/*
    * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package de.smartics.properties.integration.cdi.extension;
  
  import java.io.Serializable;
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Type;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.enterprise.context.RequestScoped;
  import javax.enterprise.context.spi.CreationalContext;
  import javax.enterprise.inject.spi.Bean;
  import javax.enterprise.inject.spi.BeanManager;
  import javax.enterprise.inject.spi.InjectionPoint;
  import javax.enterprise.util.AnnotationLiteral;
  
  import de.smartics.properties.api.config.app.ConfigurationPropertiesFactory;
  import de.smartics.properties.api.config.domain.ConfigurationPropertiesManagement;
  import de.smartics.properties.api.config.domain.key.ConfigurationKey;
  import de.smartics.properties.integration.cdi.DefaultManagement;
  import de.smartics.properties.integration.cdi.Management;
  import de.smartics.properties.spi.config.domain.key.ConfigurationKeyContext;
  import de.smartics.properties.spi.config.domain.key.ConfigurationKeyContextManager;
  
  /**
   * Cdi {@link Bean} implementation for the property descriptor types.
   */
  public class ConfigurationPropertiesCdiBean implements Bean<Object>,
      Serializable
  {
  
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    /**
     * The class version identifier.
     */
    private static final long serialVersionUID = 1L;
  
    /**
     * The configuration properties class.
     */
    private final Class<?> type;
  
    /**
     * The cdi bean manager.
     */
    private final BeanManager beanManager;
  
    /**
     * The factory that stores all configurations.
     */
    private final ConfigurationPropertiesFactory factory;
  
    /**
     * Marker to define which key shall be used a static key or the full dynamic
     * key.
     */
    private final boolean useOnlyStaticKeyParts;
  
    // --- members --------------------------------------------------------------
  
    // ****************************** Initializer *******************************
  
    // ****************************** Constructors ******************************
  
    /**
     * Constructor.
     *
     * @param type the type which shall be constructed.
     * @param beanManager the cdi bean manager.
     * @param factory the factory to construct configurationProperties or
     *          managements.
     * @param useOnlyStaticKeyParts trigger to use only the static key parts of aa
     *          key.
     */
    public ConfigurationPropertiesCdiBean(final Class<?> type,
        final BeanManager beanManager,
        final ConfigurationPropertiesFactory factory,
        final boolean useOnlyStaticKeyParts)
    {
      this.type = type;
      this.beanManager = beanManager;
     this.factory = factory;
     this.useOnlyStaticKeyParts = useOnlyStaticKeyParts;
   }
 
   // ****************************** Inner Classes *****************************
 
   // ********************************* Methods ********************************
 
   // --- init -----------------------------------------------------------------
 
   // --- get&set --------------------------------------------------------------
 
   // --- business -------------------------------------------------------------
 
   @Override
   public Class<?> getBeanClass()
   {
     return type;
   }
 
   @Override
   public Set<InjectionPoint> getInjectionPoints()
   {
     return Collections.emptySet();
   }
 
   @Override
   public String getName()
   {
     final StringBuilder beanName = new StringBuilder();
     if (useOnlyStaticKeyParts)
     {
       beanName.append("Default");
     }
     beanName.append(type.getName());
     return beanName.toString();
   }
 
   @SuppressWarnings("serial")
   @Override
   public Set<Annotation> getQualifiers()
   {
     final Set<Annotation> qualifiers = new HashSet<Annotation>();
     if (useOnlyStaticKeyParts)
     {
       qualifiers.add(new AnnotationLiteral<DefaultManagement>()
       {
       });
     }
     else
     {
       qualifiers.add(new AnnotationLiteral<Management>()
       {
       });
     }
     return qualifiers;
   }
 
   @Override
   public Class<? extends Annotation> getScope()
   {
     return RequestScoped.class;
   }
 
   @Override
   public Set<Class<? extends Annotation>> getStereotypes()
   {
     return Collections.emptySet();
   }
 
   @Override
   public Set<Type> getTypes()
   {
     final Set<Type> types = new HashSet<Type>();
     types.add(type);
     return types;
   }
 
   @Override
   public boolean isAlternative()
   {
     return false;
   }
 
   @Override
   public boolean isNullable()
   {
     return false;
   }
 
   @Override
   public Object create(final CreationalContext<Object> ctx)
   {
     final ConfigurationKey<?> actualKey =
         CdiBeanHelper.find(beanManager, ConfigurationKey.class).get(0);
     final ConfigurationKey<?> keyToUse;
     if (useOnlyStaticKeyParts)
     {
       final ConfigurationKeyContext context =
           ConfigurationKeyContextManager.INSTANCE.context();
       final de.smartics.properties.api.config.domain.key.ConfigurationKeyFactory<?> ckfactory =
           context.configurationKeyFactory();
       final ConfigurationKey<?> defaultKey =
           ckfactory.createStaticKey(actualKey);
       keyToUse = defaultKey;
     }
     else
     {
       keyToUse = actualKey;
     }
     final ConfigurationPropertiesManagement configuration =
         factory.createManagement(keyToUse);
     // configuration.validate(false);
     return configuration;
   }
 
   @Override
   public void destroy(final Object instance, final CreationalContext<Object> ctx)
   {
 
   }
   // --- object basics --------------------------------------------------------
 
 }