/**

 * A TicTacToe Program.

 * @author

 */

import java.util.Scanner;

public class TicTacToe {

  public static String[][] board;

  public static String currentPlayer= "X";

  public static Scanner reader = new Scanner(System.in);

  public static void main(String[] args) {

    playGame();

  }

  /** Plays the game of TicTacToe. Stops when either 1) a player

    * wins or 2) no spaces are left on the board.

    */

  public static void playGame() {

    initPlayer(); // pick starting player

    initBoard(); // initialize the board

    int moves = 0;

    boolean hasWon = false;

    while (moves < 9 && !hasWon ) {

      if (currentPlayer.equals("X")) userTurn();

      else computerTurn();

      printBoard();

      hasWon = checkWin(); // has a player won?

      swapPlayer(); // swap the currentPlayer

      moves++;

    }

    if (!hasWon) System.out.println("No one won.");

  }

  /* Create a board and initialize the values to all blanks.

   * Print the board.

   * Note, each board position is either:

   * "X" - this is the user

   * "O" - this is the computer

   * " " - a space indicates the position is empty

   */

  public static void initBoard() {

// your code goes here

  }

  /** Swap the current player. That is, if the current

    * player is "X", it is swapped to be "O", and vice versa.

    */

  public static void swapPlayer() {

    if (currentPlayer.equals("X")) currentPlayer = "O";

    else currentPlayer = "X";

  }

  /** Randomly pick which player (user or computer) goes first.

    * Set the currentPlayer to the first player.

    * It is assumed that the user is always "X" and the computer

    * is always "O".

    */

  public static void initPlayer() {

    System.out.println("You are X and the computer is O.");

    if (Math.random() < .5) {

      currentPlayer = "X";

      System.out.println("You are the first player.");

    }

    else {

      currentPlayer = "O";

      System.out.println("The computer is the first player.");

    }

  }

  /** Choose which position the computer will play.

    * Set that position of the board to "O"

    */

  public static void computerTurn() {

// your code goes here

  }

  /** Have the user choose which position to play.

    * Set that position of the board to "X"

    */

  public static void userTurn() {

// your code goes here

  }

  /** Checks to see if the currentPlayer has won.

    * @return true if the currentPlayer has won.

    */

  public static boolean checkWin() {

// your code goes here

    return false; // this is a placeholder so code compiles.

  }

  /** Print the board.

    */

  public static void printBoard() {

// your code goes here

  }

}