import java.util.Random;

public class Bsp07 {

    public static int count;
    public static String word = "Winter";
    public static char level = SavitchIn.readChar();

    public static void main(String[] args) {

        System.out.println("Guess a word!");
        System.out.println("Level (e(asy), m(edium), d(ifficult), q(uit)): " + level);

        setProblem(word);

        int asterisk = 1;       //am Anfang muss man immer mindestens einen Buchstaben erraten
        int versuche = 0;
        char[] help_word = cover(count);

        while(asterisk == 1) {      //es gibt noch Buchstaben zu erraten
            System.out.print("Word: ");
            System.out.println(help_word);
            System.out.print("Guess: ");
            char guess = SavitchIn.readChar();
            System.out.println();

            /*if(guess == 'q') {
                break;
            }*/

            help_word = uncover(help_word, guess);


            for(int i = 0; i < help_word.length; i++) {
                if(help_word[i] == '*') {
                    asterisk = 1;
                    break;
                } else asterisk = 0;
            }

            versuche ++;
        }

        System.out.println("Word: " + word);
        System.out.println("You made it in " + versuche + " tries!");
    }

    public static void setProblem(String word) {        //Defines the problem word to be guessed.        @param word           the "secret" word

        double help = 0;
        if(level == 'e') {
            help = 0.25;
        } else if(level == 'm') {
            help = 0.5;
        } else help = 0.75;

        count = (int) (word.length() * help);

        if(count == 0) {
            count = 1;
        }
    }

    public static char[] cover(int count) {
        char[] cover = word.toCharArray();
        Random rnd = new Random();

        int i = 0;
        while(i < count) {
            int randomIndex = rnd.nextInt(cover.length);        //erzeugt eine zufaellige ganze Zahl im Intervall [0; cover Laenge)
            if(cover[randomIndex] != '*') {
                cover[randomIndex] = '*';
                i++;
            }
        }

        return cover;
    }

    public static char[] uncover(char[] cover, char guess) {
        String guess_help = Character.toString(guess);

        char help, help_GK;
        if(guess_help.equals(guess_help.toLowerCase())) {       //Versuch ist ein Kleinbuchstabe
            help = guess_help.charAt(0);        //nur ein Buchstabe pro Versuch
            help_GK = guess_help.toUpperCase().charAt(0);
        } else {        //Versuch ist ein Grossbuchstabe
            help = guess_help.charAt(0);
            help_GK = guess_help.toLowerCase().charAt(0);
        }

        for(int i = 0; i < cover.length; i++) {
            if(word.charAt(i) == help){
                cover[i] = help;
            } else if(word.charAt(i) == help_GK){
                cover[i] = help_GK;
            }
        }

        return cover;
    }
}