/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.myfaces.cdi.managedproperty;
  
  import java.lang.reflect.ParameterizedType;
  import javax.enterprise.context.Dependent;
  import javax.enterprise.context.spi.CreationalContext;
  import javax.enterprise.inject.spi.BeanManager;
  import javax.enterprise.util.AnnotationLiteral;
  import javax.faces.FacesException;
  import javax.faces.annotation.ManagedProperty;
  import javax.faces.context.FacesContext;
  import org.apache.myfaces.cdi.util.AbstractDynamicProducer;
  import org.apache.myfaces.shared.util.ClassUtils;
  
  /**
   *
   */
  public class ManagedPropertyProducer extends AbstractDynamicProducer<Object>
  {
      class ManagedPropertyAnnotationLiteral extends AnnotationLiteral<ManagedProperty> implements ManagedProperty
      {
          private static final long serialVersionUID = 1L;
          
          private String value;
  
          public ManagedPropertyAnnotationLiteral(String value)
          {
              this.value = value;
          }
  
          @Override
          public String value()
          {
              return value;
          }
      }
      
      public ManagedPropertyProducer(BeanManager beanManager, ManagedPropertyInfo typeInfo)
      {
          super(beanManager);
          
          Class<?> beanClass;
          // Need to check for ParameterizedType to support types such as List<String>
          if (typeInfo.getType() instanceof ParameterizedType) 
          {
              beanClass = ClassUtils.simpleClassForName(
                      ((ParameterizedType) typeInfo.getType()).getRawType().getTypeName());
          }
          else 
          {
              // need to use simpleJavaTypeToClass to support Arrays and primitive types
              beanClass = ClassUtils.simpleJavaTypeToClass(typeInfo.getType().getTypeName());
          }
  
          super.id(typeInfo.getType() + "_" + typeInfo.getExpression())
                  .scope(Dependent.class)
                  .qualifiers(new ManagedPropertyAnnotationLiteral(typeInfo.getExpression()))
                  .types(typeInfo.getType(), Object.class)
                  .beanClass(beanClass)
                  .create(e -> createManagedProperty(e, typeInfo));
      }
  
      protected Object createManagedProperty(CreationalContext<Object> cc, ManagedPropertyInfo typeInfo)
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          if (facesContext == null)
          {
              throw new FacesException("@ManagedProperty(\"" + typeInfo.getExpression()
                      + "\") can only be resolved in a JSF request!");
          }
          
          return facesContext.getApplication().evaluateExpressionGet(
                  facesContext, typeInfo.getExpression(), getBeanClass());
      }
  }