/*

  * Quoridor server and related libraries

  * Copyright (C) 2009-2010 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * 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 cz.xelfi.quoridor.statistics.EloList;

 import cz.xelfi.quoridor.webidor.GameId;

 import cz.xelfi.quoridor.webidor.GameStatus;

 import javax.ws.rs.GET;

 import javax.ws.rs.Path;

 import javax.ws.rs.PathParam;

 import javax.ws.rs.Produces;

 import javax.ws.rs.core.MediaType;

 import java.util.ArrayList;

 import java.util.Calendar;

 import java.util.GregorianCalendar;

 /**

  *

  * @author Martin Rexa

  */

 public final class Elo {

     private EloList list;

     private ArrayList<EloList> listHistory;

     private boolean firstGame;

     static long day = 1000 * 60 * 60 * 24;

     public Elo(){

         listHistory = new ArrayList<EloList>();

         list = new EloList();

         listHistory.add(list);

         firstGame = true;

     }

     public void processGame(GameId gId){

         GameStatus status = gId.getStatus();

         splitList(gId.getModified());

         if(status.equals(GameStatus.whiteWon)){

             list.putResult(gId.getWhite(), gId.getBlack());

         }else if(status.equals(GameStatus.blackWon)){

             list.putResult(gId.getBlack(), gId.getWhite());

         }

     }

     private void splitList(long gameModified){

         if(firstGame){

             firstGame = false;

             list.setEndDate(computeListEndDate(gameModified));

         }else{

             if(gameModified > list.getEndDate()){

                 list = new EloList(list);

                 listHistory.add(0,list);

                 list.setEndDate(computeListEndDate(gameModified));

             }

         }

     }

     private long computeListEndDate(long modified){

         Calendar now = new GregorianCalendar();

         Calendar cModified = new GregorianCalendar();

         cModified.setTimeInMillis(modified);

         Calendar result = new GregorianCalendar();

         result.clear();

         result.set(Calendar.YEAR, cModified.get(Calendar.YEAR));

         result.set(Calendar.MONTH, cModified.get(Calendar.MONTH)+1);

         return result.getTimeInMillis()-1;

     }

     @GET

     @Path("list")

     @Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_XML })

     public EloList getList(){

         return list;

     }

     @GET

     @Path("list/{id}")

     @Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_XML })

     public EloList getHistoryList(@PathParam("id") Integer id){

         if(id == null)

             return null;

         if(id >= listHistory.size())

             return null;

         return listHistory.get(id);

     }

     @GET

     @Path("{username}")

     @Produces(MediaType.TEXT_PLAIN)

     public String getElo(@PathParam("username") String id){

         list.getElo(id);

         return Double.toString(list.getElo(id));

     }

 }