using System;
using System.Threading.Tasks;
using Serilog;
using ShareeBike.Model.Bikes.BikeInfoNS.BluetoothLock;
using ShareeBike.Model.Connector;
using ShareeBike.Model.Device;
using ShareeBike.Model.User;
using ShareeBike.MultilingualResources;
using ShareeBike.Services.BluetoothLock;
using ShareeBike.Services.Geolocation;
using ShareeBike.View;
using CloseCommand = ShareeBike.Model.Bikes.BikeInfoNS.BluetoothLock.Command.CloseCommand;
using static ShareeBike.ViewModel.Bikes.Bike.BluetoothLock.RequestHandlerFactory;
using ShareeBike.Services.BluetoothLock.Exception;

namespace ShareeBike.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	public class BookedOpen : Base, IRequestHandler, CloseCommand.ICloseCommandListener
	{
		/// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
		public BookedOpen(
		   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.ActionCloseLock,  // Close Lock
			   true, // Show button
			   isConnectedDelegate,
			   connectorFactory,
			   geolocation,
			   lockService,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = activeUser.DebugLevel.HasFlag(Model.User.Account.Permissions.ManageAlarmAndSounds) ? AppResources.ActionLockSettings : GetType().Name;
			IsLockitButtonVisible = activeUser.DebugLevel.HasFlag(Model.User.Account.Permissions.ManageAlarmAndSounds);

			_closeLockActionViewModel = new CloseLockActionViewModel<BookedOpen>(
				selectedBike,
				viewUpdateManager,
				viewService,
				bikesViewModel);
		}

		/// <summary>
		/// Holds the view model for close action.
		/// </summary>
		private readonly CloseLockActionViewModel<BookedOpen> _closeLockActionViewModel;

		/// <summary>
		/// Processes the close lock progress.
		/// </summary>
		/// <remarks>
		/// Only used for testing.
		/// </remarks>
		/// <param name="step">Current step to process.</param>
		public void ReportStep(CloseCommand.Step step) => _closeLockActionViewModel?.ReportStep(step);

		/// <summary>
		/// Processes the close lock state.
		/// </summary>
		/// <remarks>
		/// Only used for testing.
		/// </remarks>
		/// <param name="state">State to process.</param>
		/// <param name="details">Textual details describing current state.</param>
		public async Task ReportStateAsync(CloseCommand.State state, string details) => await _closeLockActionViewModel.ReportStateAsync(state, details);


		/// <summary> Close lock (and return bike).</summary>
		public async Task<IRequestHandler> HandleRequestOption1()
		{
			await _closeLockActionViewModel.CloseLockAsync();
			if(_closeLockActionViewModel.IsEndRentalRequested == false)
			{
				return Create(
					SelectedBike,
					IsConnectedDelegate,
					ConnectorFactory,
					GeolocationService,
					LockService,
					ViewUpdateManager,
					SmartDevice,
					ViewService,
					BikesViewModel,
					ActiveUser);
			}

			var _endRentalActionViewModel = new EndRentalActionViewModel<BookedClosed>(
				SelectedBike,
				IsConnectedDelegate,
				ConnectorFactory,
				ViewUpdateManager,
				ViewService,
				BikesViewModel);

			await _endRentalActionViewModel.EndRentalAsync();

			return Create(
				SelectedBike,
				IsConnectedDelegate,
				ConnectorFactory,
				GeolocationService,
				LockService,
				ViewUpdateManager,
				SmartDevice,
				ViewService,
				BikesViewModel,
				ActiveUser);
		}

		public async Task<IRequestHandler> HandleRequestOption2()
		{
			if (ActiveUser.DebugLevel.HasFlag(Model.User.Account.Permissions.ManageAlarmAndSounds))
			{
				await ManageLockSettings();
			}
			else
			{
				throw new InvalidOperationException();
			}
			return Create(
				SelectedBike,
				IsConnectedDelegate,
				ConnectorFactory,
				GeolocationService,
				LockService,
				ViewUpdateManager,
				SmartDevice,
				ViewService,
				BikesViewModel,
				ActiveUser);
		}

		/// <summary> Manage sound/ alarm settings. </summary>
		/// <returns></returns>
		public async Task<IRequestHandler> ManageLockSettings()
		{
			// Stop polling before requesting bike.
			BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
			await ViewUpdateManager().StopAsync();

			// Go to lock settings
			Log.ForContext<ReservedOpen>().Information("User selected bike {bikeId} in order to manage sound/ alarm settings.", SelectedBike.Id);

			// Alarm settings
			var resultAlarm = await ViewService.DisplayAlert(
				"Alarm einstellen",
				"Alarm auf Einstellung 'niedrige Sensitivität' setzen oder Alarm ausschalten?",
				"Auf niedrige Sensitivität",
				"Alarm aus");

			try
			{
				if (resultAlarm == true)
				{
					// Lower alarm sensitivity.
					BikesViewModel.ActionText = "Setzen Alarm-Einstellungen...";
					await LockService[SelectedBike.LockInfo.Id].SetAlarmSettingsAsync(AlarmSettings.SmallSensivitySilent);
				}
				else
				{
					// Switch off alarm.
					BikesViewModel.ActionText = "Alarm ausschalten...";
					await LockService[SelectedBike.LockInfo.Id].SetIsAlarmOffAsync(true);
				}
			}
			catch (OutOfReachException exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Can not set alarm settings. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Setzen der Alarm-Einstellungen!",
					"Alarm kann erst eingestellt werden, wenn Rad in der Nähe ist.",
					AppResources.MessageAnswerOk);

				return this;
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Error("Can not set alarm settings. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Setzen der Alarms-Einstellungen!",
					exception.Message,
					AppResources.MessageAnswerOk);

				return this;
			}

			// Sound settings
			var resultSound = await ViewService.DisplayAlert(
				"Sounds einstellen",
				"Sounds auf Einstellung 'Warnung' setzen oder alle Sounds ausschalten?",
				"Auf Warnung",
				"Alles aus");

			try
			{
				if (resultSound == true)
				{
					BikesViewModel.ActionText = "Sounds einstellen auf 'Warnung'...";
					await LockService[SelectedBike.LockInfo.Id].SetSoundAsync(SoundSettings.Warn);
				}
				else
				{
					BikesViewModel.ActionText = "Alle Sounds ausschalten...";
					await LockService[SelectedBike.LockInfo.Id].SetSoundAsync(SoundSettings.AllOff);
				}
			}
			catch (OutOfReachException exception)
			{
				Log.ForContext<ReservedOpen>().Debug("Can not set sounds. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Einstellen der Sounds!",
					"Sounds können erst eingestellt werden, wenn Rad in der Nähe ist.",
					AppResources.MessageAnswerOk);

				return this;
			}
			catch (Exception exception)
			{
				Log.ForContext<ReservedOpen>().Error("Can not set sounds. {Exception}", exception);

				BikesViewModel.ActionText = string.Empty;
				await ViewService.DisplayAlert(
					"Fehler beim Einstellen der Sounds!",
					exception.Message,
					AppResources.MessageAnswerOk);

				return Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
			}

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

			return this;
		}

		/// <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);
		}
	}
}