/**

  * Quoridor server and related libraries

  * Copyright (C) 2009-2010 Martin Rexa

  *

  * 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.

  *

  * 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. Look for COPYING file in the top folder.

  * If not, see http://www.gnu.org/licenses/.

  */

 package cz.xelfi.quoridor.statistics.resources;

 import com.sun.jersey.api.container.httpserver.HttpServerFactory;

 import com.sun.jersey.api.core.PackagesResourceConfig;

 import com.sun.jersey.api.core.ResourceConfig;

 import com.sun.jersey.spi.resource.Singleton;

 import com.sun.net.httpserver.HttpServer;

 import java.io.File;

 import java.io.IOException;

 import java.util.Comparator;

 import java.util.List;

 import java.util.Collections;

 import java.net.ServerSocket;

 import javax.ws.rs.Path;

 import cz.xelfi.quoridor.webidor.resources.Games;

 import cz.xelfi.quoridor.webidor.Game;

 /**

  *

  * @author Martin Rexa

  */

 @Path("/")

 @Singleton

 public class Statistics {

     static final Comparator<Game> OLDEST_FIRST = new OldestFirst();

     static Elo elo;

     static Openings openings;

     @Path("elo")

     public Elo getElo() {

         return elo;

     }

     @Path("openings")

     public Openings getOpenings() {

         return openings;

     }

     public static void main( String[] args ) throws IOException, InterruptedException

     {

         int port = 9444;

         // timeout between reprocessing games in miliseconds

         long timeout = 1000 * 60 * 60 * 24;

 //        long timeout = 1000 * 10;

         try {

             port = Integer.parseInt(args[0]);

         } catch (Exception ex) {

             // OK

         }

         if (System.getProperty("quoridor.dir") == null) {

             File home = new File(System.getProperty("user.home"));

             File quoridor = new File(home, ".quoridor");

             System.setProperty("quoridor.dir", quoridor.getPath());

         }

         long lastExec = System.currentTimeMillis();

         processGames();

         HttpServer s = start(port);

         System.out.println("Statistics started at port " + port);

         Object monitor = new Object();

         // Wait until begining of next period. If timeout is one day, then next

         // processing will be done after midnight

         synchronized (monitor) {

             monitor.wait(timeout - (lastExec % timeout));

         }

         for(;;){

             processGames();

             synchronized (monitor) {

                 monitor.wait(timeout);

             }

         }

     }

     public static HttpServer start(int port) throws IOException {

         if (port == -1) {

             ServerSocket ss = new ServerSocket(0);

             port =ss.getLocalPort();

             ss.close();

         }

         final String baseUri = "http://localhost:" + port + "/";

         if (System.getProperty("quoridor.dir") == null) {

             File home = new File(System.getProperty("user.home"));

             File quoridor = new File(home, ".quoridor");

             System.setProperty("quoridor.dir", quoridor.getPath());

         }

         ResourceConfig rc = new PackagesResourceConfig("cz.xelfi.quoridor.statistics");

         HttpServer server = HttpServerFactory.create(baseUri, rc);

         server.start();

         return server;

     }

     public static void processGames(){

         Elo eloTmp = new Elo();

         Openings openingsTmp = new Openings();

         final String prop = System.getProperty("quoridor.dir"); // NOI18N

         if (prop == null) {

             throw new IllegalStateException("quoridor.dir property must be specified"); // NOI18N

         }

         File path = new File(prop);

         path.mkdirs();

         File fGames = new File(path, "games");

         //fGames.mkdirs();

         Games games = new Games(fGames, null);

         List<Game> lGames = games.getGames();

         Collections.sort(lGames, OLDEST_FIRST);

         // process games

         for(Game g: lGames){

             if(g.getId().isFinished()){

                 eloTmp.processGame(g.getId());

                 openingsTmp.processGame(g);

             }

         }

         elo = eloTmp;

         openings = openingsTmp;

     }

     private static final class OldestFirst implements Comparator<Game> {

         public int compare(Game g1, Game g2) {

             if(g1.getId() == g2.getId())

                 return 0;

             long diff = g2.getId().getModified() - g1.getId().getModified();

             if (diff != 0) {

                 return diff < 0 ? 1 : -1;

             }

             return g1.getId().getId().compareTo(g2.getId().getId());

         }

     }

 }