/*
    * 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.css;
  
  import java.util.Iterator;
  import java.util.Map;
  
  import org.htmlunit.BrowserVersion;
  import org.htmlunit.BrowserVersionFeatures;
  import org.htmlunit.css.StyleAttributes.Definition;
  import org.htmlunit.cssparser.dom.AbstractCSSRuleImpl;
  import org.htmlunit.html.DomElement;
  import org.htmlunit.util.StringUtils;
  
  /**
   * A css StyleDeclaration backed by a {@link DomElement}.
   *
   * @author Mike Bowler
   * @author Christian Sell
   * @author Daniel Gredler
   * @author Chris Erskine
   * @author Ahmed Ashour
   * @author Rodney Gitzel
   * @author Sudhan Moghe
   * @author Ronald Brill
   * @author Frank Danek
   * @author Dennis Duysak
   * @author cd alexndr
   * @author Lai Quang Duong
   */
  public class ElementCssStyleDeclaration extends AbstractCssStyleDeclaration {
  
      // private static final Log LOG = LogFactory.getLog(ElementCssStyleDeclaration.class);
  
      /** The DomElement. */
      private final DomElement domElement_;
  
      /**
       * Creates an instance which backed by the given dom element.
       * @param domElement the dom element this is based on
       */
      public ElementCssStyleDeclaration(final DomElement domElement) {
          super();
          if (domElement == null) {
              throw new IllegalStateException("domElement can't be null");
          }
          domElement_ = domElement;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String getStylePriority(final String name) {
          final StyleElement element = domElement_.getStyleElement(name);
          if (element != null && element.getValue() != null) {
              return element.getPriority();
          }
          return "";
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String getCssText() {
          return domElement_.getAttributeDirect("style");
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String getStyleAttribute(final String name) {
          final StyleElement element = getStyleElement(name);
          if (element != null && element.getValue() != null) {
              final String value = element.getValue();
              if (!value.contains("url")) {
                  return StringUtils.toRootLowerCase(value);
              }
              return value;
          }
          return "";
      }
  
      /**
       * {@inheritDoc}
      */
     @Override
     public String getStyleAttribute(final Definition definition, final boolean getDefaultValueIfEmpty) {
         return getStyleAttribute(definition.getAttributeName());
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void setCssText(final String value) {
         domElement_.setAttribute("style", value);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void setStyleAttribute(final String name, final String newValue, final String important) {
         domElement_.replaceStyleAttribute(name, newValue, important);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String removeStyleAttribute(final String name) {
         return domElement_.removeStyleAttribute(name);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public int getLength() {
         return domElement_.getStyleMap().size();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String item(final int index) {
         if (index < 0) {
             return "";
         }
 
         final Map<String, StyleElement> styles = getStyleMap();
         if (index >= styles.size()) {
             return "";
         }
 
         int i = 0;
         final Iterator<StyleElement> values = styles.values().iterator();
         while (values.hasNext()) {
             if (index == i) {
                 return values.next().getName();
             }
             values.next();
             i++;
         }
         return "";
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public AbstractCSSRuleImpl getParentRule() {
         return null;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public StyleElement getStyleElement(final String name) {
         return domElement_.getStyleElement(name);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public StyleElement getStyleElementCaseInSensitive(final String name) {
         return domElement_.getStyleElementCaseInSensitive(name);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public Map<String, StyleElement> getStyleMap() {
         return domElement_.getStyleMap();
     }
 
     /**
      * Returns the {@link DomElement} associated with this.
      *
      * @return the {@link DomElement} associated with this
      */
     public DomElement getDomElement() {
         return domElement_;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean hasFeature(final BrowserVersionFeatures property) {
         return domElement_.hasFeature(property);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public BrowserVersion getBrowserVersion() {
         return domElement_.getPage().getWebClient().getBrowserVersion();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String toString() {
         return "ElementCssStyleDeclaration for '" + getDomElement() + "'";
     }
 }