/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

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 *

 * Contributor(s):

 *

 * Portions Copyrighted 2010 Martin Rexa

 */

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(;;){

            synchronized (monitor) {

                monitor.wait(timeout);

            }

            processGames();

        }

    }

    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());

        }

    }

}