using System;
using System.Collections.Generic;
using System.Threading;
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.Geolocation;
using TINK.View;
using static TINK.Model.Bikes.BikeInfoNS.BluetoothLock.Command.CloseCommand;
using static TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandlerFactory;


namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	public class ReservedUnknown : 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 ReservedUnknown(
		   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.ActionOpenLockAndRentBike, // Open Lock & Rent Bike             
			   true, // Show button "Open Lock & Rent Bike.
			   isConnectedDelegate,
			   connectorFactory,
			   geolocation,
			   lockService,
			   viewUpdateManager,
			   smartDevice,
			   viewService,
			   bikesViewModel,
			   activeUser)
		{
			LockitButtonText = AppResources.ActionCloseLock; // Close Lock
			IsLockitButtonVisible = true; // Show button to enable opening lock in case user took a pause and does not want to return the bike.

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

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

		/// <summary> Open bike and update COPRI lock state. </summary>
		public async Task<IRequestHandler> HandleRequestOption1() => await OpenLock();

		/// <summary> Close lock (and return bike).</summary>
		public async Task<IRequestHandler> HandleRequestOption2()
		{
			await _closeLockActionViewModel.CloseLockAsync();
			return Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, GeolocationService, LockService, ViewUpdateManager, SmartDevice, ViewService, BikesViewModel, ActiveUser);
		}

		/// <summary> Open bike and update COPRI lock state. </summary>
		public async Task<IRequestHandler> OpenLock()
		{
			Log.ForContext<ReservedUnknown>().Information("User request to unlock bike {bikeId}.", SelectedBike.Id);

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

			// open lock
			BikesViewModel.ActionText = AppResources.ActivityTextOpeningLock;
			ILockService btLock = LockService[SelectedBike.LockInfo.Id];
			try
			{
				SelectedBike.LockInfo.State = (await btLock.OpenAsync())?.GetLockingState() ?? LockingState.UnknownDisconnected;
				Log.ForContext<ReservedUnknown>().Information("Lock from {bikeId} opened successfully.", SelectedBike.Id);
			}
			catch (Exception exception)
			{
				BikesViewModel.ActionText = string.Empty;
				Log.ForContext<ReservedUnknown>().Information("Lock from {bikeId} can not be opened.", SelectedBike.Id);
				if (exception is OutOfReachException)
				{
					Log.ForContext<ReservedUnknown>().Debug("Lock is out of reach.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorLockOutOfReach,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenBoldIsBlockedException)
				{
					Log.ForContext<ReservedUnknown>().Debug("Bold is blocked.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockBoldBlocked,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenBoldStatusIsUnknownException)
				{
					Log.ForContext<ReservedUnknown>().Debug("Lock reports that state is still unknown.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockStatusUnknown,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else if (exception is CouldntOpenInconsistentStateExecption inconsistentState
						&& inconsistentState.State == LockingState.Closed)
				{
					Log.ForContext<ReservedUnknown>().Debug("Lock reports that it is closed.");

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						AppResources.ErrorOpenLockStillClosed,
						AppResources.ErrorOpenLockBikeAlreadyBooked,
						AppResources.MessageAnswerOk);
				}
				else
				{
					Log.ForContext<ReservedUnknown>().Debug("{@exception}", exception);

					await ViewService.DisplayAdvancedAlert(
						AppResources.ErrorOpenLockTitle,
						exception.Message,
						AppResources.ErrorTryAgain,
						AppResources.MessageAnswerOk);
				}

				// When bold is blocked lock is still closed even if exception occurs.
				// In all other cases state is supposed to be unknown. Example: Lock is out of reach and no more bluetooth connected.
				SelectedBike.LockInfo.State = exception is StateAwareException stateAwareException
					? stateAwareException.State
					: LockingState.UnknownDisconnected;

			}

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

			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);
		}

		/// <summary>
		/// Processes the close lock progress.
		/// </summary>
		/// <remarks>
		/// Only used for testing.
		/// </remarks>
		/// <param name="step">Current step to process.</param>
		public void ReportStep(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(State state, string details) => await _closeLockActionViewModel.ReportStateAsync(state, details);
	}
}