/*
    * 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.adminauthenticationwsso.service;
  
  import java.io.File;
  import java.io.FileWriter;
  import java.io.IOException;
  import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  import java.util.Collection;
  import java.util.Date;
  import java.util.HashMap;
  
  import fr.paris.lutece.portal.business.user.AdminUser;
  import fr.paris.lutece.portal.business.user.AdminUserFilter;
  import fr.paris.lutece.portal.business.user.AdminUserHome;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  import fr.paris.lutece.util.xml.XmlUtil;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  
  /**
   *
   * @author lutecer
   */
  public class WssoAdminUsersFileGeneratorService
  {
      /////////////////////////////////////////////////////////////////////////////////
      // Constants
      private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
  
      /////////////////////////////////////////////////////////////////////////////////
      // Properties
      private static final String PROPERTY_APP_ID = "adminauthenticationwsso.appID";
      private static final String PROPERTY_APP_RESPONSABLE = "adminauthenticationwsso.appResponsable";
      private static final String PROPERTY_XML_STORAGE_FOLDER_PATH = "adminauthenticationwsso.path";
      private static final String PROPERTY_XML_FILE_NAME = "adminauthenticationwsso.fileName";
      private static final String PROPERTY_XMLFILEFORMAT_AUTORISATION_WSSO = "adminauthenticationwsso.wssofileformat.tag_autorisationWSSO";
      private static final String PROPERTY_XMLFILEFORMAT_APPLICATION_WSSO = "adminauthenticationwsso.wssofileformat.tag_applicationWSSO";
      private static final String PROPERTY_XMLFILEFORMAT_ATTR_APPLICATION_WSSO_APP_ID = "adminauthenticationwsso.wssofileformat.tag_appID";
      private static final String PROPERTY_XMLFILEFORMAT_TRANSMISSION_DATE = "adminauthenticationwsso.wssofileformat.tag_transmissionDate";
      private static final String PROPERTY_XMLFILEFORMAT_ATTR_TRANSMISSION_DATE_DATE = "adminauthenticationwsso.wssofileformat.tag_date";
      private static final String PROPERTY_XMLFILEFORMAT_APP_RESPONSABLE = "adminauthenticationwsso.wssofileformat.tag_appResponsable";
      private static final String PROPERTY_XMLFILEFORMAT_ATTR_APP_RESPONSABLE_MAIL = "adminauthenticationwsso.wssofileformat.tag_mail";
      private static final String PROPERTY_XMLFILEFORMAT_ALLOWED_USER = "adminauthenticationwsso.wssofileformat.tag_allowedUser";
      private static final String PROPERTY_XMLFILEFORMAT_ATTR_ALLOWED_USER_WSSO_GUID = "adminauthenticationwsso.wssofileformat.tag_wssoGUID";
      private static final String LOG_MESSAGE_OK = "\nWssoAdminUserFileGeneratorService : Update OK for file ";
      private static final String LOG_MESSAGE_NOK = "\nWssoAdminUserFileGeneratorService : Error when updating file ";
      
      //Regex
      private static final String REGEX_WSSO_ID = AppPropertiesService.getProperty( "adminauthenticationwsso.wssoid.regex" );
      
      /**
       *
       * Creates a new instance of WssoAdminUsersFileGeneratorService
       */
      public WssoAdminUsersFileGeneratorService(  )
      {
      }
  
      /**
       * Creates the XML string
       *
       * @param plugin the plugin
      * @return String the XML content of the admin user list
      */
     public static String getXml( Plugin plugin )
     {
         StringBuffer strXml = new StringBuffer(  );
         Date date = new Date(  );
         HashMap attrList = new HashMap(  );
         // get only active users to export to wsso
         AdminUserFilter auFilter = new AdminUserFilter();
 		auFilter.init();
 		auFilter.setStatus(AdminUser.ACTIVE_CODE);
 		Collection<AdminUser> userList = AdminUserHome.findUserByFilter(auFilter);
 		//AdminAuthentication auth = new AdminWssoAuthentication(  );
         //Collection<AdminWssoUser> userList = auth.getUserList( "", "", "" );
 
         //Open AutorisationWsso
         XmlUtil.beginElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_AUTORISATION_WSSO ) );
 
         //Open ApplicationWsso
         attrList.put( AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_ATTR_APPLICATION_WSSO_APP_ID ),
             AppPropertiesService.getProperty( PROPERTY_APP_ID ) );
         XmlUtil.beginElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_APPLICATION_WSSO ),
             attrList );
         attrList.clear(  );
 
         //Add transmissionDate
         DateFormat dateFormat = new SimpleDateFormat( DATE_FORMAT );
         attrList.put( AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_ATTR_TRANSMISSION_DATE_DATE ),
             dateFormat.format( date ) );
         XmlUtil.addEmptyElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_TRANSMISSION_DATE ),
             attrList );
         attrList.clear(  );
 
         //Add responsable
         attrList.put( AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_ATTR_APP_RESPONSABLE_MAIL ),
             AppPropertiesService.getProperty( PROPERTY_APP_RESPONSABLE ) );
         XmlUtil.addEmptyElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_APP_RESPONSABLE ),
             attrList );
         attrList.clear(  );
 
         //Add list of allowedUser
         Pattern pattern = Pattern.compile( REGEX_WSSO_ID );
         for ( AdminUser user : userList )
         {
             Matcher matcher = pattern.matcher( user.getAccessCode( ) );
             if ( matcher.matches( ) )
             {
                 attrList.put( AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_ATTR_ALLOWED_USER_WSSO_GUID ),
                 user.getAccessCode(  ) );
                 XmlUtil.addEmptyElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_ALLOWED_USER ),
                 attrList );
                 attrList.clear(  );
             }
         }
 
         //Close applicationWsso
         XmlUtil.endElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_APPLICATION_WSSO ) );
 
         //Close autorisationWsso
         XmlUtil.endElement( strXml, AppPropertiesService.getProperty( PROPERTY_XMLFILEFORMAT_AUTORISATION_WSSO ) );
 
         return strXml.toString(  );
     }
 
     /**
      * Create or update the XML file with the getXml content
      *
      * @param plugin the plugin
      */           
     public static String createXmlFile( Plugin plugin )
     {
         FileWriter fileXmlWriter = null;
 
         //String buffer for building the response page
         StringBuffer sbLogs = new StringBuffer(  );
         String strFileName = AppPropertiesService.getProperty( PROPERTY_XML_FILE_NAME );
         String strFolderPath = AppPathService.getPath( PROPERTY_XML_STORAGE_FOLDER_PATH, "" );
 
         try
         {
             // Test if the pushXml directory exist and create it if it doesn't exist
             if ( !new File( strFolderPath ).exists(  ) )
             {
                 File fileFolder = new File( strFolderPath );
                 fileFolder.mkdir(  );
             }
 
             // Creates a temporary XML file
             File fileXml = new File( strFolderPath + strFileName );
             File fileXmlDirectory = new File( strFolderPath );
             File fileXmlTemp = File.createTempFile( "tmp", null, fileXmlDirectory );
             fileXmlWriter = new FileWriter( fileXmlTemp );
             fileXmlWriter.write( getXml( plugin ) );
             fileXmlWriter.flush(  );
             fileXmlWriter.close(  );
 
             // Deletes the file if the file exists and renames the temporary file into the file
             removeXmlFile(  );
             fileXmlTemp.renameTo( fileXml );
             sbLogs.append( LOG_MESSAGE_OK + strFileName );
         }
         catch ( IOException e )
         {
             AppLogService.error( e.getMessage(  ), e );
             sbLogs.append( LOG_MESSAGE_NOK + strFileName );
         }
         catch ( NullPointerException e )
         {
             AppLogService.error( e.getMessage(  ), e );
             sbLogs.append( LOG_MESSAGE_NOK + strFileName );
         }
 
         return sbLogs.toString(  );
     }
 
     /**
      * Delete the XML file on the file system
      *
      */
     public static void removeXmlFile(  )
     {
         String strFileXml = AppPathService.getPath( PROPERTY_XML_STORAGE_FOLDER_PATH, "" ) +
             AppPropertiesService.getProperty( PROPERTY_XML_FILE_NAME );
         File file = new File( strFileXml );
 
         // Deletes the file if the file exists
         if ( file.exists(  ) )
         {
             file.delete(  );
         }
     }
 }