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

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,
           IGeolocation geolocation,
           ILocksService lockService,
           Func<IPollingUpdateTaskManager> viewUpdateManager,
           ISmartDevice smartDevice,
           IViewService viewService,
           IBikesViewModel bikesViewModel,
           IUser activeUser) : base(
               selectedBike,
               AppResources.ActionOpenAndBook, // BT button text "Schloss öffnen und Rad mieten."               
               false, // Show button to enabled returning of bike.
               isConnectedDelegate,
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager,
               smartDevice,
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = AppResources.ActionClose; // BT button text "Schließen"
            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.Reserved;

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

        /// <summary> Open bike and update COPRI lock state. </summary>
        public async Task<IRequestHandler> OpenLock()
        {
            // Unlock bike.
            Log.ForContext<ReservedUnknown>().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<ReservedUnknown>().Debug("Lock can not be opened. {Exception}", exception);

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

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

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

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

                // 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<ReservedUnknown>().Debug("Akkustate can not be read, bike out of range. {Exception}", exception);

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

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

            Log.ForContext<ReservedUnknown>().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);
        }

        /// <summary> Close lock in order to pause ride and update COPRI lock state.</summary>
        public async Task<IRequestHandler> HandleRequestOption2() => await CloseLock();


        /// <summary> Close lock in order to pause ride and update COPRI lock state.</summary>
        public async Task<IRequestHandler> CloseLock()
        {
            // Unlock bike.
            BikesViewModel.IsIdle = false;

            Log.ForContext<ReservedUnknown>().Information("User request to lock bike {bike} in order to pause ride.", SelectedBike);

            // Start getting geolocation.
            BikesViewModel.ActionText = AppResources.ActivityTextQueryLocationStart;
            var ctsLocation = new CancellationTokenSource();
            Task<Location> currentLocationTask = null;
            var timeStamp = DateTime.Now;
            try
            {
                currentLocationTask = Geolocation.GetAsync(ctsLocation.Token, timeStamp);
            }
            catch (Exception ex)
            {
                // No location information available.
                Log.ForContext<ReservedUnknown>().Information("Returning bike {Bike} is not possible. Start query location failed. {Exception}", SelectedBike, ex);

                BikesViewModel.ActionText = AppResources.ActivityTextErrorQueryLocationQuery;
            }

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

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

                // Signal cts to  cancel getting geolocation.
                ctsLocation.Cancel();

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

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

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

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

                // Wait until cancel getting geolocation has completed.
                BikesViewModel.ActionText = AppResources.ActivityTextQueryLocationCancelWait;
                try
                {
                    await Task.WhenAny(new List<Task> { currentLocationTask ?? Task.CompletedTask });
                }
                catch (Exception ex)
                {
                    // No location information available.
                    Log.ForContext<ReservedUnknown>().Information("Canceling query location failed on closing lock error. {Exception}", SelectedBike, ex);
                }

                // Wait until cancel getting geolocation has completed.
                BikesViewModel.ActionText = AppResources.ActivityTextQueryLocationCancelWait;
                try
                {
                    await Task.WhenAny(new List<Task> { currentLocationTask ?? Task.CompletedTask });
                }
                catch (Exception ex)
                {
                    // No location information available.
                    Log.ForContext<ReservedUnknown>().Information("Canceling query location failed on closing lock error. {Exception}", SelectedBike, ex);
                }

                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);
            }

            // Get geoposition.
            BikesViewModel.ActionText = AppResources.ActivityTextQueryLocation;
            Location currentLocation = null;
            try
            {
                await Task.WhenAny(new List<Task> { currentLocationTask ?? Task.CompletedTask });
                currentLocation = currentLocationTask?.Result ?? null;
            }
            catch (Exception ex)
            {
                // No location information available.
                Log.ForContext<ReservedUnknown>().Information("Returning bike {Bike} is not possible. {Exception}", SelectedBike, ex);

                BikesViewModel.ActionText = AppResources.ActivityTextErrorQueryLocationWhenAny;
            }

            // 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<ReservedUnknown>().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<ReservedUnknown>().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<ReservedUnknown>().Error("User locked bike {bike} in order to pause ride but updating failed. {@l_oException}", SelectedBike.Id, exception);

                    BikesViewModel.ActionText = AppResources.ActivityTextErrorConnectionUpdateingLockstate;
                }
            }

            Log.ForContext<ReservedUnknown>().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);
        }
    }
}