/*
    * 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.impl;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.Objects;
  import java.util.regex.Pattern;
  
  import org.apache.maven.api.Version;
  import org.apache.maven.api.VersionRange;
  import org.apache.maven.api.services.VersionParser;
  import org.apache.maven.api.services.VersionParserException;
  import org.apache.maven.artifact.versioning.ArtifactVersion;
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
  
  import static org.apache.maven.artifact.versioning.VersionRange.createFromVersionSpec;
  import static org.apache.maven.internal.impl.Utils.nonNull;
  
  @Named
  @Singleton
  public class DefaultVersionParser implements VersionParser {
      private static final String SNAPSHOT = "SNAPSHOT";
      private static final Pattern SNAPSHOT_TIMESTAMP = Pattern.compile("^(.*-)?([0-9]{8}\\.[0-9]{6}-[0-9]+)$");
  
      @Override
      public Version parseVersion(String version) {
          return new DefaultVersion(new DefaultArtifactVersion(nonNull(version, "version")));
      }
  
      @Override
      public VersionRange parseVersionRange(String range) {
          try {
              return new DefaultVersionRange(createFromVersionSpec(nonNull(range, "version")));
          } catch (InvalidVersionSpecificationException e) {
              throw new VersionParserException("Unable to parse version range: " + range, e);
          }
      }
  
      @Override
      public boolean isSnapshot(String version) {
          return checkSnapshot(version);
      }
  
      static boolean checkSnapshot(String version) {
          return version.endsWith(SNAPSHOT) || SNAPSHOT_TIMESTAMP.matcher(version).matches();
      }
  
      static class DefaultVersion implements Version {
          private final ArtifactVersion delegate;
  
          DefaultVersion(ArtifactVersion delegate) {
              this.delegate = delegate;
          }
  
          @Override
          public int compareTo(Version o) {
              if (o instanceof DefaultVersion) {
                  return delegate.compareTo(((DefaultVersion) o).delegate);
              } else {
                  return delegate.compareTo(new DefaultArtifactVersion(o.toString()));
              }
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) {
                  return true;
              }
              if (o == null || getClass() != o.getClass()) {
                  return false;
              }
              DefaultVersion that = (DefaultVersion) o;
              return delegate.equals(that.delegate);
          }
  
          @Override
          public int hashCode() {
              return Objects.hash(delegate);
          }
  
         @Override
         public String asString() {
             return delegate.toString();
         }
 
         @Override
         public String toString() {
             return asString();
         }
     }
 
     static class DefaultVersionRange implements VersionRange {
         private final org.apache.maven.artifact.versioning.VersionRange delegate;
 
         DefaultVersionRange(org.apache.maven.artifact.versioning.VersionRange delegate) {
             this.delegate = delegate;
         }
 
         @Override
         public boolean contains(Version version) {
             if (version instanceof DefaultVersion) {
                 return delegate.containsVersion(((DefaultVersion) version).delegate);
             } else {
                 return delegate.containsVersion(new DefaultArtifactVersion(version.toString()));
             }
         }
 
         @Override
         public String asString() {
             return delegate.toString();
         }
 
         @Override
         public String toString() {
             return asString();
         }
     }
 }