import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.Scanner;

/**
 *
 * @author MeneXia (Xavi Ablaza)
 *
 */

  static Scanner in;
  static String[] board;
  static String turn;

  public static void main(String[] args) {
    in = new Scanner(System.in);
    board = new String[9];
    turn = "X";
    String winner = null;
    populateEmptyBoard();

    System.out.println("Tic Tac Toe");
    System.out.println("By Mina Awadalla");
    printBoard();
    System.out.println("X's will go first. Enter a number to place X in:");

    while (winner == null) {
      int numInput;
      try {
        numInput = in.nextInt();
        if (!(numInput > 0 && numInput <= 9)) {
          System.out.println("Invalid input; re-enter slot number:");
          continue;
        }
      } catch (InputMismatchException e) {
        System.out.println("Invalid input; re-enter slot number:");
        continue;
      }
      if (board[numInput-1].equals(String.valueOf(numInput))) {
        board[numInput-1] = turn;
        if (turn.equals("X")) {
          turn = "O";
        } else {
          turn = "X";
        }
        printBoard();
        winner = checkWinner();
      } else {
        System.out.println("Slot already choosen; pick another number:");
        continue;
      }
    }
    if (winner.equalsIgnoreCase("draw")) {
      System.out.println("It's a tie! PLAY AGAIN.");
    } else {
      System.out.println("Congratulations! " + winner + "'s have won!");
    }
  }

  static String checkWinner() {
    for (int a = 0; a < 8; a++) {
      String line = null;
      switch (a) {
      case 0:
        line = board[0] + board[1] + board[2];
        break;
      case 1:
        line = board[3] + board[4] + board[5];
        break;
      case 2:
        line = board[6] + board[7] + board[8];
        break;
      case 3:
        line = board[0] + board[3] + board[6];
        break;
      case 4:
        line = board[1] + board[4] + board[7];
        break;
      case 5:
        line = board[2] + board[5] + board[8];
        break;
      case 6:
        line = board[0] + board[4] + board[8];
        break;
      case 7:
        line = board[2] + board[4] + board[6];
        break;
      }
      if (line.equals("XXX")) {
        return "X";
      } else if (line.equals("OOO")) {
        return "O";
      }
    }

    for (int a = 0; a < 9; a++) {
      if (Arrays.asList(board).contains(String.valueOf(a+1))) {
        break;
      }
      else if (a == 8) return "draw";
    }

    System.out.println(turn + "'s turn; enter a slot number to place " + turn + " in:");
    return null;
  }

  static void printBoard() {
    System.out.println("/---|---|---\\");
    System.out.println("| " + board[0] + " | " + board[1] + " | " + board[2] + " |");
    System.out.println("|-----------|");
    System.out.println("| " + board[3] + " | " + board[4] + " | " + board[5] + " |");
    System.out.println("|-----------|");
    System.out.println("| " + board[6] + " | " + board[7] + " | " + board[8] + " |");
    System.out.println("/---|---|---\\");
  }

  static void populateEmptyBoard() {
    for (int a = 0; a < 9; a++) {
      board[a] = String.valueOf(a+1);
    }
  }