/**
 * 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.service.web;

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

import javax.jdo.annotations.PersistenceAware;

import org.springframework.beans.factory.annotation.Autowired;

import serpro.mailarchiver.domain.metaarchive.Folder;
import serpro.mailarchiver.domain.metaarchive.Message;
import serpro.mailarchiver.service.BaseService;
import serpro.mailarchiver.service.find.FFolder;
import serpro.mailarchiver.service.find.FMessage;
import serpro.mailarchiver.util.Charsets;
import serpro.mailarchiver.util.Logger;
import serpro.mailarchiver.util.transaction.WithReadOnlyTx;
import serpro.mailarchiver.util.transaction.WithReadWriteTx;

import static com.google.common.base.Strings.isNullOrEmpty;

@PersistenceAware
public class DefaultCopyMessagesOperation
    extends BaseService
    implements CopyMessagesOperation
{
    private static final Logger log = Logger.getLocalLogger();

    @Autowired
    private FFolder findFolder;

    @Autowired
    private FMessage findMessage;

    @Autowired
    private ArchiveOperation archiveOperation;

    @WithReadOnlyTx
    @Override
    public Integer apply(String folderId, String... messagesId) throws ServiceFault {

        Folder folder = findFolder.byId(folderId);

        if(folder == null) {
            ServiceFault.folderNotFound()
                    .setActor("copyMessages")
                    .setMessage("Destination folder not found.")
                    .addValue("folderId", folderId)
                    .raise();
        }

        for(String messageId : messagesId) {
            if(isNullOrEmpty(messageId)) {
                continue;
            }
            copy(folder, messageId);
        }

        return 0;
    }

    @WithReadWriteTx
    private void copy(Folder folder, String messageId) throws ServiceFault {

        Message message = findMessage.byId(messageId);

        if(message == null) {
            ServiceFault.messageNotFound()
                    .setActor("copyMessages")
                    .setMessage("Message not found.")
                    .addValue("messageId", messageId)
                    .raise();
        }

        String msg = null;
        try {
            msg = new String(Files.readAllBytes(message.getAbsolutePath()), Charsets.Windows_1252);
        }
        catch(IOException e) {
            ServiceFault.fileSystemFailure()
                    .setActor("copyMessages")
                    .setMessage("Filesystem read message failure.")
                    .addValue("folderId", folder.getOid())
                    .addValue("folderPath", folder.getRelativePath())
                    .addValue("messageId", message.getOid())
                    .addValue("messagePath", message.getRelativePath())
                    .setCause(e)
                    .raise();
        }

        archiveOperation.apply(folder.getOid(), msg);
    }
}