using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using Serilog;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Device;
using TINK.Model.Logging;
using TINK.Repository.Exception;
using TINK.Repository.Request;
using TINK.Repository.Response;

namespace TINK.Repository
{
	/// <summary> Object which manages calls to copri. </summary>
	public class CopriCallsHttps : ICopriServer
	{
		/// <summary> Builds requests.</summary>
		private IRequestBuilder requestBuilder;

		/// <summary> Initializes a instance of the copri calls https object. </summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="appContextInfo">Provides app related info (app name and version, merchantid) to pass to COPRI.</param>
		/// <param name="uiIsoLangugageName">Two letter ISO language name.</param>
		/// <param name="sessionCookie">Session cookie if user is logged in, null otherwise.</param>
		public CopriCallsHttps(
			Uri copriHost,
			AppContextInfo appContextInfo,
			string uiIsoLangugageName,
			string sessionCookie = null)
		{
			m_oCopriHost = copriHost
				?? throw new System.Exception($"Can not construct {GetType()}- object. Uri of copri host must not be null.");

			UserAgent = appContextInfo != null
				? appContextInfo.UserAgent
				: throw new System.Exception($"Can not construct {GetType()}- object. User agent must not be null or empty.");

			requestBuilder = string.IsNullOrEmpty(sessionCookie)
				? new RequestBuilder(appContextInfo.MerchantId, uiIsoLangugageName) as IRequestBuilder
				: new RequestBuilderLoggedIn(appContextInfo.MerchantId, uiIsoLangugageName, sessionCookie);
		}

		/// <summary> Holds the URL for rest calls.</summary>
		private Uri m_oCopriHost;

		/// <summary> Spacifies name and version of app. </summary>
		private string UserAgent { get; }

		/// <summary> Returns true because value requested form copri server are returned. </summary>
		public bool IsConnected => true;

		/// <summary> Gets the merchant id.</summary>
		public string MerchantId => requestBuilder.MerchantId;

		/// <summary> Gets the session cookie if user is logged in, an empty string otherwise. </summary>
		public string SessionCookie => requestBuilder.SessionCookie;

		/// <summary> Logs user in. </summary>
		/// <param name="mailAddress">Mailaddress of user to log in.</param>
		/// <param name="password">Password to log in.</param>
		/// <param name="deviceId">Id specifying user and hardware.</param>
		/// <remarks>Response which holds auth cookie <see cref="ResponseBase.authcookie"/></remarks>
		public async Task<AuthorizationResponse> DoAuthorizationAsync(
			string mailAddress,
			string password,
			string deviceId)
			=> await DoAuthorizationAsync(
				m_oCopriHost.AbsoluteUri,
				requestBuilder.DoAuthorization(mailAddress, password, deviceId),
				() => requestBuilder.DoAuthorization(mailAddress, "********", deviceId),
				UserAgent);

		/// <summary> Logs user out. </summary>
		/// <remarks>Response which holds auth cookie <see cref="ResponseBase.authcookie"/></remarks>
		public async Task<AuthorizationoutResponse> DoAuthoutAsync()
			=> await DoAuthoutAsync(m_oCopriHost.AbsoluteUri, requestBuilder.DoAuthout(), UserAgent);

		/// <summary>Gets bikes available.</summary>
		/// <returns>Response holding list of bikes.</returns>
		public async Task<BikesAvailableResponse> GetBikesAvailableAsync()
			=> await GetBikesAvailableAsync(m_oCopriHost.AbsoluteUri, requestBuilder.GetBikesAvailable(), UserAgent);

		/// <summary> Gets a list of bikes reserved/ booked by acctive user. </summary>
		/// <returns>Response holding list of bikes.</returns>
		public async Task<BikesReservedOccupiedResponse> GetBikesOccupiedAsync()
		{
			try
			{
				return await GetBikesOccupiedAsync(m_oCopriHost.AbsoluteUri, requestBuilder.GetBikesOccupied(), UserAgent);
			}
			catch (NotSupportedException)
			{
				// No user logged in.
				await Task.CompletedTask;
				return ResponseHelper.GetBikesOccupiedNone();
			}
		}

		/// <summary> Get list of stations. </summary>
		/// <returns>List of files.</returns>
		public async Task<StationsAvailableResponse> GetStationsAsync()
			=> await GetStationsAsync(m_oCopriHost.AbsoluteUri, requestBuilder.GetStations(), UserAgent);

		/// <summary> Get authentication keys. </summary>
		/// <param name="bikeId">Id of the bike to get keys for.</param>
		/// <returns>Response holding authentication keys.</returns>
		public async Task<ReservationBookingResponse> GetAuthKeys(string bikeId)
			=> await GetAuthKeysAsync(m_oCopriHost.AbsoluteUri, requestBuilder.CalculateAuthParameters(bikeId), UserAgent);


		/// <summary> Gets booking request response.</summary>
		/// <param name="bikeId">Id of the bike to book.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Booking response.</returns>
		public async Task<ReservationBookingResponse> DoReserveAsync(
			string bikeId,
			Uri operatorUri)
			=> await DoReserveAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.DoReserve(bikeId),
				UserAgent);

		/// <summary> Gets canel booking request response.</summary>
		/// <param name="bikeId">Id of the bike to book.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on cancel booking request.</returns>
		public async Task<ReservationCancelReturnResponse> DoCancelReservationAsync(
			string bikeId,
			Uri operatorUri)
			=> await DoCancelReservationAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.DoCancelReservation(bikeId),
				UserAgent);

		/// <summary> Get authentication keys. </summary>
		/// <param name="bikeId">Id of the bike to get keys for.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response holding authentication keys.</returns>
		public async Task<ReservationBookingResponse> CalculateAuthKeysAsync(
			string bikeId,
			Uri operatorUri)
			=> await GetAuthKeysAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.CalculateAuthParameters(bikeId),
				UserAgent);

		/// <summary> Notifies COPRI about start of returning sequence. </summary>
		/// <remarks> Operator specific call.</remarks>
		/// <param name="bikeId">Id of the bike to return.</param>+
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on notification about start of returning sequence.</returns>
		public async Task<ResponseBase> StartReturningBike(
			string bikeId,
			Uri operatorUri)
			=> await DoStartReturningBike(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.StartReturningBike(bikeId),
				UserAgent);

		/// <summary> Updates lock state for a booked bike. </summary>
		/// <param name="bikeId">Id of the bike to update locking state for.</param>
		/// <param name="location">Geolocation of lock.</param>
		/// <param name="state">New locking state.</param>
		/// <param name="batteryPercentage">Holds the filling level percentage of the battery.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on updating locking state.</returns>
		public async Task<ReservationBookingResponse> UpdateLockingStateAsync(
			string bikeId,
			lock_state state,
			Uri operatorUri,
			LocationDto location,
			double batteryLevel,
			IVersionInfo versionInfo) =>
				await DoUpdateLockingStateAsync(
					operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
					requestBuilder.UpateLockingState(bikeId, state, location, batteryLevel, versionInfo),
					UserAgent);

		/// <summary> Gets booking request request. </summary>
		/// <param name="bikeId">Id of the bike to book.</param>
		/// <param name="guid">Used to publish GUID from app to copri. Used for initial setup of bike in copri.</param>
		/// <param name="batteryPercentage">Holds the filling level percentage of the battery.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Requst on booking request.</returns>
		public async Task<ReservationBookingResponse> DoBookAsync(
			string bikeId,
			Guid guid,
			double batteryPercentage,
			Uri operatorUri)
			=> await DoBookAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.DoBook(bikeId, guid, batteryPercentage),
				UserAgent);

		/// <summary> Books a bike and starts opening bike. </summary>
		/// <param name="bikeId">Id of the bike to book.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on booking request.</returns>
		public async Task<ReservationBookingResponse> BookAvailableAndStartOpeningAsync(
			string bikeId,
			Uri operatorUri)
			=> await DoBookAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.BookAvailableAndStartOpening(bikeId),
				UserAgent);

		/// <summary> Books a bike and starts opening bike. </summary>
		/// <param name="bikeId">Id of the bike to book.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on booking request.</returns>
		public async Task<ReservationBookingResponse> BookReservedAndStartOpeningAsync(
			string bikeId,
			Uri operatorUri)
			=> await DoBookAsync(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.BookReservedAndStartOpening(bikeId),
				UserAgent);

		/// <summary> Returns a bike. </summary>
		/// <param name="bikeId">Id of the bike to return.</param>
		/// <param name="location">Geolocation of lock.</param>
		/// <param name="smartDevice">Provides info about hard and software.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on returning request.</returns>
		public async Task<DoReturnResponse> DoReturn(
			string bikeId,
			LocationDto location,
			ISmartDevice smartDevice,
			Uri operatorUri)
			=> await DoReturn(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.DoReturn(bikeId, location, smartDevice),
				UserAgent);

		/// <summary> Returns a bike and starts closing. </summary>
		/// <param name="bikeId">Id of the bike to return.</param>
		/// <param name="smartDevice">Provides info about hard and software.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on returning request.</returns>
		public async Task<DoReturnResponse> ReturnAndStartClosingAsync(
			string bikeId,
			ISmartDevice smartDevice,
			Uri operatorUri)
			=> await DoReturn(
				operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
				requestBuilder.ReturnAndStartClosing(bikeId, smartDevice),
				UserAgent);

		/// <summary> Submits feedback to copri server. </summary>
		/// <param name="bikeId">Id of the bike to which the feedback is related to.</param>
		/// <param name="currentChargeBars">Null if bike has no engine or charge is unknown. Otherwise the charge filling level of the drive battery.</param>
		/// <param name="isBikeBroken">True if bike is broken.</param>
		/// <param name="message">General purpose message or error description.</param>
		/// <param name="operatorUri">Holds the uri of the operator or null, in case of single operator setup.</param>
		/// <returns>Response on submitting feedback request.</returns>
		public async Task<SubmitFeedbackResponse> DoSubmitFeedback(
			string bikeId,
			int? currentChargeBars,
			string message,
			bool isBikeBroken,
			Uri operatorUri) =>
				await DoSubmitFeedback(
					operatorUri?.AbsoluteUri ?? m_oCopriHost.AbsoluteUri,
					requestBuilder.DoSubmitFeedback(bikeId, currentChargeBars, message, isBikeBroken),
					UserAgent);

		/// <summary> Submits mini survey to copri server. </summary>
		/// <param name="answers">Collection of answers.</param>
		public Task<ResponseBase> DoSubmitMiniSurvey(IDictionary<string, string> answers)
			=> DoSubmitMiniSurvey(
					m_oCopriHost.AbsoluteUri,
					requestBuilder.DoSubmitMiniSurvey(answers),
					UserAgent);

		/// <summary> Logs user in. </summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="command">Command to log user in.</param>
		/// <remarks>Response which holds auth cookie <see cref="ResponseBase.authcookie"/></remarks>
		public static async Task<AuthorizationResponse> DoAuthorizationAsync(
			string copriHost,
			string command,
			Func<string> displayCommand,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			/// Extract session cookie from response.
			string response = string.Empty;
			try
			{
				response = await PostAsync(
					copriHost,
					command,
					userAgent,
					displayCommand); // Do not include password into exception output when an error occurres.
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Login fehlgeschlagen aufgrund eines Netzwerkfehlers.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Login fehlgeschlagen aufgrund eines Netzwerkfehlers.", l_oException);
				}

				throw;
			}

			return CopriCallsStatic.DeserializeResponse<AuthorizationResponse>(response, (version) => new UnsupportedCopriVersionDetectedException());
#else
            return null;
#endif
		}

		/// <summary> Logs user out. </summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="command">Command to log user out.</param>
		public static async Task<AuthorizationoutResponse> DoAuthoutAsync(
			string p_strCopriHost,
			string p_oCommand,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string l_oLogoutResponse;
			try
			{
				l_oLogoutResponse = await PostAsync(p_strCopriHost, p_oCommand, userAgent);
			}

			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Login fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Login fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				throw;
			}

			/// Extract session cookie from response.
			return CopriCallsStatic.DeserializeResponse<AuthorizationoutResponse>(l_oLogoutResponse, (version) => new UnsupportedCopriVersionDetectedException());
#else
            return null;
#endif
		}

		/// <summary>
		/// Get list of stations from file.
		/// </summary>
		/// <param name="p_strCopriHost">URL of the copri host to connect to.</param>
		/// <param name="p_oCommand">Command to get stations.</param>
		/// <returns>List of files.</returns>
		public static async Task<StationsAvailableResponse> GetStationsAsync(
		string p_strCopriHost,
		string p_oCommand,
		string userAgent = null)
		{
#if !WINDOWS_UWP
			string response;
			try
			{
				response = await PostAsync(p_strCopriHost, p_oCommand, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Abfage der verfügbaren Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Abfage der verfügbaren Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return CopriCallsStatic.DeserializeResponse(
				response,
				(version) => CopriCallsMonkeyStore.GetEmptyStationsAllResponse(version));
#else
            return null;
#endif
		}

		/// <summary> Gets a list of bikes from Copri. </summary>
		/// <param name="copriHost">URL of the copri host to connect to.</param>
		/// <param name="p_oCommand">Command to get bikes.</param>
		/// <returns>Response holding list of bikes.</returns>
		public static async Task<BikesAvailableResponse> GetBikesAvailableAsync(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string response;
			try
			{
				response = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Abfage der verfügbaren Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Abfage der verfügbaren Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return CopriCallsStatic.DeserializeResponse(
				response,
				(version) => CopriCallsMonkeyStore.GetEmptyBikesAvailableResponse(version));

#else
            return null;
#endif
		}

		/// <summary> Gets a list of bikes reserved/ booked by acctive user from Copri.</summary>
		/// <param name="p_strCopriHost">URL of the copri host to connect to.</param>
		/// <param name="p_oCommand">Command to post.</param>
		/// <returns>Response holding list of bikes.</returns>
		public static async Task<BikesReservedOccupiedResponse> GetBikesOccupiedAsync(
			string p_strCopriHost,
			string p_oCommand,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string response;
			try
			{
				response = await PostAsync(p_strCopriHost, p_oCommand, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Abfage der reservierten/ gebuchten Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Abfage der reservierten/ gebuchten Räder fehlgeschlagen wegen Netzwerkfehler.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return CopriCallsStatic.DeserializeResponse(
				response,
				(version) => CopriCallsMonkeyStore.GetEmptyBikesReservedOccupiedResponse(version));
#else
            return null;
#endif
		}

		/// <summary> Get auth keys from COPRI. </summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="command">Command to log user in.</param>
		/// <returns>Response on booking request.</returns>
		public static async Task<ReservationBookingResponse> GetAuthKeysAsync(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string bikesAvaialbeResponse;
			try
			{
				bikesAvaialbeResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception exception)
			{
				if (exception.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Schlosssuche wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				if (exception.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Schlosssuche wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ReservationBookingResponse>>(bikesAvaialbeResponse)?.shareejson;
#else
            return null;
#endif
		}
		/// <summary> Gets booking request response. </summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="command">Command to log user in.</param>
		/// <returns>Response on booking request.</returns>
		public static async Task<ReservationBookingResponse> DoReserveAsync(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string bikesAvaialbeResponse;
			try
			{
				bikesAvaialbeResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception exception)
			{
				if (exception.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Reservierung des Fahrrads wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				if (exception.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Reservierung des Fahrrads wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ReservationBookingResponse>>(bikesAvaialbeResponse)?.shareejson;
#else
            return null;
#endif
		}

		/// <summary> Gets canel booking request response.</summary>
		/// <param name="copriHost">Host to connect to. </param>
		/// <param name="command">Command to log user in.</param>
		/// <returns>Response on cancel booking request.</returns>
		public static async Task<ReservationCancelReturnResponse> DoCancelReservationAsync(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string l_oBikesAvaialbeResponse;
			try
			{
				l_oBikesAvaialbeResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Reservierung des Fahrrads aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Reservierung des Fahrrads aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ReservationCancelReturnResponse>>(l_oBikesAvaialbeResponse)?.shareejson;
#else
            return null;
#endif
		}

		public static async Task<ResponseBase> DoStartReturningBike(
			string copriHost,
			string command,
			string agent = null)
		{
#if !WINDOWS_UWP
			string response;
			try
			{
				response = await PostAsync(copriHost, command, agent);
			}
			catch (System.Exception exception)
			{
				if (exception.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Benachrichtigung von Start der Rückgabe wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				if (exception.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Benachrichtigung von Start der Rückgabe wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ResponseBase>>(response)?.shareejson;
#else
            return null;
#endif
		}

		public static async Task<ReservationBookingResponse> DoUpdateLockingStateAsync(
			string copriHost,
			string command,
			string agent = null)
		{
#if !WINDOWS_UWP
			string bikesAvaialbeResponse;
			try
			{
				bikesAvaialbeResponse = await PostAsync(copriHost, command, agent);
			}
			catch (System.Exception exception)
			{
				if (exception.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Aktualisierung des Schlossstatuses wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				if (exception.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Aktualisierung des Schlossstatuses wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ReservationBookingResponse>>(bikesAvaialbeResponse)?.shareejson;
#else
            return null;
#endif
		}

		public static async Task<ReservationBookingResponse> DoBookAsync(
			string copriHost,
			string command,
			string agent = null)
		{
#if !WINDOWS_UWP
			string bikesAvaialbeResponse;
			try
			{
				bikesAvaialbeResponse = await PostAsync(copriHost, command, agent);
			}
			catch (System.Exception exception)
			{
				if (exception.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Buchung des Fahrrads wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				if (exception.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Buchung des Fahrrads wegen Netzwerkfehler fehlgeschlagen.", exception);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ReservationBookingResponse>>(bikesAvaialbeResponse)?.shareejson;
#else
            return null;
#endif
		}

		public static async Task<DoReturnResponse> DoReturn(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string doReturnResponse;
			try
			{
				doReturnResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Rückgabe des Fahrrads aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Rückgabe des Fahrrads aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<DoReturnResponse>>(doReturnResponse)?.shareejson;
#else
            return null;
#endif
		}

		public async Task<SubmitFeedbackResponse> DoSubmitFeedback(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string userFeedbackResponse;
			try
			{
				userFeedbackResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Senden der Rückmeldung aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Senden der Rückmeldung aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<SubmitFeedbackResponse>>(userFeedbackResponse)?.shareejson;
#else
            return null;
#endif
		}

		/// <summary> Submits mini survey to copri server. </summary>
		public async Task<ResponseBase> DoSubmitMiniSurvey(
			string copriHost,
			string command,
			string userAgent = null)
		{
#if !WINDOWS_UWP
			string miniSurveyResponse;
			try
			{
				miniSurveyResponse = await PostAsync(copriHost, command, userAgent);
			}
			catch (System.Exception l_oException)
			{
				if (l_oException.GetIsConnectFailureException())
				{
					throw new WebConnectFailureException("Senden der Miniumfrage aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				if (l_oException.GetIsForbiddenException())
				{
					throw new WebForbiddenException("Senden der der Miniumfrage aufgrund eines Netzwerkfehlers fehlgeschlagen.", l_oException);
				}

				throw;
			}

			// Extract bikes from response.
			return JsonConvertRethrow.DeserializeObject<ResponseContainer<ResponseBase>>(miniSurveyResponse)?.shareejson;
#else
            return null;
#endif
		}

		/// <summary> http get- request.</summary>
		/// <param name="Url">Ulr to get info from.</param>
		/// <returns>response from server</returns>
		public static async Task<string> Get(string Url)
		{
			string result = string.Empty;
			HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(Url);
			myRequest.Method = "GET";
			using (var myResponse = await myRequest.GetResponseAsync())
			{
				using (var sr = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8))
				{
					result = sr.ReadToEnd();
				}
			}

			return result;
		}

		/// <summary> http- post request.</summary>
		/// <param name="command">Command to send.</param>
		/// <param name="displayCommand">Command to display/ log used for error handling.</param>
		/// <param name="uRL">Address of server to communicate with.</param>
		/// <returns>Response as text.</returns>
		/// <changelog> An unused member PostAsyncHttpClient using HttpClient for posting was removed 2020-04-02.</changelog>
		private static async Task<string> PostAsync(
			string uRL,
			string command,
			string userAgent = null,
			Func<string> displayCommand = null)
		{
			if (string.IsNullOrEmpty(command))
			{
				Log.ForContext<CopriCallsHttps>().Fatal("Can not post command. Command must not be null or empty.");

				throw new ArgumentException("Can not post command. Command must not be null or empty.");
			}

			if (string.IsNullOrEmpty(uRL))
			{
				Log.ForContext<CopriCallsHttps>().Fatal("Can not post command. Host must not be null or empty.");

				throw new ArgumentException("Can not post command. Host must not be null or empty.");
			}

			// Get display version of command to used for display/ logging (password should never be included in output)
			Func<string> displayCommandFunc = displayCommand ?? delegate () { return command; };

			try
			{
#if !WINDOWS_UWP
				var l_strHost = uRL;

				// Returns a http request.
				var request = WebRequest.CreateHttp(l_strHost);

				request.Method = "POST";
				request.ContentType = "application/x-www-form-urlencoded";
				request.UserAgent = userAgent;

				// Workaround for issue https://bugzilla.xamarin.com/show_bug.cgi?id=57705  
				// If not KeepAlive is set to true Stream.Write leads arbitrarily to an object disposed exception.
				request.KeepAlive = true;

				byte[] postData = Encoding.UTF8.GetBytes(command);

				request.ContentLength = postData.Length;

				// Get the request stream.
				using (Stream dataStream = await request.GetRequestStreamAsync())
				{
					// Write the data to the request stream.
					await dataStream.WriteAsync(postData, 0, postData.Length);
				}

				// Get the response.
				var webResponse = await request.GetResponseAsync() as HttpWebResponse;

				if (webResponse == null)
				{
					throw new System.Exception(string.Format("Reserve request failed. Response form from server was not of expected type."));
				}

				if (webResponse.StatusCode != HttpStatusCode.OK)
				{
					throw new CommunicationException(string.Format(
						"Posting request {0} failed. Expected status code is {1} but was {2}.",
						displayCommandFunc(),
						HttpStatusCode.OK,
						webResponse.StatusCode));
				}

				string response = string.Empty;

				// Get the request stream.
				using (Stream l_oDataStream = webResponse.GetResponseStream())
				using (StreamReader l_oReader = new StreamReader(l_oDataStream))
				{
					// Read the content.
					response = l_oReader.ReadToEnd();

					// Display the content.
					Console.WriteLine(response);

					// Clean up the streams.
					webResponse.Close();
				}

				Log.ForContext<CopriCallsHttps>().Verbose("Post command {DisplayCommand} to host {URL} received {ResponseText:j}.", displayCommandFunc(), uRL, response);

				return response;
#else
                return null;
#endif
			}
			catch (System.Exception exception)
			{
				Log.ForContext<CopriCallsHttps>().InformationOrError("Posting command {DisplayCommand} to host {URL} failed. {Exception}.", displayCommandFunc(), uRL, exception);
				throw;
			}
		}
	}
}