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.Geolocation;
using TINK.View;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	public class BookedDisconnected : 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 BookedDisconnected(
		   IBikeInfoMutable selectedBike,
		   Func<bool> isConnectedDelegate,
		   Func<bool, IConnector> connectorFactory,
		   IGeolocation geolocation,
		   ILocksService lockService,
		   Func<IPollingUpdateTaskManager> viewUpdateManager,
		   ISmartDevice smartDevice,
		   IViewService viewService,
		   IBikesViewModel bikesViewModel,
		   IUser activeUser) :
			base(
			   selectedBike,
			   nameof(BookedDisconnected),
			   false,
			   isConnectedDelegate,
			   connectorFactory,
			   geolocation,
			   lockService,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = AppResources.ActionSearchLock;
			IsLockitButtonVisible = true;
		}

		public async Task<IRequestHandler> HandleRequestOption1() => await UnsupportedRequest();

		/// <summary> Scan for lock.</summary>
		/// <returns></returns>
		public async Task<IRequestHandler> HandleRequestOption2() => await ConnectLock();

		/// <summary> Requst is not supported, button should be disabled. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> UnsupportedRequest()
		{
			Log.ForContext<BookedDisconnected>().Error("Click of unsupported button click detected.");
			return await Task.FromResult<IRequestHandler>(this);
		}

		/// <summary> Scan for lock.</summary>
		/// <returns></returns>
		public async Task<IRequestHandler> ConnectLock()
		{
			// Lock list to avoid multiple taps while copri action is pending.
			BikesViewModel.IsIdle = false;
			Log.ForContext<BookedDisconnected>().Information("Request to search {bike} detected.", SelectedBike);

			// Stop polling before getting new auth-values.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopUpdatePeridically();

			BikesViewModel.ActionText = AppResources.ActivityTextQuerryServer;
			IsConnected = IsConnectedDelegate();
			try
			{
				// Repeat booking to get a new seed/ k_user value.
				await ConnectorFactory(IsConnected).Command.CalculateAuthKeys(SelectedBike);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;

				if (exception is WebConnectFailureException)
				{
					// Copri server is not reachable.
					Log.ForContext<BookedDisconnected>().Information("User selected booked bike {l_oId} to connect to lock. (Copri server not reachable).", SelectedBike.Id);

					await ViewService.DisplayAlert(
						AppResources.MessageConnectLockErrorTitle,
						$"{AppResources.ErrorConnectLockRentedBikeNoWebMessage}\r\n{exception.Message}\r\n{WebConnectFailureException.GetHintToPossibleExceptionsReasons}",
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<BookedDisconnected>().Error("User selected booked bike {l_oId} to connect to lock. {@l_oException}", SelectedBike.Id, exception);

					await ViewService.DisplayAlert(
						AppResources.MessageConnectLockErrorTitle,
						$"{AppResources.ErrorConnectLockGeneralErrorMessage}\r\n{exception.Message}",
						AppResources.MessageAnswerOk);
				}

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

			LockInfoTdo result = null;
			var continueConnect = true;
			var retryCount = 1;
			while (continueConnect && 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(retryCount));
				}
				catch (Exception exception)
				{

					BikesViewModel.ActionText = string.Empty;
					if (exception is ConnectBluetoothNotOnException)
					{
						continueConnect = false;

						await ViewService.DisplayAlert(
							AppResources.MessageConnectLockErrorTitle,
							AppResources.ErrorFindLockBluetoothNotOn,
							AppResources.MessageAnswerOk);
					}
					else if (exception is ConnectLocationPermissionMissingException)
					{
						continueConnect = false;

						await ViewService.DisplayAlert(
							AppResources.MessageConnectLockErrorTitle,
							AppResources.ErrorFindLockLocationPermissionMissing,
							AppResources.MessageAnswerOk);
					}
					else if (exception is ConnectLocationOffException)
					{
						continueConnect = false;

						await ViewService.DisplayAlert(
							AppResources.MessageConnectLockErrorTitle,
							AppResources.ErrorFindLockLocationOff,
							AppResources.MessageAnswerOk);
					}
					else if (exception is OutOfReachException)
					{
						Log.ForContext<BookedDisconnected>().Debug("Lock can not be found because out of reach. {Exception}", exception);

						continueConnect = await ViewService.DisplayAlert(
							AppResources.MessageConnectLockErrorTitle,
							AppResources.ErrorFindLockRentedBikeOutOfReachMessage,
							AppResources.MessageAnswerRetry,
							AppResources.MessageAnswerCancel);
					}
					else
					{
						Log.ForContext<BookedDisconnected>().Error("Lock can not be found. {Exception}", exception);

						string message;
						if (retryCount < 2)
						{
							message = AppResources.ErrorBookedSearchMessage;
						}
						else if (retryCount < 3)
						{
							message = AppResources.ErrorBookedSearchMessageEscalationLevel1;
						}
						else
						{
							message = AppResources.ErrorBookedSearchMessageEscalationLevel2;
						}


						continueConnect = await ViewService.DisplayAdvancedAlert(
								AppResources.MessageConnectLockErrorTitle,
								message,
								"", // bool IsReportLevelVerbose ? exception.Message : string.Empty,  // or use ActiveUser.DebugLevel.HasFlag(Permissions.ReportLevel) instead?
								AppResources.MessageAnswerRetry,
								AppResources.MessageAnswerCancel);
					}

					if (continueConnect)
					{
						retryCount++;
						continue;
					}

					// Quit and restart polling again.
					BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
					await ViewUpdateManager().StartUpdateAyncPeridically();
					BikesViewModel.ActionText = string.Empty;
					BikesViewModel.IsIdle = true;
					return this;
				}
			}

			if (result?.State == null)
			{
				Log.ForContext<BookedDisconnected>().Information("Lock for bike {bike} not found.", SelectedBike);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					AppResources.MessageConnectLockErrorTitle,
					$"Schlossstatus des gemieteten Rads konnte nicht ermittelt werden.",
					AppResources.MessageAnswerOk);

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

			var state = result.State.Value.GetLockingState();
			SelectedBike.LockInfo.State = state;
			SelectedBike.LockInfo.Guid = result?.Guid ?? new Guid();

			Log.ForContext<BookedDisconnected>().Information($"State for bike {SelectedBike.Id} updated successfully. Value is {SelectedBike.LockInfo.State}.");

			// Restart polling again.
			BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
			await ViewUpdateManager().StartUpdateAyncPeridically();
			BikesViewModel.ActionText = string.Empty;
			BikesViewModel.IsIdle = true;
			return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}
	}
}