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

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    public class BookedDisconnected : 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 BookedDisconnected(
           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,
               nameof(BookedDisconnected), 
               false, 
               isConnectedDelegate,
               connectorFactory,
               geolocation,
               lockService,
               viewUpdateManager,
               smartDevice,
               viewService,
               bikesViewModel,
               activeUser)
        {
            LockitButtonText = AppResources.ActionSearchLock;
            IsLockitButtonVisible = true; 
        }

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

        public async Task<IRequestHandler> HandleRequestOption1() => await UnsupportedRequest();

        /// <summary> Scan for lock.</summary>
        /// <returns></returns>
        public async Task<IRequestHandler> HandleRequestOption2() => await ConnectLock();

            /// <summary> Requst is not supported, button should be disabled. </summary>
            /// <returns></returns>
            public async Task<IRequestHandler> UnsupportedRequest()
        {
            Log.ForContext<BookedDisconnected>().Error("Click of unsupported button click detected.");
            return await Task.FromResult<IRequestHandler>(this);
        }

        /// <summary> Scan for lock.</summary>
        /// <returns></returns>
        public async Task<IRequestHandler> ConnectLock()
        {
            // Lock list to avoid multiple taps while copri action is pending.
            BikesViewModel.IsIdle = false;
            Log.ForContext<BookedDisconnected>().Information("Request to search {bike} detected.", SelectedBike);

            // Stop polling before getting new auth-values.
            BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
            await ViewUpdateManager().StopUpdatePeridically();

            BikesViewModel.ActionText = AppResources.ActivityTextQuerryServer;
            IsConnected = IsConnectedDelegate();
            try
            {
                // Repeat booking to get a new seed/ k_user value.
                await ConnectorFactory(IsConnected).Command.CalculateAuthKeys(SelectedBike);
            }
            catch (Exception exception)
            {
                BikesViewModel.ActionText = string.Empty;

                if (exception is WebConnectFailureException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<BookedDisconnected>().Information("User selected booked bike {l_oId} to connect to lock. (Copri server not reachable).", SelectedBike.Id);

                    await ViewService.DisplayAlert(
                        AppResources.MessageConnectLockErrorTitle,
                        $"{AppResources.ErrorConnectLockRentedBikeNoWebMessage}\r\n{exception.Message}\r\n{WebConnectFailureException.GetHintToPossibleExceptionsReasons}",
                        AppResources.MessageAnswerOk);
                }
                else
                {
                    Log.ForContext<BookedDisconnected>().Error("User selected booked bike {l_oId} to connect to lock. {@l_oException}", SelectedBike.Id, exception);

                    await ViewService.DisplayAlert(
                        AppResources.MessageConnectLockErrorTitle,
                        $"{AppResources.ErrorConnectLockGeneralErrorMessage}\r\n{exception.Message}",
                        AppResources.MessageAnswerOk);
                }

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

            LockInfoTdo result = null;
            var continueConnect = true;
            var retryCount = 1;
            while (continueConnect && 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(retryCount));
                }
                catch (Exception exception)
                {

                    BikesViewModel.ActionText = string.Empty;
                    if (exception is ConnectBluetoothNotOnException)
                    {
                        continueConnect = false;

                        await ViewService.DisplayAlert(
                            AppResources.MessageConnectLockErrorTitle,
                            AppResources.ErrorFindLockBluetoothNotOn,
                            AppResources.MessageAnswerOk);
                    }
                    else if (exception is ConnectLocationPermissionMissingException)
                    {
                        continueConnect = false;

                        await ViewService.DisplayAlert(
                            AppResources.MessageConnectLockErrorTitle,
                            AppResources.ErrorFindLockLocationPermissionMissing,
                            AppResources.MessageAnswerOk);
                    }
                    else if (exception is ConnectLocationOffException)
                    {
                        continueConnect = false;

                        await ViewService.DisplayAlert(
                            AppResources.MessageConnectLockErrorTitle,
                            AppResources.ErrorFindLockLocationOff,
                            AppResources.MessageAnswerOk);
                    }
                    else if (exception is OutOfReachException)
                    {
                        Log.ForContext<BookedDisconnected>().Debug("Lock can not be found. {Exception}", exception);

                        continueConnect = await ViewService.DisplayAlert(
                            AppResources.MessageConnectLockErrorTitle,
                            AppResources.ErrorFindLockRentedBikeOutOfReachMessage,
                            AppResources.MessageAnswerRetry,
                            AppResources.MessageAnswerCancel);
                    }
                    else
                    {
                        Log.ForContext<BookedDisconnected>().Error("Lock can not be found. {Exception}", exception);

                        string message;
                        if (retryCount < 2)
                        {
                            message = AppResources.ErrorBookedSearchMessage;
                        } 
                        else if (retryCount < 3)
                        {
                            message = AppResources.ErrorBookedSearchMessageEscalationLevel1;
                        }
                        else
                        {
                            message = AppResources.ErrorBookedSearchMessageEscalationLevel2;
                        }


                        continueConnect = await ViewService.DisplayAdvancedAlert(
                                AppResources.MessageConnectLockErrorTitle,
                                message,
                                "", // bool IsReportLevelVerbose ? exception.Message : string.Empty,  // or use ActiveUser.DebugLevel.HasFlag(Permissions.ReportLevel) instead?
                                AppResources.MessageAnswerRetry,
                                AppResources.MessageAnswerCancel);
                    }

                    if (continueConnect)
                    {
                        retryCount++;
                        continue;
                    }

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

            if (result?.State == null)
            {
                Log.ForContext<BookedDisconnected>().Information("Lock for bike {bike} not found.", SelectedBike);

                BikesViewModel.ActionText = "";
                await ViewService.DisplayAlert(
                    AppResources.MessageConnectLockErrorTitle,
                    $"Schlossstatus des gemieteten Rads konnte nicht ermittelt werden.",
                    AppResources.MessageAnswerOk);

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

            var state = result.State.Value.GetLockingState();
            SelectedBike.LockInfo.State = state;
            SelectedBike.LockInfo.Guid = result?.Guid ?? new Guid();

            Log.ForContext<BookedDisconnected>().Information($"State for bike {SelectedBike.Id} updated successfully. Value is {SelectedBike.LockInfo.State}.");

            // 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);
        }
    }
}