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

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    public class DisposableDisconnected : Base, IRequestHandler
    {
        /// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
        public DisposableDisconnected(
           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.ActionRequest, // Copri text: "Rad reservieren"
               true, // Show copri button to enable reserving and opening
               isConnectedDelegate,
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager,
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = GetType().Name;
            IsLockitButtonVisible = false; // If bike is not reserved/ booked app can not connect to lock
        }

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

        /// <summary>Reserve bike and connect to lock.</summary>
        public async Task<IRequestHandler> HandleRequestOption1()
        {
            BikesViewModel.IsIdle = false;

            // Ask whether to really book bike?
            var alertResult = await ViewService.DisplayAlert(
                string.Empty,
                string.Format(AppResources.QuestionReserveBike, SelectedBike.GetDisplayName(), StateRequestedInfo.MaximumReserveTime.Minutes),
                AppResources.MessageAnswerYes,
                AppResources.MessageAnswerNo);

            if (alertResult == false)
            {
                // User aborted booking process
                Log.ForContext<DisposableDisconnected>().Information("User selected availalbe bike {bike} in order to reserve but action was canceled.", SelectedBike);
                BikesViewModel.IsIdle = true;
                return this;
            }

            // Lock list to avoid multiple taps while copri action is pending.
            Log.ForContext<DisposableDisconnected>().Information("Request to book and open lock for bike {bike} detected.", SelectedBike);
            BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;

            // Stop polling before requesting bike.
            await ViewUpdateManager().StopUpdatePeridically();

            BikesViewModel.ActionText = AppResources.ActivityTextReservingBike; 
            IsConnected = IsConnectedDelegate();

            try
            {
                await ConnectorFactory(IsConnected).Command.DoReserve(SelectedBike);
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;

                if (exception is BookingDeclinedException)
                {
                    // Too many bikes booked.
                    Log.ForContext<DisposableDisconnected>().Information("Request declined because maximum count of bikes {l_oException.MaxBikesCount} already requested/ booked.", (exception as BookingDeclinedException).MaxBikesCount);

                    await ViewService.DisplayAlert(
                        AppResources.MessageTitleHint,
                        string.Format(AppResources.MessageReservationBikeErrorTooManyReservationsRentals, SelectedBike.Id, (exception as BookingDeclinedException).MaxBikesCount),
                        AppResources.MessageAnswerOk);
                }
                else if (exception is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<DisposableDisconnected>().Information("User selected availalbe bike {bike} but reserving failed (Copri server not reachable).", SelectedBike);

                    await ViewService.DisplayAlert(
                        "Verbingungsfehler beim Reservieren des Rads!",
                        string.Format("{0}\r\n{1}", exception.Message, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
                        "OK");
                }
                else
                {
                    Log.ForContext<DisposableDisconnected>().Error("User selected availalbe bike {bike} but reserving failed. {@l_oException}", SelectedBike, exception);

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

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

            // Search for lock.
            LockInfoTdo 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(1));
            }
            catch (Exception exception)
            {
                // Do not display any messages here, because search is implicit.
                if (exception is OutOfReachException)
                {
                    Log.ForContext<DisposableDisconnected>().Debug("Lock state can not be retrieved, lock is out of reach. {Exception}", exception);

                    BikesViewModel.ActionText = "Schloss außerhalb Reichweite";
                }
                else
                {
                    Log.ForContext<DisposableDisconnected>().Error("Lock state can not be retrieved. {Exception}", exception);
                    BikesViewModel.ActionText = "Schloss nicht gefunden";
                }

                // 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, ViewService, BikesViewModel, ActiveUser);
            }

            SelectedBike.LockInfo.State = result?.State?.GetLockingState() ?? LockingState.Disconnected;
            if (SelectedBike.LockInfo.State == LockingState.Disconnected)
            {
                // Do not display any messages here, because search is implicit.
                Log.ForContext<DisposableDisconnected>().Information("Lock for bike {bike} not found.", SelectedBike);

                // 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, ViewService, BikesViewModel, ActiveUser);
            }
            SelectedBike.LockInfo.Guid = result?.Guid ?? new Guid();

            Log.ForContext<DisposableDisconnected>().Information("Lock found {bike} successfully.", SelectedBike);

            BikesViewModel.ActionText = string.Empty;

            // Ask whether to really book bike?
            alertResult = await ViewService.DisplayAlert(
                string.Empty,
                string.Format(AppResources.MessageOpenLockAndBookeBike, SelectedBike.GetDisplayName()),
                AppResources.MessageAnswerYes,
                AppResources.MessageAnswerNo);

            if (alertResult == false)
            {
                // User aborted booking process
                Log.ForContext<DisposableDisconnected>().Information("User selected recently requested bike {bike} in order to reserve but did deny to book bike.", 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<DisposableDisconnected>().Error("Lock can not be disconnected. {Exception}", exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorDisconnect;
                }

                // 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, ViewService, BikesViewModel, ActiveUser);
            }

            Log.ForContext<DisposableDisconnected>().Information("User selected recently requested bike {bike} in order to book.", SelectedBike);

            // Book bike prior to opening lock.
            BikesViewModel.ActionText = AppResources.ActivityTextRentingBike;
            IsConnected = IsConnectedDelegate();
            try
            {
                await ConnectorFactory(IsConnected).Command.DoBook(SelectedBike);
            }
            catch (Exception l_oException)
            {
                BikesViewModel.ActionText = string.Empty;

                if (l_oException is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<DisposableDisconnected>().Information("User selected recently requested bike {l_oId} but booking failed (Copri server not reachable).", SelectedBike.Id);

                    await ViewService.DisplayAdvancedAlert(
                        AppResources.MessageRentingBikeErrorConnectionTitle,
                        WebConnectFailureException.GetHintToPossibleExceptionsReasons,
                        l_oException.Message,
                        AppResources.MessageAnswerOk);
                }
                else
                {
                    Log.ForContext<DisposableDisconnected>().Error("User selected recently requested bike {l_oId} but reserving failed. {@l_oException}", SelectedBike.Id, l_oException);

                    await ViewService.DisplayAdvancedAlert(
                        AppResources.MessageRentingBikeErrorGeneralTitle,
                        string.Empty,
                        l_oException.Message,
                        AppResources.MessageAnswerOk);
                }

                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.
                BikesViewModel.IsIdle = true; // Unlock GUI
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }

            // Unlock bike.
            BikesViewModel.ActionText = AppResources.ActivityTextOpeningLock;
            try
            {
                SelectedBike.LockInfo.State = (await LockService[SelectedBike.LockInfo.Id].OpenAsync())?.GetLockingState() ?? LockingState.Disconnected;
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;
                if (exception is OutOfReachException)
                {
                    Log.ForContext<DisposableDisconnected>().Debug("Lock can not be opened. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockOutOfReadMessage,
                        "OK");
                }
                else if (exception is CouldntOpenBoldBlockedException)
                {
                    Log.ForContext<DisposableDisconnected>().Debug("Lock can not be opened. Bold is blocked. {Exception}", exception);

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

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockStillClosedMessage,
                        "OK");
                }
                else
                {
                    Log.ForContext<DisposableDisconnected>().Error("Lock can not be opened. {Exception}", exception);
                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        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;
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, ViewService, BikesViewModel, ActiveUser);
            }

            if (SelectedBike.LockInfo.State != LockingState.Open)
            {
                // Opening lock failed.
                BikesViewModel.ActionText = AppResources.ActivityTextStartingUpdater;
                await ViewUpdateManager().StartUpdateAyncPeridically(); // Restart polling again.

                BikesViewModel.ActionText = "";
                BikesViewModel.IsIdle = true; // Unlock GUI
                return RequestHandlerFactory.Create(SelectedBike, IsConnectedDelegate, ConnectorFactory, Geolocation, LockService, ViewUpdateManager, 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<DisposableDisconnected>().Debug("Akkustate can not be read, bike out of range. {Exception}", exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorReadingChargingLevelOutOfReach;
                }
                else
                {
                    Log.ForContext<DisposableDisconnected>().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<DisposableDisconnected>().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<DisposableDisconnected>().Information("User locked bike {bike} in order to pause ride but updating failed. {response}.", SelectedBike, copriException.Response);

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

            Log.ForContext<DisposableDisconnected>().Information("User reserved bike {bike} successfully.", SelectedBike);
            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);
        }

        public  Task<IRequestHandler> HandleRequestOption2()
        {
            throw new NotSupportedException();
        }
    }
}