using System;

public class Program

{

    public class Global

    {

        public static int topsize;

        public static int bottomsize;

        public static int sidesize;

        public static int area;

        public static int perimeter;

        public static string name;

    }

    public static void Main(string[] args)

    {

        background();

        information();

        GetName();

        menu();

    }

    static void information()

    {

        Console.WriteLine("                              Basic Geometry program");

        Console.WriteLine("");

        Console.WriteLine(" Draw a square or a rectangle and giving you the area and perimeter of your shape. ");

        Console.WriteLine("");

        Console.ReadLine();

    }

    static void background()

    {

        Console.Clear();

    }

    static void GetName()

    {

        Console.WriteLine("");

        Console.WriteLine("Please input your first name:");

        Global.name = Console.ReadLine();

    }

    static void menu()

    {

        background();

        int options;

        Console.WriteLine("           Menu");

        Console.WriteLine(" ");

        Console.WriteLine("1. Draw a Square");

        Console.WriteLine("2. Draw a Rectangle");

        Console.WriteLine("3. Exit the Program");

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine(Global.name + ", please select a number from the menu: ");

        options = int.Parse(Console.ReadLine());

        if ((options < 1) || (options > 3))

        {

            menu();

        }

        if (options == 1)

        {

            Square();

        }

        if (options == 2)

        {

            Rectangle();

        }

        if (options == 3)

        {

            exit();

        }

    }

    static void Rectangle()

    {

        background();

        Console.WriteLine(Global.name + ", welcome to my rectangle maker!");

        Console.WriteLine("Please enter the length of the rectangle for my thinga-ma-bob to draw");

        Global.topsize = int.Parse(Console.ReadLine());

        Console.WriteLine("Please enter the width of the rectangle for my thinga-ma-bob to draw");

        Global.sidesize = int.Parse(Console.ReadLine());

        Global.bottomsize = Global.topsize;

        start();

        topnum();

        top();

        sides();

        bottom();

        recMath();

        Console.ReadLine();

        menu();

    }

    static void Square()

    {

        background();

        Console.WriteLine(Global.name + ", welcome to my square maker!");

        Console.WriteLine("Please enter the length and the width of the square for my thinga-ma-bob to draw");

        Global.topsize = int.Parse(Console.ReadLine());

        Global.sidesize = Global.topsize;

        Global.bottomsize = Global.topsize;

        start();

        topnum();

        top();

        sides();

        bottom();

        sqMath();

        Console.ReadLine();

        menu();

    }

    static void exit()

    {

        background();

        Console.WriteLine("          Basic Geometry program");

        Console.WriteLine("");

        Console.WriteLine(Global.name + " thanks for using my Thinga-ma-bob drawer. ");

        Console.WriteLine("            Come back again!");

        Console.WriteLine("");

        Console.ReadLine();

    }

    static void start()

    {

        for (int i = 1; i <= 10; i++)

        {

            Console.WriteLine(" ");

        }

        Console.Write("         ");

    }

    static void topnum()

    {

        int midway = (Global.topsize / 2) + 1;

        for (int k = 1; k <= midway; k++)

        {

            Console.Write(" ");

        }

        Console.Write(Global.topsize);

        Console.WriteLine("");

        Console.Write("         ");

    }

    static void top()

    {

        Console.Write("+");

        for (int i = 1; i <= Global.topsize; i++)

        {

            Console.Write("-");

        }

        Console.Write("+");

        Console.WriteLine();

        Console.Write("         ");

    }

    static void sides()

    {

        int midway = (Global.sidesize / 2) + 1;

        for (int i = 1; i <= Global.sidesize; i++)

        {

            Console.Write("|");

            for (int n = 1; n <= Global.topsize; n++)

            {

                Console.Write(" ");

            }

            Console.Write("|");

            if (i == midway)

            {

                Console.Write(" " + Global.sidesize);

            }

            Console.WriteLine("");

            Console.Write("         ");

        }

    }

    static void bottom()

    {

        Console.Write("+");

        for (int i = 1; i <= Global.topsize; i++)

        {

            Console.Write("-");

        }

        Console.Write("+");

        Console.WriteLine();

        Console.Write("         ");

    }

    static void recMath()

    {

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine("");

        Console.Write("The area for your rectangle with a length of " + Global.topsize);

        Console.Write(" and a width of " + Global.sidesize);

        Global.area = Global.topsize * Global.sidesize;

        Console.WriteLine(" is = " + Global.area);

        Global.perimeter = 2 * Global.topsize + 2 * Global.sidesize;

        Console.WriteLine("and the perimeter is =  " + Global.perimeter);   

    }

    static void sqMath()

    {

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine("");

        Console.Write("The area for your square with a length and width of " + Global.topsize);

        Global.area = Global.topsize * Global.sidesize;

        Console.WriteLine(" is = " + Global.area);

        Global.perimeter = 2 * Global.topsize + 2 * Global.sidesize;

        Console.WriteLine("and the perimeter is =  " + Global.perimeter);   

    }

}