/*-------------------------------------------------------------------------
|   rxtx is a native interface to serial ports in java.
|   Copyright 1997-2003 by Trent Jarvi taj@www.linux.org.uk.
|
|   This library is free software; you can redistribute it and/or
|   modify it under the terms of the GNU Lesser General Public
|   License as published by the Free Software Foundation; either
|   version 2.1 of the License, or (at your option) any later version.
|
|   This library is distributed in the hope that it will be useful,
|   but WITHOUT ANY WARRANTY; without even the implied warranty of
|   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
|   Lesser General Public License for more details.
|
|   The following has been added to allow RXTX to be distributed with Sun
|   Microsystem's CommAPI library as suggested by the FSF.
|
|   http://www.fsf.org/licenses/gpl-faq.html#LinkingOverControlledInterface
|
|   A program that contains no derivative of any portion of RXTX, but
|   is designed to work with RXTX by being compiled or linked with it,
|   is considered a "work that uses the Library" subject to the terms and
|   conditions of the GNU Lesser General Public License.
|
|   As a special exception, the copyright holders of RXTX give you
|   permission to link RXTX with independent modules that communicate with
|   RXTX solely through the Sun Microsytems CommAPI interface, regardless of
|   the license terms of these independent modules, and to copy and distribute
|   the resulting combined work under terms of your choice, provided that
|   every copy of the combined work is accompanied by a complete copy of
|   the source code of RXTX (the version of RXTX used to produce the
|   combined work), being distributed under the terms of the GNU Lesser General
|   Public License plus this exception.  An independent module is a
|   module which is not derived from or based on RXTX.
|
|   Note that people who make modified versions of RXTX are not obligated
|   to grant this special exception for their modified versions; it is
|   their choice whether to do so.  The GNU Lesser General Public License
|   gives permission to release a modified version without this exception; this
|   exception also makes it possible to release a modified version which
|   carries forward this exception.
|
|   You should have received a copy of the GNU Lesser General Public
|   License along with this library; if not, write to the Free
|   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
--------------------------------------------------------------------------*/
package gnu.io;

import java.io.RandomAccessFile;

public class Zystem
{
  public static final int SILENT_MODE = 0;
  public static final int FILE_MODE = 1;
  public static final int NET_MODE = 2;
  public static final int MEX_MODE = 3;
  public static final int PRINT_MODE = 4;
  public static final int J2EE_MSG_MODE = 5;
  public static final int J2SE_LOG_MODE = 6;

  static int mode;

  static
  {
    /* 
       The rxtxZystem library uses Python code and is not
       included with RXTX.  A seperate library will be released
       to avoid potential license conflicts.

       Trent Jarvi taj@www.linux.org.uk
     */

    //System.loadLibrary( "rxtxZystem" );
    mode = SILENT_MODE;
  }

  private static String target;

  public Zystem (int m) throws UnSupportedLoggerException
  {
    mode = m;
    startLogger ("asdf");
  }
    /**
     * Constructor.
     * Mode is taken from the java system property "gnu.io.log.mode". The available values are :<ul>
     * <li> SILENT_MODE No logging
     * <li> FILE_MODE log to file
     * <li> NET_MODE
     * <li> MEX_MODE
     * <li> PRINT_MODE
     * <li> J2EE_MSG_MODE
     * <li> J2SE_LOG_MODE log to java.util.logging
     * </ul>
     */
  public Zystem () throws UnSupportedLoggerException
  {
    String s = System.getProperty ("gnu.io.log.mode");
    if (s != null)
      {
	if ("SILENT_MODE".equals (s))
	  {
	    mode = SILENT_MODE;
	  }
	else if ("FILE_MODE".equals (s))
	  {
	    mode = FILE_MODE;
	  }
	else if ("NET_MODE".equals (s))
	  {
	    mode = NET_MODE;
	  }
	else if ("MEX_MODE".equals (s))
	  {
	    mode = MEX_MODE;
	  }
	else if ("PRINT_MODE".equals (s))
	  {
	    mode = PRINT_MODE;
	  }
	else if ("J2EE_MSG_MODE".equals (s))
	  {
	    mode = J2EE_MSG_MODE;
	  }
	else if ("J2SE_LOG_MODE".equals (s))
	  {
	    mode = J2SE_LOG_MODE;
	  }
	else
	  {
	    try
	    {
	      mode = Integer.parseInt (s);
	    }
	    catch (NumberFormatException e)
	    {
	      mode = SILENT_MODE;
	    }
	  }
      }
    else
      {
	mode = SILENT_MODE;
      }
    startLogger ("asdf");
  }

  public void startLogger () throws UnSupportedLoggerException
  {
    if (mode == SILENT_MODE || mode == PRINT_MODE)
      {
	//nativeNetInit( );
	return;
      }
    throw new UnSupportedLoggerException ("Target Not Allowed");
  }

  /*  accept the host or file to log to. */

  public void startLogger (String t) throws UnSupportedLoggerException
  {
    target = t;
    /*
       if ( mode == NET_MODE )
       {
       nativeNetInit( );
       }
       if ( nativeInit( ) )
       {
       throw new UnSupportedLoggerException(
       "Port initializion failed" );
       }
     */
    return;
  }

  public void finalize ()
  {
    /*
       if ( mode == NET_MODE )
       {
       nativeNetFinalize( );
       }
       nativeFinalize();
     */
    mode = SILENT_MODE;
    target = null;
  }

  public void filewrite (String s)
  {
    try
    {
      RandomAccessFile w = new RandomAccessFile (target, "rw");;
      w.seek (w.length ());
      w.writeBytes (s);
      w.close ();
    } catch (Exception e)
    {
      System.out.println ("Debug output file write failed");
    }
  }

  public boolean report (String s)
  {
    if (mode == NET_MODE)
      {
	//      return( nativeNetReportln( s ) );
      }
    else if (mode == PRINT_MODE)
      {
	System.out.println (s);
	return (true);
      }
    else if (mode == MEX_MODE)
      {
	//      return( nativeMexReport( s ) );
      }
    else if (mode == SILENT_MODE)
      {
	return (true);
      }
    else if (mode == FILE_MODE)
      {
	filewrite (s);
      }
    else if (mode == J2EE_MSG_MODE)
      {
	return (false);
      }
    else if (mode == J2SE_LOG_MODE)
      {
	java.util.logging.Logger.getLogger ("gnu.io").fine (s);
	return (true);
      }
    return (false);
  }

  public boolean reportln ()
  {
    boolean b;
    if (mode == NET_MODE)
      {
	//      b= nativeNetReportln( "\n" );
	//      return(b);
      }
    else if (mode == PRINT_MODE)
      {
	System.out.println ();
	return (true);
      }
    else if (mode == MEX_MODE)
      {
	//      b = nativeMexReportln( "\n" );
	//      return(b);
      }
    else if (mode == SILENT_MODE)
      {
	return (true);
      }
    else if (mode == FILE_MODE)
      {
	filewrite ("\n");
      }
    else if (mode == J2EE_MSG_MODE)
      {
	return (false);
      }
    return (false);
  }

  public boolean reportln (String s)
  {
    boolean b;
    if (mode == NET_MODE)
      {
	//      b= nativeNetReportln( s + "\n" );
	//      return(b);
      }
    else if (mode == PRINT_MODE)
      {
	System.out.println (s);
	return (true);
      }
    else if (mode == MEX_MODE)
      {
	//      b = nativeMexReportln( s + "\n" );
	//      return(b);
      }
    else if (mode == SILENT_MODE)
      {
	return (true);
      }
    else if (mode == FILE_MODE)
      {
	filewrite (s + "\n");
      }
    else if (mode == J2EE_MSG_MODE)
      {
	return (false);
      }
    else if (mode == J2SE_LOG_MODE)
      {
	return (true);
      }
    return (false);
  }

/*
	private native boolean nativeInit( );
	private native void nativeFinalize();
*/

  /* open and close the socket */
/*
	private native boolean nativeNetInit( );
	private native void nativeNetFinalize();
*/

  /* dumping to a remote machine */
/*
	public native boolean nativeNetReport( String s );
	public native boolean nativeNetReportln( String s );
*/

  /*  specific to Matlab */
/*
	public native boolean nativeMexReport( String s );
	public native boolean nativeMexReportln( String s );
*/
}