import java.util.*;
/**
* A simple game of Hangman, chooses a random word, 6 guesses are allowed, the user has the option of
* playing again, and keeps track of how many games they have won.
*
* Laura Andre and Kevin Bolger
* 12/5/11
*/

public class HangMan
{

    public static int wordLength; //declares a public variable to count the number of letters in the word, static becuase it is used in both methods
    public static String word; //declares a public variable word that will one of the twenty secret words, static becuase it is used in both methods
    public int won = 0; //declare and initialize the public variable for the number of times the user wins the game, only used in Game method
    public int lost = 0; //declare and initialize the public variable for the number of times the user looses the game, only used in Game method
    public static HangMan Game = new HangMan(); //creates an public object to the method Game, static becuase it is used in both methods

    //main method
    public static void main(String [] args){
        //initial text displayed to user
        System.out.println("Welcome to the game of Hangman!");
        System.out.println("You will have 6 chances to guess what the word is.");

        Game.Game(); //calls on the method Game
    }

    //Game method
    public void Game(){
        word = null; //no initial value for the String word
        Random rand = new Random(); //initializes random number calculator
        int wordNum = rand.nextInt(19); //sets a random number value to the variable wordNum

        //creates a switch statement that assigns the numbers 0 to 20 to the String word, each with a different secret word
        switch(wordNum){
        case 0: word = "table"; break;
        case 1: word = "computer"; break;
        case 2: word = "house"; break;
        case 3: word = "desk"; break;
        case 4: word = "daring"; break;
        case 5: word = "chair"; break;
        case 6: word = "lamp"; break;
        case 7: word = "phone"; break;
        case 8: word = "chipotle"; break;
        case 9: word = "pencil"; break;
        case 10: word = "raise"; break;
        case 11: word = "upwards"; break;
        case 12: word = "movie"; break;
        case 13: word = "fresh"; break;
        case 14: word = "yield"; break;
        case 15: word = "savor"; break;
        case 16: word = "drive"; break;
        case 17: word = "brick"; break;
        case 18: word = "orange"; break;
        case 19: word = "great"; break;
        }

        StringBuilder userWord = new StringBuilder(wordLength); //builds a String userWord that will be the blanks that user fills in by inputting the correct letters of word

        wordLength = word.length(); //the variable word length is equal to the specific number of characters in whichever word is randomly chosen

        //for loop that assigns an underscore to indicate each of the characters in the randomly chosen word
        for(int i = 0; i < wordLength; i++){
            userWord.append('_');
            userWord.append(' ');
        }



        System.out.println("Your word is " + wordLength + " letters long. \n"); //tells the user the length of the randomly chosen word
        int maxTries = 6; //sets the value for the variable maxTries, the user gets six guesses to guess the word
        StringBuilder guessedLetters = new StringBuilder(); //builds the String that will show the user the letters they have guessed
        int correct = 0; //sets the initial value to zero for the variable that will indicate how many letters the user has guessed correctly
        String guessLetter; //variable for the letter that the user inputs as a guess

        int right = 0; //sets the initial value to zero
        //while loop that repeats while the maxTries is greater than zero AND when the number of correct guesses is less than the number of letters in the secret word
        while(maxTries > 0 && correct<wordLength){
            System.out.println("The letters that you have guessed are: " + guessedLetters); //displays which letters the user has already guessed
            System.out.print("What is your guess? "); //asks the user for their guess
            Scanner input = new Scanner(System.in); //initializes the scanner
            guessLetter = input.nextLine(); //sets the user's guess to the String guessLetter
            System.out.print("\n");
            guessedLetters.append(guessLetter + " "); //appends the String guessedLetters to add the user's last guess to the list of guessed letters

            right = 0; //resets initial value to zero inside of while loop

            //for loop repeats while i is less than the number of letters in the secret word
            for(int i = 0; i < wordLength; i++){
                //if statement for when the user guesses the correct letter
                if(guessLetter.charAt(0) == word.charAt(i))
                {
                    userWord.setCharAt(2*i, guessLetter.charAt(0)); //sets the correct guessed letter to the correct spot in the userWord that the user is building
                    correct++; //increases value by one
                    right++; //increases value by one

                    System.out.println("Correct!" + "\n"); //tells user that their guess was correct
                    System.out.println(userWord + "\n"); //prints out how much of the userWord the user has built so far
                } //ends if statement
            } //ends for loop

            //if statement for when the user's guess is incorrect
            if(right == 0){ //the right guess will still be zero because it was an incorrect guess
                maxTries--; //decreases the number of guesses the user has left by one
                System.out.println("Incorrect, you now have " + maxTries + " wrong guesses left.\n"); //tells the user that the guess was incorrect and how many guesses they have left
                System.out.println(userWord + "\n"); //prints out how much of the userWord the user has built so far
            } //ends if statement
        } //ends while loop

        System.out.println(userWord + "\n"); //prints out how much of the userWord the user has built so far

        System.out.println("The word was: " + word); //tells the user what the secret word was that they were trying to guess
        //creates an if statement that will keep track of the user's score, how many games they have won and lost
        if(maxTries == 0){ //condition: when the user runs out of guesses
            lost++; //they lost that game, so increases the number of loses by one
        }else{ //if they have guesses left, that means that they guessed the word correctly
            won++; //meaning they won the game, so number of wins increases by one
        }
        System.out.println("\nScoreboard: \nWins: " + won + "\nLoses: " + lost + "\n"); //displays the scoreboard to the user

        String answer; //creates a variable for the user's answer to whether or not they want to play again

        System.out.println("Would you like to play again, yes or no?\n");
        Scanner input = new Scanner(System.in); //initializes scanner
        answer = input.nextLine(); //sets the user's answer to the variable
        //creates an if statement to figure out whether or not to repeat the method Game
        if(answer.equalsIgnoreCase("yes")){ //condition: if the user's answer is yes
            Game.Game(); //the method Game will repeat
        }else{ //if not, then the user doesnt want to play again and quits the program
            System.out.println("Thanks for playing!");
        } //ends if statement
    } //ends Game method
} //ends class HangMan