/*
 * Copyright 2016 Game Server Services, Inc. or its affiliates. All Rights
 * Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
#if UNITY_2017_1_OR_NEWER
using UnityEngine.Events;
using UnityEngine.Networking;
    #if GS2_ENABLE_UNITASK
using Cysharp.Threading.Tasks;
    #endif
#else
using System.Web;
using System.Net.Http;
using System.Threading.Tasks;
#endif

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Gs2.Core;
using Gs2.Core.Model;
using Gs2.Core.Net;
using Gs2.Gs2Realtime.Request;
using Gs2.Gs2Realtime.Result;
using Gs2.Util.LitJson;

namespace Gs2.Gs2Realtime
{
	public class Gs2RealtimeRestClient : AbstractGs2Client
	{
#if UNITY_2017_1_OR_NEWER
		private readonly CertificateHandler _certificateHandler;
#endif

		public static string Endpoint = "realtime";

        protected Gs2RestSession Gs2RestSession => (Gs2RestSession) Gs2Session;

		public Gs2RealtimeRestClient(Gs2RestSession Gs2RestSession) : base(Gs2RestSession)
		{

		}

#if UNITY_2017_1_OR_NEWER
		public Gs2RealtimeRestClient(Gs2RestSession gs2RestSession, CertificateHandler certificateHandler) : base(gs2RestSession)
		{
			_certificateHandler = certificateHandler;
		}
#endif


        public class DescribeNamespacesTask : Gs2RestSessionTask<DescribeNamespacesRequest, DescribeNamespacesResult>
        {
            public DescribeNamespacesTask(IGs2Session session, RestSessionRequestFactory factory, DescribeNamespacesRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(DescribeNamespacesRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/";

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.PageToken != null) {
                    sessionRequest.AddQueryString("pageToken", $"{request.PageToken}");
                }
                if (request.Limit != null) {
                    sessionRequest.AddQueryString("limit", $"{request.Limit}");
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator DescribeNamespaces(
                Request.DescribeNamespacesRequest request,
                UnityAction<AsyncResult<Result.DescribeNamespacesResult>> callback
        )
		{
			var task = new DescribeNamespacesTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.DescribeNamespacesResult>(task.Result, task.Error));
        }

		public IFuture<Result.DescribeNamespacesResult> DescribeNamespacesFuture(
                Request.DescribeNamespacesRequest request
        )
		{
			return new DescribeNamespacesTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.DescribeNamespacesResult> DescribeNamespacesAsync(
                Request.DescribeNamespacesRequest request
        )
		{
            AsyncResult<Result.DescribeNamespacesResult> result = null;
			await DescribeNamespaces(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public DescribeNamespacesTask DescribeNamespacesAsync(
                Request.DescribeNamespacesRequest request
        )
		{
			return new DescribeNamespacesTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.DescribeNamespacesResult> DescribeNamespacesAsync(
                Request.DescribeNamespacesRequest request
        )
		{
			var task = new DescribeNamespacesTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class CreateNamespaceTask : Gs2RestSessionTask<CreateNamespaceRequest, CreateNamespaceResult>
        {
            public CreateNamespaceTask(IGs2Session session, RestSessionRequestFactory factory, CreateNamespaceRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(CreateNamespaceRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/";

                var sessionRequest = Factory.Post(url);

                var stringBuilder = new StringBuilder();
                var jsonWriter = new JsonWriter(stringBuilder);
                jsonWriter.WriteObjectStart();
                if (request.Name != null)
                {
                    jsonWriter.WritePropertyName("name");
                    jsonWriter.Write(request.Name);
                }
                if (request.Description != null)
                {
                    jsonWriter.WritePropertyName("description");
                    jsonWriter.Write(request.Description);
                }
                if (request.ServerType != null)
                {
                    jsonWriter.WritePropertyName("serverType");
                    jsonWriter.Write(request.ServerType);
                }
                if (request.ServerSpec != null)
                {
                    jsonWriter.WritePropertyName("serverSpec");
                    jsonWriter.Write(request.ServerSpec);
                }
                if (request.CreateNotification != null)
                {
                    jsonWriter.WritePropertyName("createNotification");
                    request.CreateNotification.WriteJson(jsonWriter);
                }
                if (request.LogSetting != null)
                {
                    jsonWriter.WritePropertyName("logSetting");
                    request.LogSetting.WriteJson(jsonWriter);
                }
                if (request.ContextStack != null)
                {
                    jsonWriter.WritePropertyName("contextStack");
                    jsonWriter.Write(request.ContextStack.ToString());
                }
                jsonWriter.WriteObjectEnd();

                var body = stringBuilder.ToString();
                if (!string.IsNullOrEmpty(body))
                {
                    sessionRequest.Body = body;
                }
                sessionRequest.AddHeader("Content-Type", "application/json");
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator CreateNamespace(
                Request.CreateNamespaceRequest request,
                UnityAction<AsyncResult<Result.CreateNamespaceResult>> callback
        )
		{
			var task = new CreateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.CreateNamespaceResult>(task.Result, task.Error));
        }

		public IFuture<Result.CreateNamespaceResult> CreateNamespaceFuture(
                Request.CreateNamespaceRequest request
        )
		{
			return new CreateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.CreateNamespaceResult> CreateNamespaceAsync(
                Request.CreateNamespaceRequest request
        )
		{
            AsyncResult<Result.CreateNamespaceResult> result = null;
			await CreateNamespace(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public CreateNamespaceTask CreateNamespaceAsync(
                Request.CreateNamespaceRequest request
        )
		{
			return new CreateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.CreateNamespaceResult> CreateNamespaceAsync(
                Request.CreateNamespaceRequest request
        )
		{
			var task = new CreateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class GetNamespaceStatusTask : Gs2RestSessionTask<GetNamespaceStatusRequest, GetNamespaceStatusResult>
        {
            public GetNamespaceStatusTask(IGs2Session session, RestSessionRequestFactory factory, GetNamespaceStatusRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(GetNamespaceStatusRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}/status";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator GetNamespaceStatus(
                Request.GetNamespaceStatusRequest request,
                UnityAction<AsyncResult<Result.GetNamespaceStatusResult>> callback
        )
		{
			var task = new GetNamespaceStatusTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.GetNamespaceStatusResult>(task.Result, task.Error));
        }

		public IFuture<Result.GetNamespaceStatusResult> GetNamespaceStatusFuture(
                Request.GetNamespaceStatusRequest request
        )
		{
			return new GetNamespaceStatusTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.GetNamespaceStatusResult> GetNamespaceStatusAsync(
                Request.GetNamespaceStatusRequest request
        )
		{
            AsyncResult<Result.GetNamespaceStatusResult> result = null;
			await GetNamespaceStatus(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public GetNamespaceStatusTask GetNamespaceStatusAsync(
                Request.GetNamespaceStatusRequest request
        )
		{
			return new GetNamespaceStatusTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.GetNamespaceStatusResult> GetNamespaceStatusAsync(
                Request.GetNamespaceStatusRequest request
        )
		{
			var task = new GetNamespaceStatusTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class GetNamespaceTask : Gs2RestSessionTask<GetNamespaceRequest, GetNamespaceResult>
        {
            public GetNamespaceTask(IGs2Session session, RestSessionRequestFactory factory, GetNamespaceRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(GetNamespaceRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator GetNamespace(
                Request.GetNamespaceRequest request,
                UnityAction<AsyncResult<Result.GetNamespaceResult>> callback
        )
		{
			var task = new GetNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.GetNamespaceResult>(task.Result, task.Error));
        }

		public IFuture<Result.GetNamespaceResult> GetNamespaceFuture(
                Request.GetNamespaceRequest request
        )
		{
			return new GetNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.GetNamespaceResult> GetNamespaceAsync(
                Request.GetNamespaceRequest request
        )
		{
            AsyncResult<Result.GetNamespaceResult> result = null;
			await GetNamespace(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public GetNamespaceTask GetNamespaceAsync(
                Request.GetNamespaceRequest request
        )
		{
			return new GetNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.GetNamespaceResult> GetNamespaceAsync(
                Request.GetNamespaceRequest request
        )
		{
			var task = new GetNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class UpdateNamespaceTask : Gs2RestSessionTask<UpdateNamespaceRequest, UpdateNamespaceResult>
        {
            public UpdateNamespaceTask(IGs2Session session, RestSessionRequestFactory factory, UpdateNamespaceRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(UpdateNamespaceRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Put(url);

                var stringBuilder = new StringBuilder();
                var jsonWriter = new JsonWriter(stringBuilder);
                jsonWriter.WriteObjectStart();
                if (request.Description != null)
                {
                    jsonWriter.WritePropertyName("description");
                    jsonWriter.Write(request.Description);
                }
                if (request.ServerType != null)
                {
                    jsonWriter.WritePropertyName("serverType");
                    jsonWriter.Write(request.ServerType);
                }
                if (request.ServerSpec != null)
                {
                    jsonWriter.WritePropertyName("serverSpec");
                    jsonWriter.Write(request.ServerSpec);
                }
                if (request.CreateNotification != null)
                {
                    jsonWriter.WritePropertyName("createNotification");
                    request.CreateNotification.WriteJson(jsonWriter);
                }
                if (request.LogSetting != null)
                {
                    jsonWriter.WritePropertyName("logSetting");
                    request.LogSetting.WriteJson(jsonWriter);
                }
                if (request.ContextStack != null)
                {
                    jsonWriter.WritePropertyName("contextStack");
                    jsonWriter.Write(request.ContextStack.ToString());
                }
                jsonWriter.WriteObjectEnd();

                var body = stringBuilder.ToString();
                if (!string.IsNullOrEmpty(body))
                {
                    sessionRequest.Body = body;
                }
                sessionRequest.AddHeader("Content-Type", "application/json");
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator UpdateNamespace(
                Request.UpdateNamespaceRequest request,
                UnityAction<AsyncResult<Result.UpdateNamespaceResult>> callback
        )
		{
			var task = new UpdateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.UpdateNamespaceResult>(task.Result, task.Error));
        }

		public IFuture<Result.UpdateNamespaceResult> UpdateNamespaceFuture(
                Request.UpdateNamespaceRequest request
        )
		{
			return new UpdateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.UpdateNamespaceResult> UpdateNamespaceAsync(
                Request.UpdateNamespaceRequest request
        )
		{
            AsyncResult<Result.UpdateNamespaceResult> result = null;
			await UpdateNamespace(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public UpdateNamespaceTask UpdateNamespaceAsync(
                Request.UpdateNamespaceRequest request
        )
		{
			return new UpdateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.UpdateNamespaceResult> UpdateNamespaceAsync(
                Request.UpdateNamespaceRequest request
        )
		{
			var task = new UpdateNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class DeleteNamespaceTask : Gs2RestSessionTask<DeleteNamespaceRequest, DeleteNamespaceResult>
        {
            public DeleteNamespaceTask(IGs2Session session, RestSessionRequestFactory factory, DeleteNamespaceRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(DeleteNamespaceRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Delete(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator DeleteNamespace(
                Request.DeleteNamespaceRequest request,
                UnityAction<AsyncResult<Result.DeleteNamespaceResult>> callback
        )
		{
			var task = new DeleteNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.DeleteNamespaceResult>(task.Result, task.Error));
        }

		public IFuture<Result.DeleteNamespaceResult> DeleteNamespaceFuture(
                Request.DeleteNamespaceRequest request
        )
		{
			return new DeleteNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.DeleteNamespaceResult> DeleteNamespaceAsync(
                Request.DeleteNamespaceRequest request
        )
		{
            AsyncResult<Result.DeleteNamespaceResult> result = null;
			await DeleteNamespace(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public DeleteNamespaceTask DeleteNamespaceAsync(
                Request.DeleteNamespaceRequest request
        )
		{
			return new DeleteNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.DeleteNamespaceResult> DeleteNamespaceAsync(
                Request.DeleteNamespaceRequest request
        )
		{
			var task = new DeleteNamespaceTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class NowTask : Gs2RestSessionTask<NowRequest, NowResult>
        {
            public NowTask(IGs2Session session, RestSessionRequestFactory factory, NowRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(NowRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/now";

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.AccessToken != null)
                {
                    sessionRequest.AddHeader("X-GS2-ACCESS-TOKEN", request.AccessToken);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator Now(
                Request.NowRequest request,
                UnityAction<AsyncResult<Result.NowResult>> callback
        )
		{
			var task = new NowTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.NowResult>(task.Result, task.Error));
        }

		public IFuture<Result.NowResult> NowFuture(
                Request.NowRequest request
        )
		{
			return new NowTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.NowResult> NowAsync(
                Request.NowRequest request
        )
		{
            AsyncResult<Result.NowResult> result = null;
			await Now(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public NowTask NowAsync(
                Request.NowRequest request
        )
		{
			return new NowTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.NowResult> NowAsync(
                Request.NowRequest request
        )
		{
			var task = new NowTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class DescribeRoomsTask : Gs2RestSessionTask<DescribeRoomsRequest, DescribeRoomsResult>
        {
            public DescribeRoomsTask(IGs2Session session, RestSessionRequestFactory factory, DescribeRoomsRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(DescribeRoomsRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}/room";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.PageToken != null) {
                    sessionRequest.AddQueryString("pageToken", $"{request.PageToken}");
                }
                if (request.Limit != null) {
                    sessionRequest.AddQueryString("limit", $"{request.Limit}");
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator DescribeRooms(
                Request.DescribeRoomsRequest request,
                UnityAction<AsyncResult<Result.DescribeRoomsResult>> callback
        )
		{
			var task = new DescribeRoomsTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.DescribeRoomsResult>(task.Result, task.Error));
        }

		public IFuture<Result.DescribeRoomsResult> DescribeRoomsFuture(
                Request.DescribeRoomsRequest request
        )
		{
			return new DescribeRoomsTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.DescribeRoomsResult> DescribeRoomsAsync(
                Request.DescribeRoomsRequest request
        )
		{
            AsyncResult<Result.DescribeRoomsResult> result = null;
			await DescribeRooms(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public DescribeRoomsTask DescribeRoomsAsync(
                Request.DescribeRoomsRequest request
        )
		{
			return new DescribeRoomsTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.DescribeRoomsResult> DescribeRoomsAsync(
                Request.DescribeRoomsRequest request
        )
		{
			var task = new DescribeRoomsTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class WantRoomTask : Gs2RestSessionTask<WantRoomRequest, WantRoomResult>
        {
            public WantRoomTask(IGs2Session session, RestSessionRequestFactory factory, WantRoomRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(WantRoomRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}/room";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");

                var sessionRequest = Factory.Post(url);

                var stringBuilder = new StringBuilder();
                var jsonWriter = new JsonWriter(stringBuilder);
                jsonWriter.WriteObjectStart();
                if (request.Name != null)
                {
                    jsonWriter.WritePropertyName("name");
                    jsonWriter.Write(request.Name);
                }
                if (request.NotificationUserIds != null)
                {
                    jsonWriter.WritePropertyName("notificationUserIds");
                    jsonWriter.WriteArrayStart();
                    foreach(var item in request.NotificationUserIds)
                    {
                        jsonWriter.Write(item);
                    }
                    jsonWriter.WriteArrayEnd();
                }
                if (request.ContextStack != null)
                {
                    jsonWriter.WritePropertyName("contextStack");
                    jsonWriter.Write(request.ContextStack.ToString());
                }
                jsonWriter.WriteObjectEnd();

                var body = stringBuilder.ToString();
                if (!string.IsNullOrEmpty(body))
                {
                    sessionRequest.Body = body;
                }
                sessionRequest.AddHeader("Content-Type", "application/json");
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator WantRoom(
                Request.WantRoomRequest request,
                UnityAction<AsyncResult<Result.WantRoomResult>> callback
        )
		{
			var task = new WantRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.WantRoomResult>(task.Result, task.Error));
        }

		public IFuture<Result.WantRoomResult> WantRoomFuture(
                Request.WantRoomRequest request
        )
		{
			return new WantRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.WantRoomResult> WantRoomAsync(
                Request.WantRoomRequest request
        )
		{
            AsyncResult<Result.WantRoomResult> result = null;
			await WantRoom(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public WantRoomTask WantRoomAsync(
                Request.WantRoomRequest request
        )
		{
			return new WantRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.WantRoomResult> WantRoomAsync(
                Request.WantRoomRequest request
        )
		{
			var task = new WantRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class GetRoomTask : Gs2RestSessionTask<GetRoomRequest, GetRoomResult>
        {
            public GetRoomTask(IGs2Session session, RestSessionRequestFactory factory, GetRoomRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(GetRoomRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}/room/{roomName}";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");
                url = url.Replace("{roomName}", !string.IsNullOrEmpty(request.RoomName) ? request.RoomName.ToString() : "null");

                var sessionRequest = Factory.Get(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator GetRoom(
                Request.GetRoomRequest request,
                UnityAction<AsyncResult<Result.GetRoomResult>> callback
        )
		{
			var task = new GetRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.GetRoomResult>(task.Result, task.Error));
        }

		public IFuture<Result.GetRoomResult> GetRoomFuture(
                Request.GetRoomRequest request
        )
		{
			return new GetRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.GetRoomResult> GetRoomAsync(
                Request.GetRoomRequest request
        )
		{
            AsyncResult<Result.GetRoomResult> result = null;
			await GetRoom(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public GetRoomTask GetRoomAsync(
                Request.GetRoomRequest request
        )
		{
			return new GetRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.GetRoomResult> GetRoomAsync(
                Request.GetRoomRequest request
        )
		{
			var task = new GetRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif


        public class DeleteRoomTask : Gs2RestSessionTask<DeleteRoomRequest, DeleteRoomResult>
        {
            public DeleteRoomTask(IGs2Session session, RestSessionRequestFactory factory, DeleteRoomRequest request) : base(session, factory, request)
            {
            }

            protected override IGs2SessionRequest CreateRequest(DeleteRoomRequest request)
            {
                var url = Gs2RestSession.EndpointHost
                    .Replace("{service}", "realtime")
                    .Replace("{region}", Session.Region.DisplayName())
                    + "/{namespaceName}/room/{roomName}";

                url = url.Replace("{namespaceName}", !string.IsNullOrEmpty(request.NamespaceName) ? request.NamespaceName.ToString() : "null");
                url = url.Replace("{roomName}", !string.IsNullOrEmpty(request.RoomName) ? request.RoomName.ToString() : "null");

                var sessionRequest = Factory.Delete(url);
                if (request.ContextStack != null)
                {
                    sessionRequest.AddQueryString("contextStack", request.ContextStack);
                }
                if (request.DryRun)
                {
                    sessionRequest.AddHeader("X-GS2-DRY-RUN", "true");
                }

                AddHeader(
                    Session.Credential,
                    sessionRequest
                );

                return sessionRequest;
            }
        }

#if UNITY_2017_1_OR_NEWER
		public IEnumerator DeleteRoom(
                Request.DeleteRoomRequest request,
                UnityAction<AsyncResult<Result.DeleteRoomResult>> callback
        )
		{
			var task = new DeleteRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
            yield return task;
            callback.Invoke(new AsyncResult<Result.DeleteRoomResult>(task.Result, task.Error));
        }

		public IFuture<Result.DeleteRoomResult> DeleteRoomFuture(
                Request.DeleteRoomRequest request
        )
		{
			return new DeleteRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
                request
			);
        }

    #if GS2_ENABLE_UNITASK
		public async UniTask<Result.DeleteRoomResult> DeleteRoomAsync(
                Request.DeleteRoomRequest request
        )
		{
            AsyncResult<Result.DeleteRoomResult> result = null;
			await DeleteRoom(
                request,
                r => result = r
            );
            if (result.Error != null)
            {
                throw result.Error;
            }
            return result.Result;
        }
    #else
		public DeleteRoomTask DeleteRoomAsync(
                Request.DeleteRoomRequest request
        )
		{
			return new DeleteRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new UnityRestSessionRequest(_certificateHandler)),
			    request
            );
        }
    #endif
#else
		public async Task<Result.DeleteRoomResult> DeleteRoomAsync(
                Request.DeleteRoomRequest request
        )
		{
			var task = new DeleteRoomTask(
                Gs2RestSession,
                new RestSessionRequestFactory(() => new DotNetRestSessionRequest()),
			    request
            );
			return await task.Invoke();
        }
#endif
	}
}