/*
    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.url;

import slash.navigation.base.BaseUrlFormat;
import slash.navigation.base.ParserContext;
import slash.navigation.base.RouteCharacteristics;
import slash.navigation.base.Wgs84Route;
import slash.navigation.common.NavigationPosition;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.util.regex.Pattern.MULTILINE;
import static slash.common.io.Transfer.trim;

/**
 * Reads routes from URL Reference (.url) files.
 *
 * @author Christian Pesch
 */

public class UrlFormat extends BaseUrlFormat {
    private static final Pattern URL_PATTERN = Pattern.
            compile(".*?((file|mailto|(news|(ht|f)tp(s?))\\://){1}\\S+).*?", MULTILINE);

    public String getExtension() {
        return ".url";
    }

    public String getName() {
        return "URL Reference (" + getExtension() + ")";
    }

    public int getMaximumPositionCount() {
        throw new UnsupportedOperationException();
    }

    public boolean isSupportsWriting() {
        return false;
    }

    public boolean isSupportsMultipleRoutes() {
        throw new UnsupportedOperationException();
    }

    public boolean isWritingRouteCharacteristics() {
        throw new UnsupportedOperationException();
    }

    public <P extends NavigationPosition> Wgs84Route createRoute(RouteCharacteristics characteristics, String name, List<P> positions) {
        throw new UnsupportedOperationException();
    }

    protected String findURL(String text) {
        text = replaceLineFeeds(text, " ");
        Matcher urlMatcher = URL_PATTERN.matcher(text);
        if (!urlMatcher.matches())
            return null;
        return trim(urlMatcher.group(1));
    }

    protected void processURL(String url, String encoding, ParserContext<Wgs84Route> context) throws IOException {
        context.parse(url);
    }

    public void write(Wgs84Route route, PrintWriter writer, int startIndex, int endIndex) throws IOException {
        throw new UnsupportedOperationException();
    }
}