import heartMonitor.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;

// This class implements a simulated heart patient in the hospital
//
// Written by: Stuart Hansen
// Date: February 2, 2009
public class HeartPatient extends JFrame {

    private HeartRateMonitor station;  // the remote nurses station

    // The GUI Components
    private JSlider rateSlider;

    private String name;  // the patient's name
    private boolean alarmSounding;  // a flag stating whether the alarm is set

    // The constructor sets up the ORB and the GUI
    public HeartPatient(String [] args)
    {
        this.name = args[0];
        this.alarmSounding = false;
        
	setUpORB(args);
        station.register(name);
        setUpGUI(name);
    }

    // When a patient is removed from their monitor, the nurses'
    // station is notified
    protected void finalize () throws Throwable
    {
        System.out.println("Finalizing " + name);
        super.finalize();
        station.unregister(name);
    }

    // This method sets up all the GUI components
    public void setUpGUI (String name)
    {
        // Get the content pane of the application
        Container c = getContentPane();

        // Set up the patient's slider
        rateSlider = new JSlider (0, 255, 80);
        rateSlider.setLabelTable(rateSlider.createStandardLabels(50));
        rateSlider.setPaintLabels(true);
        rateSlider.setPaintTicks(true);
        rateSlider.addChangeListener(new RateHandler());
        c.add(rateSlider);
        
        // Set a couple of properties and open the window
        setTitle("Heart Patient - " + name);
        setSize (300, 75);
        setLocation(50, 50);

        // Note that we want to use custom code here to make certain
        // that the Nursing station is notified of the window closing.
        //setDefaultCloseOperation(EXIT_ON_CLOSE);
        addWindowListener(new WindowClosingHandler());
        
        setVisible(true);
    }

    // An inner class to handle heart rate changes
    public class RateHandler implements ChangeListener
    {
        public void stateChanged (ChangeEvent e)
        {
            int rate = rateSlider.getValue();

            // Sound the alarm if the patient's value go out of range
            if (!alarmSounding && (rate <=40 || rate >= 140))
            {
                alarmSounding = true;
                station.soundAlarm(name, rate);
            }
            // Turn the local alarm off if patient recovers.
            else if (alarmSounding && rate > 40 && rate < 140)
                alarmSounding = false;
            
            station.newRate(name, rate);
	}
    }

    // Special Class to make certain the nursing station is notified if
    // the patient window is closed
    public class WindowClosingHandler extends WindowAdapter
    {
        public void windowClosing(WindowEvent e)
        {
            station.unregister(name);
        }
       
    }


    // This method sets up the data communication with the nursing station
    public void setUpORB(String [] args)
    {
        try {
            // Create and initialize the ORB
            ORB orb = ORB.init(args, null);

            // Get a reference to the name service
            org.omg.CORBA.Object nameServiceObj = 
                orb.resolve_initial_references("NameService");

            // Narrow (cast) the object reference to a name service reference 
            NamingContextExt nameService = 
                NamingContextExtHelper.narrow(nameServiceObj);
 
            // Get a reference to the calculator from the name service
            org.omg.CORBA.Object calcObj = 
                    nameService.resolve_str("NursesStation");

            // Narrow (cast) the object reference to a calculator reference
            station = HeartRateMonitorHelper.narrow(calcObj);

        } catch (Exception e) {
            System.out.println("ERROR : " + e) ;
            e.printStackTrace(System.out);
        }
    }
      
    // The main simply makes a new calculator client
    public static void main(String args[]) {
        new HeartPatient (args);
    }
}