/*
    * 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.portal.service.user.attribute;
  
  import fr.paris.lutece.portal.business.user.AdminUser;
  import fr.paris.lutece.portal.business.user.attribute.AdminUserField;
  import fr.paris.lutece.portal.business.user.attribute.AdminUserFieldFilter;
  import fr.paris.lutece.portal.business.user.attribute.AdminUserFieldHome;
  import fr.paris.lutece.portal.business.user.attribute.IAttribute;
  import fr.paris.lutece.portal.service.message.AdminMessage;
  import fr.paris.lutece.portal.service.message.AdminMessageService;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.web.constants.Messages;
  import fr.paris.lutece.portal.web.upload.MultipartHttpServletRequest;
  
  import org.apache.commons.fileupload.FileItem;
  import org.apache.commons.lang.StringUtils;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  
  import javax.servlet.http.HttpServletRequest;
  
  
  /**
   *
   * AdminUserFieldService
   *
   */
  public final class AdminUserFieldService
  {
      // CONSTANTS
      private static final String CONSTANT_EMPTY_STRING = "";
      private static final String CONSTANT_UNDERSCORE = "_";
  
      // PARAMETERS
      private static final String PARAMETER_ATTRIBUTE = "attribute";
      private static final String PARAMETER_UPDATE_ATTRIBUTE = "update_attribute";
      private static final AttributeService _attributeService = AttributeService.getInstance(  );
  
      /**
       * Instantiates a new admin user field service.
       */
      private AdminUserFieldService(  )
      {
      }
  
      /**
       * Check if the user fields are correctly filled
       * @param request HttpServletRequest
       * @param locale locale
       * @return null if there are no problem
       */
      public static String checkUserFields( HttpServletRequest request, Locale locale )
      {
          // Specific attributes
          List<IAttribute> listAttributes = _attributeService.getAllAttributesWithoutFields( locale );
  
          for ( IAttribute attribute : listAttributes )
          {
              if ( attribute.isAttributeImage(  ) )
              {
                  MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
                  FileItem fileItem = multipartRequest.getFile( PARAMETER_ATTRIBUTE + CONSTANT_UNDERSCORE +
                          attribute.getIdAttribute(  ) );
                  String strUpdateAttribute = request.getParameter( PARAMETER_UPDATE_ATTRIBUTE + CONSTANT_UNDERSCORE +
                         attribute.getIdAttribute(  ) );
 
                 if ( attribute.isMandatory(  ) && ( strUpdateAttribute != null ) &&
                         ( ( fileItem == null ) || ( fileItem.getSize(  ) == 0 ) ) )
                 {
                     return AdminMessageService.getMessageUrl( request, Messages.MANDATORY_FIELDS, AdminMessage.TYPE_STOP );
                 }
             }
             else
             {
                 String value = request.getParameter( PARAMETER_ATTRIBUTE + CONSTANT_UNDERSCORE +
                         attribute.getIdAttribute(  ) );
 
                 if ( attribute.isMandatory(  ) && ( ( value == null ) || value.equals( CONSTANT_EMPTY_STRING ) ) )
                 {
                     return AdminMessageService.getMessageUrl( request, Messages.MANDATORY_FIELDS, AdminMessage.TYPE_STOP );
                 }
             }
         }
 
         return null;
     }
 
     /**
      * Create the user fields
      * @param user Adminuser
      * @param request HttpServletRequest
      * @param locale locale
      */
     public static void doCreateUserFields( AdminUser user, HttpServletRequest request, Locale locale )
     {
         // Attributes created in the Back-Office
         List<IAttribute> listAttributes = _attributeService.getCoreAttributesWithoutFields( locale );
 
         for ( IAttribute attribute : listAttributes )
         {
             List<AdminUserField> listUserFields = attribute.getUserFieldsData( request, user );
 
             for ( AdminUserField userField : listUserFields )
             {
                 if ( userField != null )
                 {
                     AdminUserFieldHome.create( userField );
                 }
             }
         }
 
         // Attributes associated to the plugins
         for ( AdminUserFieldListenerService adminUserFieldListenerService : SpringContextService.getBeansOfType( 
                 AdminUserFieldListenerService.class ) )
         {
             adminUserFieldListenerService.doCreateUserFields( user, request, locale );
         }
     }
 
     /**
      * Modify the user fields
      * @param user AdminUser
      * @param request HttpServletRequest
      * @param locale locale
      * @param currentUser current user
      */
     public static void doModifyUserFields( AdminUser user, HttpServletRequest request, Locale locale,
         AdminUser currentUser )
     {
         // Attributes created in the Back-Office
         List<IAttribute> listAttributes = _attributeService.getCoreAttributesWithoutFields( locale );
         Map<Integer, List<AdminUserField>> map = new HashMap<Integer, List<AdminUserField>>(  );
 
         for ( IAttribute attribute : listAttributes )
         {
             List<AdminUserField> listUserFields = attribute.getUserFieldsData( request, user );
 
             map.put( attribute.getIdAttribute(  ), listUserFields );
         }
 
         // Remove all user fields
         AdminUserFieldFilter auFieldFilter = new AdminUserFieldFilter(  );
         auFieldFilter.setIdUser( user.getUserId(  ) );
         AdminUserFieldHome.removeByFilter( auFieldFilter );
 
         for ( int nIdAttribute : map.keySet(  ) )
         {
             for ( AdminUserField userField : map.get( nIdAttribute ) )
             {
                 if ( userField != null )
                 {
                     AdminUserFieldHome.create( userField );
                 }
             }
         }
 
         // Attributes associated to the plugins
         for ( AdminUserFieldListenerService adminUserFieldListenerService : SpringContextService.getBeansOfType( 
                 AdminUserFieldListenerService.class ) )
         {
             adminUserFieldListenerService.doModifyUserFields( user, request, locale, currentUser );
         }
     }
 
     /**
      * Remove the user fields
      * @param user Adminuser
      * @param request HttpServletRequest
      * @param locale locale
      */
     public static void doRemoveUserFields( AdminUser user, HttpServletRequest request, Locale locale )
     {
         AdminUserFieldFilter auFieldFilter = new AdminUserFieldFilter(  );
         auFieldFilter.setIdUser( user.getUserId(  ) );
         AdminUserFieldHome.removeByFilter( auFieldFilter );
 
         // Attributes associated to the plugins
         for ( AdminUserFieldListenerService adminUserFieldListenerService : SpringContextService.getBeansOfType( 
                 AdminUserFieldListenerService.class ) )
         {
             adminUserFieldListenerService.doRemoveUserFields( user, request, locale );
         }
     }
 
     /**
      * Remove the user fields from a given ID attribute
      * @param nIdAttribute the ID attribute
      */
     public static void doRemoveUserFieldsByIdAttribute( int nIdAttribute )
     {
         AdminUserFieldFilter auFieldFilter = new AdminUserFieldFilter(  );
         auFieldFilter.setIdAttribute( nIdAttribute );
         AdminUserFieldHome.removeByFilter( auFieldFilter );
     }
 
     /**
      * Remove the user fields from a given ID attribute field
      * @param nIdAttributeField the attribute field ID
      */
     public static void doRemoveUserFieldsByIdField( int nIdAttributeField )
     {
         AdminUserFieldHome.removeUserFieldsFromIdField( nIdAttributeField );
     }
 
     /**
      * Get the user attribute fields
      * @param nUserId the user ID
      * @param locale the {@link Locale}
      * @return a Map of (ID Attribute, Object). The object could be either a File or a list of {@link AdminUserField}
      */
     public static Map<String, Object> getAdminUserFields( int nUserId, Locale locale )
     {
         List<IAttribute> listAttributes = _attributeService.getAllAttributesWithFields( locale );
 
         return getAdminUserFields( listAttributes, nUserId, locale );
     }
 
     /**
      * Get the user attribute fields
      * @param listAttributes the list of attributes
      * @param nUserId the user ID
      * @param locale the {@link Locale}
      * @return a Map of (ID Attribute, Object). The object could be either a File or a list of {@link AdminUserField}
      */
     public static Map<String, Object> getAdminUserFields( List<IAttribute> listAttributes, int nUserId, Locale locale )
     {
         Map<String, Object> map = new HashMap<String, Object>(  );
 
         for ( IAttribute attribute : listAttributes )
         {
             List<AdminUserField> listUserFields = AdminUserFieldHome.selectUserFieldsByIdUserIdAttribute( nUserId,
                     attribute.getIdAttribute(  ) );
 
             if ( attribute.isAttributeImage(  ) )
             {
                 if ( listUserFields.size(  ) > 0 )
                 {
                     AdminUserField userField = listUserFields.get( 0 );
 
                     if ( userField.getFile(  ) != null )
                     {
                         map.put( String.valueOf( attribute.getIdAttribute(  ) ), userField.getFile(  ) );
                     }
                 }
             }
             else
             {
                 if ( listUserFields.size(  ) == 0 )
                 {
                     AdminUserField userField = new AdminUserField(  );
                     userField.setValue( StringUtils.EMPTY );
                     listUserFields.add( userField );
                 }
 
                 map.put( String.valueOf( attribute.getIdAttribute(  ) ), listUserFields );
             }
         }
 
         return map;
     }
 
     /**
      * Get the admin user field from a given attribute and a given user ID
      * @param attribute a {@link IAttribute}
      * @param nUserId the user ID
      * @param locale the {@link Locale}
      * @return either a File (if the attribute is a type img) or a list of {@link AdminUserField}
      */
     public Object getAdminUserField( IAttribute attribute, int nUserId, Locale locale )
     {
         List<AdminUserField> listUserFields = AdminUserFieldHome.selectUserFieldsByIdUserIdAttribute( nUserId,
                 attribute.getIdAttribute(  ) );
 
         if ( attribute.isAttributeImage(  ) )
         {
             if ( listUserFields.size(  ) > 0 )
             {
                 AdminUserField userField = listUserFields.get( 0 );
 
                 if ( userField.getFile(  ) != null )
                 {
                     return userField.getFile(  );
                 }
             }
         }
         else
         {
             if ( listUserFields.size(  ) == 0 )
             {
                 AdminUserField userField = new AdminUserField(  );
                 userField.setValue( StringUtils.EMPTY );
                 listUserFields.add( userField );
             }
 
             return listUserFields;
         }
 
         return null;
     }
 }