/*
    * Copyright (c) 2002-2021, 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.plugins.mylutece.modules.database.authentication.service;
  
  import fr.paris.lutece.plugins.mylutece.business.attribute.AttributeHome;
  import fr.paris.lutece.plugins.mylutece.business.attribute.IAttribute;
  import fr.paris.lutece.plugins.mylutece.business.attribute.MyLuteceUserField;
  import fr.paris.lutece.plugins.mylutece.business.attribute.MyLuteceUserFieldHome;
  import fr.paris.lutece.plugins.mylutece.modules.database.authentication.business.DatabaseHome;
  import fr.paris.lutece.plugins.mylutece.modules.database.authentication.business.DatabaseUser;
  import fr.paris.lutece.plugins.mylutece.modules.database.authentication.business.DatabaseUserHome;
  import fr.paris.lutece.plugins.mylutece.service.IAnonymizationService;
  import fr.paris.lutece.plugins.mylutece.service.MyLutecePlugin;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.portal.service.plugin.PluginService;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  import fr.paris.lutece.portal.service.util.CryptoService;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  
  /**
   * Service to handle user anonymization
   *
   */
  public class DatabaseAnonymizationService implements IAnonymizationService
  {
      public static final String BEAN_DATABASE_ANONYMIZATION_SERVICE = "mylutece-database.databaseAnonymizationService";
  
      // PARAMETERS
      private static final String PARAMETER_LOGIN = "login";
      private static final String PARAMETER_EMAIL = "email";
      private static final String PARAMETER_NAME_GIVEN = "name_given";
      private static final String PARAMETER_NAME_FAMILY = "name_family";
  
      // PROPERTIES
      private static final String PROPERTY_ANONYMIZATION_ENCRYPT_ALGO = "security.anonymization.encryptAlgo";
  
      // CONSTANTS
      private static final String CONSTANT_DEFAULT_ENCRYPT_ALGO = "SHA-256";
      private Plugin _plugin = PluginService.getPlugin( DatabasePlugin.PLUGIN_NAME );
  
      /**
       * Returns the instance of the singleton
       * 
       * @return The instance of the singleton
       */
      public static DatabaseAnonymizationService getService( )
      {
          return SpringContextService.<DatabaseAnonymizationService> getBean( BEAN_DATABASE_ANONYMIZATION_SERVICE );
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void anonymizeUser( Integer nUserId, Locale locale )
      {
          DatabaseUser user = DatabaseUserHome.findByPrimaryKey( nUserId, _plugin );
  
          String strEncryptionAlgorithme = AppPropertiesService.getProperty( PROPERTY_ANONYMIZATION_ENCRYPT_ALGO, CONSTANT_DEFAULT_ENCRYPT_ALGO );
          Plugin pluginMyLutece = PluginService.getPlugin( MyLutecePlugin.PLUGIN_NAME );
          Map<String, Boolean> anonymizationStatus = AttributeHome.getAnonymizationStatusUserStaticField( pluginMyLutece );
  
          if ( Boolean.TRUE.equals( anonymizationStatus.get( PARAMETER_LOGIN ) ) )
         {
             user.setLogin( CryptoService.encrypt( user.getLogin( ), strEncryptionAlgorithme ) );
         }
 
         if ( Boolean.TRUE.equals( anonymizationStatus.get( PARAMETER_EMAIL ) ) )
         {
             user.setEmail( CryptoService.encrypt( user.getEmail( ), strEncryptionAlgorithme ) );
         }
 
         if ( Boolean.TRUE.equals( anonymizationStatus.get( PARAMETER_NAME_FAMILY ) ) )
         {
             user.setLastName( CryptoService.encrypt( user.getLastName( ), strEncryptionAlgorithme ) );
         }
 
         if ( Boolean.TRUE.equals( anonymizationStatus.get( PARAMETER_NAME_GIVEN ) ) )
         {
             user.setFirstName( CryptoService.encrypt( user.getFirstName( ), strEncryptionAlgorithme ) );
         }
 
         user.setStatus( DatabaseUser.STATUS_ANONYMIZED );
 
         DatabaseHome.removeGroupsForUser( nUserId, _plugin );
         DatabaseHome.removeRolesForUser( nUserId, _plugin );
         DatabaseUserHome.update( user, _plugin );
 
         List<IAttribute> listAllAttributes = AttributeHome.findAll( locale, pluginMyLutece );
         List<IAttribute> listAttributesText = new ArrayList<>( );
 
         for ( IAttribute attribut : listAllAttributes )
         {
             if ( attribut.isAnonymizable( ) )
             {
                 listAttributesText.add( attribut );
             }
         }
 
         for ( IAttribute attribute : listAttributesText )
         {
             List<MyLuteceUserField> listUserField = MyLuteceUserFieldHome.selectUserFieldsByIdUserIdAttribute( nUserId, attribute.getIdAttribute( ),
                     pluginMyLutece );
 
             for ( MyLuteceUserField userField : listUserField )
             {
                 userField.setValue( CryptoService.encrypt( userField.getValue( ), strEncryptionAlgorithme ) );
                 MyLuteceUserFieldHome.update( userField, pluginMyLutece );
             }
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public List<Integer> getExpiredUserIdList( )
     {
         return DatabaseUserHome.findAllExpiredUserId( _plugin );
     }
 }