/*
    * html-crawler is a library to help crawling websites.
    * Copyright (C) 2020  Uwe Plonus
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  package org.sw4j.tool.html.crawler;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.StringWriter;
  import java.util.LinkedList;
  import java.util.List;
  import org.jsoup.Jsoup;
  import org.jsoup.nodes.Attributes;
  import org.jsoup.nodes.Document;
  import org.jsoup.nodes.Element;
  
  public class SinglePageCrawler {
  
      private final List<ExternalReferenceListener> aListener;
  
      private final List<ExternalReferenceListener> areaListener;
  
      private final List<ExternalReferenceListener> audioListener;
  
      private final List<ExternalReferenceListener> baseListener;
  
      private final List<ExternalReferenceListener> blockquoteListener;
  
      private final List<ExternalReferenceListener> buttonListener;
  
      private final List<ExternalReferenceListener> delListener;
  
      private final List<ExternalReferenceListener> embedListener;
  
      private final List<ExternalReferenceListener> formListener;
  
      private final List<ExternalReferenceListener> iframeListener;
  
      private final List<ExternalReferenceListener> imgListener;
  
      private final List<ExternalReferenceListener> inputListener;
  
      private final List<ExternalReferenceListener> insListener;
  
      private final List<ExternalReferenceListener> itemListener;
  
      private final List<ExternalReferenceListener> linkListener;
  
      private final List<ExternalReferenceListener> manifestListener;
  
      private final List<ExternalReferenceListener> objectListener;
  
      private final List<ExternalReferenceListener> qListener;
  
      private final List<ExternalReferenceListener> scriptListener;
  
      private final List<ExternalReferenceListener> sourceListener;
  
      private final List<ExternalReferenceListener> trackListener;
  
      private final List<ExternalReferenceListener> videoListener;
  
      private SinglePageCrawler(final List<ExternalReferenceListener> aListener,
              final List<ExternalReferenceListener> areaListener,
              final List<ExternalReferenceListener> audioListener,
              final List<ExternalReferenceListener> baseListener,
              final List<ExternalReferenceListener> blockquoteListener,
              final List<ExternalReferenceListener> buttonListener,
              final List<ExternalReferenceListener> embedListener,
              final List<ExternalReferenceListener> delListener,
              final List<ExternalReferenceListener> formListener,
              final List<ExternalReferenceListener> iframeListener,
              final List<ExternalReferenceListener> imgListener,
              final List<ExternalReferenceListener> inputListener,
              final List<ExternalReferenceListener> insListener,
              final List<ExternalReferenceListener> itemListener,
              final List<ExternalReferenceListener> linkListener,
              final List<ExternalReferenceListener> manifestListener,
              final List<ExternalReferenceListener> objectListener,
              final List<ExternalReferenceListener> qListener,
              final List<ExternalReferenceListener> scriptListener,
              final List<ExternalReferenceListener> sourceListener,
              final List<ExternalReferenceListener> trackListener,
              final List<ExternalReferenceListener> videoListener) {
          this.aListener = aListener;
         this.areaListener = areaListener;
         this.audioListener = audioListener;
         this.baseListener = baseListener;
         this.blockquoteListener = blockquoteListener;
         this.buttonListener = buttonListener;
         this.delListener = delListener;
         this.embedListener = embedListener;
         this.formListener = formListener;
         this.iframeListener = iframeListener;
         this.imgListener = imgListener;
         this.inputListener = inputListener;
         this.insListener = insListener;
         this.itemListener = itemListener;
         this.linkListener = linkListener;
         this.manifestListener = manifestListener;
         this.objectListener = objectListener;
         this.qListener = qListener;
         this.scriptListener = scriptListener;
         this.sourceListener = sourceListener;
         this.trackListener = trackListener;
         this.videoListener = videoListener;
     }
 
     public static Builder builder() {
         return new BuilderImpl();
     }
 
     public void parse(String content, String baseUri) {
         Document document = Jsoup.parse(content);
         for (Element child: document.head().children()) {
             if ("link".equals(child.nodeName())) {
                 handleLink(child);
             }
         }
         for (Element child: document.body().children()) {
         }
     }
 
     public void parse(Reader content, String baseUri) throws IOException {
         StringWriter stringWriter = new StringWriter();
         content.transferTo(stringWriter);
         parse(stringWriter.toString(), baseUri);
     }
 
     private void handleLink(Element link) {
         Attributes attributes = link.attributes();
         String[] rels = attributes.getIgnoreCase("rel").split("\\s");
         boolean alternate = false;
         for (String rel: rels) {
             switch (rel) {
                 case "alternate":
                     alternate = true;
                     break;
                 case "stylesheet":
                     String href = attributes.get("href");
                     RelationType type = RelationType.STYLESHEET;
                     if (alternate) {
                         type = RelationType.ALTERNATE_STYLESHEET;
                         alternate = false;
                     }
                     ExternalReferenceEventenceEvent.html#ExternalReferenceEvent">ExternalReferenceEvent event = new ExternalReferenceEvent(link.tagName(), LinkType.EXTERNAL_RESOURCE,
                             href, type);
                     for (ExternalReferenceListener listener : this.linkListener) {
                         listener.link(event);
                     }
                     break;
                 default:
                     break;
             }
         }
     }
 
 
     public interface Builder {
 
         /**
          * &lt;a href ping&gt;
          *
          * @param listener
          * @return
          */
         Builder addAListener(ExternalReferenceListener listener);
 
         /**
          * &lt;area href&gt;
          *
          * @param listener
          * @return
          */
         Builder addAreaListener(ExternalReferenceListener listener);
 
         /**
          * &lt;audio src&gt;
          *
          * @param listener
          * @return
          */
         Builder addAudioListener(ExternalReferenceListener listener);
 
         /**
          * &lt;base href&gt;
          *
          * @param listener
          * @return
          */
         Builder addBaseListener(ExternalReferenceListener listener);
 
         /**
          * &lt;blockquote cite&gt;
          *
          * @param listener
          * @return
          */
         Builder addBlockquoteListener(ExternalReferenceListener listener);
 
         /**
          * &lt;button formaction&gt;
          *
          * @param listener
          * @return
          */
         Builder addButtonListener(ExternalReferenceListener listener);
 
         /**
          * &lt;del cite&gt;
          *
          * @param listener
          * @return
          */
         Builder addDelListener(ExternalReferenceListener listener);
 
         /**
          * &lt;embed src&gt;
          *
          * @param listener
          * @return
          */
         Builder addEmbedListener(ExternalReferenceListener listener);
 
         /**
          * &lt;form action&gt;
          *
          * @param listener
          * @return
          */
         Builder addFormListener(ExternalReferenceListener listener);
 
         /**
          * &lt;iframe src&gt;
          *
          * @param listener
          * @return
          */
         Builder addIframeListener(ExternalReferenceListener listener);
 
         /**
          * &lt;img src srcset&gt;
          *
          * @param listener
          * @return
          */
         Builder addImgListener(ExternalReferenceListener listener);
 
         /**
          * &lt;input src&gt;
          * &lt;input formaction&gt;
          *
          * @param listener
          * @return
          */
         Builder addInputListener(ExternalReferenceListener listener);
 
         /**
          * &lt;ins cite&gt;
          *
          * @param listener
          * @return
          */
         Builder addInsListener(ExternalReferenceListener listener);
 
         /**
          *
          * &lt;... itemid itemprop itemtype&gt;
          *
          * @param listener
          * @return
          */
         Builder addItemListener(ExternalReferenceListener listener);
 
         /**
          * &lt;link href imagesrcset&gt;
          *
          * @param listener
          * @return
          */
         Builder addLinkListener(ExternalReferenceListener listener);
 
         /**
          * &lt;html manifest&gt;
          *
          * @param listener
          * @return
          */
         Builder addManifestListener(ExternalReferenceListener listener);
 
         /**
          * &lt;object data&gt;
          *
          * @param listener
          * @return
          */
         Builder addObjectListener(ExternalReferenceListener listener);
 
         /**
          * &lt;q cite&gt;
          *
          * @param listener
          * @return
          */
         Builder addQListener(ExternalReferenceListener listener);
 
         /**
          * &lt;script src&gt;
          *
          * @param listener
          * @return
          */
         Builder addScriptListener(ExternalReferenceListener listener);
 
         /**
          * &lt;source src srcset&gt;
          *
          * @param listener
          * @return
          */
         Builder addSourceListener(ExternalReferenceListener listener);
 
         /**
          * &lt;track src&gt;
          *
          * @param listener
          * @return
          */
         Builder addTrackListener(ExternalReferenceListener listener);
 
         /**
          * &lt;video poster src&gt;
          *
          * @param listener
          * @return
          */
         Builder addVideoListener(ExternalReferenceListener listener);
 
         SinglePageCrawler build();
 
     }
 
 
     private static class BuilderImpl implements Builder {
 
         private final List<ExternalReferenceListener> aListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> areaListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> audioListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> baseListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> blockquoteListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> buttonListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> delListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> embedListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> formListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> iframeListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> imgListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> inputListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> insListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> itemListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> linkListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> manifestListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> objectListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> qListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> scriptListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> sourceListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> trackListener = new LinkedList<>();
 
         private final List<ExternalReferenceListener> videoListener = new LinkedList<>();
 
         private BuilderImpl() {}
 
         @Override
         public Builder addAListener(final ExternalReferenceListener listener) {
             this.aListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addAreaListener(final ExternalReferenceListener listener) {
             this.areaListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addAudioListener(final ExternalReferenceListener listener) {
             this.audioListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addBaseListener(final ExternalReferenceListener listener) {
             this.baseListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addBlockquoteListener(final ExternalReferenceListener listener) {
             this.blockquoteListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addButtonListener(final ExternalReferenceListener listener) {
             this.buttonListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addDelListener(final ExternalReferenceListener listener) {
             this.delListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addEmbedListener(final ExternalReferenceListener listener) {
             this.embedListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addIframeListener(final ExternalReferenceListener listener) {
             this.iframeListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addImgListener(final ExternalReferenceListener listener) {
             this.imgListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addInputListener(final ExternalReferenceListener listener) {
             this.inputListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addInsListener(final ExternalReferenceListener listener) {
             this.insListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addItemListener(final ExternalReferenceListener listener) {
             this.itemListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addLinkListener(final ExternalReferenceListener listener) {
             this.linkListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addManifestListener(final ExternalReferenceListener listener) {
             this.manifestListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addObjectListener(final ExternalReferenceListener listener) {
             this.objectListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addQListener(final ExternalReferenceListener listener) {
             this.qListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addScriptListener(final ExternalReferenceListener listener) {
             this.scriptListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addSourceListener(final ExternalReferenceListener listener) {
             this.sourceListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addTrackListener(final ExternalReferenceListener listener) {
             this.trackListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addVideoListener(final ExternalReferenceListener listener) {
             this.videoListener.add(listener);
             return this;
         }
 
         @Override
         public Builder addFormListener(final ExternalReferenceListener listener) {
             this.formListener.add(listener);
             return this;
         }
 
         public SinglePageCrawler build() {
             return new SinglePageCrawler(this.aListener, this.areaListener, this.audioListener, this.baseListener,
                     this.blockquoteListener, this.buttonListener, this.delListener, this.embedListener,
                     this.formListener, this.iframeListener, this.imgListener, this.inputListener, this.insListener,
                     this.itemListener, this.linkListener, this.manifestListener, this.objectListener, this.qListener,
                     this.scriptListener, this.sourceListener, this.trackListener, this.videoListener);
         }
 
     }
 
 }