private IDictionary MergeAppSettings()

in src/Cli/func/Actions/AzureActions/PublishFunctionAppAction.cs [1324:1383]
56 lines of code
12 McCabe index (conditional complexity)

        private IDictionary<string, string> MergeAppSettings(IDictionary<string, string> azure, IDictionary<string, string> local, IDictionary<string, string> additional)
        {
            var result = new Dictionary<string, string>(azure);

            foreach (var pair in local)
            {
                if (result.ContainsKeyCaseInsensitive(pair.Key) &&
                    !result.GetValueCaseInsensitive(pair.Key).Equals(pair.Value, StringComparison.OrdinalIgnoreCase))
                {
                    ColoredConsole.WriteLine($"App setting {pair.Key} is different between azure and {SecretsManager.AppSettingsFileName}");
                    if (OverwriteSettings)
                    {
                        ColoredConsole.WriteLine("Overwriting setting in azure with local value because '--overwrite-settings [-y]' was specified.");
                        result[pair.Key] = pair.Value;
                    }
                    else
                    {
                        string answer;
                        do
                        {
                            ColoredConsole.WriteLine(QuestionColor("Would you like to overwrite value in azure? [yes/no/show]"));
                            answer = Console.ReadLine();
                            if (answer.Equals("show", StringComparison.OrdinalIgnoreCase))
                            {
                                ColoredConsole
                                    .WriteLine($"Azure: {azure.GetValueCaseInsensitive(pair.Key)}")
                                    .WriteLine($"Locally: {pair.Value}");
                            }
                        }
                        while (!answer.Equals("yes", StringComparison.OrdinalIgnoreCase) &&
                                 !answer.Equals("no", StringComparison.OrdinalIgnoreCase));

                        if (answer.Equals("yes", StringComparison.OrdinalIgnoreCase))
                        {
                            result[pair.Key] = pair.Value;
                        }
                    }
                }
                else
                {
                    ColoredConsole.WriteLine($"Setting {pair.Key} = ****");
                    result[pair.Key] = pair.Value;
                }
            }

            foreach (var pair in additional)
            {
                if (!string.IsNullOrEmpty(pair.Value))
                {
                    result[pair.Key] = pair.Value;
                }
                else if (result.ContainsKey(pair.Key))
                {
                    ColoredConsole.WriteLine(WarningColor($"Removing '{pair.Key}' from '{FunctionAppName}'"));
                    result.Remove(pair.Key);
                }
            }

            return result;
        }