/************************************************************************************
 * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University
 * All rights reserved.
 * Refer to LICENSE for terms and conditions of use.
 ***********************************************************************************/
package vnsim.applications.vitp.services;


import java.util.*;

import vnsim.applications.trafficview.SimulatedCarInfo;
import vnsim.applications.vitp.utils.*;
import vnsim.core.*;



public class RouteInfo extends Service {

	// this is an example of a service

	SimulatedCarInfo info;

	public RouteInfo(SimulatedCarInfo info) {
		this.info = info;
	}

	public VITPRequest satisfy(VITPRequest req, HashMap params) {

		// takes the request, reduces the count field in the URI, and adds a
		// line
		// in the message body, of the type "speed=40";
		// params is a map of parameters of the local node (among them should be
		// 'speed')
//		System.out.println("Route Information modifying a request!");
		int speed =(int) info.getSpeed();

		try {
			VITPRequest request = (VITPRequest) req;
			req.addToBody("speed=" + speed);
			if (info.getRealPos().currentRoadState != 0) {
				req.addToBody("R" + info.getRoadIdx() + "P"
						+ info.getPointIdx() + "C" + info.getRealPos().currentRoadState);
			}
			// reduce cnt by one
			Vector<String> rcs = URIParser.getRCExpressions(request.getURI());
			if (rcs == null)
				return req;
			for (int i = 0; i < rcs.size(); i++) {
				if (((String) rcs.elementAt(i)).startsWith("cnt")) {
					String cntSir = (String) rcs.elementAt(i);
					int i1 = cntSir.indexOf('=');
					if (i1 == -1)
						return req;
					Integer old = new Integer(cntSir.substring(i1 + 1));
					int newcnt = old.intValue() - 1;
					String newSir = "cnt=" + newcnt;
					rcs.removeElementAt(i);
					rcs.addElement(newSir);

					String oldUri = request.getURI();
					String newUri = URIParser.getURIFromParts(URIParser
							.getType(oldUri), URIParser.getTag(oldUri), rcs,
							URIParser.getParams(oldUri));
					request.setURI(newUri);
					return request;
				}
			}
			return req;
		} catch (Exception ex) {
			System.out.println("WARNING! EXCEPTION in VehicleTraffic:"
					+ ex.toString());
			return req;
		}
	}
}