/*
    * Copyright 2012-2017 CodeLibs Project and the Others.
    *
    * 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
    *
    *     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.codelibs.fess.util;
  
  import org.apache.commons.lang3.StringUtils;
  import org.codelibs.core.lang.StringUtil;
  import org.codelibs.core.stream.StreamUtil;
  import org.w3c.dom.Node;
  
  public class PrunedTag {
      private final String tag;
      private String id;
      private String css;
      private String attrName;
      private String attrValue;
  
      public PrunedTag(final String tag) {
          this.tag = tag;
      }
  
      public boolean matches(final Node node) {
          if (tag.equalsIgnoreCase(node.getNodeName())) {
              if (attrName != null) {
                  final Node attr = node.getAttributes().getNamedItem(attrName);
                  if (attr == null || !attrValue.equals(attr.getNodeValue())) {
                      return false;
                  }
              }
              if (id == null) {
                  if (css == null) {
                      return true;
                  } else {
                      final Node classAttr = node.getAttributes().getNamedItem("class");
                      if (classAttr != null) {
                          final String value = classAttr.getNodeValue();
                          if (StringUtil.isNotBlank(value)) {
                              return StreamUtil.split(value, " ").get(stream -> stream.anyMatch(s -> css.equals(s)));
                          }
                      }
                  }
              } else {
                  final Node idAttr = node.getAttributes().getNamedItem("id");
                  if (idAttr != null) {
                      final String value = idAttr.getNodeValue();
                      return id.equals(value);
                  }
              }
          }
          return false;
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((css == null) ? 0 : css.hashCode());
          result = prime * result + ((id == null) ? 0 : id.hashCode());
          result = prime * result + ((tag == null) ? 0 : tag.hashCode());
          return result;
      }
  
      @Override
      public boolean equals(final Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null) {
              return false;
          }
          if (getClass() != obj.getClass()) {
              return false;
          }
          final PrunedTag other = (PrunedTag) obj;
          return StringUtils.compare(tag, other.tag) == 0 //
                  && StringUtils.compare(css, other.css) == 0 //
                  && StringUtils.compare(id, other.id) == 0 //
                  && StringUtils.compare(attrName, other.attrName) == 0 //
                  && StringUtils.compare(attrValue, other.attrValue) == 0;
      }
  
      public void setId(final String id) {
          this.id = id;
      }
  
      public void setCss(final String css) {
          this.css = css;
     }
 
     public void setAttr(final String name, final String value) {
         this.attrName = name;
         this.attrValue = value;
     }
 
     @Override
     public String toString() {
         return "PrunedTag [tag=" + tag + ", id=" + id + ", css=" + css + ", attrName=" + attrName + ", attrValue=" + attrValue + "]";
     }
 }