task9

using System;

public class Program
{
    public static void Main()
    {
        int consoleColorCount = ConsoleColor.GetNames(typeof(ConsoleColor)).Length;
        uint darkCyanNumber = 3;
        uint whiteNumber = 15;

        string userName = "";
        string userPassword = "";

        string chooseMenuInput;
        uint chooseColorInput;

        bool isRun = true;
        bool isChangeColor;

        while (isRun)
        {
            Console.WriteLine("\nWhat do you want to do : ");
            Console.WriteLine("CreateUser\n" +
                              "ChangePassword\n" +
                              "GetName\n" +
                              "ChangeTextColor\n" +
                              "ChangeBackgroundColor\n" +
                              "Esc");
            chooseMenuInput = Console.ReadLine();

            switch (chooseMenuInput)
            {
                case "CreateUser":
                    Console.WriteLine("\nPlease input name of user : ");
                    userName = Console.ReadLine();
                    Console.WriteLine("Please input password of user : ");
                    userPassword = Console.ReadLine();
                    break;
                case "ChangePassword":
                    if (String.IsNullOrEmpty(userPassword) == false)
                    {
                        Console.WriteLine("\nPlease input a new password : ");
                        userPassword = Console.ReadLine();
                    }
                    else
                    {
                        Console.WriteLine("\nPlease CreateUser to ChangePassword.");
                    }
                    break;
                case "GetName":
                    if (String.IsNullOrEmpty(userName) == false)
                    {
                        Console.WriteLine("\nUser name is : " + userName);
                    }
                    else
                    {
                        Console.WriteLine("\nPlease CreateUser to GetName.");
                    }
                    break;
                case "ChangeTextColor":
                    isChangeColor = true;
                    while (isChangeColor)
                    {
                        Console.WriteLine("\nChoose colors of text : ");
                        Console.WriteLine("0. Black\n" +
                                          "1.DarkBlue\n" +
                                          "2.DarkGreen\n" +
                                          "4.DarkRed\n" +
                                          "5.DarkMagenta\n" +
                                          "6.DarkYellow\n" +
                                          "7.Gray\n" +
                                          "8.DarkGray\n" +
                                          "9.Blue\n" +
                                          "10.Green\n" +
                                          "11.Cyan\n" +
                                          "12.Red\n" +
                                          "13.Magenta\n" +
                                          "14.Yellow\n" +
                                          "15.White");
                        chooseColorInput = Convert.ToUInt32(Console.ReadLine());

                        if (chooseColorInput < consoleColorCount && chooseColorInput != darkCyanNumber)
                        {
                            Console.ForegroundColor = (ConsoleColor) chooseColorInput;
                            isChangeColor = false;
                        }
                        else
                        {
                            Console.WriteLine("Please input number of color in range.");
                        }
                    }
                    break;
                case "ChangeBackgroundColor":
                    Console.WriteLine();
                    isChangeColor = true;
                    while (isChangeColor)
                    {
                        Console.WriteLine("\nChoose colors of text : ");
                        Console.WriteLine("0. Black\n" +
                                          "1.DarkBlue\n" +
                                          "2.DarkGreen\n" +
                                          "3.DarkCyan\n" +
                                          "4.DarkRed\n" +
                                          "5.DarkMagenta\n" +
                                          "6.DarkYellow\n" +
                                          "7.Gray\n" +
                                          "8.DarkGray\n" +
                                          "9.Blue\n" +
                                          "10.Green\n" +
                                          "11.Cyan\n" +
                                          "12.Red\n" +
                                          "13.Magenta\n" +
                                          "14.Yellow");
                        chooseColorInput = Convert.ToUInt32(Console.ReadLine());

                        if (chooseColorInput < consoleColorCount && chooseColorInput != whiteNumber)
                        {
                            Console.BackgroundColor = (ConsoleColor) chooseColorInput;
                            isChangeColor = false;
                        }
                        else
                        {
                            Console.WriteLine("Please input number of color in range.");
                        }
                    }
                    break;
                case "Esc":
                    isRun = false;
                    break;
                default:
                    Console.WriteLine("\nPlease input name of command correctly.");
                    break;
            }
        }
    }
}