/**
 * 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.session.Session;
import serpro.mailarchiver.util.Logger;
import serpro.mailarchiver.util.jdo.PersistenceManager;
import serpro.mailarchiver.util.transaction.WithReadWriteTx;

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

    @Autowired
    private FFolder findFolder;

    @WithReadWriteTx
    @Override
    public Integer apply(String folderId, boolean recursive) throws ServiceFault {

        PersistenceManager pm = getPersistenceManager();

        Folder folder = findFolder.byId(folderId);

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

        if(folder.isUserHomeFolder()) {
            ServiceFault.invalidFolderId()
                    .setActor("deleteFolder")
                    .setMessage("Invalid delete of home folder.")
                    .raise();
        }

        if(recursive) {
            deleteRecursively(folder, pm);
        }
        else {
            delete(folder, pm);
        }

        return 0;
    }

    private void deleteRecursively(Folder folder, PersistenceManager pm) throws ServiceFault {
        for(Folder childFolder : folder.getChildren()) {
            deleteRecursively(childFolder, pm);
        }
        for(Message message : folder.getMessages()) {
            try {
                Files.deleteIfExists(message.getAbsolutePath());
                Session.getLuceneIndex().deleteMessage(message.getOid());
                pm.deletePersistent(message);
            }
            catch(IOException e) {
                ServiceFault.fileSystemFailure()
                        .setActor("deleteFolder")
                        .setMessage("Filesystem delete message failure.")
                        .addValue("messagePath", message.getRelativePath())
                        .setCause(e)
                        .raise();
            }
        }
        delete(folder, pm);
    }

    private void delete(Folder folder, PersistenceManager pm) throws ServiceFault {
        if((folder.getChildren().size() > 0) || (folder.getMessages().size() > 0)) {
            ServiceFault.folderNotEmpty()
                    .setActor("deleteFolder")
                    .setMessage("Folder not empty.")
                    .addValue("folderPath", folder.getRelativePath())
                    .raise();
        }

        if(folder.getAbsolutePath().toFile().list().length > 0) {
            ServiceFault.fileSystemFolderNotEmpty()
                    .setActor("deleteFolder")
                    .setMessage("Filesystem directory not empty.")
                    .addValue("folderPath", folder.getRelativePath())
                    .raise();
        }

        try {
            Files.deleteIfExists(folder.getAbsolutePath());
            pm.deletePersistent(folder);
        }
        catch (IOException e) {
            ServiceFault.fileSystemFailure()
                    .setActor("deleteFolder")
                    .setMessage("Filesystem delete directory failure.")
                    .addValue("folder path", folder.getRelativePath())
                    .setCause(e)
                    .raise();
        }
    }
}