package com.crypto;
public class Caesar {
    
    public static String encode(String plaintext, int key){
        String alphabet = "abcdefghijklmnopqrstuvwxyz";
        char encoded[] = plaintext.toCharArray();

        for(int i = 0; i < plaintext.length(); i++){
            encoded[i] = alphabet.charAt(alphabet.indexOf(encoded[i]) + key % 26);
        }
        return String.valueOf(encoded);
    }

    public static String[] decode(String ciphertext){
        String alphabet = "abcdefghijklmnopqrstuvwxyz";
        char encoded[] = ciphertext.toCharArray();
        char decoded[] = new char[ciphertext.length()];
        String bruteforce[] = new String[26];
        for(int key = 0; key < alphabet.length(); key++){
            for(int i = 0; i < ciphertext.length(); i++){
                decoded[i] = alphabet.charAt(alphabet.indexOf(encoded[i]) + key % 26);
            }
            bruteforce[key] = String.valueOf(encoded);
        }
        return bruteforce;

    }
}