/*
    * 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.eclipse.aether.util.artifact;
  
  import java.io.File;
  import java.nio.file.Path;
  import java.util.Map;
  import java.util.Objects;
  
  import org.eclipse.aether.artifact.AbstractArtifact;
  import org.eclipse.aether.artifact.Artifact;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * An artifact whose identity is derived from another artifact. <em>Note:</em> Instances of this class are immutable and
   * the exposed mutators return new objects rather than changing the current instance.
   */
  public final class SubArtifact extends AbstractArtifact {
  
      private final Artifact mainArtifact;
  
      private final String classifier;
  
      private final String extension;
  
      private final Path path;
  
      private final Map<String, String> properties;
  
      /**
       * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
       * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
       * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
       * used to refer to the GPG signature of an artifact.
       *
       * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
       * @param classifier The classifier for this artifact, may be {@code null} if none.
       * @param extension The extension for this artifact, may be {@code null} if none.
       */
      public SubArtifact(Artifact mainArtifact, String classifier, String extension) {
          this(mainArtifact, classifier, extension, (File) null);
      }
  
      /**
       * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
       * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
       * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
       * used to refer to the GPG signature of an artifact.
       *
       * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
       * @param classifier The classifier for this artifact, may be {@code null} if none.
       * @param extension The extension for this artifact, may be {@code null} if none.
       * @param file The file for this artifact, may be {@code null} if unresolved.
       */
      public SubArtifact(Artifact mainArtifact, String classifier, String extension, File file) {
          this(mainArtifact, classifier, extension, null, file);
      }
  
      /**
       * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
       * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
       * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
       * used to refer to the GPG signature of an artifact.
       *
       * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
       * @param classifier The classifier for this artifact, may be {@code null} if none.
       * @param extension The extension for this artifact, may be {@code null} if none.
       * @param path The file for this artifact, may be {@code null} if unresolved.
       * @since 2.0.0
       */
      public SubArtifact(Artifact mainArtifact, String classifier, String extension, Path path) {
          this(mainArtifact, classifier, extension, null, path);
      }
  
      /**
       * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
       * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
       * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
       * used to refer to the GPG signature of an artifact.
       *
       * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
       * @param classifier The classifier for this artifact, may be {@code null} if none.
      * @param extension The extension for this artifact, may be {@code null} if none.
      * @param properties The properties of the artifact, may be {@code null}.
      */
     public SubArtifact(Artifact mainArtifact, String classifier, String extension, Map<String, String> properties) {
         this(mainArtifact, classifier, extension, properties, (Path) null);
     }
 
     /**
      * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
      * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
      * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
      * used to refer to the GPG signature of an artifact.
      *
      * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
      * @param classifier The classifier for this artifact, may be {@code null} if none.
      * @param extension The extension for this artifact, may be {@code null} if none.
      * @param properties The properties of the artifact, may be {@code null}.
      * @param file The file for this artifact, may be {@code null} if unresolved.
      */
     public SubArtifact(
             Artifact mainArtifact, String classifier, String extension, Map<String, String> properties, File file) {
         this(mainArtifact, classifier, extension, properties, file != null ? file.toPath() : null);
     }
 
     /**
      * Creates a new sub artifact. The classifier and extension specified for this artifact may use the asterisk
      * character "*" to refer to the corresponding property of the main artifact. For instance, the classifier
      * "*-sources" can be used to refer to the source attachment of an artifact. Likewise, the extension "*.asc" can be
      * used to refer to the GPG signature of an artifact.
      *
      * @param mainArtifact The artifact from which to derive the identity, must not be {@code null}.
      * @param classifier The classifier for this artifact, may be {@code null} if none.
      * @param extension The extension for this artifact, may be {@code null} if none.
      * @param properties The properties of the artifact, may be {@code null}.
      * @param path The file for this artifact, may be {@code null} if unresolved.
      * @since 2.0.0
      */
     public SubArtifact(
             Artifact mainArtifact, String classifier, String extension, Map<String, String> properties, Path path) {
         this.mainArtifact = requireNonNull(mainArtifact, "main artifact cannot be null");
         this.classifier = classifier;
         this.extension = extension;
         this.path = path;
         this.properties = copyProperties(properties);
     }
 
     private SubArtifact(
             Artifact mainArtifact, String classifier, String extension, Path path, Map<String, String> properties) {
         // NOTE: This constructor assumes immutability of the provided properties, for internal use only
         this.mainArtifact = mainArtifact;
         this.classifier = classifier;
         this.extension = extension;
         this.path = path;
         this.properties = properties;
     }
 
     @Override
     public String getGroupId() {
         return mainArtifact.getGroupId();
     }
 
     @Override
     public String getArtifactId() {
         return mainArtifact.getArtifactId();
     }
 
     @Override
     public String getVersion() {
         return mainArtifact.getVersion();
     }
 
     @Override
     public String getBaseVersion() {
         return mainArtifact.getBaseVersion();
     }
 
     @Override
     public boolean isSnapshot() {
         return mainArtifact.isSnapshot();
     }
 
     @Override
     public String getClassifier() {
         return expand(classifier, mainArtifact.getClassifier());
     }
 
     @Override
     public String getExtension() {
         return expand(extension, mainArtifact.getExtension());
     }
 
     @Deprecated
     @Override
     public File getFile() {
         return path != null ? path.toFile() : null;
     }
 
     @Override
     public Path getPath() {
         return path;
     }
 
     @Deprecated
     @Override
     public Artifact setFile(File file) {
         return setPath(file != null ? file.toPath() : null);
     }
 
     @Override
     public Artifact setPath(Path path) {
         if (Objects.equals(this.path, path)) {
             return this;
         }
         return new SubArtifact(mainArtifact, classifier, extension, path, properties);
     }
 
     @Override
     public Map<String, String> getProperties() {
         return properties;
     }
 
     @Override
     public Artifact setProperties(Map<String, String> properties) {
         if (this.properties.equals(properties) || (properties == null && this.properties.isEmpty())) {
             return this;
         }
         return new SubArtifact(mainArtifact, classifier, extension, properties, path);
     }
 
     private static String expand(String pattern, String replacement) {
         String result = "";
         if (pattern != null) {
             result = pattern.replace("*", replacement);
 
             if (replacement.isEmpty()) {
                 if (pattern.startsWith("*")) {
                     int i = 0;
                     for (; i < result.length(); i++) {
                         char c = result.charAt(i);
                         if (c != '-' && c != '.') {
                             break;
                         }
                     }
                     result = result.substring(i);
                 }
                 if (pattern.endsWith("*")) {
                     int i = result.length() - 1;
                     for (; i >= 0; i--) {
                         char c = result.charAt(i);
                         if (c != '-' && c != '.') {
                             break;
                         }
                     }
                     result = result.substring(0, i + 1);
                 }
             }
         }
         return result;
     }
 }