/*
    * 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.plugins.workflow.modules.alertgru.web;
  
  import fr.paris.lutece.plugins.workflow.modules.alertgru.business.AlertGruTaskConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.service.AlertGruService;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.service.AlertGruTaskConfigService;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.service.IAlertGruService;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.service.ServiceConfigTaskForm;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.utils.constants.Constants;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.AgentAlertConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.BillingAccountBasedSMSAlertConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.BroadcastAlertConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.EmailAlertConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.GuichetAlertConfig;
  import fr.paris.lutece.plugins.workflow.modules.alertgru.web.alertconfig.impl.SMSAlertConfig;
  import fr.paris.lutece.plugins.workflow.service.provider.MarkerProviderService;
  import fr.paris.lutece.plugins.workflow.service.provider.ProviderManagerUtil;
  import fr.paris.lutece.plugins.workflowcore.service.config.ITaskConfigService;
  import fr.paris.lutece.plugins.workflowcore.service.provider.AbstractProviderManager;
  import fr.paris.lutece.plugins.workflowcore.service.provider.IMarkerProvider;
  import fr.paris.lutece.plugins.workflowcore.service.provider.InfoMarker;
  import fr.paris.lutece.plugins.workflowcore.service.task.ITask;
  import fr.paris.lutece.portal.service.i18n.I18nService;
  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.service.template.AppTemplateService;
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  import fr.paris.lutece.portal.util.mvc.utils.MVCMessage;
  import fr.paris.lutece.util.ErrorMessage;
  import fr.paris.lutece.util.ReferenceList;
  import fr.paris.lutece.util.html.HtmlTemplate;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import javax.servlet.http.HttpServletRequest;
  import org.apache.commons.lang3.StringUtils;
  
  public class AlertGruTaskConfigController
  {
  
      // Templates
      private static final String TEMPLATE_FIRST_STEP = "admin/plugins/workflow/modules/alertgru/task_alert_gru_config_first_step.html";
      private static final String TEMPLATE_SECOND_STEP = "admin/plugins/workflow/modules/alertgru/task_alert_gru_config_second_step.html";
  
      // Marks
      private static final String MARK_SELECT_PROVIDER = "list_provider";
      private static final String MARK_LIST_MARKER_PROVIDER = "list_marker_provider";
      private static final String MARK_LIST_ALERT_CONFIG = "list_alert_config";
      private static final String MARK_LOCALE = "locale";
      private static final String MARK_WEBAPP_URL = "webapp_url";
  
      // Services
      private static final ITaskConfigService _taskAlertGruConfigService = SpringContextService.getBean( AlertGruTaskConfigService.BEAN_SERVICE );
      private static final IAlertGruService _alertGruService = SpringContextService.getBean( AlertGruService.BEAN_SERVICE );
  
      private final ITask _task;
      private AlertGruTaskConfig _config;
  
      // Parameters
      private static final String PARAMETER_APPLY = "apply";
      private static final String PARAMETER_APPLY_MARKER = "apply_marker";
  
     // Actions
     private static final String ACTION_FIRST_STEP_SAVE = "saveFirstStep";
     private static final String ACTION_SECOND_STEP_SAVE = "saveSecondStep";
     private static final String ACTION_ADVANCED_CONFIG_SAVE = "saveAdvancedConfig";
     private static final String ACTION_ADVANCED_CONFIG_CANCEL = "cancelAdvancedConfig";
     private static final String ACTION_ALERT_CONFIG_ADD = "AddAlertConfig";
     private static final String ACTION_ALERT_CONFIG_REMOVE_PREFIX = "RemoveAlertConfig_";
     private static final String ACTION_ALERT_CONFIG_MARKERS = "loadMarkers";
 
     // Sessions
     private static final String SESSION_ID_PROVIDER = "alertProviderSession";
 
     /**
      * Constructor
      *
      * @param task
      *            the task associated to the configuration
      */
     public AlertGruTaskConfigController( ITask task )
     {
         _task = task;
 
         findConfig( );
     }
 
     /**
      * Finds the configuration
      */
     private void findConfig( )
     {
         _config = _taskAlertGruConfigService.findByPrimaryKey( _task.getId( ) );
 
         if ( _config == null )
         {
             // no config stored yet for this task, setting a empty one
             _config = new AlertGruTaskConfig( );
         }
     }
 
     /**
      * Initializes the alert configurations
      *
      * @param request
      *            the request used to initialize the configurations
      * @return the list of configurations
      */
     private List<IAlertConfig> initAlertConfigs( HttpServletRequest request )
     {
         List<IAlertConfig> listAlertConfig = new ArrayList<>( );
 
         listAlertConfig.add( new AgentAlertConfig( request, _config ) );
         listAlertConfig.add( new BroadcastAlertConfig( request, _config ) );
         listAlertConfig.add( new EmailAlertConfig( request, _config ) );
         listAlertConfig.add( new GuichetAlertConfig( request, _config ) );
         if ( _config.isBillingAccountBasedSmsNotification( ) )
         {
             listAlertConfig.add( new BillingAccountBasedSMSAlertConfig( request, _config ) );
         }
         else
         {
             listAlertConfig.add( new SMSAlertConfig( request, _config ) );
         }
 
         return listAlertConfig;
     }
 
     /**
      * Builds the view depending on the specified request and locale
      *
      * @param request
      *            the request the locale
      * @return the {@link HtmlTemplate} representing the view
      */
     public HtmlTemplate buildView( HttpServletRequest request )
     {
         HtmlTemplate template = null;
         View view = new View( request );
 
         if ( _config.getIdSpringProvider( ) == null || _config.getMarkerAlert( ) == null )
         {
             template = view.buildFirstStep( );
         }
         else
         {
             template = view.buildSecondStep( );
         }
 
         return template;
     }
 
     /**
      * Performs an action triggered by the user
      *
      * @param request
      *            the request containing the action
      * @return the URL of the error page if there is an error during the action, {@code null} otherwise
      */
     public String performAction( HttpServletRequest request )
     {
         String strErrorUrl = null;
         String strAction = findAction( request );
         Action action = new Action( request, strAction );
 
         if ( ACTION_ALERT_CONFIG_MARKERS.equals( strAction ) )
         {
             strErrorUrl = action.loadMarkers( );
         }
 
         if ( ACTION_FIRST_STEP_SAVE.equals( strAction ) )
         {
             strErrorUrl = action.saveFirstStep( );
         }
 
         if ( ACTION_SECOND_STEP_SAVE.equals( strAction ) )
         {
             strErrorUrl = action.saveSecondStep( );
         }
 
         if ( strAction.startsWith( ACTION_ALERT_CONFIG_REMOVE_PREFIX ) )
         {
             strErrorUrl = action.removeAlertConf( );
         }
 
         if ( ACTION_ALERT_CONFIG_ADD.equals( strAction ) )
         {
             strErrorUrl = action.addAlertConf( );
         }
 
         if ( ACTION_ADVANCED_CONFIG_CANCEL.equals( strAction ) )
         {
             strErrorUrl = action.cancel( );
         }
 
         if ( ACTION_ADVANCED_CONFIG_SAVE.equals( strAction ) )
         {
             strErrorUrl = action.saveAdvancedConfig( );
         }
 
         return strErrorUrl;
     }
 
     /**
      * Finds the action contained in the specified request
      *
      * @param request
      *            the request
      * @return the action
      */
     private String findAction( HttpServletRequest request )
     {
         String strAction;
         if ( !StringUtils.isBlank( request.getParameter( PARAMETER_APPLY_MARKER ) ) )
         {
             strAction = request.getParameter( PARAMETER_APPLY_MARKER );
         }
         else
         {
             strAction = request.getParameter( PARAMETER_APPLY );
         }
         if ( StringUtils.isBlank( strAction ) )
         {
             strAction = ACTION_SECOND_STEP_SAVE;
         }
 
         return strAction;
     }
 
     /**
      * This class represents a view of the task configuration
      *
      */
     private final class View
     {
         private final HttpServletRequest _request;
         private final List<IAlertConfig> _listAlertConfig;
         private final Map<String, Object> _model;
 
         /**
          * Constructor
          *
          * @param request
          *            the request used by the view
          */
         private View( HttpServletRequest request )
         {
             _request = request;
             _model = new HashMap<>( );
 
             _listAlertConfig = initAlertConfigs( request );
         }
 
         /**
          * Builds the first step of the configuration
          *
          * @return the {@link HtmlTemplate} representing the view
          */
         private HtmlTemplate buildFirstStep( )
         {
             fillModelWithConfig( );
             fillModelWithGlobalConfig( );
             if ( _config.getIdSpringProvider( ) != null )
             {
                 manageAlertGruMarkersInModel( );
             }
 
             return AppTemplateService.getTemplate( TEMPLATE_FIRST_STEP, _request.getLocale( ), _model );
         }
 
         /**
          * Builds the second step of the configuration
          *
          * @return the {@link HtmlTemplate} representing the view
          */
         private HtmlTemplate buildSecondStep( )
         {
             fillModelWithConfig( );
             fillModelWithRichTextEditorConfig( );
             fillModelWithAlertConfigs( );
             fillModelWithMailSenderName( );
             fillModelWithMailingList( );
             fillModelWithGlobalConfig( );
             manageAlertGruMarkersInModel( );
 
             return AppTemplateService.getTemplate( TEMPLATE_SECOND_STEP, _request.getLocale( ), _model );
         }
 
         /**
          * Fills the model with the task configuration
          */
         private void fillModelWithConfig( )
         {
             if ( _request.getSession( ).getAttribute( SESSION_ID_PROVIDER ) != null )
             {
                 _config.setIdSpringProvider( (String) _request.getSession( ).getAttribute( SESSION_ID_PROVIDER ) );
             }
             _model.put( Constants.MARK_CONFIG, _config );
         }
 
         /**
          * Fills the model with the configuration of the rich text editor
          */
         private void fillModelWithRichTextEditorConfig( )
         {
             _model.put( MARK_LOCALE, _request.getLocale( ) );
             _model.put( MARK_WEBAPP_URL, AppPathService.getBaseUrl( _request ) );
         }
 
         /**
          * Fills the model the alert configurations (as reference list)
          */
         private void fillModelWithAlertConfigs( )
         {
             ReferenceList listAlertConfig = ServiceConfigTaskForm.buildReferenceListOfInactiveAlertConfigs( _listAlertConfig, _request.getLocale( ) );
 
             _model.put( MARK_LIST_ALERT_CONFIG, listAlertConfig );
         }
 
         /**
          * Fills the model with the global configuration of the task
          */
         private void fillModelWithGlobalConfig( )
         {
             fillModelWithProviders( );
             fillModelWithMarkerProviders( );
             fillModelWithAlertInfos( );
         }
 
         /**
          * Fills the model with the providers
          */
         private void fillModelWithProviders( )
         {
             _model.put( MARK_SELECT_PROVIDER, ServiceConfigTaskForm.getProviderReferenceList( _task ) );
         }
 
         /**
          * Fills the model with the marker providers
          */
         private void fillModelWithMarkerProviders( )
         {
             _model.put( MARK_LIST_MARKER_PROVIDER, MarkerProviderService.getInstance( ).getMarkerProviders( ) );
         }
 
         /**
          * Fills the model with the mailing list
          */
         private void fillModelWithMailingList( )
         {
             _model.put( Constants.MARK_MAILING_LIST, _alertGruService.getMailingList( _request ) );
         }
 
         /**
          * Fills the model with the mail sender name
          */
         private void fillModelWithMailSenderName( )
         {
             String strDefaultSenderName = AppPropertiesService.getProperty( Constants.PROPERTY_NOTIFY_MAIL_DEFAULT_SENDER_NAME );
 
             _model.put( Constants.MARK_DEFAULT_SENDER_NAME, strDefaultSenderName );
         }
 
         private void fillModelWithAlertInfos( )
         {
             _model.put( Constants.MARK_STATE_LIST, _alertGruService.getListStates( _task.getAction( ).getId( ) ) );
 
         }
 
         /**
          * Manages the AlertyGru markers in the model
          */
         private void manageAlertGruMarkersInModel( )
         {
             String strIdSpringProvider = _request.getSession( ).getAttribute( SESSION_ID_PROVIDER ) != null
                     ? (String) _request.getSession( ).getAttribute( SESSION_ID_PROVIDER )
                     : _config.getIdSpringProvider( );
             String strProviderManagerId = ProviderManagerUtil.fetchProviderManagerId( strIdSpringProvider );
             String strProviderId = ProviderManagerUtil.fetchProviderId( strIdSpringProvider );
             AbstractProviderManager providerManager = ProviderManagerUtil.fetchProviderManager( strProviderManagerId );
 
             if ( providerManager != null )
             {
                 _model.put( Constants.MARK_NOTIFYGRU_MARKERS, findMarkers( providerManager, strProviderId, _config.getMarkerProviders( ) ) );
             }
             else
             {
                 List<ErrorMessage> listErrorMessages = new ArrayList<>( );
                 listErrorMessages.add( new MVCMessage( I18nService.getLocalizedString( Constants.MESSAGE_ERROR_PROVIDER_NOT_FOUND, _request.getLocale( ) ) ) );
                 _model.put( Constants.MARK_MESSAGES_ERROR, listErrorMessages );
             }
         }
 
         /**
          * Finds the AlertGru markers
          *
          * @param providerManager
          *            the provider manager
          * @param strProviderId
          *            the provider id
          * @param listMarkerProviderIds
          *            the list of marker provider ids
          * @return the AlertGru markers
          */
         private Collection<InfoMarker> findMarkers( AbstractProviderManager providerManager, String strProviderId, List<String> listMarkerProviderIds )
         {
             Collection<InfoMarker> collectionMarkers = providerManager.getProviderDescription( strProviderId ).getMarkerDescriptions( );
 
             for ( String strMarkerProviderId : listMarkerProviderIds )
             {
                 IMarkerProvider markerProvider = MarkerProviderService.getInstance( ).find( strMarkerProviderId );
 
                 if ( markerProvider != null )
                 {
                     collectionMarkers.addAll( markerProvider.provideMarkerDescriptions( ) );
                 }
             }
 
             return collectionMarkers;
         }
 
     }
 
     /**
      * This class represents an action in the task configuration
      *
      *
      *
      *
      *
      *
      */
     private final class Action
     {
         private static final String VALUE_CHECKBOX = "on";
         private static final String PARAMETER_ADDED_ALERT_CONFIG = "added_alert_config";
         private static final String PARAMETER_REMOVE_SEPARATOR = "_";
         private static final int PARAMETER_REMOVE_ALERT_CONFIG_NAME_PART = 1;
 
         private final HttpServletRequest _request;
         private final List<IAlertConfig> _listAlertConfig;
         private final AbstractProviderManager _providerManager;
         private final String _strAction;
 
         /**
          * Constructor
          *
          * @param request
          *            the request used to perform the action
          * @param strAction
          *            the action to perform
          */
         private Action( HttpServletRequest request, String strAction )
         {
             _request = request;
             _strAction = strAction;
 
             String strProviderManagerId = ProviderManagerUtil.fetchProviderManagerId( _config.getIdSpringProvider( ) );
             _providerManager = ProviderManagerUtil.fetchProviderManager( strProviderManagerId );
 
             _listAlertConfig = initAlertConfigs( request );
 
         }
 
         /**
          * Load markers from chosen provider
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String loadMarkers( )
         {
             fillConfigWithGlobalConfig( );
             putProviderInSession( );
             return null;
         }
 
         private void putProviderInSession( )
         {
             _request.getSession( ).setAttribute( SESSION_ID_PROVIDER, _request.getParameter( Constants.PARAMETER_SELECT_PROVIDER ) );
         }
 
         /**
          * Saves the first step of the task configuration
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String saveFirstStep( )
         {
             String strErrorUrl = validateGlobalConfig( );
 
             if ( !StringUtils.isEmpty( strErrorUrl ) )
             {
                 return strErrorUrl;
             }
 
             fillConfigWithGlobalConfig( );
             putProviderInSession( );
             saveConfig( );
 
             return null;
         }
 
         /**
          * Saves the second step of the task configuration
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String saveSecondStep( )
         {
             String strResult = validateSecondStepConfig( );
 
             if ( !StringUtils.isEmpty( strResult ) )
             {
                 return strResult;
             }
 
             saveAlertConfigs( );
             saveConfig( );
 
             return null;
 
         }
 
         /**
          * Saves the advanced configuration of the task
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String saveAdvancedConfig( )
         {
             String strErrorUrl = validateGlobalConfig( );
 
             if ( !StringUtils.isEmpty( strErrorUrl ) )
             {
                 return strErrorUrl;
             }
             fillConfigWithGlobalConfig( );
             fillConfigWithCrmStatus( );
             putProviderInSession( );
             saveConfig( );
             return null;
         }
 
         /**
          * Cancels the action
          *
          * @return {@code null}
          */
         private String cancel( )
         {
             _request.getSession( ).removeAttribute( SESSION_ID_PROVIDER );
             return null;
         }
 
         /**
          * Adds an alert configuration in the task
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String addAlertConf( )
         {
             String strErrorUrl = validateAlertConfigs( );
 
             if ( !StringUtils.isEmpty( strErrorUrl ) )
             {
                 return strErrorUrl;
             }
 
             String strNameOfAddedAlertConfig = findNameOfAddedAlertConfig( );
             IAlertConfig alertConfigAdded = findAlertConfigByName( strNameOfAddedAlertConfig );
 
             alertConfigAdded.setActive( true );
 
             fillConfigWithCurrentAlertConfig( alertConfigAdded );
 
             saveAlertConfigs( );
             saveConfig( );
 
             return null;
         }
 
         /**
          * Removes a alert configuration from the task
          *
          * @return the URL of the error page if there is an error during the action, {@code null} otherwise
          */
         private String removeAlertConf( )
         {
             String strNameOfRemovedAlertConfig = findNameOfRemovedAlertConfig( );
             IAlertConfig alertConfigRemoved = findAlertConfigByName( strNameOfRemovedAlertConfig );
 
             alertConfigRemoved.setActive( false );
             alertConfigRemoved.removeConfig( );
 
             saveConfig( );
 
             return null;
         }
 
         /**
          * Finds the name of the added alert configuration
          *
          * @return the name of the added alert configuration
          */
         private String findNameOfAddedAlertConfig( )
         {
             return _request.getParameter( PARAMETER_ADDED_ALERT_CONFIG );
         }
 
         /**
          * Finds the name of the removed alert configuration
          *
          * @return the name of the removed alert configuration
          */
         private String findNameOfRemovedAlertConfig( )
         {
             return _strAction.split( PARAMETER_REMOVE_SEPARATOR ) [PARAMETER_REMOVE_ALERT_CONFIG_NAME_PART];
         }
 
         /**
          * Finds a alert configuration by its name
          *
          * @param strName
          *            the name of the alert configuration to find
          * @return the found alert configuration, or {@code null} if not found
          */
         private IAlertConfig findAlertConfigByName( String strName )
         {
             IAlertConfig alertConfigFound = null;
 
             for ( IAlertConfig alertConfig : _listAlertConfig )
             {
                 if ( alertConfig.getName( ).equals( strName ) )
                 {
                     alertConfigFound = alertConfig;
                     break;
                 }
             }
 
             return alertConfigFound;
         }
 
         /**
          * Validates the global configuration of the task
          *
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateGlobalConfig( )
         {
             String errUrl;
             errUrl = validateFieldIsNotNull( Constants.PARAMETER_SUBJECT_ALERT, Constants.MESSAGE_MANDATORY_SUBJECT );
             if ( StringUtils.isEmpty( errUrl ) )
             {
                 errUrl = validateFieldIsNotNull( Constants.PARAMETER_SELECT_PROVIDER, Constants.MESSAGE_MANDATORY_PROVIDER );
                 if ( StringUtils.isEmpty( errUrl ) )
                 {
                     errUrl = validateFieldIsNotNull( Constants.PARAMETER_MARKER_ALERT, Constants.MESSAGE_MANDATORY_MARKER );
                 }
                 if ( StringUtils.isEmpty( errUrl ) )
                 {
                     errUrl = validateFieldIsNotNull( Constants.PARAMETER_ALERT_AFTER_BEFORE, Constants.MESSAGE_MANDATORY_ALERT_AFTER );
                     if ( StringUtils.isEmpty( errUrl ) )
                     {
                         errUrl = validateFieldIsNotNull( Constants.PARAMETER_STATE_AFTER, Constants.MESSAGE_MANDATORY_STATE_AFTER );
                     }
                 }
             }
             return errUrl;
         }
 
         /**
          * Validates that the field is not {@code null}
          *
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateFieldIsNotNull( String paramater, String errMessage )
         {
             String strErrorUrl = null;
 
             if ( StringUtils.isEmpty( _request.getParameter( paramater ) ) )
             {
                 strErrorUrl = buildUrlForMissingField( errMessage );
             }
 
             return strErrorUrl;
         }
 
         /**
          * Validates the second step of the task configuration
          *
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateSecondStepConfig( )
         {
             String strErrorUrl = validateOneAlertConfigIsActive( );
 
             if ( !StringUtils.isEmpty( strErrorUrl ) )
             {
                 return strErrorUrl;
             }
 
             strErrorUrl = validateAlertConfigs( );
 
             if ( !StringUtils.isEmpty( strErrorUrl ) )
             {
                 return strErrorUrl;
             }
 
             return null;
         }
 
         /**
          * Validates that at least one alert configuration is active
          *
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateOneAlertConfigIsActive( )
         {
             String strErrorUrl = null;
 
             if ( filterActiveAlertConfigs( ).isEmpty( ) )
             {
                 strErrorUrl = buildUrlForNoAlertConfig( );
             }
 
             return strErrorUrl;
         }
 
         /**
          * Validates the alert configurations
          *
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateAlertConfigs( )
         {
             return validateAlertConfigs( buildModelForValidation( ) );
         }
 
         /**
          * Validates the alert configurations with the specified model
          *
          * @param model
          *            the model
          * @return the URL of the error page if there is a validation error, {@code null} otherwise
          */
         private String validateAlertConfigs( Map<String, Object> model )
         {
             String strErrorUrl = null;
 
             for ( IAlertConfig alertConfig : filterActiveAlertConfigs( ) )
             {
                 strErrorUrl = alertConfig.getValidator( ).validate( model );
 
                 if ( !StringUtils.isEmpty( strErrorUrl ) )
                 {
                     break;
                 }
             }
 
             return strErrorUrl;
         }
 
         /**
          * Filters the active alert configurations
          *
          * @return the list of active alert configurations
          */
         private List<IAlertConfig> filterActiveAlertConfigs( )
         {
             List<IAlertConfig> listActiveAlertConfigs = new ArrayList<>( );
 
             for ( IAlertConfig alertConfig : _listAlertConfig )
             {
                 if ( alertConfig.isActive( ) )
                 {
                     listActiveAlertConfigs.add( alertConfig );
                 }
             }
 
             return listActiveAlertConfigs;
         }
 
         /**
          * Builds the URL for missing field
          *
          * @return the URL
          */
         private String buildUrlForMissingField( String errMessage )
         {
             return AdminMessageService.getMessageUrl( _request, errMessage, AdminMessage.TYPE_STOP );
         }
 
         /**
          * Builds the URL when there is no alert configuration
          *
          * @return the URL
          */
         private String buildUrlForNoAlertConfig( )
         {
             return AdminMessageService.getMessageUrl( _request, Constants.MESSAGE_MANDATORY_ONGLET, AdminMessage.TYPE_STOP );
         }
 
         /**
          * Builds the model used to validate the task
          *
          * @return the model
          */
         private Map<String, Object> buildModelForValidation( )
         {
             String strProviderId = ProviderManagerUtil.fetchProviderId( _config.getIdSpringProvider( ) );
 
             return markersToModel( _providerManager.getProviderDescription( strProviderId ).getMarkerDescriptions( ) );
         }
 
         /**
          * Converts the specified collection of AlertGru markers into a model
          *
          * @param collectionAlertMarkers
          *            the collection to convert
          * @return the model
          */
         private Map<String, Object> markersToModel( Collection<InfoMarker> collectionAlertMarkers )
         {
             Map<String, Object> model = new HashMap<>( );
 
             for ( InfoMarker alertMarker : collectionAlertMarkers )
             {
                 model.put( alertMarker.getMarker( ), alertMarker.getDescription( ) );
             }
 
             return model;
         }
 
         /**
          * Fills the configuration with the global configuration of the task
          */
         private void fillConfigWithGlobalConfig( )
         {
             fillConfigWithProvider( );
             fillConfigWithMarkerProviders( );
             fillConfigWithDemandStatus( );
             fillConfigWithAlertInfos( );
             fillConfigWithMarkerAlert( );
         }
 
         /**
          * Fills the configuration with the provider
          */
         private void fillConfigWithProvider( )
         {
             _config.setIdSpringProvider( _request.getParameter( Constants.PARAMETER_SELECT_PROVIDER ) );
         }
 
         /**
          * Fills the configuration with the marker providers
          */
         private void fillConfigWithMarkerProviders( )
         {
             String [ ] listMarkerProviders = _request.getParameterValues( Constants.PARAMETER_MARKER_PROVIDERS );
 
             if ( listMarkerProviders != null )
             {
                 _config.setMarkerProviders( Arrays.asList( listMarkerProviders ) );
             }
             else
             {
                 _config.setMarkerProviders( null );
             }
         }
 
         /**
          * Fills the configuration with the demand status
          */
         private void fillConfigWithDemandStatus( )
         {
             int nDemandStatus = ( VALUE_CHECKBOX.equals( _request.getParameter( Constants.PARAMETER_DEMAND_STATUS ) ) ) ? 1 : 0;
 
             _config.setDemandStatus( nDemandStatus );
         }
 
         /**
          * Fills the configuration with alert information
          */
         private void fillConfigWithAlertInfos( )
         {
             _config.setDaysToAlert( StringUtils.isNotBlank( _request.getParameter( Constants.PARAMETER_DAYS_TO_ALERT ) )
                     ? Integer.parseInt( _request.getParameter( Constants.PARAMETER_DAYS_TO_ALERT ) )
                     : 0 );
             _config.setAlertSubject( _request.getParameter( Constants.PARAMETER_SUBJECT_ALERT ) );
             _config.setIdStateAfter( StringUtils.isNotBlank( _request.getParameter( Constants.PARAMETER_STATE_AFTER ) )
                     ? Integer.parseInt( _request.getParameter( Constants.PARAMETER_STATE_AFTER ) )
                     : 0 );
             _config.setAlertAfterBefore( _request.getParameter( Constants.PARAMETER_ALERT_AFTER_BEFORE ) );
         }
 
         /**
          * Fills the configuration with the marker
          */
         private void fillConfigWithMarkerAlert( )
         {
             _config.setMarkerAlert( _request.getParameter( Constants.PARAMETER_MARKER_ALERT ) );
         }
 
         /**
          * Fills the configuration with the CRM status
          */
         private void fillConfigWithCrmStatus( )
         {
             String strCrmStatusId = _request.getParameter( Constants.PARAMETER_CRM_STATUS_ID );
             int nCrmStatusId = ( ( StringUtils.equals( strCrmStatusId, "1" ) ) || ( StringUtils.equals( strCrmStatusId, "0" ) ) )
                     ? Integer.parseInt( strCrmStatusId )
                     : 1;
 
             _config.setCrmStatusId( nCrmStatusId );
         }
 
         /**
          * Fills the configuration with the current alert configuration
          *
          * @param alertConfig
          *            the current alert configuration
          */
         private void fillConfigWithCurrentAlertConfig( IAlertConfig alertConfig )
         {
             int nCurrentTabIndex = ServiceConfigTaskForm.getTabIndex( alertConfig.getName( ) );
             _config.setSetOnglet( nCurrentTabIndex );
         }
 
         /**
          * Saves the alert configurations
          */
         private void saveAlertConfigs( )
         {
             for ( IAlertConfig alertConfig : filterActiveAlertConfigs( ) )
             {
                 alertConfig.addConfig( );
             }
         }
 
         /**
          * Saves the configuration of the task
          */
         private void saveConfig( )
         {
             boolean bCreate = false;
 
             if ( _config.getIdTask( ) == 0 )
             {
                 _config.setIdTask( _task.getId( ) );
                 bCreate = true;
             }
 
             if ( bCreate )
             {
                 _taskAlertGruConfigService.create( _config );
             }
             else
             {
                 _taskAlertGruConfigService.update( _config );
             }
         }
     }
 
 }