public class hangPhrase {
/* This program monitors a game of hangPhrase, which is sort of a
   merger of the games Hangman and Wheel of Fortune.  A player enters 
   a word or phrase and the second tries to guess it, one letter at  
   a time.  The program keeps track of the guesses and displays the
   letters in the phrase that have been located so far.  The game is
   over when the second player guesses the phrase or makes 6 incorrect
   guesses.  
   
   After each guess, the method "showGallows" inside the
   Gallows class is called to display a partially-hanged player,
   according to the number of wrong guesses that have been made 
   so far: 
        1 = the head, 2 = the head and torso, 
        3 and 4 add an arm, and 
        5 and 6 add a leg.  
   showGallows also displays in that window the partially-guessed
   phrase and the letters that the player has used so far.
*/

	// Obtain a secret phrase from the user and wipe it off the screen
	static String getSecretPhrase () {	
		System.out.println("Enter a secret phrase to be guessed: ");
		String secretPhrase = Keyboard.readString();
		for (int i=0; i<30; i++)          // clear the text window
			System.out.println();
		return secretPhrase;
	}

	// Prompt the user to enter the next letter, checking that it
	// hasn't already been guessed
	static char getNextGuess (String lettersUsed) {
		System.out.println("Enter the next letter: ");
		String nextLetter = Keyboard.readString();
		while (lettersUsed.indexOf(nextLetter.charAt(0)) >= 0 || nextLetter.length()!=1) {
			System.out.println("Letter already guessed or invalid; try again: ");
		    nextLetter = Keyboard.readString();
		}
		return nextLetter.charAt(0);
	}

	static String updatePhrase(String pp, String sp, char nl) {
	// Return the String that results from replacing each character pp[i]
	// by nl for which nl == sp[i], for 0 <= i < sp.length().  That is,
	// all occurrences of '-' in pp that correspond to occurrences of nl
	// in sp are replaced by nl.
	   
	   for (int i=0; i<sp.length(); i++) 
	     if (nl == sp.charAt(i))
	        pp = pp.substring(0, i) + nl + pp.substring(i+1);
	   return pp;    
	}

    public static void main(String[] args) {
	
		String lettersUsed,   // the letters already guessed,  e.g. "lex"
		       secretPhrase,  // the secret phrase,            e.g, "hello there"
		       partialPhrase; // the partially-guessed phrase, e.g. "-ell- --e-e"
		int    wrongGuesses;  // the number of wrong guesses,  e.g. 1
		char nextLetter;      // next letter guessed,          e.g. 'h'

		secretPhrase = getSecretPhrase();
		partialPhrase = "";
		for (int i=0; i<secretPhrase.length(); i++)  // initialize the partial phrase 
	      if (secretPhrase.charAt(i) != ' ')
			partialPhrase = partialPhrase + "-"; 
		  else 
		    partialPhrase = partialPhrase + " "; // show spaces between words
		lettersUsed = "";
		wrongGuesses = 0;
		Gallows g = new Gallows(300, 10);      // open the gallows window
											   // and show the state of the game
		g.showGallows(partialPhrase, wrongGuesses, lettersUsed);
		while (wrongGuesses < 6 && !partialPhrase.equals(secretPhrase)) {
  			nextLetter = getNextGuess(lettersUsed);
  			lettersUsed = lettersUsed + nextLetter;
			if (secretPhrase.indexOf(nextLetter) < 0) // guessed letter not there
				wrongGuesses = wrongGuesses + 1;
			else
				partialPhrase = updatePhrase(partialPhrase, secretPhrase, nextLetter);
			g.showGallows(partialPhrase, wrongGuesses, lettersUsed);
		}
        // The game is over if either of the two conditions in the while loop
        // becomes false.  Now report the outcome of the game.
		if (wrongGuesses == 6)
			System.out.println("Sorry, you\'re hanged. ");
		else
			System.out.println("Congratulations, you win !");
			
		
	}
}