public async Task UpdateLanguageAndRuntime()

in src/Cli/func/Actions/LocalActions/CreateFunctionAction.cs [280:336]
54 lines of code
13 McCabe index (conditional complexity)

        public async Task UpdateLanguageAndRuntime()
        {
            _workerRuntime = GlobalCoreToolsSettings.CurrentWorkerRuntimeOrNone;
            if (!CurrentPathHasLocalSettings())
            {
                // we're assuming "func init" has not been run
                await _initAction.RunAsync();
                _workerRuntime = _initAction.ResolvedWorkerRuntime;
                Language = _initAction.ResolvedLanguage;
            }

            if (_workerRuntime != WorkerRuntime.None && !string.IsNullOrWhiteSpace(Language))
            {
                // validate
                var workerRuntimeSelected = WorkerRuntimeLanguageHelper.NormalizeWorkerRuntime(Language);
                if (_workerRuntime != workerRuntimeSelected)
                {
                    throw new CliException("Selected language doesn't match worker set in local.settings.json." +
                        $"Selected worker is: {_workerRuntime} and selected language is: {workerRuntimeSelected}");
                }
            }
            else if (string.IsNullOrWhiteSpace(Language))
            {
                if (_workerRuntime == WorkerRuntime.None)
                {
                    SelectionMenuHelper.DisplaySelectionWizardPrompt("language");
                    Language = SelectionMenuHelper.DisplaySelectionWizard(_templates.Value.Select(t => t.Metadata.Language).Where(l => !l.Equals("python", StringComparison.OrdinalIgnoreCase)).Distinct());
                    _workerRuntime = WorkerRuntimeLanguageHelper.SetWorkerRuntime(_secretsManager, Language);
                }
                else if (!WorkerRuntimeLanguageHelper.IsDotnet(_workerRuntime) || Csx)
                {
                    var languages = WorkerRuntimeLanguageHelper.LanguagesForWorker(_workerRuntime);
                    var displayList = _templates.Value
                            .Select(t => t.Metadata.Language)
                            .Where(l => languages.Contains(l, StringComparer.OrdinalIgnoreCase))
                            .Distinct(StringComparer.OrdinalIgnoreCase)
                            .ToArray();
                    if (displayList.Length == 1)
                    {
                        Language = displayList.First();
                    }
                    else if (!InferAndUpdateLanguage(_workerRuntime))
                    {
                        SelectionMenuHelper.DisplaySelectionWizardPrompt("language");
                        Language = SelectionMenuHelper.DisplaySelectionWizard(displayList);
                    }
                }
                else if (WorkerRuntimeLanguageHelper.IsDotnet(_workerRuntime))
                {
                    InferAndUpdateLanguage(_workerRuntime);
                }
            }
            else if (!string.IsNullOrWhiteSpace(Language))
            {
                _workerRuntime = WorkerRuntimeLanguageHelper.SetWorkerRuntime(_secretsManager, Language);
            }
        }