using System;
using System.Windows;
using System.Windows.Forms;

namespace ROTFinder2._0
{
    class Program
    {
        static void Main()
        {
            int Menu_1 = 1;
            bool Scn1 = true;
            // Loop back in order to clear the screen and redraw the text, pretending we have graphics
            while (Scn1 == true)
            {
                // Keep Menu_1 in the 1 or 2 range
                switch (Menu_1)
                {
                    case 0:
                        Menu_1 = 2;
                        continue;
                    case 3:
                        Menu_1 = 1;
                        continue;
                }
                // Screen clearing will be disabled if it's not possible.
                if (!Console.IsOutputRedirected) Console.Clear();
                Console.WriteLine("Welcome to Zack's All-in-One ROT Tool 2.0");
                if (Menu_1 == 1)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("-> A) Write");
                    Console.ForegroundColor = ConsoleColor.White;
                }
                else
                {
                    Console.WriteLine("A) Write");
                }

                if (Menu_1 == 2)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("-> B) Read");
                    Console.ForegroundColor = ConsoleColor.White;
                }
                else
                {
                    Console.WriteLine("B) Read");
                }

                ConsoleKeyInfo Lastkey = Console.ReadKey();
                string LastKeyPressed = Convert.ToString(Lastkey.Key);

                switch (LastKeyPressed)
                {
                    case "DownArrow":
                        {
                            Menu_1 += 1;
                            continue;
                        }

                    case "UpArrow":
                        {
                            Menu_1 -= 1;
                            continue;
                        }

                    case "Enter":
                        {
                            if (Menu_1 == 1)
                            {
                                Scn1 = false;
                                Create();
                                break;
                            }
                            else
                            {
                                Scn1 = false;
                                Read();
                                break;
                            }
                        }
                }
            }


            Console.ReadLine();

            static void Create()
            {
                if (!Console.IsOutputRedirected) Console.Clear();
                Console.WriteLine("====== CODE CREATOR ======");
                Console.Write("Text goes here: ");
                string Start = Console.ReadLine();
                Console.WriteLine("ROT Number Here");
                Console.WriteLine("The ROT Number is the amount of characters shifted over, with ROT 5 'a' becomes 'f'");
                int rot = Convert.ToInt32(Console.ReadLine());
                string newtext = ROTgen(Start, rot);
                Console.WriteLine(newtext);
                Console.Write("Press any key to continue");
                Console.ReadKey();
                Main();
            }

            static void Read()
            {
                string Output = "";
                if (!Console.IsOutputRedirected) Console.Clear();
                Console.WriteLine("====== CODE READER ======");
                Console.Write("Text goes here: ");
                string Start = Console.ReadLine();
                for (int z = 0; z < 26; z++)
                {
                    Output = ROTgen(Start, z);
                    Console.WriteLine(Output);
                }
                Console.WriteLine("Press any key to continue");
                Console.ReadKey();
                Main();
            }

            static string ROTgen(string Input, int rot)
            {
                string CurrentChar = "a";
                // The alphabet is doubled for rotations that go past Z
                string alphabet = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz";
                string newtext = "";
                int CurrentIndex = 0;
                // Converting the input to lowercase to make the chart simpler
                Input = Input.ToLower();
                // For each character in the string
                for (int i = 0; i < Input.Length; i++)
                {
                    CurrentChar = Input.Substring(i, 1);
                    // If the current character is a letter, do the swap, if it's a symbol, leave it the same.
                    if (alphabet.Contains(CurrentChar))
                    {
                        /*Get the index of the current letter in the chart, add the ROT value, then
                        find the character that corrosponds to the new index */
                        CurrentIndex = Convert.ToInt32(alphabet.IndexOf(CurrentChar, 0));
                        CurrentIndex = CurrentIndex + rot;
                        newtext += alphabet.Substring(CurrentIndex, 1);
                    }
                    else
                    {
                        newtext += CurrentChar;
                    }
                    
                }
                return newtext;
            }
        }
    }
}