/**
    * This file Copyright (c) 2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.form.definition;
  
  import info.magnolia.ui.field.ConfiguredFieldDefinition;
  import info.magnolia.ui.form.ConfiguredFormDefinition;
  import info.magnolia.ui.field.ConfiguredNamedFieldDefinition;
  import info.magnolia.ui.field.FieldDefinition;
  import info.magnolia.ui.form.FormDefinition;
  import info.magnolia.ui.field.NamedFieldDefinition;
  import info.magnolia.ui.field.TextFieldDefinition;
  import info.magnolia.ui.framework.databinding.layout.ConfiguredTabDefinition;
  import info.magnolia.ui.framework.databinding.layout.TabDefinition;
  import info.magnolia.ui.framework.databinding.layout.TabbedLayoutDefinition;
  
  import java.util.List;
  import java.util.stream.Collectors;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import net.sf.cglib.proxy.Enhancer;
  
  /**
   * Functional interface for definition converters.
   *
   * @param <OLD> - old definition class
   * @param <NEW> - new definition class
   */
  @FunctionalInterface
  public interface DefinitionConverter<OLD, NEW> {
  
      NEW convert(OLD definition);
  
      DefinitionConverter<info.magnolia.ui.form.field.definition.FieldDefinition, NamedFieldDefinition> NAMED = (oldDefinition) -> {
          ConfiguredNamedFieldDefinition namedDefinition = new ConfiguredNamedFieldDefinition();
          namedDefinition.setName(oldDefinition.getName());
          return namedDefinition;
      };
  
      DefinitionConverter<info.magnolia.ui.form.definition.TabDefinition, TabDefinition> TAB = (oldDefinition) -> {
          info.magnolia.ui.framework.databinding.layout.ConfiguredTabDefinition newDefinition = new ConfiguredTabDefinition();
          newDefinition.setLabel(oldDefinition.getLabel());
          newDefinition.setName(oldDefinition.getName());
          newDefinition.setFields(oldDefinition.getFields().stream().map(NAMED::convert).collect(Collectors.toList()));
          return newDefinition;
      };
  
      DefinitionConverter<info.magnolia.ui.form.field.definition.FieldDefinition, FieldDefinition<?>> FIELD = (oldDefinition) -> {
          final Logger log = LoggerFactory.getLogger(DefinitionConverter.class);
  
          Class oldDefinitionClass = Enhancer.isEnhanced(oldDefinition.getClass()) ? oldDefinition.getClass().getSuperclass() : oldDefinition.getClass();
          ConfiguredFieldDefinition newDefinition;
          try {
              newDefinition = (ConfiguredFieldDefinition) Class.forName("info.magnolia.ui.field." + oldDefinitionClass.getSimpleName()).newInstance();
          } catch (ReflectiveOperationException e) {
              log.error("No replacement for old {}. Falling back to {}", oldDefinitionClass, TextFieldDefinition.class, e);
              newDefinition = new TextFieldDefinition();
          }
          newDefinition.setDefaultValue(oldDefinition.getDefaultValue());
          newDefinition.setDescription(oldDefinition.getDescription());
          newDefinition.setI18n(oldDefinition.isI18n());
          newDefinition.setLabel(oldDefinition.getLabel());
          newDefinition.setName(oldDefinition.getName());
          newDefinition.setReadOnly(oldDefinition.isReadOnly());
          newDefinition.setRequired(oldDefinition.isRequired());
          newDefinition.setRequiredErrorMessage(oldDefinition.getRequiredErrorMessage());
          newDefinition.setStyleName(oldDefinition.getStyleName());
         newDefinition.setValidators(oldDefinition.getValidators());
         if (oldDefinition.getConverterClass() != null) {
             log.error("Converter are not supported for task detail view. No converter will be set for field {}", oldDefinition.getConverterClass(), oldDefinition.getName());
         }
         return newDefinition;
     };
 
     DefinitionConverter<info.magnolia.ui.form.definition.FormDefinition, FormDefinition> FORM = (oldDefinition) -> {
         TabbedLayoutDefinition tabbedLayoutDefinition = new TabbedLayoutDefinition();
         tabbedLayoutDefinition.setTabs(oldDefinition.getTabs().stream().map(TAB::convert).collect(Collectors.toList()));
         ConfiguredFormDefinition<?> newDefinition = new ConfiguredFormDefinition<>();
         newDefinition.setName(oldDefinition.getLabel());
         newDefinition.setLayout(tabbedLayoutDefinition);
         //newDefinition.setImplementationClass();
         newDefinition.setProperties(oldDefinition
                 .getTabs()
                 .stream()
                 .map(info.magnolia.ui.form.definition.TabDefinition::getFields)
                 .flatMap(List::stream)
                 .map(FIELD::convert)
                 .collect(Collectors.toList()));
         return newDefinition;
     };
 }