/*

  *   SONEWS News Server

  *   see AUTHORS for the list of contributors

  *

  *   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 3 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, see <http://www.gnu.org/licenses/>.

  */

 package org.sonews;

 import java.sql.Driver;

 import java.sql.DriverManager;

 import java.util.Enumeration;

 import java.util.Date;

 import org.sonews.config.Config;

 import org.sonews.daemon.ChannelLineBuffers;

 import org.sonews.daemon.Connections;

 import org.sonews.daemon.NNTPDaemon;

 import org.sonews.feed.FeedManager;

 import org.sonews.mlgw.MailPoller;

 import org.sonews.storage.StorageBackendException;

 import org.sonews.storage.StorageManager;

 import org.sonews.storage.StorageProvider;

 import org.sonews.util.Log;

 import org.sonews.util.Purger;

 import org.sonews.util.io.Resource;

 /**

  * Startup class of the daemon.

  * @author Christian Lins

  * @since sonews/0.5.0

  */

 public final class Main

 {

   private Main()

   {

   }

   /** Version information of the sonews daemon */

   public static final String VERSION = "sonews/1.0.0";

   public static final Date   STARTDATE = new Date();

   /**

    * The main entrypoint.

    * @param args

    * @throws Exception

    */

   public static void main(String[] args) throws Exception

   {

     System.out.println(VERSION);

     Thread.currentThread().setName("Mainthread");

     // Command line arguments

     boolean feed    = false;  // Enable feeding?

     boolean mlgw    = false;  // Enable Mailinglist gateway?

     int     port    = -1;

     for(int n = 0; n < args.length; n++)

     {

       if(args[n].equals("-c") || args[n].equals("-config"))

       {

         Config.inst().set(Config.LEVEL_CLI, Config.CONFIGFILE, args[++n]);

         System.out.println("Using config file " + args[n]);

       }

       else if(args[n].equals("-dumpjdbcdriver"))

       {

         System.out.println("Available JDBC drivers:");

         Enumeration<Driver> drvs =  DriverManager.getDrivers();

         while(drvs.hasMoreElements())

         {

           System.out.println(drvs.nextElement());

         }

         return;

       }

       else if(args[n].equals("-feed"))

       {

         feed = true;

       }

       else if(args[n].equals("-h") || args[n].equals("-help"))

       {

         printArguments();

         return;

       }

       else if(args[n].equals("-mlgw"))

       {

         mlgw = true;

       }

       else if(args[n].equals("-p"))

       {

         port = Integer.parseInt(args[++n]);

       }

       else if(args[n].equals("-v") || args[n].equals("-version"))

       {

         // Simply return as the version info is already printed above

         return;

       }

     }

     // Try to load the JDBCDatabase;

     // Do NOT USE BackendConfig or Log classes before this point because they require

     // a working JDBCDatabase connection.

     try

     {

       StorageProvider sprov =

         StorageManager.loadProvider("org.sonews.storage.impl.JDBCDatabaseProvider");

       StorageManager.enableProvider(sprov);

       // Make sure some elementary groups are existing

       if(!StorageManager.current().isGroupExisting("control"))

       {

         StorageManager.current().addGroup("control", 0);

         Log.msg("Group 'control' created.", true);

       }

     }

     catch(StorageBackendException ex)

     {

       ex.printStackTrace();

       System.err.println("Database initialization failed with " + ex.toString());

       System.err.println("Make sure you have specified the correct database" +

         " settings in sonews.conf!");

       return;

     }

     ChannelLineBuffers.allocateDirect();

     // Add shutdown hook

     Runtime.getRuntime().addShutdownHook(new ShutdownHook());

     // Start the listening daemon

     if(port <= 0)

     {

       port = Config.inst().get(Config.PORT, 119);

     }

     final NNTPDaemon daemon = NNTPDaemon.createInstance(port);

     daemon.start();

     // Start Connections purger thread...

     Connections.getInstance().start();

     // Start mailinglist gateway...

     if(mlgw)

     {

       new MailPoller().start();

     }

     // Start feeds

     if(feed)

     {

       FeedManager.startFeeding();

     }

     Purger purger = new Purger();

     purger.start();

     // Wait for main thread to exit (setDaemon(false))

     daemon.join();

   }

   private static void printArguments()

   {

     String usage = Resource.getAsString("helpers/usage", true);

     System.out.println(usage);

   }

 }