/**
 * MailArchiver is an application that provides services for storing and managing e-mail messages through a Web Services SOAP interface.
 * Copyright (C) 2012  Marcio Andre Scholl Levien and Fernando Alberto Reuter Wendt and Jose Ronaldo Nogueira Fonseca Junior
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/******************************************************************************\
*
*  This product was developed by
*
*        SERVIÇO FEDERAL DE PROCESSAMENTO DE DADOS (SERPRO),
*
*  a government company established under Brazilian law (5.615/70),
*  at Department of Development of Porto Alegre.
*
\******************************************************************************/

package serpro.mailarchiver.domain.metaarchive;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;

import javax.jdo.JDOHelper;
import javax.jdo.annotations.NotPersistent;
import javax.jdo.annotations.PersistenceCapable;

import net.coobird.thumbnailator.Thumbnails;
import net.coobird.thumbnailator.Thumbnails.Builder;

import serpro.mailarchiver.util.Logger;

@PersistenceCapable
public class BinaryBody
    extends SingleBody
{
    @NotPersistent
    private static final Logger log = Logger.getLocalLogger();

    @Override
    final String toString(String pad) {
        return String.format(
                "BinaryBody%n"
              + "%1$sjdoState: %2$s%n"
              + "%1$soid: %3$s%n"
              + "%1$shash: %4$x%n"
              + "%1$soffset: %5$d%n"
              + "%1$slength: %6$d%n"
              + "%1$ssize: %7$d"
              , pad
              , JDOHelper.getObjectState(this)
              , getOid()
              , hashCode()
              , getOffset()
              , getLength()
              , getSize());
    }

    //--------------------------------------------------------------------------
    public Path getThumbnailPath(int size) {
        return userAppConfig.SERVER.getArchiveDir().resolve("temp").resolve(getOid()).resolve("thumb").resolve(String.valueOf(size)).resolve(getFileName());
    }

    public void publishThumbnail(int size) throws IOException {

        if(Files.exists(getThumbnailPath(size))) {
            //already published
            return;
        }

        log.info("Publishing: %s/thumb/%d/%s", getOid(), size, getFileName());

        if(Files.notExists(getThumbnailPath(size).getParent())) {
            Files.createDirectories(getThumbnailPath(size).getParent());
        }

        InputStream is = getDecoderInputStream();
        Builder<? extends InputStream> thumbBuilder = Thumbnails
                .of(is)
                .size(size, size)
                .keepAspectRatio(true)
                .allowOverwrite(true);

        int n = getFileName().lastIndexOf('.');
        if(n >= 0) {
            String format = getFileName().substring(n + 1).toLowerCase();
            if(!format.isEmpty()) {
                thumbBuilder.outputFormat(format);
            }
        }

        thumbBuilder.toFile(getThumbnailPath(size).toString());

        is.close();
    }
}