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

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    public class BookedClosed : 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 BookedClosed(
           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, 
               AppResources.ActionReturn, // Copri button text "Miete beenden"
               true, // Show button to enabled returning of bike.
               isConnectedDelegate,               
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager,
               smartDevice,
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = AppResources.ActionOpenAndPause;
            IsLockitButtonVisible = true; // Show button to enable opening lock in case user took a pause and does not want to return the bike.
        }

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

        /// <summary> Return bike. </summary>
        public async Task<IRequestHandler> HandleRequestOption1() => await ReturnBike();

        /// <summary> Open bike and update COPRI lock state. </summary>
        public async Task<IRequestHandler> HandleRequestOption2() => await OpenLock();


        /// <summary> Return bike. </summary>
        public async Task<IRequestHandler> ReturnBike()
        {
            BikesViewModel.IsIdle = false;
            var ctsLocation = new CancellationTokenSource();
            Task<Location> currentLocationTask = null;
            var timeStamp = DateTime.Now;

            // Check if bike is around.
            var deviceState = LockService[SelectedBike.LockInfo.Id].GetDeviceState();
            if (deviceState == DeviceState.Connected)
            {
                BikesViewModel.ActionText = AppResources.ActivityTextQueryLocationStart;    // Bluetooth is in reach

                // Start getting geolocation.
                try
                {
                    currentLocationTask = Geolocation.GetAsync(ctsLocation.Token, timeStamp);
                }
                catch (Exception ex)
                {
                    // No location information available.
                    Log.ForContext<BookedClosed>().Information("Getting geolocation when returning bike {Bike} failed. {Exception}", SelectedBike, ex);
                }
            }

            // Ask whether to really return bike?
            var l_oResult = await ViewService.DisplayAlert(
                string.Empty,
                string.Format(AppResources.QuestionReturnBike, SelectedBike.GetFullDisplayName()),
                AppResources.MessageAnswerYes,
                AppResources.MessageAnswerNo);

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

                // Cancel getting geolocation.
                ctsLocation.Cancel();
                BikesViewModel.ActionText = AppResources.ActivityTextQueryLocationCancelWait;
                try
                {
                    await Task.WhenAny(new List<Task> { currentLocationTask ?? Task.CompletedTask });
                }
                catch (Exception ex)
                {
                    // No location information available.
                    Log.ForContext<BookedClosed>().Information("Canceling query location failed on abort returning closed bike failed. {Exception}", SelectedBike, ex);
                }

                BikesViewModel.IsIdle = true;
                return this;
            }

            // Lock list to avoid multiple taps while copri action is pending.
            Log.ForContext<BookedClosed>().Information("Request to return bike {bike} detected.", SelectedBike);

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

            // Check if bike is around.
            Location currentLocation = null;
            LocationDto currentLocationDto = null;
            if (deviceState == DeviceState.Connected)
            {
                BikesViewModel.ActionText = AppResources.ActivityTextQueryLocation;
                try
                {
                    await Task.WhenAny(new List<Task> { currentLocationTask ?? Task.CompletedTask });
                    currentLocation = currentLocationTask?.Result ?? null;
                }
                catch (Exception ex)
                {
                    // No location information available.
                    Log.ForContext<BookedClosed>().Information("Returning closed bike {Bike} is not possible. Cancel geolocation query failed. {Exception}", SelectedBike, ex);
                }

                currentLocationDto = currentLocation != null
                    ? new LocationDto.Builder
                    {
                        Latitude = currentLocation.Latitude,
                        Longitude = currentLocation.Longitude,
                        Accuracy = currentLocation.Accuracy ?? double.NaN,
                        Age = timeStamp.Subtract(currentLocation.Timestamp.DateTime),
                    }.Build()
                    : null;
            }
            else
            {
                // Bluetooth out of reach. Lock state is no more known.
                SelectedBike.LockInfo.State = LockingState.UnknownDisconnected;
            }

            BikesViewModel.ActionText = "Returning bike...";
            IsConnected = IsConnectedDelegate();

            var feedBackUri = SelectedBike?.OperatorUri;
            BookingFinishedModel bookingFinished;
            try
            {
                bookingFinished = await ConnectorFactory(IsConnected).Command.DoReturn(
                    SelectedBike,
                    currentLocationDto);

                // 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<BookedClosed>().Information("User selected booked bike {bike} but returing failed (Copri server not reachable).", SelectedBike);

                    await ViewService.DisplayAdvancedAlert(
                        AppResources.ErrorReturnBikeNoWebTitle,
                        string.Format("{0}\r\n{1}", AppResources.ErrorReturnBikeNoWebMessage, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
                        exception.Message,
                        AppResources.MessageAnswerOk);
                }
                else if (exception is NotAtStationException notAtStationException)
                {
                    // COPRI returned an error.
                    Log.ForContext<BookedClosed>().Information("User selected booked bike {bike} but returning failed. COPRI returned an not at station error.", SelectedBike);

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

                    await ViewService.DisplayAlert(
                        AppResources.ErrorReturnBikeTitle,
                        string.Format(AppResources.ErrorReturnBikeLockClosedNoGPSMessage),
                        AppResources.MessageAnswerOk);
                }
                else if (exception is ResponseException copriException)
                {
                    // COPRI returned an error.
                    Log.ForContext<BookedClosed>().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<BookedClosed>().Error("User selected booked bike {bike} but returning failed. {@l_oException}", SelectedBike.Id, exception);

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

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

            Log.ForContext<BookedClosed>().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<BookedClosed>().Error("Lock can not be disconnected. {Exception}", exception);

                BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
            }


#if !USERFEEDBACKDLG_OFF
            // Do get Feedback
            var feedback = await ViewService.DisplayUserFeedbackPopup(bookingFinished?.Co2Saving);

            try
            {
                await ConnectorFactory(IsConnected).Command.DoSubmitFeedback(
                     new UserFeedbackDto { BikeId = SelectedBike.Id, 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<BookedClosed>().Information("Submitting feedback for bike {bike} failed. COPRI returned an error.", SelectedBike);
                }
                else
                {
                    Log.ForContext<BookedClosed>().Error("Submitting feedback for bike {bike} failed. {@l_oException}", SelectedBike.Id, exception);
                }

                await ViewService.DisplayAlert(
                    AppResources.ErrorReturnSubmitFeedbackTitle,
                    AppResources.ErrorReturnSubmitFeedbackMessage,
                    AppResources.MessageAnswerOk);


                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);
            }
#endif
            if (bookingFinished != null && bookingFinished.MiniSurvey.Questions.Count > 0)
            {
                await ViewService.PushModalAsync(ViewTypes.MiniSurvey);
            }

            // 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);
        }

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

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

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

                if (exception is OutOfReachException)
                {
                    Log.ForContext<BookedClosed>().Debug("Lock can not be opened. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockOutOfReachMessage,
                        AppResources.MessageAnswerOk);
                }
                else if (exception is CouldntOpenBoldIsBlockedException)
                {
                    Log.ForContext<BookedClosed>().Debug("Lock can not be opened. Bold is blocked. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockBoldBlockedMessage,
                        AppResources.MessageAnswerOk);
                }
                else if (exception is CouldntOpenBoldWasBlockedException)
                {
                    Log.ForContext<BookedClosed>().Debug("Lock can not be opened. Bold was or is blocked. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockStillOpenTitle,
                        AppResources.ErrorOpenLockBoldWasBlockedMessage,
                        "OK");
                }
                else if (exception is CouldntOpenInconsistentStateExecption inconsistentState
                        && inconsistentState.State == LockingState.Closed)
                {
                    Log.ForContext<BookedClosed>().Debug("Lock can not be opened. lock reports state closed. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockStillClosedMessage,
                        "OK");
                }
                else
                {
                    Log.ForContext<BookedClosed>().Error("Lock can not be opened. {Exception}", exception);

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

                // When bold is blocked lock is still closed even if exception occurres.
                // 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;

                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);
            }

            BikesViewModel.ActionText = AppResources.ActivityTextReadingChargingLevel;
            try
            {
                SelectedBike.LockInfo.BatteryPercentage = await LockService[SelectedBike.LockInfo.Id].GetBatteryPercentageAsync();
            }
            catch (Exception exception)
            {
                if (exception is OutOfReachException)
                {
                    Log.ForContext<BookedClosed>().Debug("Akkustate can not be read, bike out of range. {Exception}", exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
                }
                else
                {
                    Log.ForContext<BookedClosed>().Error("Akkustate can not be read. {Exception}", exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelGeneral;
                }
            }

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

            IsConnected = IsConnectedDelegate();

            try
            {
                await ConnectorFactory(IsConnected).Command.UpdateLockingStateAsync(SelectedBike);
            }
            catch (Exception exception)
            {
                if (exception is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedClosed>().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<BookedClosed>().Information("User locked bike {bike} in order to pause ride but updating failed. {response}.", SelectedBike, copriException.Response);

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

            Log.ForContext<BookedClosed>().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, SmartDevice, ViewService, BikesViewModel, ActiveUser);
        }
    }
}