/*
 * Copyright 2016 Codehaus.
 *
 * Licensed 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.codehaus.plexus.archiver.xz;

import javax.annotation.Nonnull;
import javax.inject.Named;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.compress.compressors.xz.XZCompressorInputStream;
import org.codehaus.plexus.archiver.AbstractUnArchiver;
import org.codehaus.plexus.archiver.ArchiverException;

import static org.codehaus.plexus.archiver.util.Streams.bufferedInputStream;
import static org.codehaus.plexus.archiver.util.Streams.bufferedOutputStream;
import static org.codehaus.plexus.archiver.util.Streams.copyFully;
import static org.codehaus.plexus.archiver.util.Streams.fileInputStream;
import static org.codehaus.plexus.archiver.util.Streams.fileOutputStream;

/**
 * @author philip.lourandos
 * @since 3.3
 */
@Named("xz")
public class XZUnArchiver extends AbstractUnArchiver {

    private static final String OPERATION_XZ = "xz";

    public XZUnArchiver() {}

    public XZUnArchiver(File source) {
        super(source);
    }

    @Override
    protected void execute() throws ArchiverException {
        if (getSourceFile().lastModified() > getDestFile().lastModified()) {
            getLogger()
                    .info("Expanding " + getSourceFile().getAbsolutePath() + " to "
                            + getDestFile().getAbsolutePath());

            copyFully(
                    getXZInputStream(bufferedInputStream(fileInputStream(getSourceFile(), OPERATION_XZ))),
                    bufferedOutputStream(fileOutputStream(getDestFile(), OPERATION_XZ)),
                    OPERATION_XZ);
        }
    }

    public static @Nonnull XZCompressorInputStream getXZInputStream(InputStream in) throws ArchiverException {
        try {
            return new XZCompressorInputStream(in);
        } catch (IOException ioe) {
            throw new ArchiverException("Trouble creating BZIP2 compressor, invalid file ?", ioe);
        }
    }

    @Override
    protected void execute(String path, File outputDirectory) throws ArchiverException {
        throw new UnsupportedOperationException("Targeted execution not supported in xz format");
    }
}
