using System;
using TINK.Model.Bike;
using TINK.Model.Station;
using TINK.Repository.Response;
using TINK.Model.User.Account;
using System.Collections.Generic;
using TINK.Model.State;
using TINK.Repository.Exception;
using Serilog;

using BikeInfo = TINK.Model.Bike.BC.BikeInfo;
using IBikeInfoMutable = TINK.Model.Bikes.Bike.BC.IBikeInfoMutable;
using System.Globalization;
using TINK.Model.Station.Operator;
using Xamarin.Forms;
using System.Linq;
using TINK.Model.MiniSurvey;
using TINK.Services.CopriApi;

namespace TINK.Model.Connector
{
    /// <summary>
    /// Connects TINK app to copri using JSON as input data format.
    /// </summary>
    /// <todo>Rename to UpdateFromCopri.</todo>
    public static class UpdaterJSON
    {
        /// <summary> Loads a bike object from copri server cancel reservation/ booking update request.</summary>
        /// <param name="bike">Bike object to load response into.</param>
        /// <param name="notifyLevel">Controls whether notify property changed events are fired or not.</param>
        public static void Load(
            this IBikeInfoMutable bike,
            Bikes.Bike.BC.NotifyPropertyChangedLevel notifyLevel)
        {

            bike.State.Load(InUseStateEnum.Disposable, notifyLevel: notifyLevel);
        }
        /// <summary>
        /// Gets all statsion for station provider and add them into station list.
        /// </summary>
        /// <param name="p_oStationList">List of stations to update.</param>
        public static StationDictionary GetStationsAllMutable(this StationsAvailableResponse stationsAllResponse)
        {
            // Get stations from Copri/ file/ memory, ....
            if (stationsAllResponse == null
                || stationsAllResponse.stations == null)
            {
                // Latest list of stations could not be retrieved from provider.
                return new StationDictionary();
            }

            Version.TryParse(stationsAllResponse.copri_version, out Version copriVersion);

            var stations = new StationDictionary(p_oVersion: copriVersion);

            foreach (var station in stationsAllResponse.stations)
            {
                if (stations.GetById(station.Value.station) != null)
                {
                    // Can not add station to list of station. Id is not unique.
                    throw new InvalidResponseException<StationsAvailableResponse>(
                        string.Format("Station id {0} is not unique.", station.Value.station), stationsAllResponse);
                }

                stations.Add(new Station.Station(
                    station.Value.station,
                    station.Value.GetGroup(),
                    station.Value.GetPosition(),
                    station.Value.description,
                    new Data(station.Value.operator_data?.operator_name,
                        station.Value.operator_data?.operator_phone,
                        station.Value.operator_data?.operator_hours,
                        station.Value.operator_data?.operator_email,
                        !string.IsNullOrEmpty(station.Value.operator_data?.operator_color) 
                            ? Color.FromHex(station.Value.operator_data?.operator_color)
                            : (Color?)null)));
            }

            return stations;
        }

        /// <summary>
        /// Gets general data from COPRI response.
        /// </summary>
        /// <param name="response">Response to get data from.</param>
        /// <returns>General data object initialized form COPRI response.</returns>
        public static GeneralData GetGeneralData(this ResponseBase response)
             => new GeneralData(
                 response.init_map.GetMapSpan(), 
                 response.merchant_message, 
                 response.TryGetCopriVersion(out Version copriVersion) 
                    ? new Version(0,0)
                    : copriVersion);

        /// <summary> Gets account object from login response.</summary>
        /// <param name="merchantId">Needed to extract cookie from autorization response.</param>
        /// <param name="loginResponse">Response to get session cookie and debug level from.</param>
        /// <param name="mail">Mail address needed to construct a complete account object (is not part of response).</param>
        /// <param name="password">Password needed to construct a complete account object (is not part of response).</param>
        public static IAccount GetAccount(
            this AuthorizationResponse loginResponse,
            string merchantId,
            string mail,
            string password)
        {
            if (loginResponse == null)
            {
                throw new ArgumentNullException(nameof(loginResponse));
            }

            return new Account(
                mail,
                password,
                loginResponse.GetIsAgbAcknowledged(),
                loginResponse.authcookie?.Replace(merchantId, ""),
                loginResponse.GetGroup(),
                loginResponse.debuglevel == 1
                    ? Permissions.All : 
                    (Permissions)loginResponse.debuglevel) ;
        }

        /// <summary> Load bike object from booking response. </summary>
        /// <param name="bike">Bike object to load from response.</param>
        /// <param name="bikeInfo">Booking response.</param>
        /// <param name="mailAddress">Mail address of user which books bike.</param>
        /// <param name="p_strSessionCookie">Session cookie of user which books bike.</param>
        /// <param name="notifyLevel">Controls whether notify property changed events are fired or not.</param>
        public static void Load(
            this IBikeInfoMutable bike,
            BikeInfoReservedOrBooked bikeInfo,
            string mailAddress,
            Func<DateTime> dateTimeProvider,
            Bikes.Bike.BC.NotifyPropertyChangedLevel notifyLevel = Bikes.Bike.BC.NotifyPropertyChangedLevel.All)
        {

            var l_oDateTimeProvider = dateTimeProvider != null
                ? dateTimeProvider
                : () => DateTime.Now;

            if (bike is Bike.BluetoothLock.BikeInfoMutable btBikeInfo)
            {
                btBikeInfo.LockInfo.Load(
                    bikeInfo.GetBluetoothLockId(),
                    bikeInfo.GetBluetoothLockGuid(),
                    bikeInfo.GetSeed(),
                    bikeInfo.GetUserKey(),
                    bikeInfo.GetAdminKey());
            }

            var l_oState = bikeInfo.GetState();
            switch (l_oState)
            {
                case InUseStateEnum.Disposable:
                    bike.State.Load(
                        InUseStateEnum.Disposable,
                        notifyLevel: notifyLevel);
                    break;

                case InUseStateEnum.Reserved:
                    bike.State.Load(
                        InUseStateEnum.Reserved,
                        bikeInfo.GetFrom(),
                        mailAddress,
                        bikeInfo.timeCode,
                        notifyLevel);
                    break;

                case InUseStateEnum.Booked:
                    bike.State.Load(
                        InUseStateEnum.Booked,
                        bikeInfo.GetFrom(),
                        mailAddress,
                        bikeInfo.timeCode, 
                        notifyLevel);
                    break;

                default:
                    throw new Exception(string.Format("Unexpected bike state detected. state is {0}.", l_oState));
            }
        }

        /// <summary> Gets bikes available from copri server response.</summary>
        /// <param name="bikesAvailableResponse">Response to create collection from.</param>
        /// <returns>New collection of available bikes.</returns>
        public static BikeCollection GetBikesAvailable(
            this BikesAvailableResponse bikesAvailableResponse)
        {
            return GetBikesAll(
                bikesAvailableResponse,
                new BikesReservedOccupiedResponse(),    // There are no occupied bikes.
                string.Empty,
                () => DateTime.Now);
        }

        /// <summary> Gets bikes occupied from copri server response. </summary>
        /// <param name="p_oBikesAvailable">Response to create bikes from.</param>
        /// <returns>New collection of occupied bikes.</returns>
        public static BikeCollection GetBikesOccupied(
            this BikesReservedOccupiedResponse bikesOccupiedResponse,
            string mail,
            Func<DateTime> dateTimeProvider)
        {
            return GetBikesAll(
                new BikesAvailableResponse(),
                bikesOccupiedResponse,
                mail,
                dateTimeProvider);
        }

        /// <summary> Gets bikes occupied from copri server response. </summary>
        /// <param name="p_oBikesAvailable">Response to create bikes from.</param>
        /// <returns>New collection of occupied bikes.</returns>
        public static BikeCollection GetBikesAll(
            BikesAvailableResponse bikesAvailableResponse,
            BikesReservedOccupiedResponse bikesOccupiedResponse,
            string mail,
            Func<DateTime> dateTimeProvider)
        {
            var bikesDictionary = new Dictionary<string, BikeInfo>();
            var duplicates = new Dictionary<string, BikeInfo>();

            // Get bikes from Copri/ file/ memory, ....
            if (bikesAvailableResponse != null
                && bikesAvailableResponse.bikes != null)
            {
                foreach (var bikeInfoResponse in bikesAvailableResponse.bikes.Values)
                {
                    var bikeInfo = BikeInfoFactory.Create(bikeInfoResponse);
                    if (bikeInfo == null)
                    {
                        // Response is not valid.
                        continue;
                    }

                    if (bikesDictionary.ContainsKey(bikeInfo.Id))
                    {
                        // Duplicates are not allowed.
                        Log.Error($"Duplicate bike with id {bikeInfo.Id} detected evaluating bikes available. Bike status is {bikeInfo.State.Value}.");

                        if (!duplicates.ContainsKey(bikeInfo.Id))
                        {
                            duplicates.Add(bikeInfo.Id, bikeInfo);
                        }

                        continue;
                    }

                    bikesDictionary.Add(bikeInfo.Id, bikeInfo);
                }
            }

            // Get bikes from Copri/ file/ memory, ....
            if (bikesOccupiedResponse != null
                && bikesOccupiedResponse.bikes_occupied != null)
            {
                foreach (var bikeInfoResponse in bikesOccupiedResponse.bikes_occupied.Values)
                {
                    BikeInfo bikeInfo = BikeInfoFactory.Create(
                        bikeInfoResponse,
                        mail,
                        dateTimeProvider);

                    if (bikeInfo == null)
                    {
                        continue;
                    }

                    if (bikesDictionary.ContainsKey(bikeInfo.Id))
                    {
                        // Duplicates are not allowed.
                        Log.Error($"Duplicate bike with id {bikeInfo.Id} detected evaluating bikes occupied. Bike status is {bikeInfo.State.Value}.");
                        if (!duplicates.ContainsKey(bikeInfo.Id))
                        {
                            duplicates.Add(bikeInfo.Id, bikeInfo);
                        }

                        continue;
                    }


                    bikesDictionary.Add(bikeInfo.Id, bikeInfo);
                }
            }

            // Remove entries which are not unique.
            foreach (var l_oDuplicate in duplicates)
            {
                bikesDictionary.Remove(l_oDuplicate.Key);
            }

            return new BikeCollection(bikesDictionary);
        }
    }


    /// <summary>
    /// Constructs bike info instances/ bike info derived instances.
    /// </summary>
    public static class BikeInfoFactory
    {
        public static BikeInfo Create(BikeInfoAvailable bikeInfo)
        {
            if (bikeInfo.GetIsManualLockBike())
            {
                // Manual lock bikes are no more supported.
                Log.Error(
                    $"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. " +
                    "Manual lock bikes are no more supported." +
                    $"Bike number: {bikeInfo.bike}{(bikeInfo.station != null ? $"station number {bikeInfo.station}" : string.Empty)}."
                    );
                return null;
            }

            switch (bikeInfo.GetState())
            {
                case InUseStateEnum.Disposable:
                    break;

                default:
                    Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. Unexpected state {bikeInfo.GetState()} detected.");
                    return null;
            }

            if (string.IsNullOrEmpty(bikeInfo.station))
            {
                // Bike available must always have a station id because bikes can only be returned at a station.
                Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. No station info set.");
                return null;
            }

            try
            {
                return !bikeInfo.GetIsBluetoothLockBike()
                    ? new BikeInfo(
                        bikeInfo.bike,
                        bikeInfo.station,
                        bikeInfo.GetOperatorUri(),
#if !NOTARIFFDESCRIPTION
                        Create(bikeInfo.tariff_description),
#else
                        Create((TINK.Repository.Response.TariffDescription) null),
#endif
                        bikeInfo.GetIsDemo(),
                        bikeInfo.GetGroup(),
                        bikeInfo.GetWheelType(),
                        bikeInfo.GetTypeOfBike(),
                        bikeInfo.description)
                    : new Bike.BluetoothLock.BikeInfo(
                        bikeInfo.bike,
                        bikeInfo.GetBluetoothLockId(),
                        bikeInfo.GetBluetoothLockGuid(),
                        bikeInfo.station,
                        bikeInfo.GetOperatorUri(),
#if !NOTARIFFDESCRIPTION
                        Create(bikeInfo.tariff_description),
#else
                        Create((TINK.Repository.Response.TariffDescription)null),
#endif                        
                        bikeInfo.GetIsDemo(),
                        bikeInfo.GetGroup(),
                        bikeInfo.GetWheelType(),
                        bikeInfo.GetTypeOfBike(),
                        bikeInfo.description);

            }
            catch (ArgumentException ex)
            {
                // Contructor reported invalid arguemts (missing lock id, ....).
                Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. Invalid response detected. Available bike with id {bikeInfo.bike} skipped. {ex.Message}");
                return null;
            }
        }

        /// <summary> Creates a bike info object from copri response. </summary>
        /// <param name="bikeInfo">Copri response. </param>
        /// <param name="mailAddress">Mail address of user.</param>
        /// <param name="dateTimeProvider">Date and time provider function.</param>
        /// <returns></returns>
        public static BikeInfo Create(
            BikeInfoReservedOrBooked bikeInfo,
            string mailAddress,
            Func<DateTime> dateTimeProvider)
        {
            if (bikeInfo.GetIsManualLockBike())
            {
                // Manual lock bikes are no more supported.
                Log.Error(
                    $"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. " +
                    "Manual lock bikes are no more supported." +
                    $"Bike number: {bikeInfo.bike}{(bikeInfo.station != null ? $", station number {bikeInfo.station}" : string.Empty)}."
                    );
                return null;
            }

            // Check if bike is a bluetooth lock bike.
            var isBluetoothBike = bikeInfo.GetIsBluetoothLockBike();
            int lockSerial = bikeInfo.GetBluetoothLockId();
            Guid lockGuid = bikeInfo.GetBluetoothLockGuid();

            switch (bikeInfo.GetState())
            {
                case InUseStateEnum.Reserved:
                    try
                    {
                        return !isBluetoothBike
                            ? new BikeInfo(
                                bikeInfo.bike,
                                bikeInfo.GetIsDemo(),
                                bikeInfo.GetGroup(),
                                bikeInfo.GetWheelType(),
                                bikeInfo.GetTypeOfBike(),
                                bikeInfo.description,
                                bikeInfo.station,
                                bikeInfo.GetOperatorUri(),

#if !NOTARIFFDESCRIPTION
                                Create(bikeInfo.tariff_description),
#else
                                Create((TINK.Repository.Response.TariffDescription)null),
#endif                                
                                bikeInfo.GetFrom(),
                                mailAddress,
                                bikeInfo.timeCode,
                                dateTimeProvider)
                            : new Bike.BluetoothLock.BikeInfo(
                                bikeInfo.bike,
                                lockSerial,
                                lockGuid,
                                bikeInfo.GetUserKey(),
                                bikeInfo.GetAdminKey(),
                                bikeInfo.GetSeed(),
                                bikeInfo.GetFrom(),
                                mailAddress,
                                bikeInfo.station,
                                bikeInfo.GetOperatorUri(),
#if !NOTARIFFDESCRIPTION
                                Create(bikeInfo.tariff_description),
#else
                                Create((TINK.Repository.Response.TariffDescription)null),
#endif                                
                                dateTimeProvider,
                                bikeInfo.GetIsDemo(),
                                bikeInfo.GetGroup(),
                                bikeInfo.GetWheelType(),
                                bikeInfo.GetTypeOfBike(),
                                bikeInfo.description);
                    }
                    catch (ArgumentException ex)
                    {
                        // Contructor reported invalid arguemts (missing lock id, ....).
                        Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoReservedOrBooked)} argument. Invalid response detected. Reserved bike with id {bikeInfo.bike} skipped. {ex.Message}");
                        return null;
                    }

                case InUseStateEnum.Booked:
                    try
                    {
                        return !isBluetoothBike
                            ? new BikeInfo(
                                bikeInfo.bike,
                                bikeInfo.GetIsDemo(),
                                bikeInfo.GetGroup(),
                                bikeInfo.GetWheelType(),
                                bikeInfo.GetTypeOfBike(),
                                bikeInfo.description,
                                bikeInfo.station,
                                bikeInfo.GetOperatorUri(),
#if !NOTARIFFDESCRIPTION
                                Create(bikeInfo.tariff_description),
#else
                                Create((TINK.Repository.Response.TariffDescription)null),
#endif                                
                                bikeInfo.GetFrom(),
                                mailAddress,
                                bikeInfo.timeCode)
                            : new Bike.BluetoothLock.BikeInfo(
                                bikeInfo.bike,
                                lockSerial,
                                bikeInfo.GetBluetoothLockGuid(),
                                bikeInfo.GetUserKey(),
                                bikeInfo.GetAdminKey(),
                                bikeInfo.GetSeed(),
                                bikeInfo.GetFrom(),
                                mailAddress,
                                bikeInfo.station,
                                bikeInfo.GetOperatorUri(),
#if !NOTARIFFDESCRIPTION
                                Create(bikeInfo.tariff_description),
#else
                                Create((TINK.Repository.Response.TariffDescription)null),
#endif                             
                                bikeInfo.GetIsDemo(),
                                bikeInfo.GetGroup(),
                                bikeInfo.GetWheelType(),
                                bikeInfo.GetTypeOfBike(),
                                bikeInfo.description);
                    }
                    catch (ArgumentException ex)
                    {
                        // Contructor reported invalid arguemts (missing lock id, ....).
                        Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoReservedOrBooked)} argument. Invalid response detected. Booked bike with id {bikeInfo.bike} skipped. {ex.Message}");
                        return null;
                    }

                default:
                    Log.Error($"Can not create new {nameof(BikeInfo)}-object from {nameof(BikeInfoAvailable)} argument. Unexpected state {bikeInfo.GetState()} detected.");
                    return null;
            }
        }

        public static Bikes.Bike.TariffDescription Create(this TariffDescription tariffDesciption)
        {
            return new Bikes.Bike.TariffDescription
            {
                Name = tariffDesciption?.name,
#if USCSHARP9
                Number = int.TryParse(tariffDesciption?.number, out int number) ? number : null,
#else
                Number = int.TryParse(tariffDesciption?.number, out int number) ? number : (int?) null,
#endif
                FreeTimePerSession = double.TryParse(tariffDesciption?.free_hours, NumberStyles.Any, CultureInfo.InvariantCulture, out double freeHours) ? TimeSpan.FromHours(freeHours) : TimeSpan.Zero,
                FeeEuroPerHour = double.TryParse(tariffDesciption?.eur_per_hour, NumberStyles.Any, CultureInfo.InvariantCulture, out double euroPerHour) ? euroPerHour : double.NaN,
                AboEuroPerMonth = double.TryParse(tariffDesciption?.abo_eur_per_month, NumberStyles.Any, CultureInfo.InvariantCulture, out double aboEuroPerMonth) ? aboEuroPerMonth : double.NaN,
                MaxFeeEuroPerDay = double.TryParse(tariffDesciption?.max_eur_per_day, NumberStyles.Any, CultureInfo.InvariantCulture, out double maxEuroPerDay) ? maxEuroPerDay : double.NaN,
                OperatorAgb = tariffDesciption?.operator_agb,
                TrackingInfo = tariffDesciption?.track_info
            };
        }

        /// <summary> Creates a booking finished object from response.</summary>
        /// <param name="response">Response to create survey object from.</param>
        public static BookingFinishedModel Create(this DoReturnResponse response)
        {
            var bookingFinished = new BookingFinishedModel
            {
                Co2Saving = response?.co2saving
            };

            if (response?.user_miniquery == null)

            {
                return bookingFinished;
            }

            var miniquery = response.user_miniquery;
            bookingFinished.MiniSurvey = new MiniSurveyModel
                {
                    Title = miniquery.title,
                    Subtitle = miniquery.subtitle,
                    Footer = miniquery.footer
                };

            foreach (var question in miniquery?.questions?.OrderBy(x => x.Key) ?? new Dictionary<string, MiniSurveyResponse.Question>().OrderBy(x => x.Key))
            {
                if (string.IsNullOrEmpty(question.Key.Trim())
                    || question.Value.query == null)
                {
                    // Skip invalid entries.
                    continue;
                }

                bookingFinished.MiniSurvey.Questions.Add(
                    question.Key,
                    new MiniSurveyModel.QuestionModel());
            }

            return bookingFinished;
        }
    }
}