import java.lang.*;
import java.util.*;
import java.util.Random;
/**
 * Day2 exercise.
 * "generate a random String of 5 characters. on each guess, you say how many
 *  letters are the correct letter in the correct spot, and how many letters
 *  are a correct letter but in the wrong spot"
 * @author messa
 */
public class Day2 {

public static String generate_random_word(int random_word_leght){
//This class returns "random_word" string of lenght given in "random_word_leght"

//Initialize stringBuilder
StringBuilder stringBuilder = new StringBuilder();

String random_word=""; //random word the be generated
for ( int i=0; i < random_word_leght; i++)
{
//Alphabet list to choose characters from.
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; //52

//Get random number from alphabet 0-51 to get the letter. 52 its not a typo.
int  random_number = new Random().nextInt(52);

//Choose alphabet letter, convert it from char to string.
String random_letter=Character.toString(alphabet.charAt(random_number));

//Join each "random_letter" toghether as "random_word".
stringBuilder.append(random_letter);
random_word= stringBuilder.toString();
}

return random_word;
}

public static void count_letters(String user_input,String rword){
//This part of program is counting number of characters from "user_input" and
//"random_word" strings to find:
// - maching letters at the same positions
// - maching letters at all postions

 int correct_characters=0;
 int correct_characters_at_same_spot=0;
 int number=0;

    for ( int i=0; i < user_input.length(); i++)
    {
       //Finding the correct characters at the same spot.
       if(user_input.charAt(i)==rword.charAt(i))
        {
            correct_characters_at_same_spot=correct_characters_at_same_spot+1;
        }
       //Finding the correct characters at all postions.
       while(number<user_input.length()){
       if(user_input.charAt(number)==rword.charAt(i))
       {
            correct_characters=correct_characters+1;
       }
       number=number+1;
       }
    }
    System.out.println("Correct characters: "+correct_characters);
    System.out.println("Correct characters at same spot: "+correct_characters_at_same_spot);
}




   public static void main(String[] args) {

        int random_word_leght=2;
        //Generates random word used in game. Lengt passed by argument.
        String rword=generate_random_word(random_word_leght);

        //When user enters the corrent answer that will switch to truth;
        //!!!
        //!!!
        boolean correct_answer=false;

while (correct_answer==false)
        {
         //Reads the word from user store it as int "input" string.
         System.out.println("Guess the word [5 characters]:");
         Scanner sc = new Scanner(System.in);
         String user_input = sc.next();

         //String user_input="aBcD";
         System.out.println(rword);
         System.out.println(user_input);

         //Count the letters position and print the output.
         count_letters(user_input,rword);

        if(count_letters.correct_characters_at_same_spot == count_letters.user_input.length){
             correct_answer==true;
             System.out.println("CORRECT: ");
        };

        }

   }

}