/*
 * Created on 10-Jun-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.ui.config;


/**
 * @author parg
 *
 */
import java.security.MessageDigest;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.SHA1Hasher;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.plugins.ui.config.PasswordParameter;
import org.gudy.azureus2.pluginsimpl.local.PluginConfigImpl;

public class 
PasswordParameterImpl 
	extends 	ParameterImpl 
	implements 	PasswordParameter
{
	protected  	byte[] 	defaultValue;
	protected 	int		encoding_type;
	
	public 
	PasswordParameterImpl(
		PluginConfigImpl 	config,
		String 				key, 
		String 				label,
		int					_encoding_type,
		byte[] 				_default_value)
	{ 
		super(config,key, label);
		
		encoding_type	= _encoding_type;
		
		if ( _default_value == null ){
			
			defaultValue = new byte[0];
			
		}else{
			
			defaultValue = encode( _default_value );
		}
	
		config.notifyParamExists(getKey());
		
		COConfigurationManager.setByteDefault( getKey(), defaultValue );
	}
	
	public byte[] getDefaultValue()
	{
		return( defaultValue );
	}
	
	public void
	setValue(
		String	plain_password )
	{
		byte[] encoded;
		
		if ( plain_password == null || plain_password.length() == 0){
		
			encoded = new byte[0];
			
		}else{
			
			encoded = encode( plain_password );
		}
		
		config.setUnsafeByteParameter( getKey(), encoded );
	}
	
	public int
	getEncodingType()
	{
		return( encoding_type );
	}
	
	public byte[]
	getValue()
	{
		return config.getUnsafeByteParameter(getKey(), getDefaultValue());
	}
	
	protected byte[]
   	encode(
   		String		str )
   	{
		// bit of a mess here as all other than md5 use default char set whereas md5 uses utf-8
		
		try{
		
			return( encode( encoding_type == ET_MD5?str.getBytes( "UTF-8" ):str.getBytes()));
			
		}catch( Throwable e ){
			
			Debug.out( e );
			
			return( null );
		}
   	}
	
	protected byte[]
	encode(
		byte[]		bytes )
	{
		if ( encoding_type == ET_SHA1 ){
			
	        SHA1Hasher hasher = new SHA1Hasher();
	        
	        return( hasher.calculateHash( bytes ));
	        
		}else if ( encoding_type == ET_MD5 ){
			
			try{
				return( MessageDigest.getInstance( "md5" ).digest( bytes ));
				
			}catch( Throwable e ){
				
				Debug.printStackTrace(e);
			}
		}
		
		return( bytes );
	}
}
