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.Model.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 l_oException)
            {
                BikesViewModel.ActionText = string.Empty;

                if (l_oException 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(
                        "Fehler bei Verbinden mit Schloss!",
                        $"Internet muss erreichbar sein um Verbindung mit Schloss für gemietetes Rad herzustellen.\r\n{l_oException.Message}\r\n{WebConnectFailureException.GetHintToPossibleExceptionsReasons}",
                        "OK");
                }
                else
                {
                    Log.ForContext<BookedDisconnected>().Error("User selected booked bike {l_oId} to connect to lock. {@l_oException}", SelectedBike.Id, l_oException);

                    await ViewService.DisplayAlert(
                        "Fehler bei Verbinden mit Schloss!",
                        $"Kommunikationsfehler bei Schlosssuche.\r\n{l_oException.Message}",
                        "OK");
                }

                // 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 OutOfReachException)
                    {
                        Log.ForContext<BookedDisconnected>().Debug("Lock can not be found. {Exception}", exception);

                        continueConnect = await ViewService.DisplayAlert(
                            "Fehler bei Verbinden mit Schloss!",
                            "Schloss kann erst gefunden werden, wenn gemietetes Rad in der Nähe ist.",
                            "Wiederholen",
                            "Abbrechen");
                    }
                    else
                    {
                        Log.ForContext<BookedDisconnected>().Error("Lock can not be found. {Exception}", exception);

                        continueConnect = await ViewService.DisplayAdvancedAlert(
                                "Fehler bei Verbinden mit Schloss!",
                                AppResources.ErrorBookedSearchMessage,
                                exception.Message,
                                "Wiederholen",
                                "Abbrechen");
                    }

                    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(
                    "Fehler bei Verbinden mit Schloss!",
                    $"Schlossstatus des gemieteten Rads konnte nicht ermittelt werden.",
                    "OK");

                // 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);
        }
    }
}