package com.hangman;

import java.util.ArrayList;

import java.util.List;

import java.util.Observable;

public class HangmanGame extends Observable implements Game {

static int MaxIncorrectGuesses = 9;

private int incorrectGuesses;

private List<Character> answer;

private List<Character> correctGuesses;

private AnswerGenerator answerGenerator = new RandomAnswerGeneratorFromList();

public HangmanGame()

{

correctGuesses = new ArrayList<>();

incorrectGuesses = 0;

}

@Override

public boolean isOver()

{

return incorrectGuesses >= MaxIncorrectGuesses || isWinner();

}

@Override

public void guess(char guess)

{

if (isIncorrect(guess))

incorrectGuesses++;

else {

correctGuesses.add(Character.toLowerCase(guess));

}

setChanged();

notifyObservers();

}

@Override

public List<Character> currentClue()

{

List<Character> clue = new ArrayList<>();

for (int i = 0; i < answer().size(); i++) {

Character c = answer().get(i);

if (correctGuesses.contains(c))

clue.add(c);

else

clue.add(null);

}

return clue;

}

@Override

public boolean isWinner()

{

return correctGuesses.containsAll(this.answer());

}

@Override

public int numGuesses() {

return incorrectGuesses + correctGuesses.size();

}

public void setAnswerGenerator(AnswerGenerator answerGenerator) {

this.answerGenerator = answerGenerator;

}

private boolean isIncorrect(char guess) {

return !this.answer().contains(guess) || this.correctGuesses.contains(guess);

}

protected List<Character> answer() {

if (answer == null) {

answer = new ArrayList<>();

for (Character c : answerGenerator.generateAnswer().toLowerCase().toCharArray())

answer.add(c);

}

return answer;

}

}