using System;
using System.Threading.Tasks;
using TINK.Model.Connector;
using TINK.Model.Bike.BluetoothLock;
using TINK.Model.State;
using TINK.View;
using TINK.Model.Services.Geolocation;
using TINK.Services.BluetoothLock;
using Serilog;
using TINK.Model.Repository.Exception;
using TINK.Services.BluetoothLock.Exception;
using Xamarin.Essentials;
using TINK.MultilingualResources;
using TINK.Model.Bikes.Bike.BluetoothLock;
using TINK.Model.User;
using TINK.Model.Repository.Request;
using TINK.Repository.Exception;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    public class BookedOpen : Base, IRequestHandler
    {
        /// <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,
           IGeolocation geolocation,
           ILocksService lockService,
           Func<IPollingUpdateTaskManager> viewUpdateManager,
           IViewService viewService,
           IBikesViewModel bikesViewModel,
           IUser activeUser) : base(
               selectedBike, 
               AppResources.ActionCloseAndReturn,  // Copri button text: "Schloss schließen & Miete beenden"
               true, // Show button to allow user to return bike.
               isConnectedDelegate, 
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager, 
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = AppResources.ActionClose; // BT button text "Schließen".
            IsLockitButtonVisible = true; // Show button to allow user to lock bike.
        }

        /// <summary> Gets the bike state. </summary>
        public override InUseStateEnum State => InUseStateEnum.Disposable;

        /// <summary> Close lock and return bike.</summary>
        /// <returns></returns>
        public async Task<IRequestHandler> HandleRequestOption1()
        {
            // Ask whether to really return bike?
            BikesViewModel.IsIdle = false;
            var l_oResult = await ViewService.DisplayAlert(
                string.Empty,
                $"Fahrrad {SelectedBike.GetDisplayName()} abschließen und zurückgeben?",
                "Ja",
                "Nein");

            if (l_oResult == false)
            {
                // User aborted closing and returning bike process
                Log.ForContext<BookedOpen>().Information("User selected booked bike {l_oId} in order to close and return but action was canceled.", SelectedBike.Id);
                BikesViewModel.IsIdle = true;
                return this;
            }

            // Unlock bike.
            Log.ForContext<BookedOpen>().Information("Request to return bike {bike} detected.", SelectedBike);

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

            BikesViewModel.ActionText = AppResources.ActivityTextClosingLock;
            try
            {
                SelectedBike.LockInfo.State =  (await LockService[SelectedBike.LockInfo.Id].CloseAsync())?.GetLockingState() ?? LockingState.Disconnected;
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;

                if (exception is OutOfReachException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockOutOfReachMessage,
                        "OK");
                }
                else if (exception is CounldntCloseMovingException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockMovingMessage,
                        "OK");
                }
                else if (exception is CouldntCloseBoldBlockedException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockBoldBlockedMessage,
                        "OK");
                }
                else
                {
                    Log.ForContext<BookedOpen>().Error("Lock can not be closed. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        exception.Message,
                        "OK");
                }

                SelectedBike.LockInfo.State = exception is StateAwareException stateAwareException
                    ? stateAwareException.State
                    : LockingState.Disconnected;

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

                BikesViewModel.ActionText = string.Empty;
                BikesViewModel.IsIdle = true; // Unlock GUI                
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }
            
            if (SelectedBike.LockInfo.State != LockingState.Closed)
            {
                Log.ForContext<BookedOpen>().Error($"Lock can not be closed. Invalid locking state state {SelectedBike.LockInfo.State} detected.");

                BikesViewModel.ActionText = string.Empty;
                await ViewService.DisplayAlert(
                    AppResources.ErrorCloseLockTitle,
                    SelectedBike.LockInfo.State == LockingState.Open 
                        ? AppResources.ErrorCloseLockStillOpenMessage
                        : string.Format(AppResources.ErrorCloseLockUnexpectedStateMessage,  SelectedBike.LockInfo.State),
                    "OK");

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

                BikesViewModel.ActionText = string.Empty;
                BikesViewModel.IsIdle = true; // Unlock GUI                
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }

            // Get geoposition.
            var timeStamp = DateTime.Now;
            BikesViewModel.ActionText = "Abfrage Standort...";
            Location currentLocation;
            try
            {
                currentLocation = await Geolocation.GetAsync(timeStamp);
            }
            catch (Exception ex)
            {
                // No location information available.
                Log.ForContext<BookedOpen>().Information("Returning bike {Bike} is not possible. {Exception}", SelectedBike, ex);

                BikesViewModel.ActionText = string.Empty;
                await ViewService.DisplayAlert(
                    "Fehler bei Standortabfrage!",
                    string.Format($"Schloss schließen und Miete beenden ist nicht möglich.\r\n{ex.Message}"),
                    "OK");

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

                BikesViewModel.ActionText = string.Empty;
                BikesViewModel.IsIdle = true; // Unlock GUI                
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }

            // Lock list to avoid multiple taps while copri action is pending.
            BikesViewModel.ActionText = "Gebe Rad zurück...";

            IsConnected = IsConnectedDelegate();

            var feedBackUri = SelectedBike?.OperatorUri;

            try
            {
                await ConnectorFactory(IsConnected).Command.DoReturn(
                    SelectedBike,
                    currentLocation != null 
                        ? new LocationDto.Builder
                            {
                                Latitude = currentLocation.Latitude,
                                Longitude = currentLocation.Longitude,
                                Accuracy = currentLocation.Accuracy ?? double.NaN,
                                Age = timeStamp.Subtract(currentLocation.Timestamp.DateTime),
                            }.Build()
                        : null);
                // If canceling bike succedes remove bike because it is not ready to be booked again
                IsRemoveBikeRequired = true;
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;
                if (exception is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedOpen>().Information("User selected booked bike {bike} but returing failed (Copri server not reachable).", SelectedBike);

                    await ViewService.DisplayAlert(
                        "Verbingungsfehler beim Zurückgeben des Rads!",
                        string.Format("{0}\r\n{1}\r\n{2}", "Internet muss erreichbar sein beim Zurückgeben des Rads.", exception.Message, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
                        "OK");
                }
                else if (exception is NotAtStationException notAtStationException)
                {
                    // COPRI returned an error.
                    Log.ForContext<BookedOpen>().Information("User selected booked bike {bike} but returing failed. COPRI returned an error.", SelectedBike);

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

                    await ViewService.DisplayAlert(
                        AppResources.ErrorReturnBikeNotAtStationTitle,
                        string.Format(AppResources.ErrorReturnBikeLockOpenNoGPSMessage),
                        "OK");
                }
                else if (exception is ResponseException copriException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedOpen>().Information("User selected booked bike {bike} but returing failed. COPRI returned an error.", SelectedBike);

                    await ViewService.DisplayAdvancedAlert(
                        "Statusfehler beim Zurückgeben des Rads!",
                        copriException.Message,
                        copriException.Response,
                        "OK");
                }
                else
                {
                    Log.ForContext<BookedOpen>().Error("User selected availalbe bike {bike} but reserving failed. {@l_oException}", SelectedBike.Id, exception);

                    await ViewService.DisplayAlert("Fehler beim Zurückgeben des Rads!", exception.Message, "OK");
                }

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically();

                BikesViewModel.ActionText = string.Empty;
                BikesViewModel.IsIdle = true;
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }
  
            Log.ForContext<BookedOpen>().Information("User returned bike {bike} successfully.", SelectedBike);

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

                BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
            }

#if !USERFEEDBACKDLG_OFF
            // Do get Feedback
            var feedback = await ViewService.DisplayUserFeedbackPopup();

            try
            {
                await ConnectorFactory(IsConnected).Command.DoSubmitFeedback(
                     new UserFeedbackDto { 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<BookedOpen>().Information("User selected booked bike {bike} but returing failed. COPRI returned an error.", SelectedBike);
                }
                else
                {
                    Log.ForContext<BookedOpen>().Error("User selected availalbe bike {bike} but reserving failed. {@l_oException}", SelectedBike.Id, exception);
                }

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically();

                BikesViewModel.ActionText = string.Empty;
                BikesViewModel.IsIdle = true;
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }
#endif

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

        /// <summary> Close lock in order to pause ride and update COPRI lock state.</summary>
        public async Task<IRequestHandler> HandleRequestOption2()
        {
            // Unlock bike.
            BikesViewModel.IsIdle = false;
            Log.ForContext<BookedOpen>().Information("User request to lock bike {bike} in order to pause ride.", SelectedBike);

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

            BikesViewModel.ActionText = AppResources.ActivityTextClosingLock;

            try
            {
                SelectedBike.LockInfo.State = (await LockService[SelectedBike.LockInfo.Id].CloseAsync())?.GetLockingState() ?? LockingState.Disconnected;
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;

                if (exception is OutOfReachException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. {Exception}", exception);
                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockOutOfReachMessage,
                        "OK");
                }
                else if (exception is CounldntCloseMovingException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockMovingMessage,
                        "OK");
                }
                else if (exception is CouldntCloseBoldBlockedException)
                {
                    Log.ForContext<BookedOpen>().Debug("Lock can not be closed. Lock is out of reach. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        AppResources.ErrorCloseLockBoldBlockedMessage,
                        "OK");
                }
                else
                {
                    Log.ForContext<BookedOpen>().Error("Lock can not be closed. {Exception}", exception);
                    await ViewService.DisplayAlert(
                        AppResources.ErrorCloseLockTitle,
                        exception.Message,
                        "OK");
                }

                SelectedBike.LockInfo.State = exception is StateAwareException stateAwareException
                    ? stateAwareException.State
                    : LockingState.Disconnected;

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

            // Get geoposition.
            var timeStamp = DateTime.Now;
            BikesViewModel.ActionText = "Abfrage Standort...";
            Location currentLocation = null;
            try
            {
                currentLocation = await Geolocation.GetAsync(timeStamp);
            }
            catch (Exception ex)
            {
                // No location information available.
                Log.ForContext<BookedOpen>().Information("Returning bike {Bike} is not possible. {Exception}", SelectedBike, ex);

                BikesViewModel.ActionText = "Keine Standortinformationen verfügbar.";
            }

            // Lock list to avoid multiple taps while copri action is pending.
            BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdatingLockingState;

            IsConnected = IsConnectedDelegate();

            try
            {
                await ConnectorFactory(IsConnected).Command.UpdateLockingStateAsync(
                    SelectedBike,
                    currentLocation != null
                        ? new LocationDto.Builder
                            {
                                Latitude = currentLocation.Latitude,
                                Longitude = currentLocation.Longitude,
                                Accuracy = currentLocation.Accuracy ?? double.NaN,
                                Age = timeStamp.Subtract(currentLocation.Timestamp.DateTime),
                            }.Build()
                        : null);
            }
            catch (Exception exception)
            {
                if (exception is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedOpen>().Information("User locked bike {bike} in order to pause ride but updating failed (Copri server not reachable).", SelectedBike);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorNoWebUpdateingLockstate;
                }
                else if (exception is ResponseException copriException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedOpen>().Information("User locked bike {bike} in order to pause ride but updating failed. Message: {Message} Details: {Details}", SelectedBike, copriException.Message, copriException.Response);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorStatusUpdateingLockstate;
                }
                else
                {
                    Log.ForContext<BookedOpen>().Error("User locked bike {bike} in order to pause ride but updating failed. {@l_oException}", SelectedBike.Id, exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorConnectionUpdateingLockstate;
                }
            }

            Log.ForContext<BookedOpen>().Information("User paused ride using {bike} successfully.", SelectedBike);
            BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
            await ViewUpdateManager().StartUpdateAyncPeridically();
            BikesViewModel.ActionText = string.Empty;
            BikesViewModel.IsIdle = true;
            return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
        } 
    }
}