import java.awt.*;
import javax.swing.*;
import java.awt.event.*; // needed for event handling
import java.awt.Toolkit;
import java.util.Timer;
import java.util.TimerTask;
import java.util.Date;
import java.awt.BorderLayout;

public class DrawGame extends JPanel implements KeyListener, ActionListener {
  // This attribute keeps track of the number of "time steps" the
  // program has taken so far. At each time step, the snakes should
  // move, we should check for intersections, and check for keyboard events,
  // etc. This attribute is really just for convenience in debugging,
  // and is not needed for the functioning of the game.
  int totalTimeSteps=0;

  Toolkit toolkit;
  Timer timer;

  Snake snake = new Snake();

  JButton quit = new JButton("Quit");
  JTextField typingArea;

  boolean oval = true;

  public DrawGame() {
    // First thing to do: Start up the periodic task:
    System.out.println("About to start the snake.");
    startSnake(200);   // Argument is number of milliseconds per snake move.
    System.out.println("Snake started.");

    setBackground(Color.yellow);
    this.add(quit); // place button in panel
    quit.addActionListener(this); // panel is listener for button

    typingArea = new JTextField(20);
    typingArea.addKeyListener(this);
    add(typingArea, BorderLayout.PAGE_START);

  }

  public void startSnake(int milliseconds) {
    toolkit = Toolkit.getDefaultToolkit();
    timer = new Timer();
    Date firstTime = new Date();  // Start task now.
    timer.schedule(new AdvanceTheSnakeTask(), firstTime, milliseconds);
  }

  class AdvanceTheSnakeTask extends TimerTask {
    public void run() {

      // Put stuff here that should happen during every advance.
      //toolkit.beep();

      snake.move();

      repaint();
    }
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);

    snake.paint(g);
  }

  public void keyTyped(KeyEvent e) {
    if (e.getKeyChar()=='a') {
      snake.dirX=-1;
      snake.dirY=0;
    }
    if (e.getKeyChar()=='s') {
      snake.dirX=1;
      snake.dirY=0;
    }
    if (e.getKeyChar()=='w') {
      snake.dirX=0;
      snake.dirY=-1;
    }
    if (e.getKeyChar()=='z') {
      snake.dirX=0;
      snake.dirY=1;
    }
  }

  public void keyPressed(KeyEvent e) {
  }

  /** Handle the key released event from the text field. */
  public void keyReleased(KeyEvent e) {
  }

  public void actionPerformed(ActionEvent e){
    if (e.getSource() == quit)
      System.exit(0);
  }
}