/*
    * 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.apache.maven.internal.xml;
  
  import java.io.IOException;
  import java.io.Serializable;
  import java.io.StringWriter;
  import java.util.List;
  import java.util.ListIterator;
  import java.util.Map;
  import java.util.Objects;
  import java.util.function.Function;
  
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.xml.XmlNode;
  import org.apache.maven.api.xml.XmlService;
  
  /**
   *  NOTE: remove all the util code in here when separated, this class should be pure data.
   */
  @Deprecated
  @SuppressWarnings("removal")
  public class XmlNodeImpl implements Serializable, XmlNode {
  
      @Nonnull
      protected final String prefix;
  
      @Nonnull
      protected final String namespaceUri;
  
      @Nonnull
      protected final String name;
  
      protected final String value;
  
      @Nonnull
      protected final Map<String, String> attributes;
  
      @Nonnull
      protected final List<XmlNode> children;
  
      protected final Object location;
  
      public XmlNodeImpl(String name) {
          this(name, null, null, null, null);
      }
  
      public XmlNodeImpl(String name, String value) {
          this(name, value, null, null, null);
      }
  
      public XmlNodeImpl(XmlNode from, String name) {
          this(name, from.getValue(), from.getAttributes(), from.getChildren(), from.getInputLocation());
      }
  
      public XmlNodeImpl(
              String name, String value, Map<String, String> attributes, List<XmlNode> children, Object location) {
          this("", "", name, value, attributes, children, location);
      }
  
      public XmlNodeImpl(
              String prefix,
              String namespaceUri,
              String name,
              String value,
              Map<String, String> attributes,
              List<XmlNode> children,
              Object location) {
          this.prefix = prefix == null ? "" : prefix;
          this.namespaceUri = namespaceUri == null ? "" : namespaceUri;
          this.name = Objects.requireNonNull(name);
          this.value = value;
          this.attributes = ImmutableCollections.copy(attributes);
          this.children = ImmutableCollections.copy(children);
          this.location = location;
      }
  
      @SuppressWarnings("removal")
      @Override
      public XmlNode merge(XmlNode source, Boolean childMergeOverride) {
          return XmlService.merge(this, source, childMergeOverride);
      }
  
     // ----------------------------------------------------------------------
     // Name handling
     // ----------------------------------------------------------------------
 
     @Override
     @Nonnull
     @Deprecated(since = "4.0.0", forRemoval = true)
     public String getPrefix() {
         return prefix;
     }
 
     @Override
     @Nonnull
     public String prefix() {
         return getPrefix();
     }
 
     @Override
     @Nonnull
     @Deprecated(since = "4.0.0", forRemoval = true)
     public String getNamespaceUri() {
         return namespaceUri;
     }
 
     @Override
     @Nonnull
     public String namespaceUri() {
         return getNamespaceUri();
     }
 
     @Override
     @Nonnull
     @Deprecated(since = "4.0.0", forRemoval = true)
     public String getName() {
         return name;
     }
 
     @Override
     @Nonnull
     public String name() {
         return getName();
     }
 
     // ----------------------------------------------------------------------
     // Value handling
     // ----------------------------------------------------------------------
 
     @Override
     @Deprecated(since = "4.0.0", forRemoval = true)
     public String getValue() {
         return value;
     }
 
     @Override
     public String value() {
         return getValue();
     }
 
     // ----------------------------------------------------------------------
     // Attribute handling
     // ----------------------------------------------------------------------
 
     @Override
     @Nonnull
     @Deprecated(since = "4.0.0", forRemoval = true)
     public Map<String, String> getAttributes() {
         return attributes;
     }
 
     @Override
     @Nonnull
     public Map<String, String> attributes() {
         return getAttributes();
     }
 
     @Override
     @Deprecated(since = "4.0.0", forRemoval = true)
     public String getAttribute(@Nonnull String name) {
         return attributes.get(name);
     }
 
     @Override
     public String attribute(@Nonnull String name) {
         return getAttribute(name);
     }
 
     // ----------------------------------------------------------------------
     // Child handling
     // ----------------------------------------------------------------------
 
     @Deprecated(since = "4.0.0", forRemoval = true)
     @Override
     public XmlNode getChild(String name) {
         if (name != null) {
             ListIterator<XmlNode> it = children.listIterator(children.size());
             while (it.hasPrevious()) {
                 XmlNode child = it.previous();
                 if (name.equals(child.getName())) {
                     return child;
                 }
             }
         }
         return null;
     }
 
     @Override
     public XmlNode child(String name) {
         return getChild(name);
     }
 
     @Override
     @Nonnull
     @Deprecated(since = "4.0.0", forRemoval = true)
     public List<XmlNode> getChildren() {
         return children;
     }
 
     @Override
     @Nonnull
     public List<XmlNode> children() {
         return getChildren();
     }
 
     @Deprecated(since = "4.0.0", forRemoval = true)
     public int getChildCount() {
         return children.size();
     }
 
     // ----------------------------------------------------------------------
     // Input location handling
     // ----------------------------------------------------------------------
 
     /**
      * @since 3.2.0
      * @return input location
      */
     @Deprecated(since = "4.0.0", forRemoval = true)
     @Override
     public Object getInputLocation() {
         return location;
     }
 
     @Override
     public Object inputLocation() {
         return getInputLocation();
     }
 
     // ----------------------------------------------------------------------
     // Helpers
     // ----------------------------------------------------------------------
 
     @SuppressWarnings("checkstyle:MethodLength")
     public static XmlNode merge(XmlNode dominant, XmlNode recessive, Boolean childMergeOverride) {
         return XmlService.merge(dominant, recessive, childMergeOverride);
     }
 
     /**
      * Merge two DOMs, with one having dominance in the case of collision. Merge mechanisms (vs. override for nodes, or
      * vs. append for children) is determined by attributes of the dominant root node.
      *
      * @see XmlService#CHILDREN_COMBINATION_MODE_ATTRIBUTE
      * @see XmlService#SELF_COMBINATION_MODE_ATTRIBUTE
      * @param dominant The dominant DOM into which the recessive value/attributes/children will be merged
      * @param recessive The recessive DOM, which will be merged into the dominant DOM
      * @return merged DOM
      *
      * @deprecated use {@link XmlService#merge(XmlNode, XmlNode, Boolean)} instead
      */
     @Deprecated(since = "4.0.0", forRemoval = true)
     public static XmlNode merge(XmlNode dominant, XmlNode recessive) {
         return XmlService.merge(dominant, recessive);
     }
 
     // ----------------------------------------------------------------------
     // Standard object handling
     // ----------------------------------------------------------------------
 
     @Override
     public boolean equals(Object o) {
         return this == o
                 || o instanceof XmlNode that
                         && Objects.equals(this.name, that.name())
                         && Objects.equals(this.value, that.value())
                         && Objects.equals(this.attributes, that.attributes())
                         && Objects.equals(this.children, that.children());
     }
 
     @Override
     public int hashCode() {
         return Objects.hash(name, value, attributes, children);
     }
 
     @Override
     public String toString() {
         try {
             StringWriter writer = new StringWriter();
             XmlService.write(this, writer);
             return writer.toString();
         } catch (IOException e) {
             return toStringObject();
         }
     }
 
     public String toStringObject() {
         StringBuilder sb = new StringBuilder();
         sb.append("XmlNode[");
         boolean w = false;
         w = addToStringField(sb, prefix, o -> !o.isEmpty(), "prefix", w);
         w = addToStringField(sb, namespaceUri, o -> !o.isEmpty(), "namespaceUri", w);
         w = addToStringField(sb, name, o -> !o.isEmpty(), "name", w);
         w = addToStringField(sb, value, o -> !o.isEmpty(), "value", w);
         w = addToStringField(sb, attributes, o -> !o.isEmpty(), "attributes", w);
         w = addToStringField(sb, children, o -> !o.isEmpty(), "children", w);
         w = addToStringField(sb, location, Objects::nonNull, "location", w);
         sb.append("]");
         return sb.toString();
     }
 
     private static <T> boolean addToStringField(StringBuilder sb, T o, Function<T, Boolean> p, String n, boolean w) {
         if (!p.apply(o)) {
             if (w) {
                 sb.append(", ");
             } else {
                 w = true;
             }
             sb.append(n).append("='").append(o).append('\'');
         }
         return w;
     }
 }