/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
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 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */
package org.glassfish.spec.maven;

import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.jar.JarFile;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.codehaus.plexus.util.FileUtils;
import org.glassfish.spec.Artifact;
import org.glassfish.spec.Metadata;
import org.glassfish.spec.Spec;


/**
 *
 * @goal check-distribution
 *
 * @author Romain Grecourt
 */
public class CheckDistributionMojo extends AbstractMojo {
    
    /**
     * include pattern
     * 
     * @parameter expression="${includes}" default-value="javax*.jar"
     */
    protected String includes;
    
    /**
     * exclude pattern
     * 
     * @parameter expression="${excludes}"
     */
    protected String excludes;
    
    /**
     * include pattern for inclusion
     * 
     * @required
     * @parameter expression="${dir}"
     */
    protected File dir;
    
    /**
     * Specs
     * 
     * @parameter expression="${specs}"
     */    
    protected List<Spec> specs;
    
    
    private Spec getSpec(File f) throws IOException{
        JarFile j = new JarFile(f);
        Artifact a = Artifact.fromJar(j);
        for(Spec s : specs){
            if(s.getArtifact().equals(a)){
                s.setMetadata(Metadata.fromJar(j));
                return s;
            }
        }
        Spec spec = new Spec();
        spec.setArtifact(a);
        spec.setMetadata(Metadata.fromJar(j));
        return spec;
    }
    
    @Override
    public void execute() throws MojoExecutionException, MojoFailureException {
        if(!dir.exists()){
            String msg = String.format(
                    "directory (%s) does not exist",
                    dir.getAbsolutePath());
            getLog().error(msg);
            throw new MojoFailureException(msg);
        }
        
        List<File> jars = Collections.EMPTY_LIST;
        try {
            jars = FileUtils.getFiles(dir, includes, excludes);
        } catch (IOException ex) {
            throw new MojoExecutionException(ex.getMessage(), ex);
        }
        
        for (File jar : jars) {
            try {
                Spec spec = getSpec(jar);
                spec.verify();

                if (!spec.getErrors().isEmpty()) {
                    System.out.println("");
                    System.out.println(spec.getArtifact().toString());
                    String specDesc = spec.toString();
                    if(!specDesc.isEmpty()){
                        System.out.println(spec.toString());
                    }
                    for (int i = 0; i < spec.getErrors().size(); i++) {
                        System.out.println(new StringBuilder()
                                .append('-')
                                .append(' ')
                                .append(spec.getErrors().get(i))
                                .toString());
                    }
                    System.out.println("");
                }
            } catch (IOException ex) {
                getLog().warn(ex.getMessage(), ex);
            }
        }
    }
}