using Serilog;
using System;
using System.Threading.Tasks;
using TINK.Model.Connector;
using TINK.Repository.Exception;
using TINK.Model.Bike.BluetoothLock;
using TINK.Model.State;
using TINK.View;

using IBikeInfoMutable = TINK.Model.Bikes.Bike.BluetoothLock.IBikeInfoMutable;
using TINK.Model.Services.Geolocation;
using TINK.Services.BluetoothLock;
using TINK.Services.BluetoothLock.Exception;
using TINK.MultilingualResources;
using TINK.Model.User;
using TINK.Model.Device;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    /// <summary> Bike is reserved, lock is closed and and connected to app. </summary>
    /// <remarks> 
    /// Occures when 
    /// - biks was reserved out of reach and is in reach now
    /// - bike is is reserved while in reach
    /// </remarks>
    public class ReservedClosed : 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 ReservedClosed(
           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.ActionCancelRequest, // Copri button text: "Reservierung abbrechen"
               true, // Show button to enable canceling reservation.
               isConnectedDelegate, 
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager,
               smartDevice,
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = AppResources.ActionOpenAndBook; // Button text: "Schloss öffnen & Rad mieten"
            IsLockitButtonVisible = true; // Show "Öffnen" button to enable unlocking
        }

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

        /// <summary> Cancel reservation. </summary>
        public async Task<IRequestHandler> HandleRequestOption1() => await CancelReservation();

        /// <summary> Open lock and book bike. </summary>
        public async Task<IRequestHandler> HandleRequestOption2() => await OpenLockAndDooBook();

        /// <summary> Cancel reservation. </summary>
        public async Task<IRequestHandler> CancelReservation()
        {
            BikesViewModel.IsIdle = false; // Lock list to avoid multiple taps while copri action is pending.

            var l_oResult = await ViewService.DisplayAlert(
                string.Empty,
                string.Format(AppResources.QuestionCancelReservation, SelectedBike.GetFullDisplayName()),
                AppResources.QuestionAnswerYes,
                AppResources.QuestionAnswerNo);

            if (l_oResult == false) 
            {
                // User aborted cancel process
                Log.ForContext<ReservedClosed>().Information("User selected reserved bike {l_oId} in order to cancel reservation but action was canceled.", SelectedBike.Id);
                BikesViewModel.IsIdle = true;
                return this;
            }

            Log.ForContext<ReservedClosed>().Information("User selected reserved bike {l_oId} in order to cancel reservation.", SelectedBike.Id);

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

            BikesViewModel.ActionText = AppResources.ActivityTextCancelingReservation;
            IsConnected = IsConnectedDelegate();
            try
            {
                await ConnectorFactory(IsConnected).Command.DoCancelReservation(SelectedBike);

                // If canceling bike succedes remove bike because it is not ready to be booked again
                IsRemoveBikeRequired = true;
            }
            catch (Exception l_oException)
            {
                BikesViewModel.ActionText = string.Empty;

                if (l_oException is InvalidAuthorizationResponseException)
                {
                    // Copri response is invalid.
                    Log.ForContext<BikesViewModel>().Error("User selected reserved bike {l_oId} but canceling reservation failed (Invalid auth. response).", SelectedBike.Id);
                    
                    await ViewService.DisplayAlert(
                        "Fehler beim Aufheben der Reservierung!", 
                        l_oException.Message, 
                        "OK");
                }
                else if (l_oException is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BikesViewModel>().Information("User selected reserved bike {l_oId} but cancel reservation failed (Copri server not reachable).", SelectedBike.Id);
                    await ViewService.DisplayAlert(
                        "Verbingungsfehler beim Aufheben der Reservierung!",
                        string.Format("{0}\r\n{1}", l_oException.Message, WebConnectFailureException.GetHintToPossibleExceptionsReasons),
                        "OK");
                }
                else
                {
                    Log.ForContext<BikesViewModel>().Error("User selected reserved bike {l_oId} but cancel reservation failed. {@l_oException}.", SelectedBike.Id, l_oException);
                    await ViewService.DisplayAlert(
                        "Fehler beim Aufheben der Reservierung!", 
                        l_oException.Message, 
                        "OK");                    
                }

                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, SmartDevice, ViewService, BikesViewModel, ActiveUser);
            }

            Log.ForContext<BikesViewModel>().Information("User canceled reservation of bike {l_oId} successfully.", SelectedBike.Id);

            // 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;
            }

            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, SmartDevice, ViewService, BikesViewModel, ActiveUser);
        }

        /// <summary> Open lock and book bike. </summary>
        public async Task<IRequestHandler> OpenLockAndDooBook()
        {
            BikesViewModel.IsIdle = false;

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

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

            Log.ForContext<ReservedClosed>().Information("User selected requested bike {bike} in order to book but action was canceled.", SelectedBike);

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

            // 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<ReservedClosed>().Information("User selected 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<ReservedClosed>().Error("User selected 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, SmartDevice, 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<ReservedClosed>().Debug("Lock can not be opened. {Exception}", exception);

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

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockBoldBlockedMessage,
                        "OK");
                }
                else if (exception is CouldntOpenBoldWasBlockedException)
                {
                    Log.ForContext<ReservedClosed>().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<ReservedClosed>().Debug("Lock can not be opened. lock reports state closed. {Exception}", exception);

                    await ViewService.DisplayAlert(
                        AppResources.ErrorOpenLockTitle,
                        AppResources.ErrorOpenLockStillClosedMessage,
                        "OK");
                }
                else
                {
                    Log.ForContext<ReservedClosed>().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, SmartDevice, 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, 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<ReservedClosed>().Debug("Akkustate can not be read, bike out of range. {Exception}", exception);

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

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

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