/*
    * 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.artifact;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Matcher;
  
  import org.apache.maven.artifact.versioning.VersionRange;
  
  /**
   * ArtifactUtils
   */
  public final class ArtifactUtils {
  
      public static boolean isSnapshot(String version) {
          if (version != null) {
              if (version.regionMatches(
                      true,
                      version.length() - Artifact.SNAPSHOT_VERSION.length(),
                      Artifact.SNAPSHOT_VERSION,
                      0,
                      Artifact.SNAPSHOT_VERSION.length())) {
                  return true;
              } else {
                  return Artifact.VERSION_FILE_PATTERN.matcher(version).matches();
              }
          }
          return false;
      }
  
      public static String toSnapshotVersion(String version) {
          notBlank(version, "version can neither be null, empty nor blank");
  
          int lastHyphen = version.lastIndexOf('-');
          if (lastHyphen > 0) {
              int prevHyphen = version.lastIndexOf('-', lastHyphen - 1);
              if (prevHyphen > 0) {
                  Matcher m = Artifact.VERSION_FILE_PATTERN.matcher(version);
                  if (m.matches()) {
                      return m.group(1) + "-" + Artifact.SNAPSHOT_VERSION;
                  }
              }
          }
          return version;
      }
  
      public static String versionlessKey(Artifact artifact) {
          return versionlessKey(artifact.getGroupId(), artifact.getArtifactId());
      }
  
      public static String versionlessKey(String groupId, String artifactId) {
          notBlank(groupId, "groupId can neither be null, empty nor blank");
          notBlank(artifactId, "artifactId can neither be null, empty nor blank");
  
          return groupId + ":" + artifactId;
      }
  
      public static String key(Artifact artifact) {
          return key(artifact.getGroupId(), artifact.getArtifactId(), artifact.getVersion());
      }
  
      public static String key(String groupId, String artifactId, String version) {
          notBlank(groupId, "groupId can neither be null, empty nor blank");
          notBlank(artifactId, "artifactId can neither be null, empty nor blank");
          notBlank(version, "version can neither be null, empty nor blank");
  
          return groupId + ":" + artifactId + ":" + version;
      }
  
      private static void notBlank(String str, String message) {
          final int strLen = str != null ? str.length() : 0;
          if (strLen > 0) {
              for (int i = 0; i < strLen; i++) {
                  if (!Character.isWhitespace(str.charAt(i))) {
                      return;
                  }
              }
          }
          throw new IllegalArgumentException(message);
     }
 
     public static Map<String, Artifact> artifactMapByVersionlessId(Collection<Artifact> artifacts) {
         Map<String, Artifact> artifactMap = new LinkedHashMap<>();
 
         if (artifacts != null) {
             for (Artifact artifact : artifacts) {
                 artifactMap.put(versionlessKey(artifact), artifact);
             }
         }
 
         return artifactMap;
     }
 
     public static Artifact copyArtifactSafe(Artifact artifact) {
         return (artifact != null) ? copyArtifact(artifact) : null;
     }
 
     public static Artifact copyArtifact(Artifact artifact) {
         VersionRange range = artifact.getVersionRange();
 
         // For some reason with the introduction of MNG-1577 we have the case in Yoko where a depMan section has
         // something like the following:
         //
         // <dependencyManagement>
         //     <dependencies>
         //         <!--  Yoko modules -->
         //         <dependency>
         //             <groupId>org.apache.yoko</groupId>
         //             <artifactId>yoko-core</artifactId>
         //             <version>${version}</version>
         //         </dependency>
         // ...
         //
         // And the range is not set so we'll check here and set it. jvz.
 
         if (range == null) {
             range = VersionRange.createFromVersion(artifact.getVersion());
         }
 
         DefaultArtifact clone = new DefaultArtifact(
                 artifact.getGroupId(),
                 artifact.getArtifactId(),
                 range,
                 artifact.getScope(),
                 artifact.getType(),
                 artifact.getClassifier(),
                 artifact.getArtifactHandler(),
                 artifact.isOptional());
         clone.setRelease(artifact.isRelease());
         clone.setResolvedVersion(artifact.getVersion());
         clone.setResolved(artifact.isResolved());
         clone.setFile(artifact.getFile());
 
         clone.setAvailableVersions(copyList(artifact.getAvailableVersions()));
         if (artifact.getVersion() != null) {
             clone.setBaseVersion(artifact.getBaseVersion());
         }
         clone.setDependencyFilter(artifact.getDependencyFilter());
         clone.setDependencyTrail(copyList(artifact.getDependencyTrail()));
         clone.setDownloadUrl(artifact.getDownloadUrl());
         clone.setRepository(artifact.getRepository());
 
         return clone;
     }
 
     /**
      * Copy artifact to a collection.
      *
      * @param <T> the target collection type
      * @param from an artifact collection
      * @param to the target artifact collection
      * @return <code>to</code> collection
      */
     public static <T extends Collection<Artifact>> T copyArtifacts(Collection<Artifact> from, T to) {
         for (Artifact artifact : from) {
             to.add(ArtifactUtils.copyArtifact(artifact));
         }
         return to;
     }
 
     public static <K, T extends Map<K, Artifact>> T copyArtifacts(Map<K, ? extends Artifact> from, T to) {
         if (from != null) {
             for (Map.Entry<K, ? extends Artifact> entry : from.entrySet()) {
                 to.put(entry.getKey(), ArtifactUtils.copyArtifact(entry.getValue()));
             }
         }
 
         return to;
     }
 
     private static <T> List<T> copyList(List<T> original) {
         List<T> copy = null;
 
         if (original != null) {
             copy = new ArrayList<>();
 
             if (!original.isEmpty()) {
                 copy.addAll(original);
             }
         }
 
         return copy;
     }
 }