/*
   * The contents of this file are subject to the BT "ZEUS" Open Source 
   * Licence (L77741), Version 1.0 (the "Licence"); you may not use this file 
   * except in compliance with the Licence. You may obtain a copy of the Licence
   * from $ZEUS_INSTALL/licence.html or alternatively from
   * http://www.labs.bt.com/projects/agents/zeus/licence.htm
   * 
   * Except as stated in Clause 7 of the Licence, software distributed under the
   * Licence is distributed WITHOUT WARRANTY OF ANY KIND, either express or 
  * implied. See the Licence for the specific language governing rights and 
  * limitations under the Licence.
  * 
  * The Original Code is within the package zeus.*.
  * The Initial Developer of the Original Code is British Telecommunications
  * public limited company, whose registered office is at 81 Newgate Street, 
  * London, EC1A 7AJ, England. Portions created by British Telecommunications 
  * public limited company are Copyright 1996-9. All Rights Reserved.
  * 
  * THIS NOTICE MUST BE INCLUDED ON ANY COPY OF THIS FILE
  */
  
  
  
  /*********************************************************************
   *  Visualiser.java - this creates and launches the Visualiser Hub  *
   ********************************************************************/
  
  package zeus.visualiser;
  
  import java.util.*;
  import java.io.*;
  
  import zeus.util.*;
  import zeus.concepts.*;
  import zeus.actors.*;
  import zeus.agents.*;
  
  
  public class Visualiser extends BasicAgent {
    public Visualiser(String name, String filename, Vector nameservers,
                      boolean quickflag) {
      super(SystemProps.getProperty("agent.names.visualiser"),
            name, nameservers);
  
      context.set(new OntologyDb(context.GenSym()));
      context.MailBox().lowerStatus();
      context.MsgHandler().lowerStatus();
  
      if ( filename != null ) {
         OntologyDb db = context.OntologyDb();
         int status = db.openFile(new File(filename));
         if ( (status & OntologyDb.ERROR_MASK) != 0 ) {
            System.err.println("Ontology File I/O Error: " + db.getError());
            System.exit(0);
         }
         else if ( (status & OntologyDb.WARNING_MASK) != 0 )
           System.err.println("Warning: " + db.getWarning());
      }
      new VisualiserHub(context,quickflag);
    }
  
    protected static void version() {
      System.err.println("Visualiser version: " +
                         SystemProps.getProperty("version.id"));
      System.exit(0);
    }
  
    protected static void usage() {
      System.err.println("Usage: java Visualiser <name> -s <dns_file> " +
                         "[-o ontology_file] [-gui ViewerProg] " +
           "[-e ExternalProg] [-quick] [-debug] [-h] [-v]");
      System.exit(0);
    }
  
    public static void main(String[] arg){
          // debug classpath problems for lamers. 
      // added by simon 21/08/00
      try {
           Class c = Class.forName("java.lang.Object"); 
      }
      catch (ClassNotFoundException cnfe) { 
         System.out.println("Java cannot find java.lang.Object.\n This indicates that the rt.jar file is not in your classpath.\n Ensure that $java_install_dir//jre//rt.jar is present in the classpath and then continue");
              cnfe.printStackTrace();}
      try {
          // obscure zeus class picked to try it 
           Class c = Class.forName("zeus.gui.help.HelpWindow"); 
      }
      catch (ClassNotFoundException cnfe) { 
         System.out.println("Java cannot find a zeus class.\n This indicates that the zeus.jar file is not in your classpath.\n Ensure that zeus_install_dir//lib//zeus.jar is present in the classpath and then continue");
              cnfe.printStackTrace();}   
   /*   try {
           Class c = Class.forName("gnu.regexp.REException"); 
      }
      catch (ClassNotFoundException cnfe) { 
         System.out.println("Java cannot find a utility object.\n This indicates that the gnu-regexp.jar file is not in your classpath.\n Ensure that $zeus_install_dir//lib//gnu-regexp.jar is present in the classpath and then continue");
              cnfe.printStackTrace();}*/
              
      Vector nameservers = null;
      String dns_file = null;
     String ontology_file = null;
     String gui = null;
     boolean quick = false;
     String external = null;
 
     if ( arg.length < 3 )  usage();
     else
       for( int i = 1; i < arg.length; i++ ) {
         if ( arg[i].equals("-s") && ++i < arg.length )
            dns_file = arg[i];
         else if ( arg[i].equals("-o") && ++i < arg.length )
            ontology_file = arg[i];
         else if ( arg[i].equals("-e") && ++i < arg.length )
            external = arg[i];
         else if ( arg[i].equals("-gui") && ++i < arg.length )
            gui = arg[i];
         else if ( arg[i].equals("-quick") )
            quick = true;
         else if ( arg[i].equals("-debug") ) {
 	  Core.debug = true;
           Core.setDebuggerOutputFile(arg[0] + ".log");
         }
         else if ( arg[i].equals("-h") )
            usage();
         else if ( arg[i].equals("-v") )
            version();
         else
            usage();
       }
 
     try {
        nameservers = ZeusParser.addressList(new FileInputStream(dns_file));
        if ( nameservers == null || nameservers.isEmpty() )
           throw new IOException();
 
       Visualiser f = new Visualiser(arg[0],ontology_file,nameservers,quick);
 
       Class c;
       if ( gui != null ) {
          c = Class.forName(gui);
          BasicAgentUI ui = (BasicAgentUI) c.newInstance();
          ui.set(f.getAgentContext());
       }
 
       if ( external != null ) {
          c = Class.forName(external);
          ZeusExternal user_prog = (ZeusExternal)c.newInstance();
          user_prog.exec(f.getAgentContext());
       }
 
     }
     catch(Exception e) {
       e.printStackTrace();
       System.exit(0);
     }
   }
 }