/*
 * Copyright 2008 Federal Chancellery Austria and
 * Graz University of Technology
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.gv.egiz.bku.local.webapp;

import at.gv.egiz.bku.local.stal.LocalSTALFactory;
import at.gv.egiz.stal.QuitRequest;
import at.gv.egiz.stal.STAL;
import at.gv.egiz.stal.STALResponse;
import at.gv.egiz.stal.ext.PINManagementRequest;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collections;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * PINManagementBKUWorker for non-applet version
 * @author Clemens Orthacker <clemens.orthacker@iaik.tugraz.at>
 */
public class PINManagementServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  private final Logger log = LoggerFactory.getLogger(PINManagementServlet.class);

  LocalSTALFactory stalFactory;

  public PINManagementServlet() {
    stalFactory = new LocalSTALFactory();
    try {
      stalFactory.setHelpURL("http://localhost:3495/help/");
    } catch (MalformedURLException e) {
      log.info("Failed to set help URL.", e);
    }
  }

  /**
   * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
   * @param request servlet request
   * @param response servlet response
   * @throws ServletException if a servlet-specific error occurs
   * @throws IOException if an I/O error occurs
   */
  protected void processRequest(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {

    STAL pinMgmtSTAL = stalFactory.createSTAL();
    List<STALResponse> stalResps = pinMgmtSTAL.handleRequest(Collections.singletonList(new PINManagementRequest()));
    log.debug("Received STAL reponse {}.", stalResps.get(0).getClass());
    pinMgmtSTAL.handleRequest(Collections.singletonList(new QuitRequest()));

    String redirect = request.getParameter("redirect");
    if (redirect != null) {
      String referer = request.getHeader("Referer");
      if (referer != null) {
        redirect = new URL(new URL(referer), redirect).toExternalForm();
      }
      response.sendRedirect(redirect);
    } else {
      response.setStatus(HttpServletResponse.SC_OK);
    }
  }

  // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
  /**
   * Handles the HTTP <code>GET</code> method.
   * @param request servlet request
   * @param response servlet response
   * @throws ServletException if a servlet-specific error occurs
   * @throws IOException if an I/O error occurs
   */
  @Override
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {
    processRequest(request, response);
  }

  /**
   * Handles the HTTP <code>POST</code> method.
   * @param request servlet request
   * @param response servlet response
   * @throws ServletException if a servlet-specific error occurs
   * @throws IOException if an I/O error occurs
   */
  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {
    processRequest(request, response);
  }

  /**
   * Returns a short description of the servlet.
   * @return a String containing servlet description
   */
  @Override
  public String getServletInfo() {
    return "Short description";
  }// </editor-fold>
}