/*
 * Copyright (C) 2011.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 or
 * version 2 as published by the Free Software Foundation.
 *
 * 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.
 */
package uk.me.parabola.mkgmap.reader.osm;

import java.util.HashSet;
import java.util.Set;

import uk.me.parabola.mkgmap.osmstyle.StyledConverter;
import uk.me.parabola.util.EnhancedProperties;

/**
 * This hook performs some steps required for routing. <br/>
 * At the moment the only function is to add tags used for routing to the
 * overall tag list. The rest of the routing work is done in the 
 * {@link StyledConverter} class.
 * @author WanMil
 *
 */
public class RoutingHook implements OsmReadingHooks {

	private final Set<String> usedTags = new HashSet<>();
	
	@Override
	public boolean init(ElementSaver saver, EnhancedProperties props, Style style) {
		// only enabled if the route option is set
		if (props.containsKey("route")) {

			usedTags.add("except");
			usedTags.add("restriction");
			usedTags.add("restriction:foot");
			usedTags.add("restriction:hgv");
			usedTags.add("restriction:motorcar");
			usedTags.add("restriction:vehicle");
			usedTags.add("restriction:motor_vehicle");
			usedTags.add("restriction:bicycle");
			usedTags.add("restriction:bus");

			if (props.getProperty("old-style", false)) {
				// the access tags need to be loaded if the old style handling
				// is active and access restrictions are handled by the java
				// source code and not by the style
				usedTags.add("access");
				usedTags.add("bicycle");
				usedTags.add("carpool");
				usedTags.add("delivery");
				usedTags.add("emergency");
				usedTags.add("foot");
				usedTags.add("goods");
				usedTags.add("hgv");
				usedTags.add("motorcar");
				usedTags.add("motorcycle");
				usedTags.add("psv");
				usedTags.add("route");
				usedTags.add("taxi");
			}
			int admLevelNod3 = props.getProperty("add-boundary-nodes-at-admin-boundaries", 2);
			if (admLevelNod3 > 0) {
				usedTags.add("boundary");
				usedTags.add("admin_level");
			}
			return true;
		}

		return false;
	}

	@Override
	public Set<String> getUsedTags() {
		return usedTags;
	}

}
