GameEngine

import java.awt.Button;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JButton;

public class TicTacEngine implements ActionListener {

	TicTac parent;

	TicTacEngine (TicTac parent){
		this.parent=parent;
	}

	public void actionPerformed (ActionEvent e){
		Button theButton = (Button) e.getSource();

		if (theButton == parent.newGameButton){
			for (int i=0; i<9; i++) {
				parent.squares[i].setEnabled(true);
				parent.squares[i].setLabel("");
				parent.squares[i].setBackground(Color.ORANGE);
			}

			parent.emptySquaresLeft=9;
			parent.score.setText("Твой ход!");
			parent.newGameButton.setEnabled(false);
			return;
		}

		String winner="";

		for (int i=0; i<9; i++) {
			if (theButton == parent.squares[i]){
				parent.squares[i].setLabel("X");
				winner = lookForWinner();
				parent.squares[i].setEnabled(false);

				if (!"".equals(winner)) {
					endTheGame ();
				} else {
					computerMove();
					winner = lookForWinner();

					if (!"".equals(winner)) {
						endTheGame();
					}
				}
				break;
			}
		}
	if (winner.equals("X")) {
		parent.score.setText("Ты победил, красавчик!");
		parent.won++;
		parent.wonScore.setText("Побед: "+parent.won);
	} else if (winner.equals("O")) {
		parent.score.setText("Лох, пидр!");
		parent.lose++;
		parent.loseScore.setText("Поражений: "+parent.lose);
	} else if (winner.equals("T")) {
		parent.score.setText("Победила дружба. Ыыыы.");
	}
}
	String lookForWinner() {
		String theWinner="";
		parent.emptySquaresLeft--;
			if (parent.emptySquaresLeft == 0) {
				return "T";
			}

if (!parent.squares[0].getLabel().equals("")&&
		parent.squares[0].getLabel().equals(parent.squares[1].getLabel()) &&
		parent.squares[0].getLabel().equals(parent.squares[2].getLabel())) {
	theWinner = parent.squares [0].getLabel();
	highlightWinner(0,1,2);

	} else if (!parent.squares[3].getLabel().equals("")&&
			parent.squares[3].getLabel().equals(parent.squares[4].getLabel()) &&
			parent.squares[3].getLabel().equals(parent.squares[5].getLabel())) {
		theWinner = parent.squares [3].getLabel();
		highlightWinner(3,4,5);

	} else if (!parent.squares[6].getLabel().equals("")&&
			parent.squares[6].getLabel().equals(parent.squares[7].getLabel()) &&
			parent.squares[6].getLabel().equals(parent.squares[8].getLabel())) {
		theWinner = parent.squares[6].getLabel();
		highlightWinner(6,7,8);

	} else if (!parent.squares[0].getLabel().equals("")&&
			parent.squares[0].getLabel().equals(parent.squares[3].getLabel()) &&
			parent.squares[0].getLabel().equals(parent.squares[6].getLabel())) {
		theWinner = parent.squares [3].getLabel();
		highlightWinner(0,3,6);

	} else if (!parent.squares[1].getLabel().equals("")&&
			parent.squares[1].getLabel().equals(parent.squares[4].getLabel()) &&
			parent.squares[1].getLabel().equals(parent.squares[7].getLabel())) {
		theWinner = parent.squares [1].getLabel();
		highlightWinner(1,4,7);

	} else if (!parent.squares[2].getLabel().equals("")&&
			parent.squares[2].getLabel().equals(parent.squares[5].getLabel()) &&
			parent.squares[2].getLabel().equals(parent.squares[8].getLabel())) {
		theWinner = parent.squares [2].getLabel();
		highlightWinner(2,5,8);
} else if (!parent.squares[0].getLabel().equals("")&&
		parent.squares[0].getLabel().equals(parent.squares[4].getLabel()) &&
		parent.squares[0].getLabel().equals(parent.squares[8].getLabel())) {
	theWinner = parent.squares [0].getLabel();
	highlightWinner(0,4,8);
} else if (!parent.squares[2].getLabel().equals("")&&
		parent.squares[2].getLabel().equals(parent.squares[4].getLabel()) &&
		parent.squares[2].getLabel().equals(parent.squares[6].getLabel())) {
	theWinner = parent.squares [2].getLabel();
	highlightWinner(2,4,6);
}
return theWinner;
}

void computerMove() {
	int selectedSquare;

	selectedSquare = findEmptySquare("O");

	if (selectedSquare == -1)
		selectedSquare = findEmptySquare("X");

	if ((selectedSquare == -1) && (parent.squares[4].getLabel().equals(""))) {
		selectedSquare=4;
	}

	if (selectedSquare == -1) {
		selectedSquare = getRandomSquare();
	}
	parent.squares[selectedSquare].setLabel("O");
	parent.squares[selectedSquare].setEnabled(false);
}

int findEmptySquare(String Player) {
	int weight[] =new int[9];
	for (int i=0; i<9; i++) {
		if (parent.squares[i].getLabel().equals("O"))
			weight[i]=-1;
		else if (parent.squares[i].getLabel().equals("X"))
			weight[i]=1;
		else
			weight[i]=0;
	}

	int twoWeights = Player.equals("O") ? -2 : 2;
	if (weight[0] + weight[1] + weight[2] == twoWeights) {
		if (weight[0] == 0)
			return 0;
		else if (weight[1] == 0)
			return 1;
		else
			return 2;
	}

	if (weight[3] + weight[4] + weight[5] == twoWeights) {
		if (weight[3] == 0)
			return 3;
		else if (weight[4] == 0)
			return 4;
		else
			return 5;
	}

	if (weight[6] + weight[7] + weight[8] == twoWeights) {
		if (weight[6] == 0)
			return 6;
		else if (weight[7] == 0)
			return 7;
		else
			return 8;
	}

	if (weight[0] + weight[3] + weight[6] == twoWeights) {
		if (weight[0] == 0)
			return 0;
		else if (weight[3] == 0)
			return 3;
		else
			return 6;
	}

	if (weight[1] + weight[4] + weight[7] == twoWeights) {
		if (weight[1] == 0)
			return 1;
		else if (weight[4] == 0)
			return 4;
		else
			return 7;
	}

	if (weight[2] + weight[5] + weight[8] == twoWeights) {
		if (weight[2] == 0)
			return 2;
		else if (weight[5] == 0)
			return 5;
		else
			return 8;
	}

	if (weight[2] + weight[4] + weight[6] == twoWeights) {
		if (weight[2] == 0)
			return 2;
		else if (weight[4] == 0)
			return 4;
		else
			return 6;
	}
	if (weight[0] + weight[4] + weight[8] == twoWeights) {
		if (weight[0] == 0)
			return 0;
		else if (weight[4] == 0)
			return 4;
		else
			return 8;
	}
	return -1;
}

int getRandomSquare() {
	boolean gotEmptySquare = false;
	int selectedSquare = -1;
	do {
		selectedSquare=(int) (Math.random()*9);
		if (parent.squares[selectedSquare].getLabel().equals("")) {
			gotEmptySquare = true;
		}
	} while (!gotEmptySquare );

	return selectedSquare;
}

void highlightWinner (int win1, int win2, int win3) {
	parent.squares[win1].setBackground(Color.CYAN);
	parent.squares[win2].setBackground(Color.CYAN);
	parent.squares[win3].setBackground(Color.CYAN);
}

void endTheGame () {
	parent.newGameButton.setEnabled(true);
	for (int i=0; i<9; i++) {
		parent.squares[i].setEnabled(false);
	}
}
}