import java.util.Scanner;
import java.util.ArrayList;

public class Ciphark
{
  private final String alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ .";
  private String shiftSt;
  private String swapSt = ". ZYXWVUTSRQPONMLKJIHGFEDCBA";
  private int howFar;
  private static String message;
  private ArrayList scrambled;

  public static void main(String args[])
  {
    Scanner keyboard = new Scanner(System.in);
    System.out.print("Type in a message to encode or to decode");
    message = keyboard.nextLine();
    System.out.print("Press e if you wish to encode or d if you wish to decode the message");
    String m = keyboard.next();
    if(m.equals("e"))
    {
      Ciphark lawlz = new Ciphark();
      message = lawlz.swap(message);
      message = lawlz.shift(message);
      message = lawlz.swap(message);
      message = lawlz.scramble(message);
      System.out.println(message);
    }
    else if(m.equals("d"))
    {

    }
  }

  public Ciphark()
  {
    howFar = (int)(Math.random()*28);
    shiftSt = alpha.substring(howFar) + alpha.substring(0,howFar);
  }

  public String swap(String toSwap)
  {
    toSwap = toSwap.toUpperCase();
    String meh = "";
    for(int i = 0;i<toSwap.length();i++)
    {meh+=swapSt.charAt(alpha.indexOf(toSwap.charAt(i)));}
    return meh;
  }

  public String shift(String toShift)
  {
    toShift = toShift.toUpperCase();
    String meh = "";
    for(int i = 0;i<toShift.length();i++)
    {meh+=shiftSt.charAt(alpha.indexOf(toShift.charAt(i)));}
    return meh;
  }

  public String deShift(String toDeShift)
  {
    toDeShift = toDeShift.toUpperCase();
    String meh = "";
    for(int i = 0;i<toDeShift.length();i++)
    {meh+=alpha.charAt(shiftSt.indexOf(toDeShift.charAt(i)));}
    return meh;
  }

  public String scramble(String toScramble)
  {
    String meh = "";
    ArrayList alph = new ArrayList();
    for(int i = 0;i<alpha.length();i++)
    {alph.add(alpha.charAt(i));}

    scrambled = new ArrayList();
    while(alph.size()>0)
    {
      int spot = (int)(Math.random()*alph.size());
      scrambled.add(alph.get(spot));
      alph.remove(spot);
    }

    toScramble = toScramble.toUpperCase();
    for(int i = 0;i<toScramble.length();i++)
    {
      char p = toScramble.charAt(i);
      int ind = indexOff(alph,p);
      meh+=scrambled.get(ind);
    }
    return meh.toLowerCase();
  }

  public int indexOff(ArrayList a,char b)
  {
    int index = 0;
    while(index<a.size())
    {
      if(a.get(index) == b) return index;
    }
    return -1;
  }
}