import javax.swing.JOptionPane;
import java.io.IOException;
import java.util.*;

//**java.util.* produces a random digit*/

public class Main {

    public static void main(String[] args) {
        int x = 0;
        int a = 0;
        int b = 0;
        int c = 0;
        int d = 0;
        int e = 0;
        int f = 0;
        int z = 0;
        int j = 1;
        int g = 0;
        int l = 1;
        int m = 1;
        int i = 0;
        int h = 0;
        int numArray[]= new int[4];
        int randomArray[]=new int[4];
        String input = "";
        while(j > 0){
            try{
                input=JOptionPane.showInputDialog("CODEBREAKER \n Level of Difficulty \n 1 - Easy \n 2 - Average \n 3 - Difficult");
                x=Integer.parseInt(input); //**level of difficulty */    
                Random random = new Random();
                while(m > 0){
                    while (i != 4){
                        randomArray[i]=random.nextInt(10);
                        i++;
                     }if(randomArray[0] == randomArray[1] | randomArray[0] == randomArray[2] | randomArray[0] == randomArray[3]){
                        m++;
                     }else if(randomArray[1] == randomArray[2] | randomArray[1] == randomArray[3]){
                        m++;
                     }else if(randomArray[2] == randomArray[3]){
                        m++;
                     }else{
                        m=0;
                     }
                }//**Produces a random number,checks if it is unique within the set */
                JOptionPane.showMessageDialog(null,"random array = "+randomArray[0]+randomArray[1]+randomArray[2]+randomArray[3]);
                if(x == 1){
                    a = 10;
                }else if (x == 2){
                    a = 7;
                }else if (x == 3) {
                    a = 4;
                }else {
                    System.out.println("Invalid choice.");
                }j = 0;
            }catch(NumberFormatException re){
                    JOptionPane.showMessageDialog(null, "Invalid Input.");
                j++;
            }  
    }//** checks the level of difficulty and invalid inputs. */
        while ( l > 0){
            try{
                while (b != a){
                    c = c + 1;
                    d=0;
                    while (d != 4){
                    input=JOptionPane.showInputDialog("Try # " +c+ ", Enter guess");
                    numArray[d]=Integer.parseInt(input);
                    g = 0;
                    h = 0;
                    d++;
                    }//** Receives input, puts it in an array. */
                    d=0;    
                    while (d != 4){
                        f=0;
                        while (f != 4){
                            if (randomArray[f] == numArray[d]){
                            if (f == d){
                                    g = g +1;
                                }else{
                                    h = h + 1;
                                }
                        }
                            f++;
                        }d++; //** Compares input with the random numbers, produces markers. *//  
                        }if (numArray[0] == numArray[1] && g > 0){
                            h = h - 1;
                        }if (numArray[1] == numArray[2] && g > 0){
                            h = h - 1;
                        }if (numArray[2] == numArray[3] && g > 0){
                            h = h - 1;
                        }//** checks for repeated/overlapping digits */
                        if(g == 4){
                            JOptionPane.showMessageDialog(null, "YOU WIN!");
                            System.exit(0);
                        }else{
                            JOptionPane.showMessageDialog(null, g+ " Black, " +h+ " White");
                        }//** output */
                        b++;
                    }JOptionPane.showMessageDialog(null, "sorry, you lose.");
                    System.exit(0);
                    
            }catch(NumberFormatException er){
                JOptionPane.showMessageDialog(null, "Invalid input.");
            }l++;
            }
        }
    
    }