/*
    * Copyright (c) 2002-2026 Gargoyle Software Inc.
    *
    * 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
    * https://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.htmlunit.javascript.host.dom;
  
  import java.io.IOException;
  
  import org.htmlunit.StringWebResponse;
  import org.htmlunit.WebClient;
  import org.htmlunit.WebResponse;
  import org.htmlunit.WebWindow;
  import org.htmlunit.html.Html;
  import org.htmlunit.html.HtmlPage;
  import org.htmlunit.html.parser.HTMLParser;
  import org.htmlunit.javascript.HtmlUnitScriptable;
  import org.htmlunit.javascript.JavaScriptEngine;
  import org.htmlunit.javascript.configuration.JsxClass;
  import org.htmlunit.javascript.configuration.JsxConstructor;
  import org.htmlunit.javascript.configuration.JsxFunction;
  import org.htmlunit.javascript.host.html.HTMLDocument;
  import org.htmlunit.javascript.host.xml.XMLDocument;
  import org.htmlunit.util.StringUtils;
  import org.htmlunit.util.UrlUtils;
  import org.htmlunit.xml.XmlPage;
  
  /**
   * A JavaScript object for {@code DOMImplementation}.
   *
   * @author Ahmed Ashour
   * @author Frank Danek
   * @author Ronald Brill
   * @author Adam Afeltowicz
   *
   * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation">MDN Documentation</a>
   * @see <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-core.html#ID-102161490">
   *     W3C Dom Level 1</a>
   */
  @JsxClass
  public class DOMImplementation extends HtmlUnitScriptable {
  
      /**
       * JavaScript constructor.
       */
      @JsxConstructor
      public void jsConstructor() {
          // nothing to do
      }
  
      /**
       * Tests if the DOM implementation implements a specific feature.
       * @param feature the name of the feature to test (case-insensitive)
       * @param version the version number of the feature to test
       * @return true if the feature is implemented in the specified version, false otherwise
       */
      @JsxFunction
      public boolean hasFeature(final String feature, final String version) {
          switch (feature) {
              case "Core":
              case "HTML":
              case "XHTML":
              case "XML":
                  switch (version) {
                      case "1.0":
                      case "2.0":
                      case "3.0":
                          return true;
                      default:
                  }
                  break;
  
              case "Views":
                  switch (version) {
                      case "1.0":
                      case "2.0":
                      case "3.0":
                          return true;
                      default:
                  }
                  break;
  
              case "StyleSheets":
              case "KeyboardEvents":
              case "MutationNameEvents":
              case "TextEvents":
              case "LS":
              case "LS-Async":
              case "Validation":
              case "XPath":
                 return true;
 
             case "CSS":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "CSS2":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "CSS3":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "Events":
             case "HTMLEvents":
             case "MouseEvents":
             case "MutationEvents":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "UIEvents":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "Range":
             case "Traversal":
                 switch (version) {
                     case "1.0":
                     case "2.0":
                     case "3.0":
                         return true;
                     default:
                 }
                 break;
 
             case "http://www.w3.org/TR/SVG11/feature#BasicStructure":
             case "http://www.w3.org/TR/SVG11/feature#Shape":
                 switch (version) {
                     case "1.0":
                     case "1.1":
                     case "1.2":
                         return true;
                     default:
                 }
                 break;
 
             default:
         }
         //TODO: other features.
         return false;
     }
 
     /**
      * Creates an {@link XMLDocument}.
      *
      * @param namespaceURI the URI that identifies an XML namespace
      * @param qualifiedName the qualified name of the document to instantiate
      * @param doctype the document types of the document
      * @return the newly created {@link XMLDocument}
      */
     @JsxFunction
     public XMLDocument createDocument(final String namespaceURI, final String qualifiedName,
             final DocumentType doctype) {
         final XMLDocument document = new XMLDocument(getWindow().getWebWindow());
         document.setParentScope(getParentScope());
         document.setPrototype(getPrototype(document.getClass()));
         if (qualifiedName != null && !qualifiedName.isEmpty()) {
             final XmlPage page = (XmlPage) document.getDomNodeOrDie();
             page.appendChild(page.createElementNS(
                     StringUtils.isEmptyString(namespaceURI) ? null : namespaceURI, qualifiedName));
         }
         return document;
     }
 
     /**
      * Creates an {@link HTMLDocument}.
      * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createHTMLDocument">
      *     createHTMLDocument (MDN)</a>
      *
      * @param titleObj the document title
      * @return the newly created {@link HTMLDocument}
      */
     @JsxFunction
     public HTMLDocument createHTMLDocument(final Object titleObj) {
         // a similar impl is in
         // org.htmlunit.javascript.host.dom.DOMParser.parseFromString(String, Object)
         try {
             final WebWindow webWindow = getWindow().getWebWindow();
             final String html;
             if (JavaScriptEngine.isUndefined(titleObj)) {
                 html = Html.DOCTYPE_HTML + "<html><head></head><body></body></html>";
             }
             else {
                 html = Html.DOCTYPE_HTML
                         + "<html><head><title>"
                         + JavaScriptEngine.toString(titleObj)
                         + "</title></head><body></body></html>";
             }
             final WebResponse webResponse = new StringWebResponse(html, UrlUtils.URL_ABOUT_BLANK);
             final HtmlPage page = new HtmlPage(webResponse, webWindow);
             // According to spec and behavior of function in browsers new document
             // has no location object and is not connected with any window
             page.setEnclosingWindow(null);
 
             // document knows the window but is not the windows document
             final HTMLDocument document = new HTMLDocument();
             document.setParentScope(getTopLevelScope(getParentScope()));
             document.setPrototype(getPrototype(document.getClass()));
             // document.setWindow(getWindow());
             document.setDomNode(page);
 
             final WebClient webClient = webWindow.getWebClient();
             final HTMLParser htmlParser = webClient.getPageCreator().getHtmlParser();
             htmlParser.parse(webClient, webResponse, page, false, false);
             return page.getScriptableObject();
         }
         catch (final IOException e) {
             throw JavaScriptEngine.reportRuntimeError("Parsing failed" + e.getMessage());
         }
     }
 }