/**
    * This file Copyright (c) 2013-2015 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.fieldtype.registry;
  
  import info.magnolia.registry.RegistrationException;
  import info.magnolia.registry.RegistryMap;
  import info.magnolia.ui.form.field.definition.ConfiguredFieldDefinition;
  import info.magnolia.ui.form.field.definition.FieldDefinition;
  import info.magnolia.ui.form.fieldtype.definition.FieldTypeDefinition;
  import net.sf.cglib.proxy.Enhancer;
  
  import java.util.List;
  import java.util.Set;
  
  import javax.inject.Singleton;
  
  /**
   * FieldTypeDefinitionRegistry.
   */
  @Singleton
  public class FieldTypeDefinitionRegistry {
  
      private final RegistryMap<String, FieldTypeDefinitionProvider> registry = new RegistryMap<String, FieldTypeDefinitionProvider>() {
  
          @Override
          protected String keyFromValue(FieldTypeDefinitionProvider value) {
              return value.getId();
          }
      };
  
      public FieldTypeDefinition get(String id) throws RegistrationException {
          FieldTypeDefinitionProvider provider;
          try {
              provider = registry.getRequired(id);
          } catch (RegistrationException e) {
              throw new RegistrationException("No fieldTypeProvider registered for id: " + id, e);
          }
          return provider.getFieldTypeDefinition();
      }
  
      public FieldTypeDefinition getByDefinition(Class<? extends FieldDefinition> definitionClass) throws RegistrationException {
          // TODO hack: i18nizer proxies definition classes, so we have to unwrap them.
          while (Enhancer.isEnhanced(definitionClass)) {
              definitionClass = (Class<? extends FieldDefinition>)definitionClass.getSuperclass();
          }
          if (definitionClass.equals(ConfiguredFieldDefinition.class)) {
              // FIXME MGNLUI-829 Working around side effect of extend=override, can't do anything with ConfiguredFieldDefinition.
              return null;
          }
          // TODO end hack.
  
          for (FieldTypeDefinitionProvider provider : registry.values()) {
              if (definitionClass.equals(provider.getFieldTypeDefinition().getDefinitionClass())) {
                  return provider.getFieldTypeDefinition();
              }
          }
          throw new RegistrationException("Could not find fieldType for definition " + definitionClass.getName());
      }
  
      public void register(FieldTypeDefinitionProvider provider) {
          registry.put(provider);
      }
  
      public Set<String> unregisterAndRegister(Set<String> registeredIds, List<FieldTypeDefinitionProvider> providers) {
          return registry.removeAndPutAll(registeredIds, providers);
      }
  }