/*
 * Created on 15-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 com.aelitis.net.upnp.impl.services;

/**
 * @author parg
 *
 */

import java.net.*;
import java.util.*;

import org.gudy.azureus2.core3.util.UrlUtils;
import org.gudy.azureus2.plugins.utils.xml.simpleparser.SimpleXMLParserDocument;
import org.gudy.azureus2.plugins.utils.xml.simpleparser.SimpleXMLParserDocumentNode;

import com.aelitis.net.upnp.*;
import com.aelitis.net.upnp.impl.device.UPnPDeviceImpl;
import com.aelitis.net.upnp.services.UPnPSpecificService;

public class 
UPnPServiceImpl
	implements 	UPnPService
{
	private final UPnPDeviceImpl	device;
	
	private String			service_type;
	private String			local_desc_url;
	private String			local_control_url;
	
	private List			actions;
	private List			state_vars;
	
	private boolean			direct_invoke;
	
	private URL				preferred_control_url;
	
	public
	UPnPServiceImpl(
		UPnPDeviceImpl					_device,
		String							indent,
		SimpleXMLParserDocumentNode		service_node )
	{
		device		= _device;
		
		service_type 		= service_node.getChild("ServiceType").getValue().trim();
		
		local_desc_url		= service_node.getChild("SCPDURL").getValue();
		
		local_control_url	= service_node.getChild("controlURL").getValue();
		
		device.getUPnP().log( indent + service_type + ":desc=" + device.getAbsoluteURL(local_desc_url) + ", control=" + device.getAbsoluteURL(local_control_url));
	}
	
	public UPnPDevice
	getDevice()
	{
		return( device );
	}
	
	public String
	getServiceType()
	{
		return( service_type );
	}
	
	public boolean 
	isConnectable() 
	{
		try{
			List<URL> urls = getControlURLs();
			
			for ( URL url: urls ){
				
				Socket socket = new Socket();
				
				try{
					int	port = url.getPort();
					
					if ( port <= 0 ){
						
						port = url.getDefaultPort();
					}
					
					socket.connect( new InetSocketAddress( url.getHost(), port ), 5000 );
					
					if ( getPreferredControlURL() == null ){
					
						setPreferredControlURL( url );
					}
					
					return( true );
					
				}finally{
					
					try{
						socket.close();
						
					}catch( Throwable e ){
						
					}
				}
			}
		}catch( Throwable e ){
		}
				
		return( false );
	}
	
	public UPnPAction[]
	getActions()
	
		throws UPnPException
	{
		if ( actions == null ){
			
			loadDescription();
		}
		
		UPnPAction[]	res = new UPnPAction[actions.size()];
		
		actions.toArray( res );
		
		return( res );
	}
	
	public UPnPAction
	getAction(
		String	name )
	
		throws UPnPException
	{
		UPnPAction[]	my_actions = getActions();
		
		for (int i=0;i<my_actions.length;i++){
			
			if ( my_actions[i].getName().equalsIgnoreCase( name )){
				
				return( my_actions[i] );
			}
		}
		
		return( null );
	}
	
	public UPnPStateVariable[]
	getStateVariables()
	
		throws UPnPException
	{
		if ( state_vars == null ){
			
			loadDescription();
		}
		
		UPnPStateVariable[]	res = new UPnPStateVariable[state_vars.size()];
		
		state_vars.toArray( res );
		
		return( res );		
	}
	
	public UPnPStateVariable
	getStateVariable(
		String	name )
	
		throws UPnPException
	{
		UPnPStateVariable[]	vars = getStateVariables();
		
		for (int i=0;i<vars.length;i++){
			
			if ( vars[i].getName().equalsIgnoreCase( name )){
				
				return( vars[i] );
			}
		}
		
		return( null );
	}
		
	public URL
	getDescriptionURL()
	
		throws UPnPException
	{
		return( getURL( device.getAbsoluteURL( local_desc_url )));
	}
	
	public List<URL>
	getControlURLs()
	
		throws UPnPException
	{
		List<URL>	result = new ArrayList<URL>();

		String control_url = device.getAbsoluteURL( local_control_url );
		
		URL main_url =  getURL( control_url );
				
		result.add( main_url );
		
		List<URL>	alt_locs = device.getRootDevice().getAlternativeLocations();
		
		if ( alt_locs.size() > 0 ){
			
			for ( URL alt_loc: alt_locs ){
				
				URL alt_url = main_url;
				
				alt_url = UrlUtils.setHost( alt_url, alt_loc.getHost());
				alt_url = UrlUtils.setPort( alt_url, alt_loc.getPort());
				
				result.add( alt_url );
			}
		}
		
		if ( result.size() > 1 && preferred_control_url != null  ){
							
			if ( 	!result.get(0).equals( preferred_control_url ) &&
					result.contains( preferred_control_url )){
					
				result.remove( preferred_control_url );
				result.add( 0, preferred_control_url );
			}
		}
		
		return( result );
	}
	
	public void 
	setPreferredControlURL(
		URL url) 
	{
		preferred_control_url	= url;
	}
	
	protected URL 
	getPreferredControlURL()
	{
		return( preferred_control_url );
	}
	
	protected URL
	getURL(
		String	basis )
	
		throws UPnPException
	{
		try{
			URL	target;
			
			String	lc_basis = basis.toLowerCase();
			
			if ( lc_basis.startsWith( "http" ) || lc_basis.startsWith( "https" )){
				
					// absolute
				
				target = new URL( basis );
				
			}else{
				
					// relative
				
				URL	root_location = device.getRootDevice().getLocation();
				
				target = new URL( root_location.getProtocol() + "://" +
									root_location.getHost() + 
									(root_location.getPort() == -1?"":":" + root_location.getPort()) + 
									(basis.startsWith( "/" )?"":"/") + basis );
				
			}
			
			return( target );
			
		}catch( MalformedURLException e ){
			
			throw( new UPnPException( "Malformed URL", e ));
		}
	}
	
	protected void
	loadDescription()
	
		throws UPnPException
	{		
		SimpleXMLParserDocument	doc = device.getUPnP().downloadXML( device, getDescriptionURL());

		parseActions( doc.getChild( "ActionList" ));
				
		parseStateVars( doc.getChild( "ServiceStateTable"));
	}
	
	protected void
	parseActions(
		SimpleXMLParserDocumentNode	action_list )
	{
		actions	= new ArrayList();
		
		SimpleXMLParserDocumentNode[]	kids = action_list.getChildren();
		
		for (int i=0;i<kids.length;i++){
			
			actions.add( new UPnPActionImpl( this, kids[i] ));
		}
	}
	
	protected void
	parseStateVars(
		SimpleXMLParserDocumentNode	action_list )
	{
		state_vars	= new ArrayList();
		
		SimpleXMLParserDocumentNode[]	kids = action_list.getChildren();
		
		for (int i=0;i<kids.length;i++){
			
			state_vars.add( new UPnPStateVariableImpl( this, kids[i] ));
		}
	}

	public UPnPSpecificService
	getSpecificService()
	{
		if ( service_type.equalsIgnoreCase("urn:schemas-upnp-org:service:WANIPConnection:1")){
			
			return( new UPnPSSWANIPConnectionImpl( this ));
			
		}else if ( service_type.equalsIgnoreCase("urn:schemas-upnp-org:service:WANPPPConnection:1")){
			
			return( new UPnPSSWANPPPConnectionImpl( this ));
			
		}else if ( service_type.equalsIgnoreCase("urn:schemas-upnp-org:service:WANCommonInterfaceConfig:1")){
			
			return( new UPnPSSWANCommonInterfaceConfigImpl( this ));
			
		}else if ( service_type.equalsIgnoreCase("urn:schemas-upnp-org:service:VuzeOfflineDownloaderService:1")){
			
			return( new UPnPSSOfflineDownloaderImpl( this ));
			
		}else{
			
			return( null );
		}
	}
	
	public boolean
	getDirectInvocations()
	{
		return( direct_invoke );
	}
	
	public void
	setDirectInvocations(
		boolean	force )
	{
		direct_invoke	= force;
	}
}
