/*
    * 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.plugins.dependency.fromDependencies;
  
  import javax.inject.Inject;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.maven.RepositoryUtils;
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.LifecyclePhase;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.apache.maven.plugins.dependency.utils.CopyUtil;
  import org.apache.maven.plugins.dependency.utils.DependencyStatusSets;
  import org.apache.maven.plugins.dependency.utils.DependencyUtil;
  import org.apache.maven.plugins.dependency.utils.ResolverUtil;
  import org.apache.maven.plugins.dependency.utils.filters.DestFileFilter;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.ProjectBuilder;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.shared.artifact.filter.collection.ArtifactsFilter;
  import org.apache.maven.shared.transfer.artifact.install.ArtifactInstaller;
  import org.apache.maven.shared.transfer.artifact.install.ArtifactInstallerException;
  import org.apache.maven.shared.transfer.repository.RepositoryManager;
  import org.eclipse.aether.resolution.ArtifactResolutionException;
  import org.eclipse.aether.util.artifact.SubArtifact;
  import org.sonatype.plexus.build.incremental.BuildContext;
  
  /**
   * Goal that copies the files for a project's dependencies from the repository to a directory.
   * The default location to copy to is target/dependencies.
   * Since all files are copied to the same directory by default, a dependency that
   * has the same file name as another dependency will be overwritten.
   *
   * @author <a href="mailto:brianf@apache.org">Brian Fox</a>
   * @since 1.0
   */
  @Mojo(
          name = "copy-dependencies",
          requiresDependencyResolution = ResolutionScope.TEST,
          defaultPhase = LifecyclePhase.PROCESS_SOURCES,
          threadSafe = true)
  public class CopyDependenciesMojo extends AbstractFromDependenciesMojo {
      /**
       * Also copy the pom of each artifact.
       *
       * @since 2.0
       */
      @Parameter(property = "mdep.copyPom", defaultValue = "false")
      protected boolean copyPom;
  
      private final CopyUtil copyUtil;
  
      private final ArtifactInstaller installer;
  
      private final RepositoryManager repositoryManager;
  
      /**
       * Either append the artifact's baseVersion or uniqueVersion to the filename. Will only be used if
       * {@link #isStripVersion()} is {@code false}.
       *
       * @since 2.6
       */
      @Parameter(property = "mdep.useBaseVersion", defaultValue = "true")
      protected boolean useBaseVersion = true;
  
      /**
       * Add parent poms to the list of copied dependencies (both current project pom parents and dependencies parents).
       *
       * @since 2.8
       */
      @Parameter(property = "mdep.addParentPoms", defaultValue = "false")
      protected boolean addParentPoms;
 
     /**
      * Also copy the signature files (.asc) of each artifact.
      *
      * @since 3.2.0
      */
     @Parameter(property = "mdep.copySignatures", defaultValue = "false")
     protected boolean copySignatures;
 
     @Inject
     @SuppressWarnings("checkstyle:ParameterNumber")
     public CopyDependenciesMojo(
             MavenSession session,
             BuildContext buildContext,
             MavenProject project,
             ResolverUtil resolverUtil,
             RepositoryManager repositoryManager,
             ProjectBuilder projectBuilder,
             ArtifactHandlerManager artifactHandlerManager,
             CopyUtil copyUtil,
             ArtifactInstaller installer) {
         super(session, buildContext, project, resolverUtil, projectBuilder, artifactHandlerManager);
         this.copyUtil = copyUtil;
         this.installer = installer;
         this.repositoryManager = repositoryManager;
     }
 
     /**
      * Main entry into mojo. Gets the list of dependencies and iterates through calling copyArtifact.
      *
      * @throws MojoExecutionException with a message if an error occurs
      * @see #getDependencySets(boolean, boolean)
      * @see #copyArtifact(Artifact, boolean, boolean, boolean, boolean)
      */
     @Override
     protected void doExecute() throws MojoExecutionException {
         DependencyStatusSets dss = getDependencySets(this.failOnMissingClassifierArtifact, addParentPoms);
         Set<Artifact> artifacts = dss.getResolvedDependencies();
 
         if (!useRepositoryLayout) {
             Map<String, Integer> copies = new HashMap<>();
             for (Artifact artifactItem : artifacts) {
                 String destFileName = DependencyUtil.getFormattedFileName(
                         artifactItem, stripVersion, prependGroupId, useBaseVersion, stripClassifier);
                 int numCopies = copies.getOrDefault(destFileName, 0);
                 copies.put(destFileName, numCopies + 1);
             }
             for (Map.Entry<String, Integer> entry : copies.entrySet()) {
                 if (entry.getValue() > 1) {
                     getLog().warn("Multiple files with the name " + entry.getKey() + " in the dependency tree.");
                     getLog().warn(
                                     "Not all JARs will be available. Consider using prependGroupId, useSubDirectoryPerArtifact, or useRepositoryLayout.");
                 }
             }
 
             for (Artifact artifact : artifacts) {
                 copyArtifact(
                         artifact, isStripVersion(), this.prependGroupId, this.useBaseVersion, this.stripClassifier);
             }
         } else {
             ProjectBuildingRequest buildingRequest =
                     repositoryManager.setLocalRepositoryBasedir(session.getProjectBuildingRequest(), outputDirectory);
 
             artifacts.forEach(artifact -> installArtifact(artifact, buildingRequest));
         }
 
         Set<Artifact> skippedArtifacts = dss.getSkippedDependencies();
         for (Artifact artifact : skippedArtifacts) {
             getLog().info(artifact.getId() + " already exists in destination.");
         }
 
         if (isCopyPom() && !useRepositoryLayout) {
             copyPoms(getOutputDirectory(), artifacts, this.stripVersion);
             copyPoms(getOutputDirectory(), skippedArtifacts, this.stripVersion, this.stripClassifier);
             // Artifacts that already exist may not yet have poms
         }
     }
 
     /**
      * Install the artifact and the corresponding pom if copyPoms=true.
      */
     private void installArtifact(Artifact artifact, ProjectBuildingRequest buildingRequest) {
         try {
             installer.install(buildingRequest, Collections.singletonList(artifact));
             installBaseSnapshot(artifact, buildingRequest);
 
             if (!"pom".equals(artifact.getType()) && isCopyPom()) {
                 Artifact pomArtifact = getResolvedPomArtifact(artifact);
                 if (pomArtifact != null
                         && pomArtifact.getFile() != null
                         && pomArtifact.getFile().exists()) {
                     installer.install(buildingRequest, Collections.singletonList(pomArtifact));
                     installBaseSnapshot(pomArtifact, buildingRequest);
                 }
             }
         } catch (ArtifactInstallerException e) {
             getLog().warn("unable to install " + artifact, e);
         }
     }
 
     private void installBaseSnapshot(Artifact artifact, ProjectBuildingRequest buildingRequest)
             throws ArtifactInstallerException {
         if (artifact.isSnapshot() && !artifact.getBaseVersion().equals(artifact.getVersion())) {
             String version = artifact.getVersion();
             try {
                 artifact.setVersion(artifact.getBaseVersion());
                 installer.install(buildingRequest, Collections.singletonList(artifact));
             } finally {
                 artifact.setVersion(version);
             }
         }
     }
 
     /**
      * Copies the Artifact after building the destination file name if overridden. This method also checks if the
      * classifier is set and adds it to the destination file name if needed.
      *
      * @param artifact the object to be copied
      * @param removeVersion specifies if the version should be removed from the file name when copying
      * @param prependGroupId specifies if the group ID should be prefixed to the file while copying
      * @param theUseBaseVersion specifies if the baseVersion of the artifact should be used instead of the version
      * @throws MojoExecutionException with a message if an error occurs
      * @see #copyArtifact(Artifact, boolean, boolean, boolean, boolean)
      */
     protected void copyArtifact(
             Artifact artifact, boolean removeVersion, boolean prependGroupId, boolean theUseBaseVersion)
             throws MojoExecutionException {
         copyArtifact(artifact, removeVersion, prependGroupId, theUseBaseVersion, false);
     }
 
     private static final String SIGNATURE_EXTENSION = ".asc";
 
     /**
      * Copies the Artifact after building the destination file name if overridden. This method also checks if the
      * classifier is set and adds it to the destination file name if needed.
      *
      * @param artifact the object to be copied
      * @param removeVersion specifies if the version should be removed from the file name when copying
      * @param prependGroupId specifies if the groupId should be prefixed to the file while copying
      * @param useBaseVersion specifies if the baseVersion of the artifact should be used instead of the version
      * @param removeClassifier specifies if the classifier should be removed from the file name when copying
      * @throws MojoExecutionException with a message if an error occurs
      * @see CopyUtil#copyArtifactFile(Artifact, File)
      * @see DependencyUtil#getFormattedOutputDirectory(boolean, boolean, boolean, boolean, boolean, boolean, File, Artifact)
      */
     protected void copyArtifact(
             Artifact artifact,
             boolean removeVersion,
             boolean prependGroupId,
             boolean useBaseVersion,
             boolean removeClassifier)
             throws MojoExecutionException {
 
         String destFileName = DependencyUtil.getFormattedFileName(
                 artifact, removeVersion, prependGroupId, useBaseVersion, removeClassifier);
 
         File destDir = DependencyUtil.getFormattedOutputDirectory(
                 useSubDirectoryPerScope,
                 useSubDirectoryPerType,
                 useSubDirectoryPerArtifact,
                 useRepositoryLayout,
                 stripVersion,
                 stripType,
                 outputDirectory,
                 artifact);
         File destFile = new File(destDir, destFileName);
         if (destFile.exists()) {
             getLog().warn("Overwriting " + destFile);
         }
         try {
             copyUtil.copyArtifactFile(artifact, destFile);
 
             // Copy the signature file if the copySignatures flag is true
             if (copySignatures) {
                 copySignatureFile(artifact, destDir, destFileName);
             }
 
         } catch (IOException e) {
             throw new MojoExecutionException(
                     "Failed to copy artifact '" + artifact + "' (" + artifact.getFile() + ") to " + destFile, e);
         }
     }
 
     /**
      * Copies the signature file of the artifact to the destination directory, if it exists or can be resolved.
      * If the signature file does not exist and cannot be resolved, a warning is logged.
      *
      * @param artifact the artifact whose signature file should be copied
      * @param destDir the destination directory
      * @param destFileName the destination file name without the extension
      */
     private void copySignatureFile(Artifact artifact, File destDir, String destFileName) {
         File signatureFile = new File(artifact.getFile().getAbsolutePath() + SIGNATURE_EXTENSION);
 
         if (!signatureFile.exists()) {
             try {
                 org.eclipse.aether.artifact.Artifact aArtifact = RepositoryUtils.toArtifact(artifact);
                 org.eclipse.aether.artifact.Artifact aSignatureArtifact =
                         new SubArtifact(aArtifact, null, "jar" + SIGNATURE_EXTENSION);
                 org.eclipse.aether.artifact.Artifact resolvedSignature = getResolverUtil()
                         .resolveArtifact(aSignatureArtifact, getProject().getRemoteProjectRepositories());
                 signatureFile = resolvedSignature.getFile();
             } catch (ArtifactResolutionException e) {
                 getLog().warn("Failed to resolve signature file for artifact: " + artifact, e);
             }
         }
 
         if (signatureFile != null && signatureFile.exists()) {
             File signatureDestFile = new File(destDir, destFileName + SIGNATURE_EXTENSION);
             try {
                 copyUtil.copyFile(signatureFile, signatureDestFile);
             } catch (IOException e) {
                 getLog().warn("Failed to copy signature file: " + signatureFile, e);
             }
         } else {
             getLog().warn("Signature file for artifact " + artifact + " not found and could not be resolved.");
         }
     }
 
     /**
      * Copy the pom files associated with the artifacts.
      *
      * @param destDir the destination directory {@link File}
      * @param artifacts the artifacts {@link Artifact}
      * @param removeVersion remove version or not
      * @throws MojoExecutionException in case of errors
      */
     public void copyPoms(File destDir, Set<Artifact> artifacts, boolean removeVersion) throws MojoExecutionException {
 
         copyPoms(destDir, artifacts, removeVersion, false);
     }
 
     /**
      * Copy the pom files associated with the artifacts.
      *
      * @param destDir the destination directory {@link File}
      * @param artifacts the artifacts {@link Artifact}
      * @param removeVersion remove version or not
      * @param removeClassifier remove the classifier or not
      * @throws MojoExecutionException in case of errors
      */
     public void copyPoms(File destDir, Set<Artifact> artifacts, boolean removeVersion, boolean removeClassifier)
             throws MojoExecutionException {
 
         for (Artifact artifact : artifacts) {
             Artifact pomArtifact = getResolvedPomArtifact(artifact);
 
             // Copy the pom
             if (pomArtifact != null
                     && pomArtifact.getFile() != null
                     && pomArtifact.getFile().exists()) {
                 File pomDestFile = new File(
                         destDir,
                         DependencyUtil.getFormattedFileName(
                                 pomArtifact, removeVersion, prependGroupId, useBaseVersion, removeClassifier));
                 if (!pomDestFile.exists()) {
                     try {
                         copyUtil.copyArtifactFile(pomArtifact, pomDestFile);
                     } catch (IOException e) {
                         throw new MojoExecutionException(
                                 "Failed to copy artifact '" + pomArtifact + "' (" + pomArtifact.getFile() + ") to "
                                         + pomDestFile,
                                 e);
                     }
                 }
             }
         }
     }
 
     /**
      * @param artifact {@link Artifact}
      * @return {@link Artifact}
      */
     protected Artifact getResolvedPomArtifact(Artifact artifact) {
 
         Artifact pomArtifact = null;
         // Resolve the pom artifact using repos
         try {
             org.eclipse.aether.artifact.Artifact aArtifact = RepositoryUtils.toArtifact(artifact);
             org.eclipse.aether.artifact.Artifact aPomArtifact = new SubArtifact(aArtifact, null, "pom");
             org.eclipse.aether.artifact.Artifact resolvedPom =
                     getResolverUtil().resolveArtifact(aPomArtifact, getProject().getRemoteProjectRepositories());
             pomArtifact = RepositoryUtils.toArtifact(resolvedPom);
         } catch (ArtifactResolutionException e) {
             getLog().info(e.getMessage());
         }
         return pomArtifact;
     }
 
     @Override
     protected ArtifactsFilter getMarkedArtifactFilter() {
         return new DestFileFilter(
                 this.overWriteReleases,
                 this.overWriteSnapshots,
                 this.overWriteIfNewer,
                 this.useSubDirectoryPerArtifact,
                 this.useSubDirectoryPerType,
                 this.useSubDirectoryPerScope,
                 this.useRepositoryLayout,
                 this.stripVersion,
                 this.prependGroupId,
                 this.useBaseVersion,
                 this.outputDirectory);
     }
 
     /**
      * @return true, if the pom of each artifact must be copied
      */
     public boolean isCopyPom() {
         return this.copyPom;
     }
 
     /**
      * @param copyPom true if the pom of each artifact must be copied
      */
     public void setCopyPom(boolean copyPom) {
         this.copyPom = copyPom;
     }
 }