public async Task PollBusinessCase()

in src/HttpRequestHelper/HttpClientHelper.cs [787:871]
70 lines of code
12 McCabe index (conditional complexity)

        public async Task<AssessmentPollResponse> PollBusinessCase(UserInput userInputObj, BusinessCaseInformation businessCaseInfo)
        {
            if (userInputObj.CancellationContext.IsCancellationRequested)
                UtilityFunctions.InitiateCancellation(userInputObj);

            userInputObj.LoggerObj.LogInformation($"Polling business case {businessCaseInfo.BusinessCaseName} for status");

            AuthenticationResult authResult = null;
            HttpResponseMessage response;

            try
            {
                authResult = await AzureAuthenticationHandler.RetrieveAuthenticationToken();
            }
            catch (Exception exCacheTokenRetrieval)
            {
                throw new Exception($"Cached token retrieval failed: {exCacheTokenRetrieval.Message} Please re-login");
            }

            string workflow = userInputObj.WorkflowObj.IsExpressWorkflow ? "express" : "custom";

            try
            {
                HttpClient httpClient = new HttpClient()
                {
                    Timeout = TimeSpan.FromSeconds(60),
                };

                string url = Routes.ProtocolScheme + Routes.AzureManagementApiHostname + Routes.ForwardSlash +
                             Routes.SubscriptionPath + Routes.ForwardSlash + userInputObj.Subscription.Key + Routes.ForwardSlash +
                             Routes.ResourceGroupPath + Routes.ForwardSlash + userInputObj.ResourceGroupName.Value + Routes.ForwardSlash +
                             Routes.ProvidersPath + Routes.ForwardSlash + Routes.MigrateProvidersPath + Routes.ForwardSlash +
                             Routes.AssessmentProjectsPath + Routes.ForwardSlash + userInputObj.AssessmentProjectName + Routes.ForwardSlash +
                             Routes.BusinessCasesPath + Routes.ForwardSlash + businessCaseInfo.BusinessCaseName + Routes.QueryStringQuestionMark +
                             Routes.QueryParameterApiVersion + Routes.QueryStringEquals + Routes.BusinessCaseApiVersion;
                Uri baseAddress = new Uri(url);
                string clientRequestId = Guid.NewGuid().ToString();
                httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer " + authResult.AccessToken);
                httpClient.DefaultRequestHeaders.Add("Accept", "application/json");
                httpClient.DefaultRequestHeaders.Add("x-ms-client-request-id", clientRequestId + "-" + workflow + "-azmigexp");

                response = await httpClient.GetAsync(baseAddress);

                if (response == null || !response.IsSuccessStatusCode)
                {
                    userInputObj.LoggerObj.LogWarning($"Business case {businessCaseInfo.BusinessCaseName} polling response was not success. Status: {response?.StatusCode} Content: {response?.Content}");
                    if (!HttpUtilities.IsRetryNeeded(response, null))
                        return AssessmentPollResponse.Error;

                    return AssessmentPollResponse.NotCompleted;
                }

                string responseContent = await response.Content.ReadAsStringAsync();
                BusinessCaseInformationJSON businessCaseInformationObj = JsonConvert.DeserializeObject<BusinessCaseInformationJSON>(responseContent);

                if (businessCaseInformationObj.Properties.State.Equals("Completed"))
                {
                    userInputObj.LoggerObj.LogInformation($"Business case {businessCaseInfo.BusinessCaseName} completed");
                    return AssessmentPollResponse.Completed;
                }
                else if (businessCaseInformationObj.Properties.State.Equals("OutDated"))
                {
                    userInputObj.LoggerObj.LogWarning($"Business case {businessCaseInfo.BusinessCaseName} became out-dated during computation");
                    return AssessmentPollResponse.OutDated;
                }
                else if (businessCaseInformationObj.Properties.State.Equals("Invalid"))
                {
                    userInputObj.LoggerObj.LogError($"Business case {businessCaseInfo.BusinessCaseName} is invalid, corresponding datapoints will contain default values");
                    return AssessmentPollResponse.Invalid;
                }

                userInputObj.LoggerObj.LogInformation($"Business case {businessCaseInfo.BusinessCaseName} status is {businessCaseInformationObj.Properties.State}");

                return AssessmentPollResponse.NotCompleted;
            }
            catch (Exception exPollBizCase)
            {
                userInputObj.LoggerObj.LogWarning($"Business case {businessCaseInfo.BusinessCaseName} polling error: {exPollBizCase.Message}");

                if (!HttpUtilities.IsRetryNeeded(null, exPollBizCase))
                    return AssessmentPollResponse.Error;
            }

            return AssessmentPollResponse.NotCompleted;
        }