/*
    This file is part of RouteConverter.

    RouteConverter 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, or
    (at your option) any later version.

    RouteConverter 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 RouteConverter; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Copyright (C) 2007 Christian Pesch. All Rights Reserved.
*/

package slash.navigation.babel;

import slash.navigation.gpx.GpxRoute;
import slash.common.io.CompactCalendar;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * Reads and writes IGO8 Track (.trk) files.
 *
 * @author Christian Pesch
 */

public class Igo8TrackFormat extends BabelFormat {
    public String getExtension() {
        return ".trk";
    }

    public String getName() {
        return "IGO8 Track (*" + getExtension() + ")";
    }

    protected String getBabelFormatName() {
        return "igo8";
    }

    public boolean isSupportsMultipleRoutes() {
        return false;
    }

    protected boolean isStreamingCapable() {
        return false;
    }

    private boolean isValidRoute(GpxRoute route) {
        double length = route.getLength();
        double distancePerPosition = length / route.getPositionCount();
        return distancePerPosition < 1000000.0;
    }

    public List<GpxRoute> read(InputStream source, CompactCalendar startDate) throws IOException {
        List<GpxRoute> routes = super.read(source, startDate);
        if (routes == null)
            return null;

        List<GpxRoute> result = new ArrayList<GpxRoute>();
        for (GpxRoute route : routes) {
            // is really greedy in parsing the data of NetS files
            if (isValidRoute(route))
                result.add(route);
        }
        return result.size() > 0 ? result : null;
    }
}