package org.apache.maven.plugins.dependency.fromConfiguration;

/*
 * 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.
 */

import java.io.File;
import java.util.Collections;
import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.handler.ArtifactHandler;
import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
import org.apache.maven.model.Dependency;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.dependency.AbstractDependencyMojo;
import org.apache.maven.plugins.dependency.utils.DependencyUtil;
import org.apache.maven.plugins.dependency.utils.filters.ArtifactItemFilter;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingRequest;
import org.apache.maven.shared.artifact.filter.collection.ArtifactFilterException;
import org.apache.maven.shared.transfer.artifact.DefaultArtifactCoordinate;
import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolver;
import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolverException;
import org.apache.maven.shared.transfer.repository.RepositoryManager;
import org.codehaus.plexus.util.StringUtils;

/**
 * Abstract parent class used by mojos that get Artifact information from the plugin configuration as an ArrayList of
 * ArtifactItems
 *
 * @author <a href="mailto:brianf@apache.org">Brian Fox</a>
 * @see ArtifactItem
 */
public abstract class AbstractFromConfigurationMojo
    extends AbstractDependencyMojo
{
    /**
     * Default output location used for mojo, unless overridden in ArtifactItem.
     *
     * @since 1.0
     */
    @Parameter( property = "outputDirectory", defaultValue = "${project.build.directory}/dependency" )
    private File outputDirectory;

    /**
     * Overwrite release artifacts
     *
     * @since 1.0
     */
    @Parameter( property = "mdep.overWriteReleases", defaultValue = "false" )
    private boolean overWriteReleases;

    /**
     * Overwrite snapshot artifacts
     *
     * @since 1.0
     */
    @Parameter( property = "mdep.overWriteSnapshots", defaultValue = "false" )
    private boolean overWriteSnapshots;

    /**
     * Overwrite if newer
     *
     * @since 2.0
     */
    @Parameter( property = "mdep.overIfNewer", defaultValue = "true" )
    private boolean overWriteIfNewer;

    /**
     * Collection of ArtifactItems to work on. (ArtifactItem contains groupId, artifactId, version, type, classifier,
     * outputDirectory, destFileName, overWrite and encoding.) See <a href="./usage.html">Usage</a> for details.
     *
     * @since 1.0
     */
    @Parameter
    private List<ArtifactItem> artifactItems;

    /**
     * Path to override default local repository during plugin's execution. To remove all downloaded artifacts as part
     * of the build, set this value to a location under your project's target directory
     *
     * @since 2.2
     */
    @Parameter
    private File localRepositoryDirectory;

    @Component
    private ArtifactResolver artifactResolver;

    @Component
    private RepositoryManager repositoryManager;

    @Component
    private ArtifactHandlerManager artifactHandlerManager;

    abstract ArtifactItemFilter getMarkedArtifactFilter( ArtifactItem item );

    /**
     * artifactItems is filled by either field injection or by setArtifact().
     * 
     * @throws MojoFailureException in case of an error.
     */
    protected void verifyRequirements()
        throws MojoFailureException
    {
        if ( artifactItems == null || artifactItems.isEmpty() )
        {
            throw new MojoFailureException( "Either artifact or artifactItems is required " );
        }
    }

    /**
     * Preprocesses the list of ArtifactItems. This method defaults the outputDirectory if not set and creates the
     * output Directory if it doesn't exist.
     *
     * @param processArtifactItemsRequest preprocessing instructions
     * @return An ArrayList of preprocessed ArtifactItems
     * @throws MojoExecutionException with a message if an error occurs.
     * @see ArtifactItem
     */
    protected List<ArtifactItem> getProcessedArtifactItems( ProcessArtifactItemsRequest processArtifactItemsRequest )
        throws MojoExecutionException
    {

        boolean removeVersion = processArtifactItemsRequest.isRemoveVersion(),
                        prependGroupId = processArtifactItemsRequest.isPrependGroupId(),
                        useBaseVersion = processArtifactItemsRequest.isUseBaseVersion();

        boolean removeClassifier = processArtifactItemsRequest.isRemoveClassifier();

        if ( artifactItems == null || artifactItems.size() < 1 )
        {
            throw new MojoExecutionException( "There are no artifactItems configured." );
        }

        for ( ArtifactItem artifactItem : artifactItems )
        {
            this.getLog().info( "Configured Artifact: " + artifactItem.toString() );

            if ( artifactItem.getOutputDirectory() == null )
            {
                artifactItem.setOutputDirectory( this.outputDirectory );
            }
            artifactItem.getOutputDirectory().mkdirs();

            // make sure we have a version.
            if ( StringUtils.isEmpty( artifactItem.getVersion() ) )
            {
                fillMissingArtifactVersion( artifactItem );
            }

            artifactItem.setArtifact( this.getArtifact( artifactItem ) );

            if ( StringUtils.isEmpty( artifactItem.getDestFileName() ) )
            {
                artifactItem.setDestFileName( DependencyUtil.getFormattedFileName( artifactItem.getArtifact(),
                                                                                   removeVersion, prependGroupId,
                                                                                   useBaseVersion, removeClassifier ) );
            }

            try
            {
                artifactItem.setNeedsProcessing( checkIfProcessingNeeded( artifactItem ) );
            }
            catch ( ArtifactFilterException e )
            {
                throw new MojoExecutionException( e.getMessage(), e );
            }
        }
        return artifactItems;
    }

    private boolean checkIfProcessingNeeded( ArtifactItem item )
        throws MojoExecutionException, ArtifactFilterException
    {
        return StringUtils.equalsIgnoreCase( item.getOverWrite(), "true" )
            || getMarkedArtifactFilter( item ).isArtifactIncluded( item );
    }

    /**
     * Resolves the Artifact from the remote repository if necessary. If no version is specified, it will be retrieved
     * from the dependency list or from the DependencyManagement section of the pom.
     *
     * @param artifactItem containing information about artifact from plugin configuration.
     * @return Artifact object representing the specified file.
     * @throws MojoExecutionException with a message if the version can't be found in DependencyManagement.
     */
    protected Artifact getArtifact( ArtifactItem artifactItem )
        throws MojoExecutionException
    {
        Artifact artifact;

        try
        {
            // mdep-50 - rolledback for now because it's breaking some functionality.
            /*
             * List listeners = new ArrayList(); Set theSet = new HashSet(); theSet.add( artifact );
             * ArtifactResolutionResult artifactResolutionResult = artifactCollector.collect( theSet, project
             * .getArtifact(), managedVersions, this.local, project.getRemoteArtifactRepositories(),
             * artifactMetadataSource, null, listeners ); Iterator iter =
             * artifactResolutionResult.getArtifactResolutionNodes().iterator(); while ( iter.hasNext() ) {
             * ResolutionNode node = (ResolutionNode) iter.next(); artifact = node.getArtifact(); }
             */

            ProjectBuildingRequest buildingRequest = newResolveArtifactProjectBuildingRequest();

            if ( localRepositoryDirectory != null )
            {
                buildingRequest =
                    repositoryManager.setLocalRepositoryBasedir( buildingRequest, localRepositoryDirectory );
            }

            // Map dependency to artifact coordinate
            DefaultArtifactCoordinate coordinate = new DefaultArtifactCoordinate();
            coordinate.setGroupId( artifactItem.getGroupId() );
            coordinate.setArtifactId( artifactItem.getArtifactId() );
            coordinate.setVersion( artifactItem.getVersion() );
            coordinate.setClassifier( artifactItem.getClassifier() );

            final String extension;
            ArtifactHandler artifactHandler = artifactHandlerManager.getArtifactHandler( artifactItem.getType() );
            if ( artifactHandler != null )
            {
                extension = artifactHandler.getExtension();
            }
            else
            {
                extension = artifactItem.getType();
            }
            coordinate.setExtension( extension );

            artifact = artifactResolver.resolveArtifact( buildingRequest, coordinate ).getArtifact();
        }
        catch ( ArtifactResolverException e )
        {
            throw new MojoExecutionException( "Unable to find/resolve artifact.", e );
        }

        return artifact;
    }

    /**
     * Tries to find missing version from dependency list and dependency management. If found, the artifact is updated
     * with the correct version. It will first look for an exact match on artifactId/groupId/classifier/type and if it
     * doesn't find a match, it will try again looking for artifactId and groupId only.
     *
     * @param artifact representing configured file.
     * @throws MojoExecutionException
     */
    private void fillMissingArtifactVersion( ArtifactItem artifact )
        throws MojoExecutionException
    {
        MavenProject project = getProject();
        List<Dependency> deps = project.getDependencies();
        List<Dependency> depMngt = project.getDependencyManagement() == null ? Collections.<Dependency>emptyList()
                        : project.getDependencyManagement().getDependencies();

        if ( !findDependencyVersion( artifact, deps, false )
            && ( project.getDependencyManagement() == null || !findDependencyVersion( artifact, depMngt, false ) )
            && !findDependencyVersion( artifact, deps, true )
            && ( project.getDependencyManagement() == null || !findDependencyVersion( artifact, depMngt, true ) ) )
        {
            throw new MojoExecutionException( "Unable to find artifact version of " + artifact.getGroupId() + ":"
                + artifact.getArtifactId() + " in either dependency list or in project's dependency management." );
        }
    }

    /**
     * Tries to find missing version from a list of dependencies. If found, the artifact is updated with the correct
     * version.
     *
     * @param artifact representing configured file.
     * @param dependencies list of dependencies to search.
     * @param looseMatch only look at artifactId and groupId
     * @return the found dependency
     */
    private boolean findDependencyVersion( ArtifactItem artifact, List<Dependency> dependencies, boolean looseMatch )
    {
        for ( Dependency dependency : dependencies )
        {
            if ( StringUtils.equals( dependency.getArtifactId(), artifact.getArtifactId() )
                && StringUtils.equals( dependency.getGroupId(), artifact.getGroupId() )
                && ( looseMatch || StringUtils.equals( dependency.getClassifier(), artifact.getClassifier() ) )
                && ( looseMatch || StringUtils.equals( dependency.getType(), artifact.getType() ) ) )
            {
                artifact.setVersion( dependency.getVersion() );

                return true;
            }
        }

        return false;
    }

    /**
     * @return Returns the artifactItems.
     */
    public List<ArtifactItem> getArtifactItems()
    {
        return this.artifactItems;
    }

    /**
     * @param theArtifactItems The artifactItems to set.
     */
    public void setArtifactItems( List<ArtifactItem> theArtifactItems )
    {
        this.artifactItems = theArtifactItems;
    }

    /**
     * @return Returns the outputDirectory.
     */
    public File getOutputDirectory()
    {
        return this.outputDirectory;
    }

    /**
     * @param theOutputDirectory The outputDirectory to set.
     */
    public void setOutputDirectory( File theOutputDirectory )
    {
        this.outputDirectory = theOutputDirectory;
    }

    /**
     * @return Returns the overWriteIfNewer.
     */
    public boolean isOverWriteIfNewer()
    {
        return this.overWriteIfNewer;
    }

    /**
     * @param theOverWriteIfNewer The overWriteIfNewer to set.
     */
    public void setOverWriteIfNewer( boolean theOverWriteIfNewer )
    {
        this.overWriteIfNewer = theOverWriteIfNewer;
    }

    /**
     * @return Returns the overWriteReleases.
     */
    public boolean isOverWriteReleases()
    {
        return this.overWriteReleases;
    }

    /**
     * @param theOverWriteReleases The overWriteReleases to set.
     */
    public void setOverWriteReleases( boolean theOverWriteReleases )
    {
        this.overWriteReleases = theOverWriteReleases;
    }

    /**
     * @return Returns the overWriteSnapshots.
     */
    public boolean isOverWriteSnapshots()
    {
        return this.overWriteSnapshots;
    }

    /**
     * @param theOverWriteSnapshots The overWriteSnapshots to set.
     */
    public void setOverWriteSnapshots( boolean theOverWriteSnapshots )
    {
        this.overWriteSnapshots = theOverWriteSnapshots;
    }

    /**
     * @param localRepositoryDirectory {@link #localRepositoryDirectory}
     */
    public void setLocalRepositoryDirectory( File localRepositoryDirectory )
    {
        this.localRepositoryDirectory = localRepositoryDirectory;
    }

    /**
     * @param artifact The artifact.
     * @throws MojoFailureException in case of an error.
     */
    public void setArtifact( String artifact )
        throws MojoFailureException
    {
        if ( artifact != null )
        {
            String packaging = "jar";
            String classifier;
            String[] tokens = StringUtils.split( artifact, ":" );
            if ( tokens.length < 3 || tokens.length > 5 )
            {
                throw new MojoFailureException( "Invalid artifact, "
                    + "you must specify groupId:artifactId:version[:packaging[:classifier]] " + artifact );
            }
            String groupId = tokens[0];
            String artifactId = tokens[1];
            String version = tokens[2];
            if ( tokens.length >= 4 )
            {
                packaging = tokens[3];
            }
            if ( tokens.length == 5 )
            {
                classifier = tokens[4];
            }
            else
            {
                classifier = null;
            }

            ArtifactItem artifactItem = new ArtifactItem();
            artifactItem.setGroupId( groupId );
            artifactItem.setArtifactId( artifactId );
            artifactItem.setVersion( version );
            artifactItem.setType( packaging );
            artifactItem.setClassifier( classifier );

            setArtifactItems( Collections.singletonList( artifactItem ) );
        }
    }
}