import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.Frame;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class Connect4GameApp extends Frame implements MouseListener
{
    Board board;
    Player[] player;
    String message="Turn No. 1 Red's Move";
    String comment="No Comment";
    String score="New Game";
    int turn=1;
    private final int left=20;
    private final int top=80;
    private final int boxSize=60;
    public  Connect4GameApp()
    {
        super("Connect 4");
        setSize(500,500);
        player = new Player[2];
        player[0]=new Player("Red", Color.RED);
        player[0].setRobot(false);
        player[1]= new Player("Black", Color.BLACK);
        player[1].setRobot(false);

        board= new Board();
        board.setCellSize(boxSize);

        addMouseListener(this);
        this.addWindowListener(new WindowListener() {
                public void windowClosing(WindowEvent e) {System.exit(0);}

                public void windowClosed(WindowEvent e) {}

                public void windowOpened(WindowEvent e) {}

                public void windowIconified(WindowEvent e) {}

                public void windowDeiconified(WindowEvent e) {}

                public void windowActivated(WindowEvent e) {}

                public void windowDeactivated(WindowEvent e) {}
            }); 
    }

    public void paint(Graphics g)
    {

        g.setColor(Color.white);
        g.fillRect(0, 0, 500, 500);
        g.setColor(Color.black);
        g.drawString("Connect 4 Game", 20, 20);
        g.setColor(Color.blue);
        g.drawString("click to see next turn", 20, 40);
        g.drawString(message , left, 65);
        g.drawString(comment , left, 490);
        g.drawString(score , left, 470);
        board.draw(g, left, top);

    }

    public boolean gameOver(){
        return (board.legalMoves().size()==0 
            || board.hMax()>3
            || board.vMax()>3
            || board.dMax()>3);
    }

    public static void main(String[] args)
    {
        Connect4GameApp app= new Connect4GameApp();
        app.setVisible(true);
    }

    public void mouseClicked(MouseEvent e) {}

    public void mouseEntered(MouseEvent e) {}

    public void mouseExited(MouseEvent e) {}

    public void mousePressed(MouseEvent e) {	}

    public void mouseReleased(MouseEvent e) {
        int click=e.getX();
        click-=left;
        int selectedCol=click/boxSize;
        if (selectedCol>6)
            selectedCol=6;
        if (!gameOver()){
            turn++;
            message="Turn No. "+turn+" ";
            Color c=player[turn%2].getColor();
            if (player[turn%2].isRobot()){
                selectedCol=player[turn%2].getMove(board.legalMoves());
                board.add(new Piece(c, board.columnTop(selectedCol) ,selectedCol));
            }else{
                if(board.legalMoves().contains(selectedCol)){
                    board.add(new Piece(c, board.columnTop(selectedCol) ,selectedCol));
                }else{
                    message+="Illegal move - still ";
                    turn--;
                }
            }

            if (gameOver())
                message=player[turn%2].getName()+" WON!";
            else
                message+=player[(turn-1)%2].getName()+"'s move";

        } else{
            message="Game Over";
        }
        comment="Last Selected Column: "+selectedCol+" (top is "+board.columnTop(selectedCol);
        comment+= ") legal Moves: "+board.legalMoves();
        score="horiz Max="+board.hMax()+" vert max="+board.vMax()+" diag max="+board.dMax();
        repaint();

    }
}