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/*
 * Copyright 2017 - 2024 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see [https://www.gnu.org/licenses/]
 */

package infra.beans.factory.parsing;

import java.util.ArrayList;

import infra.beans.PropertyValue;
import infra.beans.PropertyValues;
import infra.beans.factory.config.BeanDefinition;
import infra.beans.factory.config.BeanDefinitionHolder;
import infra.beans.factory.config.BeanReference;
import infra.lang.Nullable;

/**
 * ComponentDefinition based on a standard BeanDefinition, exposing the given bean
 * definition as well as inner bean definitions and bean references for the given bean.
 *
 * @author Rob Harrop
 * @author Juergen Hoeller
 * @since 4.0
 */
public class BeanComponentDefinition extends BeanDefinitionHolder implements ComponentDefinition {

  private final BeanDefinition[] innerBeanDefinitions;

  private final BeanReference[] beanReferences;

  /**
   * Create a new BeanComponentDefinition for the given bean.
   *
   * @param beanDefinition the BeanDefinition
   * @param beanName the name of the bean
   */
  public BeanComponentDefinition(BeanDefinition beanDefinition, String beanName) {
    this(new BeanDefinitionHolder(beanDefinition, beanName));
  }

  /**
   * Create a new BeanComponentDefinition for the given bean.
   *
   * @param beanDefinition the BeanDefinition
   * @param beanName the name of the bean
   * @param aliases alias names for the bean, or {@code null} if none
   */
  public BeanComponentDefinition(BeanDefinition beanDefinition, String beanName, @Nullable String[] aliases) {
    this(new BeanDefinitionHolder(beanDefinition, beanName, aliases));
  }

  /**
   * Create a new BeanComponentDefinition for the given bean.
   *
   * @param beanDefinitionHolder the BeanDefinitionHolder encapsulating
   * the bean definition as well as the name of the bean
   */
  public BeanComponentDefinition(BeanDefinitionHolder beanDefinitionHolder) {
    super(beanDefinitionHolder);

    ArrayList innerBeans = new ArrayList<>();
    ArrayList references = new ArrayList<>();
    PropertyValues propertyValues = beanDefinitionHolder.getBeanDefinition().getPropertyValues();
    for (PropertyValue propertyValue : propertyValues.toArray()) {
      Object value = propertyValue.getValue();
      if (value instanceof BeanDefinitionHolder) {
        innerBeans.add(((BeanDefinitionHolder) value).getBeanDefinition());
      }
      else if (value instanceof BeanDefinition) {
        innerBeans.add((BeanDefinition) value);
      }
      else if (value instanceof BeanReference) {
        references.add((BeanReference) value);
      }
    }
    this.innerBeanDefinitions = innerBeans.toArray(new BeanDefinition[0]);
    this.beanReferences = references.toArray(new BeanReference[0]);
  }

  @Override
  public String getName() {
    return getBeanName();
  }

  @Override
  public String getDescription() {
    return getShortDescription();
  }

  @Override
  public BeanDefinition[] getBeanDefinitions() {
    return new BeanDefinition[] { getBeanDefinition() };
  }

  @Override
  public BeanDefinition[] getInnerBeanDefinitions() {
    return this.innerBeanDefinitions;
  }

  @Override
  public BeanReference[] getBeanReferences() {
    return this.beanReferences;
  }

  /**
   * This implementation returns this ComponentDefinition's description.
   *
   * @see #getDescription()
   */
  @Override
  public String toString() {
    return getDescription();
  }

  /**
   * This implementations expects the other object to be of type BeanComponentDefinition
   * as well, in addition to the superclass's equality requirements.
   */
  @Override
  public boolean equals(@Nullable Object other) {
    return (this == other || (other instanceof BeanComponentDefinition && super.equals(other)));
  }

}