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

public class selectServer extends JInternalFrame {

String selectedServer;
desktop d;
String dFileName="defaultServer.txt";

  public selectServer(desktop d) {
  super("Select Server", true, true, true, true);
  this.d = d;

  File dfile = new File(dFileName);
  if(dfile.exists()) {
    try {
      FileReader fr = new FileReader(dfile);
      BufferedReader in = new BufferedReader(fr);
      selectedServer = in.readLine();
      in.close();
    }
    catch (Exception e) {System.out.println(e);}
    d.setSelectedServer(selectedServer);
  }

  JPanel bck = new JPanel();
  getContentPane().add(bck);

  bck.setLayout(new BorderLayout());
  JPanel titlePanel = new JPanel();
  titlePanel.setLayout(new GridLayout(3,1));
  titlePanel.add(new JLabel(" "));
  titlePanel.add(new JLabel("Select Server", JLabel.CENTER));
  titlePanel.add(new JLabel(" "));
  bck.add(titlePanel,BorderLayout.NORTH);

  JPanel ss = new JPanel();
  ss.setLayout(new GridLayout(2,1));
  String[] servers = new String[5];
  servers[0] = "osprey4.npac.syr.edu";
  servers[1] = "heechee.osc.edu";
  servers[2] = "maine.npac.syr.edu";
  servers[3] = "titan.erc.msstate.edu";
  servers[4] = "test.server";
  JComboBox cb = new JComboBox(servers);
  cb.addItemListener(new ItemListener() {
    public void itemStateChanged(ItemEvent e) {
       setSelectedServer((String)e.getItem());
    }
  });
  setSelectedServer(servers[0]);
  ss.add(cb);

  JPanel bp = new JPanel();
  ActionListener al = new ActionListener() {
    public void actionPerformed(ActionEvent e){
       String what = e.getActionCommand();
       if(what.startsWith("Set as")) {
         setDefault();
       }
       if(what.equals("Done")) {
          dispose();
       } 
    }
  };

   JButton b1 = new JButton("Set as default");
   b1.addActionListener(al);
   bp.add(b1);
   JButton b2 = new JButton("Done");
   b2.addActionListener(al);
   bp.add(b2);
   ss.add(bp);

  bck.add(ss, BorderLayout.CENTER);  

  }


  public void setSelectedServer(String h) {
     selectedServer = h;
     d.setSelectedServer(h);
     System.out.println("setSelectedServer "+h);
  } 

  public void setDefault() {
     try {    
        FileWriter fw = new FileWriter(dFileName);
        fw.write(selectedServer); 
        fw.flush();
        fw.close();
     }
     catch (Exception e) { System.out.println(e);}
  }

}