources;
using TINK.Repository.Exception;
using TINK.Repository.Request;
using TINK.View;
using static TINK.Model.Bikes.BikeInfoNS.BluetoothLock.Command.GetLockedLocationCommand;
using Serilog;
using TINK.Services.BluetoothLock;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock
{
	/// <summary>
	/// Return bike action.
	/// </summary>
	/// <typeparam name="T">Type of owner.</typeparam>
	public class EndRentalActionViewModel<T> : IGetLockedLocationCommandListener
	{
		/// <summary>
		/// View model to be used for progress report and unlocking/ locking view.
		/// </summary>
		private IBikesViewModel BikesViewModel { get; set; }

		/// <summary>
		/// View service to show modal notifications.
		/// </summary>
		private IViewService ViewService { get; }

		/// <summary>Object to start or stop update of view model objects from Copri.</summary>
		private Func<IPollingUpdateTaskManager> ViewUpdateManager { get; }

		/// <summary> Bike close. </summary>
		private Model.Bikes.BikeInfoNS.BluetoothLock.IBikeInfoMutable SelectedBike { get; }

		/// <summary>
		/// Service to control locks.
		/// </summary>
		private ILocksService LockService { get; }

		/// <summary> Provides a connector object.</summary>
		protected Func<bool, IConnector> ConnectorFactory { get; }

		/// <summary> Delegate to retrieve connected state. </summary>
		private Func<bool> IsConnectedDelegate { get; }

		/// <summary>Gets the is connected state. </summary>
		bool IsConnected;

		/// <summary>
		/// Constructs the object.
		/// </summary>
		/// <param name="selectedBike">Bike to close.</param>
		/// <param name="viewUpdateManager">Object to start or stop update of view model objects from Copri.</param>
		/// <param name="viewService">View service to show modal notifications.</param>
		/// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
		/// <exception cref="ArgumentException"></exception>
		public EndRentalActionViewModel(
			Model.Bikes.BikeInfoNS.BluetoothLock.IBikeInfoMutable selectedBike,
			Func<bool> isConnectedDelegate,
			Func<bool, IConnector> connectorFactory,
			ILocksService lockService,
			Func<IPollingUpdateTaskManager> viewUpdateManager,
			IViewService viewService,
			IBikesViewModel bikesViewModel)
		{
			SelectedBike = selectedBike;
			IsConnectedDelegate = isConnectedDelegate;
			ConnectorFactory = connectorFactory;
			LockService = lockService
				?? throw new ArgumentException($"Can not construct {typeof(EndRentalActionViewModel<T>)}-object. Parameter {nameof(lockService)} must not be null.");
			ViewUpdateManager = viewUpdateManager;
			ViewService = viewService;
			BikesViewModel = bikesViewModel
				?? throw new ArgumentException($"Can not construct {typeof(EndRentalActionViewModel<T>)}-object. {nameof(bikesViewModel)} must not be null.");

			// Set parameter for RentalProcess View to initial value.
			BikesViewModel.StartRentalProcess(new RentalProcessViewModel(SelectedBike.Id)
			{
				State = CurrentRentalProcess.None,
				StepIndex = 0,
				Result = CurrentStepStatus.None
			});
		}

		/// <summary>
		/// Processes the get lock location progress.
		/// </summary>
		/// <param name="step">Current step to process.</param>
		public void ReportStep(Step step)
		{
			switch (step)
			{
				case Step.StartingQueryLocation:
					// 1.Step: Geolocation data
					BikesViewModel.RentalProcess.StepInfoText = AppResources.MarkingRentalProcessEndRentalStepGPS;
					BikesViewModel.ActionText = AppResources.ActivityTextQueryLocation;
					break;

				case Step.DisconnectingLockOnDisconnectedNoLocationError:
					BikesViewModel.ActionText = AppResources.ActivityTextDisconnectingLock;
					break;
			}
		}

		/// <summary>
		/// Processes the get lock location state.
		/// </summary>
		/// <param name="state">State to process.</param>
		/// <param name="details">Textual details describing current state.</param>
		public async Task ReportStateAsync(State state, string details)
		{
			switch (state)
			{
				case State.DisconnetedNoLocationError:
					BikesViewModel.RentalProcess.Result = CurrentStepStatus.Failed;
					await ViewService.DisplayAlert(
						AppResources.ErrorEndRentalTitle,
						AppResources.ErrorEndRentalNotAtSuitableStation,
						AppResources.MessageAnswerOk);
					break;

				case State.DisconnectError:
					BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
					break;

				case State.QueryLocationSucceeded:
					BikesViewModel.RentalProcess.Result = CurrentStepStatus.Succeeded;
					break;

				case State.QueryLocationFailed:
					BikesViewModel.RentalProcess.Result = CurrentStepStatus.Failed;

					await ViewService.DisplayAlert(
						AppResources.ErrorEndRentalTitle,
						AppResources.ErrorNoLocationPermission,
						AppResources.MessageAnswerOk);

					break;
			}
		}

		/// <summary> Return bike. </summary>
		public async Task EndRentalAsync()
		{
			Log.ForContext<T>().Information("User requests to return bike {bike}.", SelectedBike);

			// lock GUI
			BikesViewModel.IsIdle = false;

			// Stop Updater
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopAsync();

			// 1. Step
			// Parameter for RentalProcess View
			BikesViewModel.StartRentalProcess(new RentalProcessViewModel(SelectedBike.Id)
			{
				State = CurrentRentalProcess.EndRental,
				StepIndex = 1,
				Result = CurrentStepStatus.None
			});

			// Get Location
			BikesViewModel.RentalProcess.StepInfoText = AppResources.MarkingRentalProcessEndRentalStepGPS;
			BikesViewModel.RentalProcess.ImportantStepInfoText = AppResources.MarkingRentalProcessEndRentalWait;

			LocationDto currentLocationDto = null;
			try
			{
				currentLocationDto = await SelectedBike.GetLockedBikeLocationAsync(this);
			}
			catch (Exception)
			{
				BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
				await ViewUpdateManager().StartAsync();

				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true;
				BikesViewModel.RentalProcess.State = CurrentRentalProcess.None;
				return;
			}

			// Send end of rental to backend
			IsConnected = IsConnectedDelegate();

			BookingFinishedModel bookingFinished;
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			try
			{
				bookingFinished = await ConnectorFactory(IsConnected).Command.DoReturn(
					SelectedBike,
					currentLocationDto);
			}
			catch (Exception exception)
			{
				BikesViewModel.RentalProcess.Result = CurrentStepStatus.Failed;
				BikesViewModel.ActionText = string.Empty;

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

					await ViewService.DisplayAlert(
						AppResources.ErrorEndRentalTitle,
						AppResources.ErrorNoWeb,
						AppResources.MessageAnswerOk);
				}
				else if (exception is NotAtStationException notAtStationException)
				{
					// COPRI returned an error.
					Log.ForContext<T>().Information(
							"User selected booked bike {bike} but returning failed. COPRI returned out of GEO fencing error. Position send to COPRI {@position}.",
							SelectedBike,
							currentLocationDto);

					await ViewService.DisplayAlert(
						AppResources.ErrorEndRentalTitle,
						string.Format(AppResources.ErrorEndRentalNotAtStation, notAtStationException.StationNr, notAtStationException.Distance),
						AppResources.MessageAnswerOk);
				}
				else if (exception is NoGPSDataException)
				{
					// COPRI returned an error.
					Log.ForContext<T>().Information("User selected booked bike {bike} but returning failed. COPRI returned an no GPS- data error.", SelectedBike);

					await ViewService.DisplayAlert(
						AppResources.ErrorEndRentalTitle,
						string.Format(AppResources.ErrorEndRentalUnknownLocation),
						AppResources.MessageAnswerOk);
				}
				else if (exception is ResponseException copriException)
				{
					// COPRI returned an error.
					Log.ForContext<T>().Information("User selected booked bike {bike} but returning failed. COPRI returned an error.", SelectedBike);

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorEndRentalTitle,
						copriException.Message,
						copriException.Response,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<T>().Error("User selected booked bike {bike} but returning failed. {@l_oException}", SelectedBike.Id, exception);

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

				await ViewUpdateManager().StartAsync();
				BikesViewModel.ActionText = string.Empty;
				BikesViewModel.IsIdle = true;
				BikesViewModel.RentalProcess.State = CurrentRentalProcess.None;
				return;
			}

			BikesViewModel.RentalProcess.Result = CurrentStepStatus.Succeeded;

			// 2.Step: User feedback on bike condition

#if !USERFEEDBACKDLG_OFF

			BikesViewModel.RentalProcess.StepIndex = 2;
			BikesViewModel.RentalProcess.Result = CurrentStepStatus.None;
			BikesViewModel.RentalProcess.StepInfoText = AppResources.MarkingRentalProcessEndRentalStepFeedback;
			BikesViewModel.RentalProcess.ImportantStepInfoText = String.Empty;

			var feedBackUri = SelectedBike?.OperatorUri;
			var battery = SelectedBike.Drive?.Battery;
			var feedback = await ViewService.DisplayUserFeedbackPopup(
				battery,
				bookingFinished?.Co2Saving);

			if (battery != null
				&& feedback.CurrentChargeBars != null)
			{
				SelectedBike.Drive.Battery.CurrentChargeBars = feedback.CurrentChargeBars;
			}
#endif
			BikesViewModel.RentalProcess.Result = CurrentStepStatus.Succeeded;

			// 3.Step

			// Send user feedback to backend
			BikesViewModel.RentalProcess.StepIndex = 3;
			BikesViewModel.RentalProcess.Result = CurrentStepStatus.None;
			BikesViewModel.RentalProcess.StepInfoText = AppResources.MarkingRentalProcessEndRentalStepUpload;
			BikesViewModel.RentalProcess.ImportantStepInfoText = AppResources.MarkingRentalProcessEndRentalWait;

			IsConnected = IsConnectedDelegate();
#if !USERFEEDBACKDLG_OFF
			try
			{
				await ConnectorFactory(IsConnected).Command.DoSubmitFeedback(
					 new UserFeedbackDto
					 {
						 BikeId = SelectedBike.Id,
						 CurrentChargeBars = feedback.CurrentChargeBars,
						 IsBikeBroken = feedback.IsBikeBroken,
						 Message = feedback.Message
					 },
					feedBackUri);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

				if (exception is ResponseException copriException)
				{
					// Copri server is not reachable.
					Log.ForContext<T>().Information("Submitting feedback for bike {bike} failed. COPRI returned an error.", SelectedBike);
				}
				else
				{
					Log.ForContext<T>().Error("Submitting feedback for bike {bike} failed. {@l_oException}", SelectedBike.Id, exception);
				}

				await ViewService.DisplayAlert(
					AppResources.ErrorSubmitFeedbackTitle,
					AppResources.ErrorSubmitFeedback,
					AppResources.MessageAnswerOk);
			}
#endif
			BikesViewModel.RentalProcess.Result = CurrentStepStatus.Succeeded;

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

			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
			await ViewUpdateManager().StartAsync();
			BikesViewModel.ActionText = string.Empty;

			// Confirmation message that rental is ended
			Log.ForContext<T>().Information("User returned bike {bike} successfully.", SelectedBike);

			await ViewService.DisplayAlert(
				String.Format(AppResources.MessageRentalProcessEndRentalFinishedTitle, SelectedBike.Id),
				String.Format(
					"{0}{1}",
						!string.IsNullOrWhiteSpace(bookingFinished?.Co2Saving) ?
							$"{bookingFinished?.Co2Saving}\r\n\r\n"
							: string.Empty,
						String.Format(AppResources.MessageRentalProcessEndRentalFinishedText)
				),
				AppResources.MessageAnswerOk
			);

			// Mini survey
			if (bookingFinished != null && bookingFinished.MiniSurvey.Questions.Count > 0)
			{
				await ViewService.PushModalAsync(ViewTypes.MiniSurvey);
			}

			BikesViewModel.RentalProcess.State = CurrentRentalProcess.None;
			BikesViewModel.IsIdle = true;

			return;
		}
	}
}