// Chips.java
// Sample solution to Lab #1. Written by THC.
// Plays the game of chips. Originally there are 99 chips in a pile, but
// in fact we allow the players to enter the number. The first player removes
// any number of chips from the pile, leaving at least half of them. From then
// on, the players alternate removing chips from the pile until it is empty.
// The number of chips removed in each turn must be at least 1 and at most
// twice the number removed by the other player in the previous turn.
// At the end of the game, the player with an even number of chips is the
// winner.

// This version uses dialog boxes.  Since it's not really clear what it
// means to "cancel" a dialog box when a choice is required, this program
// throws an exception when a "cancel" button is pressed.

import javax.swing.JOptionPane;

public class Chips {
  public static void main(String[] args) {
    int response;

    do {
      playAGame();

      response = JOptionPane.showConfirmDialog(null, "Play another game?");
    }
    while (response == JOptionPane.YES_OPTION);
  }

  private static void playAGame() {
    Referee official = new Referee(); // Make a new game and initialize it.
    int move; // Number of chips removed in a turn

    // The main loop makes moves until the game is over.
    while (!official.saysGameIsOver()) {
      String stateMessage = official.describeState();
      move = official.getLegalMove(stateMessage);
      official.updateState(move);
    }

    // All done, so announce the winner.
    official.announceWinner();
  }
}