/*
    * Copyright (c) 2002-2022, City of Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.portal.web.progressmanager;
  
  import fr.paris.lutece.portal.service.progressmanager.ProgressManagerService;
  import fr.paris.lutece.util.json.ErrorJsonResponse;
  import fr.paris.lutece.util.json.JsonResponse;
  import fr.paris.lutece.util.json.JsonUtil;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * Servlet to manage progress feeds
   * 
   * @author lutece team
   */
  public class ProgressManagerServlet extends HttpServlet
  {
  
      private static final long serialVersionUID = -6400074588556875395L;
  
      private static final String PARAMETER_PROGRESS = "progress";
      private static final String PARAMETER_REPORT = "report";
      private static final String PARAMETER_TOKEN = "token";
      private static final String PARAMETER_FROM_LINE = "fromLine";
  
      private static final String CONTENT_TYPE = "application/json";
      private static final String STATUS_NOT_FOUND = "not found";
      private static final String STATUS_BAD_PARAMETER = "bad parameter";
  
      private static final String ATTRIBUTE_NAME_LAST_LINE = "lastLine";
      private static final String ATTRIBUTE_NAME_LINES = "lines";
  
      /**
       * Initialize the servlet
       * 
       * @param config
       *            The servlet config
       * @throws ServletException
       *             If an exception occurs that interrupts the servlet's normal operation
       */
      public void init( ServletConfig config ) throws ServletException
      {
          super.init( config );
      }
  
      /**
       * Process HTTP Post request
       * 
       * @param request
       *            The http request
       * @param response
       *            The http response
       * @throws ServletException
       *             If an exception occurs that interrupts the servlet's normal operation
       * @throws IOException
       *             If an I/O exception occurs
       */
      @Override
      public void doPost( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException
     {
         response.setContentType( CONTENT_TYPE );
         PrintWriter out = response.getWriter( );
 
         // token
         String strToken = (String) request.getParameter( PARAMETER_TOKEN );
 
         if ( strToken == null || strToken.isEmpty( ) )
         {
             out.println( JsonUtil.buildJsonResponse( new ErrorJsonResponse( STATUS_NOT_FOUND ) ) );
             out.flush( );
             out.close( );
             return;
         }
 
         ProgressManagerService progressManagerService = ProgressManagerService.getInstance( );
 
         if ( !progressManagerService.isRegistred( strToken ) )
         {
             out.println( JsonUtil.buildJsonResponse( new ErrorJsonResponse( STATUS_NOT_FOUND ) ) );
             out.flush( );
             out.close( );
             return;
         }
 
         if ( request.getParameter( PARAMETER_PROGRESS ) != null )
         {
             out.println( JsonUtil.buildJsonResponse( new JsonResponse( progressManagerService.getProgressStatus( strToken ) ) ) );
             out.flush( );
             out.close( );
             return;
         }
         else
             if ( request.getParameter( PARAMETER_REPORT ) != null )
             {
                 int iFromLine = -1;
                 try
                 {
                     iFromLine = Integer.parseInt( request.getParameter( PARAMETER_FROM_LINE ) );
                 }
                 catch( NumberFormatException e )
                 {
                     out.println( JsonUtil.buildJsonResponse( new ErrorJsonResponse( STATUS_BAD_PARAMETER ) ) );
                 }
 
                 Map<String, Object> mapResponse = new HashMap<>( );
                 List<String> reportLines = progressManagerService.getReport( strToken, iFromLine );
                 mapResponse.put( ATTRIBUTE_NAME_LAST_LINE, iFromLine + reportLines.size( ) );
                 mapResponse.put( ATTRIBUTE_NAME_LINES, reportLines );
                 out.println( JsonUtil.buildJsonResponse( new JsonResponse( mapResponse ) ) );
                 out.flush( );
                 out.close( );
                 return;
             }
             else
             {
                 out.println( JsonUtil.buildJsonResponse( new ErrorJsonResponse( STATUS_NOT_FOUND ) ) );
             }
 
         out.flush( );
         out.close( );
     }
 }