/*
    * Copyright (c) 2002-2014, Mairie de 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.plugins.form.web;
  
  import com.keypoint.PngEncoder;
  
  import fr.paris.lutece.plugins.form.business.EntryHome;
  import fr.paris.lutece.plugins.form.business.GraphType;
  import fr.paris.lutece.plugins.form.business.GraphTypeHome;
  import fr.paris.lutece.plugins.form.business.IEntry;
  import fr.paris.lutece.plugins.form.business.ResponseHome;
  import fr.paris.lutece.plugins.form.business.StatisticEntrySubmit;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.portal.service.plugin.PluginService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  
  import org.jfree.chart.ChartRenderingInfo;
  import org.jfree.chart.JFreeChart;
  import org.jfree.chart.entity.StandardEntityCollection;
  
  import java.awt.image.BufferedImage;
  
  import java.util.List;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  
  /**
   *
   *  class DoDownloadGraph
   *
   */
  public class DoDownloadGraph
  {
      private static final String PARAMETER_ID_ENTRY = "id_entry";
      private static final String PARAMETER_ID_GRAPH_TYPE = "id_graph_type";
      private static final String PARAMETER_GRAPH_THREE_DIMENSION = "graph_three_dimension";
      private static final String PARAMETER_GRAPH_LABEL_VALUE = "graph_label_value";
      private static final String PARAMETER_PLUGIN_NAME = "plugin_name";
      private static final String EMPTY_STRING = "";
  
      /**
       * Write in the http response the statistic graph of a question
       * @param request the http request
       * @param response The http response
       *
       */
      public void doGenerateGraph( HttpServletRequest request, HttpServletResponse response )
      {
          JFreeChart chart = null;
          Plugin plugin = null;
          IEntry entry;
          GraphType graphType = null;
          int nIdEntry = -1;
          int nIdGraphType = -1;
  
          String strIdEntry = request.getParameter( PARAMETER_ID_ENTRY );
          String strIdGraphType = request.getParameter( PARAMETER_ID_GRAPH_TYPE );
          String strPluginName = request.getParameter( PARAMETER_PLUGIN_NAME );
          String strGraphThreeDimension = request.getParameter( PARAMETER_GRAPH_THREE_DIMENSION );
          String strGraphLabelValue = request.getParameter( PARAMETER_GRAPH_LABEL_VALUE );
  
          boolean nGraphThreeDimension = false;
          boolean nGraphLabelValue = false;
  
          if ( ( strGraphThreeDimension != null ) && strGraphThreeDimension.equals( "1" ) )
          {
             nGraphThreeDimension = true;
         }
 
         if ( ( strGraphLabelValue != null ) && strGraphLabelValue.equals( "1" ) )
         {
             nGraphLabelValue = true;
         }
 
         if ( ( strIdEntry != null ) && !strIdEntry.equals( EMPTY_STRING ) && ( strIdGraphType != null ) &&
                 !strIdGraphType.equals( EMPTY_STRING ) && ( strPluginName != null ) &&
                 !strPluginName.equals( EMPTY_STRING ) )
         {
             plugin = PluginService.getPlugin( strPluginName );
 
             try
             {
                 nIdEntry = Integer.parseInt( strIdEntry );
                 nIdGraphType = Integer.parseInt( strIdGraphType );
             }
             catch ( NumberFormatException ne )
             {
                 AppLogService.error( ne );
             }
 
             entry = EntryHome.findByPrimaryKey( nIdEntry, plugin );
 
             List<StatisticEntrySubmit> listStatistic = ResponseHome.getStatisticByIdEntry( nIdEntry, plugin );
             graphType = GraphTypeHome.findByPrimaryKey( nIdGraphType, plugin );
 
             if ( graphType != null )
             {
                 chart = graphType.createChart( listStatistic, entry.getTitle(  ), nGraphThreeDimension, nGraphLabelValue );
             }
 
             try
             {
                 ChartRenderingInfo info = new ChartRenderingInfo( new StandardEntityCollection(  ) );
                 BufferedImage chartImage = chart.createBufferedImage( 600, 200, info );
                 response.setContentType( "image/PNG" );
 
                 PngEncoder encoder = new PngEncoder( chartImage, false, 0, 9 );
                 response.getOutputStream(  ).write( encoder.pngEncode(  ) );
                 response.getOutputStream(  ).close(  );
             }
             catch ( Exception e )
             {
                 AppLogService.error( e );
             }
         }
     }
 }