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 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,
		   IGeolocationService 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; // Search Lock
			IsLockitButtonVisible = true; // show button "Search Lock"
		}

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

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

		/// <summary> Request 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("User request to connect to lock of bike {bikeId}.", SelectedBike.Id);

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

			BikesViewModel.ActionText = AppResources.ActivityTextQuerryServer;
			IsConnected = IsConnectedDelegate();
			try
			{
				// Repeat booking to get a new seed/ k_user value.
				await ConnectorFactory(IsConnected).Command.CalculateAuthKeys(SelectedBike);
				Log.ForContext<BookedDisconnected>().Information("Calculation of AuthKeys successfully.");
			}
			catch (Exception exception)
			{
				Log.ForContext<BookedDisconnected>().Information("Calculation of AuthKeys failed.");
				BikesViewModel.ActionText = string.Empty;

				if (exception is WebConnectFailureException
					|| exception is RequestNotCachableException)
				{
					// Copri server is not reachable.
					Log.ForContext<BookedDisconnected>().Error("Copri server not reachable.");

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

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

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

			// Reconnect to lock
			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));
					Log.ForContext<BookedDisconnected>().Information("Connected to lock of bike {bikeId} successfully. Value is {lockState}.", SelectedBike.Id, SelectedBike.LockInfo.State);
				}
				catch (Exception exception)
				{
					Log.ForContext<BookedDisconnected>().Information("Connection to lock of bike {bikeId} failed. ", SelectedBike.Id);
					BikesViewModel.ActionText = string.Empty;
					if (exception is ConnectBluetoothNotOnException)
					{
						continueConnect = false;
						Log.ForContext<BookedDisconnected>().Error("Bluetooth not on.");
						await ViewService.DisplayAlert(
							AppResources.ErrorConnectLockTitle,
							AppResources.ErrorLockBluetoothNotOn,
							AppResources.MessageAnswerOk);
					}
					else if (exception is ConnectLocationPermissionMissingException)
					{
						continueConnect = false;
						Log.ForContext<BookedDisconnected>().Error("Location permission missing.");
						await ViewService.DisplayAlert(
							AppResources.ErrorConnectLockTitle,
							AppResources.ErrorNoLocationPermission,
							AppResources.MessageAnswerOk);
					}
					else if (exception is ConnectLocationOffException)
					{
						continueConnect = false;
						Log.ForContext<BookedDisconnected>().Error("Location services not on.");
						await ViewService.DisplayAlert(
							AppResources.ErrorConnectLockTitle,
							AppResources.ErrorLockLocationOff,
							AppResources.MessageAnswerOk);
					}
					else if (exception is OutOfReachException)
					{
						continueConnect = false;
						Log.ForContext<BookedDisconnected>().Error("Lock is out of reach.");
						await ViewService.DisplayAlert(
							AppResources.ErrorConnectLockTitle,
							AppResources.ErrorLockOutOfReach,
							AppResources.MessageAnswerOk);
					}
					else
					{
						Log.ForContext<BookedDisconnected>().Error("{@exception}", exception);

						string message;
						if (retryCount < 2)
						{
							message = AppResources.ErrorConnectLock;
						}
						else if (retryCount < 3)
						{
							message = AppResources.ErrorConnectLockEscalationLevel1;
						}
						else
						{
							message = AppResources.ErrorConnectLockEscalationLevel2;
						}


						continueConnect = await ViewService.DisplayAdvancedAlert(
								AppResources.ErrorConnectLockTitle,
								message,
								string.Empty,
								AppResources.MessageAnswerRetry,
								AppResources.MessageAnswerCancel);
					}

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

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

			if (!(result?.State is LockitLockingState lockingState))
			{
				Log.ForContext<BookedDisconnected>().Error("Locking state of bike {bikeId} not found.", SelectedBike.Id);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					AppResources.ErrorConnectLockTitle,
					AppResources.ErrorLockNoStatus,
					AppResources.MessageAnswerOk);

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

			// get current locking state
			var state = lockingState.GetLockingState();
			SelectedBike.LockInfo.State = state;
			SelectedBike.LockInfo.Guid = result?.Guid ?? new Guid();

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

			// 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);
		}
	}
}