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

/**
 * The classic Game described at U of Washington Description:
 * https://sites.math.washington.edu/~mathcircle/mmc/mmc2010/PicoFermiBagel.pdf
 * @author Chris Thiel, ofmCap
 * @version May 28, 2021;
 */

public class PicoFermiBagel {
	
	private int[] code;
	
	/* Constructors */
	public PicoFermiBagel() {
		this(3);
	}
	public PicoFermiBagel(int size)
	{	 
		 code = new int[size];
		 // make a random code:
		 // makeNonRepeatingCode();
		 // or set the code for testing clues:
		 code = intToArray(489);
	}
	private int[] intToArray(int n) {
		int size = ("" + n).length();
		int[] arr = new int[size];
		for(int d = size-1; d >=0; d--) {
			arr[d] = n % 10;
			n /= 10;
		}
		return arr;
	}
	/**
	 * makeNonRepeatingCode() will fill the secret 
	 * code array with random digits that have
	 * no two alike
	 */
	public void makeNonRepeatingCode() {
		// your code here
		//the first digit cannot be zero
	}
	public void makeRepeatingCode() {
		code[0] = 1 + (int)(9*Math.random()); // first digit cannot be a 0
		for(int i = 1; i < code.length; i++) {
			code[i] =(int)(10 * Math.random());			
		}
	}
	/**
	 *  The clue method is like the U of W description:
	 *     "Bagel" returned if no digit correct
	 *     "Pico" for every digit found in the wrong place
	 *     "Fermi" for every digit found in the right place
	 *  
	 *  eg.: if the code is "489," the clue for guess "418"
	 *  would be "Pico Firmi"  (the 8 is the Pico, the 4
	 *  is the Firmi, but the guesser would not know which
	 *  digit caused which clue).
	 */
	public String clue(int guess) {
	    if ( (""+guess).length() != code.length)
			return " Your guess should have " + code.length + " digits.";
		// replace with your code 
		return "clue code not yet written";
	}
	/**
	 * clueForKids gives better clues for kids
	 * A clue for every digit is given in the correct order
	 * 
	 * eg.: If the code is "489" the clue for guess "418"
	 * would be "Firmi Bagel Pico" so the kid would know
	 * the 4 is correct, the 1 is incorrect and the 8 
	 * is in the wrong position
	 * 
	 * @param guess
	 * @return
	 */
	public String clueForKids(int guess) {
	    if ( (""+guess).length() != code.length)
			return " Your guess should have " + code.length + " digits.";
		return "clueForKids code not yet written";
		// replace with your code
	}
	public boolean correct(int guess) {
		return guess == code();
	}
	
	/**
	 * @param n a single digit number
	 * @return true if n is in the code array
	 */
	private boolean isPico(int n) {
		for (int d:code)
			   if (n == d)
				   return true;
		return false;
	}
	/**
	 * code() converts the int array into an int
	 * @return an int that represents the secret code
	 */
	public int code() {
		int c = 0;
		for (int d = 0; d < code.length; d++) {
			c = 10*c + code[d];
		}
		return c;
	}
	/* Static Methods */
    public static int ask(Scanner kb, String question) {
    	System.out.print(question+" ");
    	String answer = kb.nextLine();
    	return Integer.parseInt(answer);
    }
	public static void main(String[] args) {
		Scanner kb = new Scanner(System.in);
		System.out.print("Welcome to Pico, Fermi, Bagel!");
		
		PicoFermiBagel game = new PicoFermiBagel();
		System.out.println ("diag: ("+ game.code() +")");
		int guessCount = 1;
		int guess = ask(kb, "Guess a 3 digit number:");
		System.out.println( game.clue(guess)+"\n" );
		while (!game.correct(guess)) {
			guessCount++;
			guess = ask(kb, "Guess a 3 digit number:");
			System.out.println( game.clue(guess)+"\n" );
		}
		System.out.println("It took you "+ guessCount+" guesses");
	}
	
}