/*
      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 uk.nhs.interoperability.client.samples.smsp;
  
  import java.io.IOException;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  import javax.xml.parsers.ParserConfigurationException;
  
  import org.apache.commons.lang.StringEscapeUtils;
  import org.w3c.dom.Document;
  import org.xml.sax.SAXException;
  
  import uk.nhs.interoperability.infrastructure.ITKAddress;
  import uk.nhs.interoperability.infrastructure.ITKAddressImpl;
  import uk.nhs.interoperability.util.Logger;
  import uk.nhs.interoperability.util.xml.DomUtils;
  
  /**
   * The Class VerifyNHSNumberServlet.
   *
   * @author Michael Odling-Smee
   * @author Nicholas Jones
   * @since 0.1
   */
  public class VerifyNHSNumberServlet extends HttpServlet {
  	
  	/** The Constant serialVersionUID. */
  	private static final long serialVersionUID = 1L;
         
      /**
       * Instantiates a new verify nhs number servlet.
       */
      public VerifyNHSNumberServlet() {
          super();
      }
  
  	/* (non-Javadoc)
  	 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
  	 */
  	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  		processRequest(request, response);
  	}
  
  	/* (non-Javadoc)
  	 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
  	 */
  	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  		processRequest(request, response);
  	}
  	
  	/**
  	 * Process request.
  	 *
  	 * @param request the request
  	 * @param response the response
  	 * @throws ServletException the servlet exception
  	 * @throws IOException Signals that an I/O exception has occurred.
  	 */
  	private void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  
  		System.out.println("this is VerifyNHSNumberServlet.processRequest");
  		String nhsNumber = request.getParameter("nhsNumber");
  		String dateOfBirth = request.getParameter("dateOfBirth");
  		String givenName = request.getParameter("givenName");
  		String surname = request.getParameter("surname");
  		String postcode = request.getParameter("postcode");
  		String serviceAddress = request.getParameter("serviceAddress");
  		ITKAddress itkServiceAddress = new ITKAddressImpl(serviceAddress);
  
          HttpSession session = request.getSession(true);
          session.removeAttribute("nhsNumber");
          session.removeAttribute("verified");
          session.removeAttribute("responseCode");
          session.removeAttribute("errorMessage");
          session.removeAttribute("responseMessage");
  		
  		SpineMiniServicesClient client = new SpineMiniServicesClient();
  		
  		VerifyNHSNumberRequest doc = new VerifyNHSNumberRequest();
  		doc.nhsNumber = nhsNumber;
  		doc.dateOfBirth = dateOfBirth;
  		doc.givenName = givenName;
  		doc.surname = surname;
 		doc.postcode = postcode;
 		VerifyNHSNumberResponse resp = client.verifyNHSNumber(doc,itkServiceAddress);
 		if (resp == null) {
 			Logger.info("SMSP VNN FAILED - No response document");
             session.setAttribute("errorMessage", "Sorry this hasn't worked out this time. Please try again later.");
 		} else {
 			Logger.info("SMSP VNN COMPLETE. RESPONSE CODE:" + resp.getResponseCode());
 			Logger.info("SMSP call succeeded");
 			
 	        //Obtain the session object, create a new session if doesn't exist
             session.setAttribute("nhsNumber", resp.getNhsNumber());
             session.setAttribute("verified", Boolean.toString((resp.getVerifiedIndicator())));
             session.setAttribute("responseCode", resp.getResponseCode());
 			try {
 				Document responseDoc = DomUtils.parse(resp.getPayload());
 				String prettyPayload = DomUtils.serialiseToXML(responseDoc, DomUtils.PRETTY_PRINT);
  	            session.setAttribute("responseMessage", StringEscapeUtils.escapeHtml(prettyPayload));
 			} catch (SAXException e) {
 				Logger.error("SMSP VNN FAILED - SAXException",e);
 	            session.setAttribute("errorMessage", "Sorry this really hasn't worked out this time. Please try again later.");
 			} catch (ParserConfigurationException e) {
 				Logger.error("SMSP VNN FAILED - ParserConfigurationException",e);
 	            session.setAttribute("errorMessage", "Sorry this really hasn't worked out this time. Please try again later.");
 			}
 		}
 		response.sendRedirect("./VerifyNHSNumberResponse.jsp");
 
 	}
 
 }