/*
 * File    : ConfigurationChecker.java
 * Created : 8 oct. 2003 23:04:14
 * By      : Olivier 
 * 
 * Azureus - a Java Bittorrent client
 *
 * 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.
 *
 * 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 ( see the LICENSE file ).
 *
 * 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.core3.config.impl;


import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.io.*;
import java.lang.reflect.Field;
import java.net.InetAddress;

import org.gudy.azureus2.core3.config.*;
import org.gudy.azureus2.core3.security.*;
import org.gudy.azureus2.core3.util.*;
import org.gudy.azureus2.core3.logging.*;

import com.aelitis.azureus.core.proxy.socks.AESocksProxy;
import com.aelitis.azureus.core.proxy.socks.AESocksProxyFactory;
import com.aelitis.azureus.core.speedmanager.impl.SpeedManagerImpl;
import com.aelitis.azureus.core.util.FeatureAvailability;



/**
 * 
 * The purpose of this class is to provide a way of checking that the config file
 * contains valid values when azureus is started.
 * 
 * 
 * @author Olivier
 * 
 */
public class 
ConfigurationChecker 
{
	private static final LogIDs LOGID = LogIDs.CORE;
	 
  private static boolean system_properties_set	= false;
  
  private static boolean checked 				= false;
  private static boolean new_install			= false;
  
  private static AEMonitor	class_mon	= new AEMonitor( "ConfigChecker");

	private static boolean new_version = false;
  
  

  
  protected static void
  setSystemProperties()
  {
  	try{
  		class_mon.enter();
  	
	  	if ( system_properties_set ){
	  		
	  		return;
	  	}
	  	
	  	COConfigurationManager.preInitialise();
      
	  		//
	  	
	  	String	app_path 	=  SystemProperties.getApplicationPath();
	  	String	user_path 	=  SystemProperties.getUserPath();
	  	
	  	loadProperties( app_path );
	  	
	  	if ( !app_path.equals( user_path )){
	  		
	  		loadProperties( user_path );
	  	}
	  	
	  		// kinda hard to do this system property setting early enough as we musn't load the 
	  		// config until after checking the "pass to existing process" code and this loads the
	  		// class InetAddress that caches the current system prop
	  	
	  	COConfigurationManager.addAndFireParameterListener(
	  		"IPV6 Prefer Addresses",
	  		new ParameterListener()
	  		{
	  			private boolean done_something = false;
	  			
	  			public void 
	  			parameterChanged(
	  				String name )
	  			{
	  			  	boolean	prefer_ipv6 	= COConfigurationManager.getBooleanParameter( name );
	  		  		
	  			  	boolean existing = !System.getProperty( "java.net.preferIPv6Addresses", "false" ).equalsIgnoreCase( "false" );
	  			  	
	  			  		// if user has overridden with a -D at az start then we don't want to let our config
	  			  		// setting (which currently defaults to FALSE) to set this back
	  			  	
	  			  	if ( existing && !done_something ){
	  			  		
	  			  		return;
	  			  	}
	  			  	
	  			  	if ( existing != prefer_ipv6 ){
	  			  		
	  			  		done_something = true;
	  			  	
		  		  		System.setProperty( "java.net.preferIPv6Addresses", prefer_ipv6?"true":"false" );
		  		  		
		  		  		try{
		  		  			Field field = InetAddress.class.getDeclaredField( "preferIPv6Address" );
		  		  			
		  		  			field.setAccessible( true );
		  		  			
		  		  			field.setBoolean( null, prefer_ipv6 );
		  		  			
		  		  		}catch( Throwable e ){
		  		  			
		  		  			Debug.out( "Failed to update 'preferIPv6Address'", e );
		  		  		}
	  			  	}
	  			}
	  		});
	  	
      // socket connect/read timeouts
	  	
	  	int	connect_timeout = COConfigurationManager.getIntParameter( "Tracker Client Connect Timeout");
	  	int	read_timeout 	= COConfigurationManager.getIntParameter( "Tracker Client Read Timeout");
	  	
	  	if (Logger.isEnabled())
				Logger.log(new LogEvent(LOGID, "TrackerClient: connect timeout = "
						+ connect_timeout + ", read timeout = " + read_timeout));
	  	
	  	System.setProperty(
	  			"sun.net.client.defaultConnectTimeout", 
				String.valueOf( connect_timeout*1000 ));
	  			
	  	System.setProperty(
	  			"sun.net.client.defaultReadTimeout", 
	  			String.valueOf( read_timeout*1000 ));
	    
	    // proxy
	  	
	  	boolean TEST_PROXY = false;
	  	
	  	if ( TEST_PROXY ){
	  		
	  			// test our proxy
	    	try{
	    		AESocksProxy	proxy = 
	    			AESocksProxyFactory.create( 16234, 0, 0 );
	    		
		        System.setProperty("socksProxyHost", "127.0.0.1");
		        System.setProperty("socksProxyPort", "" + proxy.getPort());

	    		
	    	}catch( Throwable e ){
	    		
	    		Debug.printStackTrace(e);
	    	}
	  	}else{
	  		
		    if ( COConfigurationManager.getBooleanParameter("Enable.Proxy") ) {
		      String host = COConfigurationManager.getStringParameter("Proxy.Host");
		      String port = COConfigurationManager.getStringParameter("Proxy.Port");
		      String user = COConfigurationManager.getStringParameter("Proxy.Username");
		      String pass = COConfigurationManager.getStringParameter("Proxy.Password");
			     
		      if ( user.trim().equalsIgnoreCase("<none>")){
		    	  user = "";
		      }
		      
		      if ( COConfigurationManager.getBooleanParameter("Enable.SOCKS") ) {
		        System.setProperty("socksProxyHost", host);
		        System.setProperty("socksProxyPort", port);
		        
		        if (user.length() > 0) {
		          System.setProperty("java.net.socks.username", user);
		          System.setProperty("java.net.socks.password", pass);
		        }
		      }
		      else {
		        System.setProperty("http.proxyHost", host);
		        System.setProperty("http.proxyPort", port);
		        System.setProperty("https.proxyHost", host);
		        System.setProperty("https.proxyPort", port);
		        
		        if (user.length() > 0) {
		          System.setProperty("http.proxyUser", user);
		          System.setProperty("http.proxyPassword", pass);
		        }
		      }
		    }
	    }
	  
	  	SESecurityManager.initialise();
  	}finally{
  		
  		class_mon.exit();
  	}
  }
  
  protected static void
  loadProperties(
	  String	dir )
  {
	  try{
		  File	prop_file = new File( dir, "azureus.properties" );

		  if ( prop_file.exists()){

			  Logger.log(new LogEvent(LOGID, "Loading properties file from " + prop_file.getAbsolutePath()));
			  
			  Properties props = new Properties();

			  InputStream is = new FileInputStream( prop_file );

			  try{
				  props.load( is );

				  Iterator it = props.entrySet().iterator();

				  while( it.hasNext()){

					  Map.Entry entry = (Map.Entry)it.next();

					  String	key 	= (String)entry.getKey();
					  String	value 	= (String)entry.getValue();
					  
					  Logger.log(new LogEvent(LOGID, "    " + key + "=" + value ));
					  
					  System.setProperty( key, value );
				  }
			  }finally{

				  is.close();
			  }
		  }
	  }catch( Throwable e ){

	  }
  }
  
  public static void 
  checkConfiguration() 
  { 
  	try{
  		class_mon.enter();

	    if(checked)
	      return;
	    checked = true;
	    
	    boolean	changed	= false;
	    
	    String	last_version = COConfigurationManager.getStringParameter( "azureus.version", "" );
	    
	    String	this_version	= Constants.AZUREUS_VERSION;
	    
	    if ( !last_version.equals( this_version )){
	    	if (!Constants.getBaseVersion(last_version).equals(
						Constants.getBaseVersion())) {
	    		COConfigurationManager.setParameter("Last Version", last_version);
					new_version = true;
				}
	    	
	    	if (!COConfigurationManager.hasParameter("First Recorded Version", true)) {
					COConfigurationManager.setParameter("First Recorded Version",
							last_version.length() == 0 ? this_version : last_version);
				} else {
					String sFirstVersion = COConfigurationManager.getStringParameter("First Recorded Version");
					String sMinVersion = Constants.compareVersions(sFirstVersion,
							this_version) > 0 ? this_version : sFirstVersion;
					if (last_version.length() > 0) {
						sMinVersion = Constants.compareVersions(sMinVersion, last_version) > 0
								? last_version : sMinVersion;
					}
					COConfigurationManager.setParameter("First Recorded Version",
							sMinVersion);
				}
	    
	    	COConfigurationManager.setParameter( "azureus.version", this_version );
	    	
	    	changed	= true;
	    }
	    
	    	// migration from default-save-dir enable = true to false
	    	// if the user hadn't explicitly set a value then we want to stick with true
	    
	    if ( last_version.length() == 0 ){  //this is a virgin installation, i.e. first time running, called only once ever
	    	
	    	new_install	= true;
	    	
	    		// "last version" introduced at same time as the default save dir problem
	    		// which was the release after 2.2.0.0
	    	
	    		// only do this on an already existing configuration. Easiest way to test
	    		// for this is the "diagnostics.tidy_close" flag
	    	
	    	if ( 	COConfigurationManager.doesParameterNonDefaultExist( "diagnostics.tidy_close" )){
	    		
	    		if ( !COConfigurationManager.doesParameterNonDefaultExist( "Use default data dir" )){
	    		
	    			COConfigurationManager.setParameter( "Use default data dir", true );
	    		
	    			changed	= true;
	    		}
	    		
	    		if ( !COConfigurationManager.doesParameterNonDefaultExist( "Tracker Port Enable" )){
		    		
		    		COConfigurationManager.setParameter( "Tracker Port Enable", true );
		    	
		    		changed	= true;
	    		}
	    	}
	    		    	
	    	//enable Beginner user mode for first time
	    	if( !COConfigurationManager.doesParameterNonDefaultExist( "User Mode" ) ) {
	    		COConfigurationManager.setParameter( "User Mode", 0 );
	    		changed	= true;	    		
	    	}
	    	 	
	    	//make sure we set and save a random listen port
	    	if( !COConfigurationManager.doesParameterNonDefaultExist( "TCP.Listen.Port" ) ) {
	    		int	rand_port = RandomUtils.generateRandomNetworkListenPort();
	    		COConfigurationManager.setParameter( "TCP.Listen.Port", rand_port );
	    		COConfigurationManager.setParameter( "UDP.Listen.Port", rand_port );
	    		COConfigurationManager.setParameter( "UDP.NonData.Listen.Port", rand_port );
	    		changed = true;
	    		
	    	}
	    }else {  //this is a pre-existing installation, called every time after first
	    	
	    	
	    	
	    	if // disable safe selector mode enabled at some point in the past if we're on java 6 or higher and/or not on windows
	    	(	COConfigurationManager.getBooleanParameter("network.tcp.enable_safe_selector_mode")
	    		&& !(Constants.isWindows &&
	    			(Constants.JAVA_VERSION.startsWith("1.4") ||
	    			Constants.JAVA_VERSION.startsWith("1.5"))
	    		)
	    	)
	    	{
	    		COConfigurationManager.removeParameter("network.tcp.enable_safe_selector_mode");
	    		changed = true;
	    	}

	    	// transition from tracker-only port override to global port override
	    	if(COConfigurationManager.doesParameterNonDefaultExist("TCP.Announce.Port"))
	    	{
		    	COConfigurationManager.setParameter("TCP.Listen.Port.Override", COConfigurationManager.getStringParameter("TCP.Announce.Port", ""));
		    	COConfigurationManager.removeParameter("TCP.Announce.Port");
		    	changed = true;
	    	}
	    	

	    	
	    	
	   	 //enable Advanced user mode for existing users by default, to ease 2304-->2306 migrations
	   	 if( !COConfigurationManager.doesParameterNonDefaultExist( "User Mode" ) ) {
	   		 COConfigurationManager.setParameter( "User Mode", 2 );
	   		 changed	= true;
	   	 }
	    }
	    
	    	// initial UDP port is same as TCP
	    
	    if( !COConfigurationManager.doesParameterNonDefaultExist( "UDP.Listen.Port" ) ){
	    	COConfigurationManager.setParameter( "UDP.Listen.Port", COConfigurationManager.getIntParameter( "TCP.Listen.Port" ));
	    	
	    	changed = true;
	    }
	    
	    	// remove separate DHT udp port config and migrate to main UDP port above
	    
	    if ( !COConfigurationManager.getBooleanParameter( "Plugin.DHT.dht.portdefault", true )){
	    	
	    	COConfigurationManager.removeParameter( "Plugin.DHT.dht.portdefault" );
	    	
	    	int	tcp_port	= COConfigurationManager.getIntParameter( "TCP.Listen.Port" );
	    	int	udp_port	= COConfigurationManager.getIntParameter( "UDP.Listen.Port" );
	    	
	    	int	dht_port = COConfigurationManager.getIntParameter( "Plugin.DHT.dht.port", udp_port );
	    	
	    	if ( dht_port != udp_port ){
	    		
	    			// if tcp + udp are currently different then we leave them as is and migrate
	    			// dht to the udp one. Otherwise we change the core udp to be that of the dht
	    		
	    		if ( tcp_port == udp_port ){
	    			
	    			COConfigurationManager.setParameter( "UDP.Listen.Port", dht_port );
	    		}
	    	}
	    	
	    	changed	= true;
	    }
	    
	    	// reintroduce separate non-data UDP port yto separtate data from dht/UDP tracker
	    
	    if( !COConfigurationManager.doesParameterNonDefaultExist( "UDP.NonData.Listen.Port" ) ){
	    	COConfigurationManager.setParameter( "UDP.NonData.Listen.Port", COConfigurationManager.getIntParameter( "UDP.Listen.Port" ));
	    	
	    	changed = true;
	    }
	    
	    	// fix up broken config when multi-udp not enabled but values differ
	    
	    if ( !COConfigurationManager.ENABLE_MULTIPLE_UDP_PORTS ){
	    	
	    	int	udp1 = COConfigurationManager.getIntParameter( "UDP.Listen.Port" );
	    	int	udp2 = COConfigurationManager.getIntParameter( "UDP.NonData.Listen.Port" );
	    	
	    	if ( udp1 != udp2 ){
	    		
		    	COConfigurationManager.setParameter( "UDP.NonData.Listen.Port", udp1 );
		    	
		    	changed = true;
	    	}
	    }
	    
	    int	tcp_port = COConfigurationManager.getIntParameter( "TCP.Listen.Port" );
	    
	    	// reset invalid ports - single-instance socket port and (small) magnet uri listener port range
	    
	    if ( tcp_port == 6880 || ( tcp_port >= 45100 && tcp_port <= 45103 )){
	    
	    	int	new_tcp_port	=  RandomUtils.generateRandomNetworkListenPort();
	    	
	    	COConfigurationManager.setParameter( "TCP.Listen.Port", new_tcp_port );
	    	
	    	if ( COConfigurationManager.getIntParameter( "UDP.Listen.Port" ) == tcp_port ){
	    		
	    		COConfigurationManager.setParameter( "UDP.Listen.Port", new_tcp_port );
	    	}
	    	
	    	if ( COConfigurationManager.getIntParameter( "UDP.NonData.Listen.Port" ) == tcp_port ){
	    		
	    		COConfigurationManager.setParameter( "UDP.NonData.Listen.Port", new_tcp_port );
	    	}
	    	
	    	changed = true;
	    }
	    
	    // migrate to split tracker client/server key config
	    
	    if ( !COConfigurationManager.doesParameterDefaultExist( "Tracker Key Enable Client")){
	    	
	    	boolean	old_value = COConfigurationManager.getBooleanParameter("Tracker Key Enable");
	    	
	    	COConfigurationManager.setParameter("Tracker Key Enable Client", old_value);
	    	
	    	COConfigurationManager.setParameter("Tracker Key Enable Server", old_value);
	    	
	    	changed = true;
	    }
	    
	    int maxUpSpeed 		= COConfigurationManager.getIntParameter("Max Upload Speed KBs",0);
	    int maxDownSpeed 	= COConfigurationManager.getIntParameter("Max Download Speed KBs",0);
	    
	    if(	maxUpSpeed > 0 && 
	    	maxUpSpeed < COConfigurationManager.CONFIG_DEFAULT_MIN_MAX_UPLOAD_SPEED &&
			(	maxDownSpeed == 0 || maxDownSpeed > (2*maxUpSpeed ))){
	    	
	      changed = true;
	      COConfigurationManager.setParameter("Max Upload Speed KBs", COConfigurationManager.CONFIG_DEFAULT_MIN_MAX_UPLOAD_SPEED);
	    }
	    
	
	    int peersRatio = COConfigurationManager.getIntParameter("Stop Peers Ratio",0);
	    if(peersRatio > 14) {
	      COConfigurationManager.setParameter("Stop Peers Ratio", 14);
	      changed = true;
	    }
	    
	    int minQueueingShareRatio = COConfigurationManager.getIntParameter("StartStopManager_iFirstPriority_ShareRatio");
	    if (minQueueingShareRatio < 500) {
	      COConfigurationManager.setParameter("StartStopManager_iFirstPriority_ShareRatio", 500);
	      changed = true;
	    }
	    
	    int iSeedingMin = COConfigurationManager.getIntParameter("StartStopManager_iFirstPriority_SeedingMinutes");
	    if (iSeedingMin < 90 && iSeedingMin != 0) {
	      COConfigurationManager.setParameter("StartStopManager_iFirstPriority_SeedingMinutes", 90);
	      changed = true;
	    }
	
	    int iDLMin = COConfigurationManager.getIntParameter("StartStopManager_iFirstPriority_DLMinutes");
	    if (iDLMin < 60*3 && iDLMin != 0) {
	      COConfigurationManager.setParameter("StartStopManager_iFirstPriority_DLMinutes", 60*3);
	      changed = true;
	    }
		
		int iIgnoreSPRatio = COConfigurationManager.getIntParameter("StartStopManager_iFirstPriority_ignoreSPRatio");
		if (iIgnoreSPRatio < 10 && iIgnoreSPRatio != 0) {
			COConfigurationManager.setParameter("StartStopManager_iFirstPriority_ignoreSPRatio", 10);
			changed = true;
		}
	
	    String uniqueId = COConfigurationManager.getStringParameter("ID",null);
	    if(uniqueId == null || uniqueId.length() != 20) {
	      uniqueId = RandomUtils.generateRandomAlphanumerics( 20 );
	      COConfigurationManager.setParameter("ID", uniqueId);
	      changed = true;
	    }
	    
	    int cache_max = COConfigurationManager.getIntParameter("diskmanager.perf.cache.size");
	    if (cache_max > COConfigurationManager.CONFIG_CACHE_SIZE_MAX_MB ) {
	      COConfigurationManager.setParameter("diskmanager.perf.cache.size", COConfigurationManager.CONFIG_CACHE_SIZE_MAX_MB );
	      changed = true;
	    }
	    if( cache_max < 1 ) {  //oops
	    	COConfigurationManager.setParameter("diskmanager.perf.cache.size", 4 );
	      changed = true;
	    }
	    	    
	    /**
	     * Special Patch for OSX users
	     */
	    if (Constants.isOSX) {
	      boolean sound = COConfigurationManager.getBooleanParameter("Play Download Finished",true);
	      // Command + Q destroys the window, then notifies SWT, making it
	      // hard to do a confirmation exit.
	      boolean confirmExit = COConfigurationManager.getBooleanParameter("confirmationOnExit");
	      
	      if ( sound || confirmExit ) {
	        COConfigurationManager.setParameter("Play Download Finished",false);
	        COConfigurationManager.setParameter("confirmationOnExit",false);
	        changed = true;
	      }
	    }
	    
	    
      if( Constants.isOSX ) {
        if( COConfigurationManager.getBooleanParameter( "enable_small_osx_fonts" ) ) {
          System.setProperty( "org.eclipse.swt.internal.carbon.smallFonts", "1" );
        }
        else {
          System.getProperties().remove( "org.eclipse.swt.internal.carbon.smallFonts" );
        }
        System.setProperty( "org.eclipse.swt.internal.carbon.noFocusRing", "1" );
      }
      
	    
	    //remove a trailing slash, due to user manually entering the path in config
	    String[] path_params = { "Default save path",
	                             "General_sDefaultTorrent_Directory",
	                             "Watch Torrent Folder Path",
	                             "Completed Files Directory" };
	    for( int i=0; i < path_params.length; i++ ) {
	      if( path_params[i].endsWith( SystemProperties.SEP ) ) {
	        String new_path = path_params[i].substring( 0, path_params[i].length() - 1 );
	        COConfigurationManager.setParameter( path_params[i], new_path );
	        changed = true;
	      }
	    }
      
      
      //2105 removed the language file web-update functionality,
      //but old left-over MessagesBundle.properties files in the user dir
      //cause display text problems, so let's delete them.
	    if( ConfigurationManager.getInstance().doesParameterNonDefaultExist( "General_bEnableLanguageUpdate" ) ) {        
        File user_dir = new File( SystemProperties.getUserPath() );
        File[] files = user_dir.listFiles( new FilenameFilter() {
          public boolean accept(File dir, String name) {
            if( name.startsWith( "MessagesBundle" ) && name.endsWith( ".properties" ) ) {
              return true;
            }
            return false;
          }
        });
        
        for( int i=0; i < files.length; i++ ) {
          File file = files[ i ];
          if( file.exists() ) {
          	if (Logger.isEnabled())
							Logger.log(new LogEvent(LOGID, LogEvent.LT_WARNING,
									"ConfigurationChecker:: removing old language file: "
											+ file.getAbsolutePath()));
            file.renameTo( new File( file.getParentFile(), "delme" + file.getName() ) );
          }
        }

        ConfigurationManager.getInstance().removeParameter( "General_bEnableLanguageUpdate" );
        changed = true;
      }
      
	    if ( FeatureAvailability.isAutoSpeedDefaultClassic()){
	    
	    	ConfigurationDefaults.getInstance().addParameter( SpeedManagerImpl.CONFIG_VERSION, 1 );	// 1 == classic, 2 == beta
	    }
	    
	    if ( COConfigurationManager.getIntParameter( "config.checker.level", 0 ) == 0 ){
	    	
	    	COConfigurationManager.setParameter( "config.checker.level", 1 );
	    	
	    	changed = true;
	    	
		    	// initial setting of auto-config for upload slots etc
		    
			String[]	params = { 
					"Max Uploads", 
					"enable.seedingonly.maxuploads", 
					"Max Uploads Seeding",
					"Max.Peer.Connections.Per.Torrent",
					"Max.Peer.Connections.Per.Torrent.When.Seeding.Enable",
					"Max.Peer.Connections.Per.Torrent.When.Seeding",
					"Max.Peer.Connections.Total",
					"Max Seeds Per Torrent"
			};
			
			boolean	has_been_set = false;
			
			for ( String param: params ){
			
				if ( COConfigurationManager.doesParameterNonDefaultExist( param )){
					
					has_been_set = true;
					
					break;
				}
			}
			
			if ( has_been_set ){
				
				COConfigurationManager.setParameter( "Auto Adjust Transfer Defaults", false );
			}
	    }
	
	    if(changed) {
	      COConfigurationManager.save();
	    } 
  	}finally{
  		
  		class_mon.exit();
  	}
  	
  	ConfigurationDefaults.getInstance().runVerifiers();
  }
  	
	public static final boolean
	isNewInstall()
	{
		return( new_install );
	}
	
	public static final boolean
	isNewVersion()
	{
		return( new_version );
	}
  
  public static void main(String args[]) {
    Integer obj = new Integer(1);
    HashMap test = new HashMap();
    int collisions = 0;
    for(int i = 0 ; i < 1000000 ; i++) {
      String id = RandomUtils.generateRandomAlphanumerics( 20 );
      if(test.containsKey(id)) {
        collisions++;
      } else {
        test.put(id,obj);
      }
      if(i%1000 == 0) {
        System.out.println(i + " : " + id + " : " + collisions);
      }
    }
    System.out.println("\n" + collisions);
  }
  
  
}
