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

namespace TINK.ViewModel.Bikes.Bike.CopriLock.RequestHandler
{
    using IRequestHandler = BluetoothLock.IRequestHandler;

    public class DisposabledAway : 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 DisposabledAway(
           IBikeInfoMutable selectedBike,
           Func<bool> isConnectedDelegate,
           Func<bool, IConnector> connectorFactory,
           IGeolocation geolocation,
           Func<IPollingUpdateTaskManager> viewUpdateManager,
           ISmartDevice smartDevice,
           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,
               viewUpdateManager,
               smartDevice,
               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() => await Reserve();

        public async Task<IRequestHandler> HandleRequestOption2() => await UnsupportedRequest();

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

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

            if (alertResult == false)
            {
                // User aborted booking process
                Log.ForContext<DisposabledAway>().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<DisposabledAway>().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<DisposabledAway>().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<DisposabledAway>().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<DisposabledAway>().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;
            }

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

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