GameLogic.java

package ticTacToe;


public class GameLogic {

    private GridValue turn = GridValue.X;
    private GameState state = GameState.PLAYING;
    private int turnCount = 0;

    private GridValue[][] board = new GridValue[3][3];

    public GameLogic(){
        for (int row = 0; row < 3; row++) {
            for (int col = 0; col < 3; col++) {
                board[row][col] = GridValue.EMPTY;  // Set each cell to EMPTY
            }
        }
    }

    public GridValue getTurn(){
        return this.turn;
    }

    public GameState getState(){
        return this.state;
    }

    public void changeTurn(){
        turn = (turn == GridValue.X) ? GridValue.O : GridValue.X;
    }

    public void win(GridValue turn){
        if(turn == GridValue.X){
            state = GameState.XWIN;
        } else {
            state = GameState.OWIN;
        }
    }

    public void draw(){
        state = GameState.DRAW;
    }

    public void resultCheck(int row, int col){

        //row
        if(board[row][0] == turn &&
           board[row][1] == turn &&
           board[row][2] == turn){
            win(turn);
        }
        //column
        else if(board[0][col] == turn &&
                board[1][col] == turn &&
                board[2][col] == turn){
            win(turn);
        }
        //diagonal
        else if(row == col &&
                board[0][0] == board[1][1] &&
                board[0][0] == board[2][2]){
            win(turn);
        }
        //other diagonal
        else if(row + col == 2 &&
                board[2][0] == board[1][1] &&
                board[2][0] == board[0][2]){
            win(turn);
        }
        //draw
        else if(turnCount == 9){
            draw();
        }
    }

    public boolean makeMove(int row, int col){
        if(board[row][col] != GridValue.X && board[row][col] != GridValue.O && state == GameState.PLAYING){
            board[row][col] = this.turn;
            turnCount++;
            resultCheck(row, col);
            return true;
        }
        return false;
    }
}