private Expression CreateScalarPropertiesAsFormEncodedStringMethod(TypeDefinitionExpression expression)
        {
            var self       = Expression.Parameter(expression.Type, "self");
            var properties = ExpressionGatherer.Gather(expression, ServiceExpressionType.PropertyDefinition).Where(c => !(c.Type is FickleListType)).ToList();
            var parameters = properties.OfType <PropertyDefinitionExpression>().ToDictionary(c => c.PropertyName, c => Expression.Property(self, c.PropertyName));
            var path       = string.Join("", properties.OfType <PropertyDefinitionExpression>().Select(c => c.PropertyName + "={" + c.PropertyName + "}"));

            var formatInfo = ObjectiveStringFormatInfo.GetObjectiveStringFormatInfo
                             (
                path,
                c => parameters[c],
                (s, t) => t == typeof(string) ? s : s + "&",
                c => FickleExpression.Call(c, typeof(string), "stringByAppendingString", Expression.Constant("&"))
                             );

            var parameterInfos = new List <ParameterInfo>
            {
                new FickleParameterInfo(typeof(string), "format")
            };

            parameterInfos.AddRange(formatInfo.ParameterExpressions.Select(c => new ObjectiveParameterInfo(c.Type, c.Name, true)));

            var args = new List <Expression>
            {
                Expression.Constant(formatInfo.Format)
            };

            args.AddRange(formatInfo.ValueExpressions);

            var methodInfo = new FickleMethodInfo(typeof(string), typeof(string), "stringWithFormat", parameterInfos.ToArray(), true);
            var methodBody = Expression.Block(FickleExpression.Return(Expression.Call(null, methodInfo, args)).ToStatement());

            return(new MethodDefinitionExpression("scalarPropertiesAsFormEncodedString", new List <Expression>().ToReadOnlyCollection(), typeof(string), methodBody, false, null));
        }
        protected Expression CreateGatewayCallMethod(MethodDefinitionExpression method, out ParameterExpression optionsParameter)
        {
            var methodName = method.Name.ToCamelCase();

            methodCount++;

            var self               = Expression.Variable(currentType, "self");
            var hostname           = Expression.Variable(typeof(string), "hostname");
            var port               = Expression.Variable(typeof(string), "port");
            var protocol           = Expression.Variable(typeof(string), "protocol");
            var optionsParam       = FickleExpression.Parameter("NSDictionary", "options");
            var localOptions       = FickleExpression.Variable("NSMutableDictionary", "localOptions");
            var requestObject      = FickleExpression.Variable("NSObject", "requestObject");
            var requestObjectValue = (Expression)Expression.Constant(null, typeof(object));
            var url                 = Expression.Variable(typeof(string), "url");
            var responseType        = ObjectiveBinderHelpers.GetWrappedResponseType(this.CodeGenerationContext, method.ReturnType);
            var variables           = new [] { url, localOptions, protocol, hostname, requestObject, port };
            var declaredHostname    = currentTypeDefinitionExpression.Attributes["Hostname"];
            var declaredPath        = method.Attributes["Path"];
            var path                = StringUriUtils.Combine("%@://%@%@", declaredPath);
            var httpMethod          = method.Attributes["Method"];
            var declaredProtocol    = Convert.ToBoolean(method.Attributes["Secure"]) ? "https" : "http";
            var retryBlockVariable  = Expression.Variable(new FickleDelegateType(typeof(void), new FickleParameterInfo(FickleType.Define("id"), "block")), "retryBlock");
            var retryBlockParameter = Expression.Variable(FickleType.Define("id"), "block");

            var parametersByName = method.Parameters.ToDictionary(c => ((ParameterExpression)c).Name, c => (ParameterExpression)c, StringComparer.InvariantCultureIgnoreCase);

            var formatInfo = ObjectiveStringFormatInfo.GetObjectiveStringFormatInfo(path, c => parametersByName[c]);

            var args       = formatInfo.ValueExpressions;
            var parameters = formatInfo.ParameterExpressions;

            var parameterInfos = new List <FickleParameterInfo>
            {
                new ObjectiveParameterInfo(typeof(string), "s"),
                new ObjectiveParameterInfo(typeof(string), "protocol", true),
                new ObjectiveParameterInfo(typeof(string), "hostname", true),
                new ObjectiveParameterInfo(typeof(string), "port", true),
            };

            parameterInfos.AddRange(parameters.Select(c => new ObjectiveParameterInfo(c.Type, c.Name, true)));

            var methodInfo = new FickleMethodInfo(typeof(string), typeof(string), "stringWithFormat", parameterInfos.ToArray(), true);

            args.InsertRange(0, new Expression[] { Expression.Constant(formatInfo.Format), protocol, hostname, port });

            var newParameters = new List <Expression>(method.Parameters)
            {
                optionsParam
            };
            var callback = Expression.Parameter(new FickleDelegateType(typeof(void), new FickleParameterInfo(responseType, "response")), "callback");

            newParameters.Add(callback);

            Expression blockArg = Expression.Parameter(FickleType.Define("id"), "arg1");

            var returnType = method.ReturnType;

            if (ObjectiveBinderHelpers.NeedsValueResponseWrapper(method.ReturnType))
            {
                returnType = FickleType.Define(ObjectiveBinderHelpers.GetValueResponseWrapperTypeName(method.ReturnType));
            }

            var responseFilter = FickleExpression.Property(self, "FKGatewayResponseFilter", "responseFilter");
            var conversion     = Expression.Convert(blockArg, returnType);

            var innerRetryBlockBody = FickleExpression.Block
                                      (
                FickleExpression.Call(Expression.Convert(retryBlockParameter, retryBlockVariable.Type), typeof(void), "Invoke", new { block = retryBlockParameter }).ToStatement()
                                      );

            var innerRetryBlock = (Expression)FickleExpression.SimpleLambda
                                  (
                typeof(void), innerRetryBlockBody, new Expression[0]
                                  );

            var body = FickleExpression.GroupedWide
                       (
                Expression.IfThen(Expression.NotEqual(responseFilter, Expression.Constant(null, responseFilter.Type)), Expression.Assign(blockArg, FickleExpression.Call(responseFilter, typeof(object), "gateway", new { value = self, receivedResponse = blockArg, fromRequestURL = url, withRequestObject = requestObject, retryBlock = innerRetryBlock, andOptions = localOptions })).ToStatementBlock()),
                Expression.IfThen
                (
                    Expression.AndAlso(Expression.NotEqual(blockArg, Expression.Constant(null, blockArg.Type)), Expression.NotEqual(callback, Expression.Constant(null, callback.Type))),
                    FickleExpression.Call(callback, "Invoke", conversion).ToStatementBlock()
                )
                       );

            var conversionBlock = FickleExpression.SimpleLambda(null, body, new Expression[0], blockArg);

            var error = FickleExpression.Variable("NSError", "error");

            Expression parseResultBlock;

            var nsdataParam = Expression.Parameter(FickleType.Define("NSData"), "data");
            var clientParam = Expression.Parameter(FickleType.Define("PKWebServiceClient"), "client");
            var jsonObjectWithDataParameters = new[] { new FickleParameterInfo(FickleType.Define("NSDictionary"), "obj"), new FickleParameterInfo(typeof(int), "options"), new FickleParameterInfo(FickleType.Define("NSError", true), "error", true) };
            var objectWithDataMethodInfo     = new FickleMethodInfo(FickleType.Define("NSJSONSerialization"), FickleType.Define("NSData"), "JSONObjectWithData", jsonObjectWithDataParameters, true);
            var deserializedValue            = Expression.Parameter(FickleType.Define("id"), "deserializedValue");

            var parseErrorResult = FickleExpression.Call(self, "webServiceClient", new
            {
                clientParam,
                createErrorResponseWithErrorCode = "JsonDeserializationError",
                andMessage = FickleExpression.Call(error, "localizedDescription", null)
            });

            if (method.ReturnType == typeof(void))
            {
                var responseObject = FickleExpression.Variable(responseType, "responseObject");

                parseResultBlock = FickleExpression.SimpleLambda
                                   (
                    FickleType.Define("id"),
                    FickleExpression.GroupedWide
                    (
                        Expression.Assign(responseObject, FickleExpression.New(responseType, "init", null)).ToStatement(),
                        Expression.Assign(deserializedValue, Expression.Call(objectWithDataMethodInfo, nsdataParam, FickleExpression.Variable(typeof(int), "NSJSONReadingAllowFragments"), error)).ToStatement(),
                        Expression.IfThen(Expression.Equal(deserializedValue, Expression.Constant(null)), FickleExpression.Return(parseErrorResult).ToStatementBlock()),
                        FickleExpression.Return(responseObject).ToStatement()
                    ),
                    new Expression[] { deserializedValue, responseObject, error },
                    clientParam, nsdataParam
                                   );
            }
            else if (TypeSystem.IsPrimitiveType(method.ReturnType) || method.ReturnType is FickleListType)
            {
                var responseObject = FickleExpression.Variable(responseType, "responseObject");
                var needToBoxValue = ObjectiveBinderHelpers.ValueResponseValueNeedsBoxing(method.ReturnType);

                parseResultBlock = FickleExpression.SimpleLambda
                                   (
                    FickleType.Define("id"),
                    FickleExpression.GroupedWide
                    (
                        Expression.Assign(responseObject, FickleExpression.New(responseType, "init", null)).ToStatement(),
                        Expression.Assign(deserializedValue, Expression.Call(objectWithDataMethodInfo, nsdataParam, FickleExpression.Variable(typeof(int), "NSJSONReadingAllowFragments"), error)).ToStatement(),
                        Expression.IfThen(Expression.Equal(deserializedValue, Expression.Constant(null)), FickleExpression.Return(parseErrorResult).ToStatementBlock()),
                        PropertiesFromDictionaryExpressonBinder.GetDeserializeExpressionProcessValueDeserializer(method.ReturnType, deserializedValue, c => FickleExpression.Call(responseObject, typeof(void), "setValue", needToBoxValue  ? Expression.Convert(c, typeof(object)) : c).ToStatement()),
                        FickleExpression.Return(responseObject).ToStatement()
                    ),
                    new Expression[] { deserializedValue, responseObject, error },
                    clientParam, nsdataParam
                                   );
            }
            else
            {
                parseResultBlock = FickleExpression.SimpleLambda
                                   (
                    FickleType.Define("id"),
                    FickleExpression.GroupedWide
                    (
                        Expression.Assign(deserializedValue, Expression.Call(objectWithDataMethodInfo, nsdataParam, FickleExpression.Variable(typeof(int), "NSJSONReadingAllowFragments"), error)).ToStatement(),
                        PropertiesFromDictionaryExpressonBinder.GetDeserializeExpressionProcessValueDeserializer(method.ReturnType, deserializedValue, c => FickleExpression.Return(c).ToStatement()),
                        FickleExpression.Return(parseErrorResult).ToStatement()
                    ),
                    new Expression[] { deserializedValue, error },
                    clientParam, nsdataParam
                                   );
            }

            var uniqueNameMaker = new UniqueNameMaker(c => newParameters.Cast <ParameterExpression>().Any(d => d.Name.EqualsIgnoreCaseInvariant(c)));

            var key = FickleExpression.Variable(typeof(string), uniqueNameMaker.Make("key"));

            var integrateOptions = FickleExpression.ForEach
                                   (
                key,
                optionsParam,
                FickleExpression.Call(localOptions, typeof(void), "setObject", new { value = FickleExpression.Call(optionsParam, typeof(object), "objectForKey", key), forKey = key }).ToStatementBlock()
                                   );

            parseResultBlock = FickleExpression.Call(parseResultBlock, parseResultBlock.Type, "copy", null);

            var client = Expression.Variable(FickleType.Define(this.CodeGenerationContext.Options.ServiceClientTypeName ?? "PKWebServiceClient"), "client");

            Expression clientCallExpression;

            if (httpMethod.Equals("get", StringComparison.InvariantCultureIgnoreCase))
            {
                clientCallExpression = FickleExpression.Call(client, "getWithCallback", conversionBlock);
            }
            else
            {
                var contentParameterName = method.Attributes["Content"];
                var contentFormat        = method.Attributes["ContentFormat"];

                if (string.IsNullOrEmpty(contentParameterName))
                {
                    clientCallExpression = FickleExpression.Call(client, "postWithRequestObject", new
                    {
                        requestObject,
                        andCallback = conversionBlock
                    });
                }
                else
                {
                    var content = parametersByName[contentParameterName];

                    requestObjectValue = content.Type == typeof(byte[]) ? (Expression)content : FickleExpression.Call(self, typeof(object), this.GetNormalizeRequestMethodName(content.Type, contentFormat), new { serializeRequest = Expression.Convert(content, typeof(object)), paramName = Expression.Constant(contentParameterName) });

                    clientCallExpression = FickleExpression.Call(client, "postWithRequestObject", new
                    {
                        requestObject,
                        andCallback = conversionBlock
                    });
                }
            }

            var retryBlock = (Expression)FickleExpression.SimpleLambda
                             (
                typeof(void),
                FickleExpression.StatementisedGroupedExpression
                (
                    Expression.Assign(client, FickleExpression.Call(Expression.Variable(currentType, "self"), "PKWebServiceClient", "createClientWithURL", new
            {
                url,
                options = localOptions
            })),
                    Expression.Assign(FickleExpression.Property(client, currentType, "delegate"), self),
                    clientCallExpression
                ),
                new Expression[] { client },
                retryBlockParameter
                             );

            retryBlock = FickleExpression.Call(retryBlock, retryBlock.Type, "copy", null);

            var block = FickleExpression.Block
                        (
                variables.Concat(retryBlockVariable).ToArray(),
                Expression.Assign(requestObject, requestObjectValue),
                Expression.Assign(callback, FickleExpression.Call(callback, callback.Type, "copy", null)),
                Expression.Assign(localOptions, FickleExpression.Call(FickleExpression.Property(self, FickleType.Define("NSDictionary"), "options"), "NSMutableDictionary", "mutableCopyWithZone", new
            {
                zone = Expression.Constant(null, FickleType.Define("NSZone"))
            })),
                Expression.IfThen(Expression.NotEqual(requestObject, Expression.Constant(null)), FickleExpression.Call(localOptions, typeof(void), "setObject", new { value = requestObject, forKey = "$RequestObject" }).ToStatementBlock()),
                FickleExpression.Call(localOptions, typeof(void), "setObject", new { value = FickleExpression.StaticCall(responseType, "class", null), forKey = "$ResponseClass" }).ToStatement(),
                Expression.Assign(hostname, FickleExpression.Call(localOptions, typeof(string), "objectForKey", Expression.Constant("hostname"))),
                Expression.IfThen(Expression.Equal(hostname, Expression.Constant(null)), Expression.Assign(hostname, Expression.Constant(declaredHostname)).ToStatementBlock()),
                Expression.Assign(protocol, FickleExpression.Call(localOptions, typeof(string), "objectForKey", Expression.Constant("protocol"))),
                Expression.IfThen(Expression.Equal(protocol, Expression.Constant(null)), Expression.Assign(protocol, Expression.Constant(declaredProtocol)).ToStatementBlock()),
                Expression.Assign(port, FickleExpression.Call(FickleExpression.Call(localOptions, FickleType.Define("NSNumber"), "objectForKey", Expression.Constant("port")), typeof(string), "stringValue", null)),
                Expression.IfThenElse(Expression.Equal(port, Expression.Constant(null)), Expression.Assign(port, Expression.Constant("")).ToStatementBlock(), Expression.Assign(port, FickleExpression.Call(Expression.Constant(":"), typeof(string), "stringByAppendingString", port)).ToStatementBlock()),
                FickleExpression.Grouped
                (
                    FickleExpression.Call(localOptions, "setObject", new
            {
                obj    = parseResultBlock,
                forKey = "$ParseResultBlock"
            }).ToStatement(),
                    method.ReturnType.GetUnwrappedNullableType() == typeof(bool) ?
                    FickleExpression.Call(localOptions, "setObject", new
            {
                obj = Expression.Convert(Expression.Constant(1), typeof(object))
            }).ToStatement() : null
                ),
                Expression.Assign(url, Expression.Call(null, methodInfo, args)),
                FickleExpression.Call(localOptions, typeof(void), "setObject", new { value = url, forKey = "$RequestURL" }).ToStatement(),
                integrateOptions,
                Expression.Assign(retryBlockVariable, retryBlock),
                FickleExpression.Call(retryBlockVariable, typeof(void), "Invoke", retryBlockVariable).ToStatement()
                        );

            optionsParameter = optionsParam;

            return(new MethodDefinitionExpression(methodName, newParameters.ToReadOnlyCollection(), typeof(void), block, false, null));
        }