import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;
import java.net.*;
import java.io.*;

// imports for GUI
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;



public class AuctionServer extends JFrame implements ActionListener
{
 private DataControlImpl dc;
 private JButton saveButton;
 private JButton exitButton;

 public AuctionServer (DataControlImpl dcParm)
  {
   super ("Auction Server Interface");

   dc = dcParm;

   FlowLayout layout = new FlowLayout();

   // get content pane and set its layout
   Container container = getContentPane();
   container.setLayout( layout );  

   // set up the save button
   saveButton = new JButton ("Save Data to File");
   saveButton.addActionListener (this);
   container.add (saveButton);

   // set up the exit button
   exitButton = new JButton ("Shut Down Server");
   exitButton.addActionListener (this);
   container.add (exitButton);

   setSize( 700, 500 );
   setVisible( true );

  }

 // handle button events
 public void actionPerformed( ActionEvent event )
  {
   if (event.getSource() == saveButton)
      doSaveData ();

   else if (event.getSource() == exitButton)
      doShutDownServer();
  }

 public void doSaveData()
  {
   try
   {

   String s = (String)JOptionPane.showInputDialog(
                    this,
                    "Enter Filename to Save Bidder Data:\n",
                    "Save Bidder Data",
                    JOptionPane.PLAIN_MESSAGE,
                    null,
                    null,
                    "bidder.csv");

   if (s != null)
      dc.writeBidders(s);

   s = (String)JOptionPane.showInputDialog(
                    this,
                    "Enter Filename to Save Item Data:\n",
                    "Save Item Data",
                    JOptionPane.PLAIN_MESSAGE,
                    null,
                    null,
                    "item.csv");

   if (s != null)
      dc.writeItems(s);
   }
   catch (Exception e)
   {
    e.printStackTrace();
   } 
  }   

 public void doShutDownServer()
  {
   int n = JOptionPane.showConfirmDialog(this,
        "Would you like to save the data before shutting down the server?",
        "Shut Down Server",
        JOptionPane.YES_NO_OPTION);

   if (n == JOptionPane.YES_OPTION)
      doSaveData();

   n = JOptionPane.showConfirmDialog(this,
        "Would you really wish to shut down the server?",
        "Shut Down Server",
        JOptionPane.YES_NO_OPTION);

   if (n == JOptionPane.YES_OPTION)
      System.exit( 0 );
  }

 public static void main(String args[]) 
  {
   InputStreamReader is = 
      new InputStreamReader(System.in);
   BufferedReader br = new BufferedReader(is);
   String portNum, registryURL;

   try{     
      
      int RMIPortNum = 1099;
      startRegistry(RMIPortNum);

      // set up the database
      DataControlImpl dc = new DataControlImpl();
      dc.readBidders ("Bidders.csv");
      dc.readItems ("Items.csv");

      registryURL = 
        "rmi://localhost:" + RMIPortNum + "/AuctionServer";

      Naming.rebind(registryURL, dc);
      System.out.println("Auction Server ready.");

      AuctionServer application = new AuctionServer(dc);
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

    }// end try

    catch (Exception re) {
      System.out.println(
        "Exception in AuctionServer.main: " + re);
    } // end catch
  } // end main

  //This method starts a RMI registry on the local host, if
  //it does not already exists at the specified port number.
  private static void startRegistry(int RMIPortNum)
    throws RemoteException{
    try {
      Registry registry = 
        LocateRegistry.getRegistry(RMIPortNum);
      registry.list( );  
        // This call will throw an exception
        // if the registry does not already exist
    }
    catch (RemoteException e) { 
      // No valid registry at that port.
      Registry registry = 
        LocateRegistry.createRegistry(RMIPortNum);
    }
  } // end startRegistry

} // end class