/*
    * 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.devacfr.maven.skins.reflow.snippet;
  
  import javax.annotation.Nonnull;
  import javax.annotation.Nullable;
  
  import org.devacfr.maven.skins.reflow.snippet.ComponentToken.Type;
  import org.jsoup.Jsoup;
  import org.jsoup.nodes.Document;
  import org.jsoup.nodes.Element;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * @author Christophe Friederich
   * @version 2.4
   * @param <T>
   *            type of component
   */
  public class SnippetComponent<T extends SnippetComponent<T>> extends Component<T> {
  
      /** */
      private final Type type;
  
      @Nonnull
      public static SnippetComponent<?> createSnippet(@Nonnull final Element element,
          final Component<?> parent,
          final Type type) {
          requireNonNull(element);
          return new SnippetComponent<>(element, type).addAttributes(element.attributes()).withParent(parent);
      }
  
      /**
       * @param element
       * @param type
       */
      public SnippetComponent(@Nonnull final Element element, @Nonnull final Type type) {
          super(element);
          this.type = requireNonNull(type);
      }
  
      /**
       * @return
       */
      @Nonnull
      public Type getType() {
          return type;
      }
  
      @Override
      protected SnippetComponent<?> getRootParent() {
          return this;
      }
  
      /**
       * Render the {@link SnippetComponent} between the {@code startElement} and {@code endElement} include.
       *
       * @param context
       *            the snippet context to use
       */
      public void render(final SnippetContext context) {
          try {
              final Element element = getElement();
              final String html = context.renderComponent(this);
              final Document doc = Jsoup.parse(html);
              if (doc.body().children().isEmpty()) {
                  return;
              }
              // normally, when debug trace is activated
              if (doc.body().children().size() > 1) {
                  final Element div = new Element("div");
                  doc.body().children().forEach((e) -> div.appendChild(e));
                  element.replaceWith(div);
              } else {
                  final Element el = doc.body().children().first();
                  // if snippet contains rendered snippet.
                  if (ComponentResolver.hasIncludedSnippetComponent(el)) {
                      final SnippetParser parser = context.createChildParser();
                      final Document childDoc = parser.parse(context.getConfig(), el.outerHtml()).document();
                      element.replaceWith(childDoc.body().children().first());
                  } else {
                      element.replaceWith(el);
                 }
             }
         } catch (final Exception e) {
             throw new RuntimeException(e.getMessage(), e);
         }
     }
 }