package org.codehaus.mojo.versions;

/*
 * 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.util.Collection;

import javax.xml.stream.XMLStreamException;

import org.apache.commons.lang3.StringUtils;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException;
import org.apache.maven.model.Dependency;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.project.MavenProject;
import org.codehaus.mojo.versions.api.PomHelper;
import org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader;

/**
 * Replaces any versions with the corresponding version from the reactor.
 *
 * @author Stephen Connolly
 * @since 2.2
 */
@Mojo( name = "use-reactor", requiresProject = true, requiresDirectInvocation = true, threadSafe = true )
public class UseReactorMojo
    extends AbstractVersionsDependencyUpdaterMojo
{

    // ------------------------------ METHODS --------------------------

    /**
     * @param pom the pom to update.
     * @throws org.apache.maven.plugin.MojoExecutionException when things go wrong
     * @throws org.apache.maven.plugin.MojoFailureException when things go wrong in a very bad way
     * @throws javax.xml.stream.XMLStreamException when things go wrong with XML streaming
     * @see AbstractVersionsUpdaterMojo#update(org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader)
     */
    protected void update( ModifiedPomXMLEventReader pom )
        throws MojoExecutionException, MojoFailureException, XMLStreamException
    {
        try
        {
            if ( isProcessingParent() && getProject().hasParent() ) {
                useReactor( pom, getProject().getParent() );
            }
            if ( getProject().getDependencyManagement() != null && isProcessingDependencyManagement() )
            {
                useReactor( pom, getProject().getDependencyManagement().getDependencies() );
            }
            if ( getProject().getDependencies() != null && isProcessingDependencies() )
            {
                useReactor( pom, getProject().getDependencies() );
            }
        }
        catch ( ArtifactMetadataRetrievalException e )
        {
            throw new MojoExecutionException( e.getMessage(), e );
        }
    }

    private void useReactor( ModifiedPomXMLEventReader pom, Collection<Dependency> dependencies )
        throws XMLStreamException, MojoExecutionException, ArtifactMetadataRetrievalException
    {

        for ( Dependency dep : dependencies )
        {
            Artifact artifact = this.toArtifact( dep );
            if ( !isIncluded( artifact ) )
            {
                continue;
            }

            for ( Object reactorProject : reactorProjects )
            {
                MavenProject project = (MavenProject) reactorProject;
                if ( StringUtils.equals( project.getGroupId(), dep.getGroupId() )
                    && StringUtils.equals( project.getArtifactId(), dep.getArtifactId() )
                    && !StringUtils.equals( project.getVersion(), dep.getVersion() ) )
                {
                    if ( PomHelper.setDependencyVersion( pom, dep.getGroupId(), dep.getArtifactId(), dep.getVersion(),
                                                         project.getVersion(), getProject().getModel() ) )
                    {
                        getLog().info( "Updated " + toString( dep ) + " to version " + project.getVersion() );
                    }
                    break;
                }
            }
        }
    }

    private void useReactor( ModifiedPomXMLEventReader pom, MavenProject parent )
            throws XMLStreamException, MojoExecutionException, ArtifactMetadataRetrievalException
    {
        for ( Object reactorProject : reactorProjects )
        {
            MavenProject project = (MavenProject) reactorProject;
            if ( StringUtils.equals( project.getGroupId(), parent.getGroupId() )
                    && StringUtils.equals( project.getArtifactId(), parent.getArtifactId() )
                    && !StringUtils.equals( project.getVersion(), parent.getVersion() ) )
            {
                if ( PomHelper.setProjectParentVersion( pom, project.getVersion() ) )
                {
                    getLog().info( "Updated parent " + toString( parent ) + " to version " + project.getVersion() );
                }
            }

        }
    }

}
