package servlets.module;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
import org.owasp.esapi.ESAPI;
import org.owasp.esapi.Encoder;

import utils.ModulePlan;
import utils.ShepherdLogManager;
import utils.Validate;
import dbProcs.Getter;

/**
 * Class used to return a fresh incremental menu upon completion of a module in incremental mode.
 * <br/><br/>
 * This file is part of the Security Shepherd Project.
 * 
 * The Security Shepherd project 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 3 of the License, or
 * (at your option) any later version.<br/>
 * 
 * The Security Shepherd project 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.<br/>
 * 
 * You should have received a copy of the GNU General Public License
 * along with the Security Shepherd project.  If not, see <http://www.gnu.org/licenses/>. 
 * @author Mark Denihan
 *
 */
public class RefreshMenu extends HttpServlet
{
	private static final long serialVersionUID = 1L;
	private static org.apache.log4j.Logger log = Logger.getLogger(GetModule.class);
	/**
	 * This servlet returns a fresh version of the module menu bar. This is used when completing levels, changing the floor plan or when opening/closing challenges.
	 * @param csrfToken
	 */
	public void doPost (HttpServletRequest request, HttpServletResponse response) 
	throws ServletException, IOException
	{
		//Setting IpAddress To Log and taking header for original IP if forwarded from proxy
		ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
		log.debug("&&& servlets.module.RefreshMenu &&&");
		PrintWriter out = response.getWriter();  
		out.print(getServletInfo());
		HttpSession ses = request.getSession(true);
		
		// Translation Stuff
		Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
		ResourceBundle bundle = ResourceBundle.getBundle("i18n.text", locale);
		
		if(Validate.validateSession(ses))
		{
			ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"), ses.getAttribute("userName").toString());
			log.debug("Current User: " + ses.getAttribute("userName").toString());
			Cookie tokenCookie = Validate.getToken(request.getCookies());
			Object tokenParmeter = request.getParameter("csrfToken");
			if(Validate.validateTokens(tokenCookie, tokenParmeter))
			{
				try 
				{
					Encoder encoder = ESAPI.encoder();
					String ApplicationRoot = getServletContext().getRealPath("");
					String userId = (String)ses.getAttribute("userStamp");
					if(ModulePlan.isIncrementalFloor())
					{
						log.debug("Returning CTF Menu");
						out.write(Getter.getIncrementalModules(ApplicationRoot, userId,  ses.getAttribute("lang").toString(), (String)tokenParmeter)
								+ "<script>startScrollsBars();makeSearchList();</script>");
					}
					else if (ModulePlan.isOpenFloor())
					{
						log.debug("Returning Open Floor Menu");
						out.write("<li><a id=\"lessonList\" href=\"javascript:;\"><div class=\"menuButton\">" + bundle.getString("generic.text.lessons") + 
						"</div></a><ul id=\"theLessonList\" style=\"display: none;\">" +
						Getter.getLessons(ApplicationRoot, userId, locale) +	"</ul></li><li>" +
						"<a id=\"challengeList\" href=\"javascript:;\"><div class=\"menuButton\">" + 
						bundle.getString("generic.text.challenges") + "</div></a><ul id=\"theChallengeList\" style=\"display: none;\">" + 
						Getter.getChallenges(ApplicationRoot, userId, locale) + "</ul></li>"
						+ "<script>applyMenuButtonActionsOpenOrTourney('" + encoder.encodeForHTML(tokenParmeter.toString()) + "', \"" + encoder.encodeForHTML(bundle.getString("generic.text.sorryError")) + "\");openFloorToggleFunctions();makeSearchList();</script>");
					}
					else
					{
						if (ModulePlan.isTournyFloor())
							log.fatal("Could not Pick ModulePlan to use (All False). Using Tournament Instead");
						log.debug("Returning Tournament Floor Menu");
						out.write(Getter.getTournamentModules(ApplicationRoot, userId, locale)
								+ "<script>applyMenuButtonActionsOpenOrTourney('" + encoder.encodeForHTML(tokenParmeter.toString()) + "', \"" + encoder.encodeForHTML(bundle.getString("generic.text.sorryError")) + "\");tournamentToggleFunctions();startScrollsBars();makeSearchList();</script>");
					}
				}
				catch (Exception e)
				{
					log.error("Refresh Menu Error: " + e.toString());
				}
			}
			else
			{
				log.debug("CSRF Tokens did not match");
			}
		}
		else
		{
			log.error("Invalid Session Detected");
			out.write("Your are logged out! Please sign back in!");
		}
		log.debug("&&& END RefreshMenu &&&");
	}
}