import com.sun.kjava.*;
import javax.microedition.io.*;
import java.io.*;

/** Simple socket connection example.  This Spotlet connects to
 * webdev.apl.jhu.edu and sends a hello.  It then displays the response from
 * the server on the screen.
 * @author Robert Evans, rbevans@akane.jhuapl.edu
 */

public class SockTest extends Spotlet
{
    // the graphics context
    Graphics g = Graphics.getGraphics();
    // our exit buttons
    static Button exitButton;
    // the streams we will be using
    InputStream is;
    OutputStream os;
    StreamConnection socket = null;
    // A single stringbuffer to collect the message from the server
    StringBuffer stringFromWebdev = new StringBuffer(400);
    // a scrolling text box to handle output
    BasicScrollTextBox scrollText = new BasicScrollTextBox();

    /** Main method */
    public static void main(String[] args)
    {
	(new SockTest()).register(NO_EVENT_OPTIONS);
    }

    /** SockTest object.  Creates a scrolling text box and exit button on
     * the screen.  Queries a server program on webdev.apl.jhu.edu on port
     * 1501 and then prints the response
     */
    public SockTest()
    {
	// draw our gui components
  	scrollText = new BasicScrollTextBox("",
				       5, 25, 150, 115);
	exitButton = new Button("Exit",139,145);
	g.clearScreen();
	exitButton.paint();
	g.drawString(" Test connection to webdev.apl.jhu.edu ",
		     0, 0, Graphics.INVERT);

	// make the connections
	try {
	    // first get the socket
	    socket =
  		 (StreamConnection)Connector.open("socket://128.220.101.101:1501",
						 Connector.READ_WRITE,
						 true);
	    if (socket == null) {
  		scrollText.addText("Couldn't open socket to 128.220.101.101:1501...\n\n");
	    } else {
		scrollText.addText("Connection is established to webdev on port 1501...\n\n");
	    }
	    // update the display
	    scrollText.paint();

	    // get the input and output streams
	    is = socket.openInputStream();
	    scrollText.paint();
	    os = socket.openOutputStream();
	    scrollText.paint();

	    // send the hello message
	    if (getFlashID() == null) {
		os.write(("Hello from somebody's POSE").getBytes());
	    } else {
		os.write(("Hello from Palm " + getFlashID()).getBytes());
	    }

	    // and read the response from the server
	    int b;
	    while ( (b=is.read()) != -1) {
		stringFromWebdev.append((char)b);
	    }
	    stringFromWebdev.append('\n');
	    stringFromWebdev.append('\n');

	    // print the response to the screen
	    scrollText.addText(stringFromWebdev.toString());
	    scrollText.paint();

	    // and close the connection
	    scrollText.addText("Closing connection...");
	    socket.close();
	    scrollText.paint();
	}
	
	catch (Exception e) {
		scrollText.addText( "Unable to open connection...");
		scrollText.paint();
	}
    }

    /** Handle pen down event on exit button */
    public void penDown(int x, int y)
    {
	if (exitButton.pressed(x,y))
	    System.exit(0);
    }
}