/*
 * 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.plugin.coreit;

import java.io.File;
import java.util.HashSet;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.ArtifactResolver;
import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Component;
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.project.MavenProject;

/**
 * Attempts to resolve a single artifact from dependencies, and logs the results for the Verifier to look at.
 *
 * @author bimargulies
 */
@Mojo(name = "resolve-one-dependency", requiresDependencyResolution = ResolutionScope.RUNTIME)
public class ResolveOneDependencyMojo extends AbstractDependencyMojo {

    /**
     * Group ID of the artifact to resolve.
     */
    @Parameter(required = true)
    private String groupId;

    /**
     * Artifact ID of the artifact to resolve.
     */
    @Parameter(required = true)
    private String artifactId;

    /**
     * Version  of the artifact to resolve.
     */
    @Parameter(required = true)
    private String version;

    /**
     * Type of the artifact to resolve.
     */
    @Parameter(required = true)
    private String type;

    /**
     * Classifier of the artifact to resolve.
     */
    @Parameter
    private String classifier;

    /**
     * The scope to resolve for.
     */
    @Parameter(required = true)
    private String scope;

    /**
     */
    @Parameter(defaultValue = "${project}", required = true)
    MavenProject project;

    /**
     */
    @Component
    private ArtifactResolver resolver;

    /**
     */
    @Component
    private ArtifactFactory artifactFactory;

    /**
     * The Maven session.
     */
    @Parameter(defaultValue = "${session}", required = true, readonly = true)
    private MavenSession session;

    /**
     * Metadata source object.
     */
    @Component
    private ArtifactMetadataSource metadataSource;

    /**
     * Runs this mojo.
     *
     * @throws MojoExecutionException If the output file could not be created or any dependency could not be resolved.
     */
    public void execute() throws MojoExecutionException {

        Artifact projectArtifact = project.getArtifact();
        if (projectArtifact == null) {
            projectArtifact = artifactFactory.createProjectArtifact(
                    project.getGroupId(), project.getArtifactId(), project.getVersion());
        }

        Set depArtifacts = new HashSet();
        Artifact artifact =
                artifactFactory.createArtifactWithClassifier(groupId, artifactId, version, type, classifier);
        depArtifacts.add(artifact);

        ScopeArtifactFilter scopeFilter = new ScopeArtifactFilter(scope);

        ArtifactResolutionResult result;
        try {
            result = resolver.resolveTransitively(
                    depArtifacts,
                    projectArtifact,
                    project.getManagedVersionMap(),
                    session.getLocalRepository(),
                    project.getRemoteArtifactRepositories(),
                    metadataSource,
                    scopeFilter);
        } catch (ArtifactResolutionException e) {
            throw new MojoExecutionException("RESOLVE-ONE-DEPENDENCY ArtifactResolutionException exception ", e);
        } catch (ArtifactNotFoundException e) {
            throw new MojoExecutionException("RESOLVE-ONE-DEPENDENCY ArtifactNotFoundException exception ", e);
        }

        if (result == null) {
            getLog().info("RESOLVE-ONE-DEPENDENCY null result");
        } else {
            Set resolvedArtifacts = result.getArtifacts();
            /*
             * Assume that the user of this is not interested in transitive deps and such, just report the one.
             */
            for (Object resolvedArtifact : resolvedArtifacts) {
                Artifact a = (Artifact) resolvedArtifact;
                if (a.equals(artifact)) {
                    File file = a.getFile();
                    if (file == null) {
                        getLog().info(" RESOLVE-ONE-DEPENDENCY " + a.toString() + " $ NO-FILE");
                    } else {
                        getLog().info(" RESOLVE-ONE-DEPENDENCY " + a.toString() + " $ " + file.getAbsolutePath());
                    }
                    return;
                }
            }
            getLog().info(" RESOLVE-ONE-DEPENDENCY " + artifact.toString() + " $ NOT-RESOLVED");
        }
    }
}