package eg.edu.alexu.csd.datastructure.hangman.cs69;
import java.util.Random;
import eg.edu.alexu.csd.datastructure.hangman.IHangman;
public class Hangman implements IHangman {
    String[] dict;
    int arrSize = 0, maxGuesses;
    int wrongGuesses = 0;
    static String word = "",sec = "";
    static char[] res;
    @Override
    public void setDictionary(String[] words) {
        dict = words;
        if(words != null)arrSize = words.length;
    }

    @Override
    public String selectRandomSecretWord() {
        if(arrSize == 0 || dict == null)return null;
        Random ran = new Random();
        int index = ran.nextInt(arrSize);
        word = dict[index].toUpperCase();
        sec = dict[index];
        int len = dict[index].length();
        if(len != 0 && word!= null){
            res = new char[len];
            for(int i = 0 ; i < len ; i++)res[i] = '-';
        }
        return sec;
    }


    @Override
    public String guess(Character c) {
        if(wrongGuesses >= maxGuesses || dict == null)return null;
        if(c == null)return String.valueOf(res);
        c = Character.toUpperCase(c);
        if(word.length() == 0 )return "";
        if(word.indexOf(c) == -1)
        {
            wrongGuesses++;
            if(wrongGuesses == maxGuesses)return null;
            return String.valueOf(res);
        }
        else
        {
            int pos = -1;
            while(word.indexOf(c,pos+1) != -1 )
            {
                pos = word.indexOf(c,pos+1);
                res[pos] = sec.charAt(pos);
            }
            return String.valueOf(res);
        }
    }

    @Override
    public void setMaxWrongGuesses(Integer max) {
        if(max == null){maxGuesses = 0;
        return;
    }
        maxGuesses = max;
    }

}