/**
 * 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 java.nio.file.Path;
import java.nio.file.StandardCopyOption;

import javax.jdo.annotations.PersistenceAware;

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

import serpro.mailarchiver.domain.metaarchive.Folder;
import serpro.mailarchiver.service.BaseService;
import serpro.mailarchiver.service.dto.TFolder;
import serpro.mailarchiver.service.find.FFolder;
import serpro.mailarchiver.util.Logger;
import serpro.mailarchiver.util.transaction.WithReadWriteTx;

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

    @Autowired
    private FFolder findFolder;

    @WithReadWriteTx
    @Override
    public TFolder apply(String folderId, String newName) throws ServiceFault {

        if(newName.isEmpty()) {
            ServiceFault.invalidFolderName()
                    .setActor("renameFolder")
                    .setMessage("New folder name is null or empty.")
                    .raise();
        }

        Folder folder = findFolder.byId(folderId);

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

        if(folder.isUserHomeFolder()) {
            ServiceFault.invalidFolderId()
                    .setActor("renameFolder")
                    .setMessage("Invalid renaming of user home folder.")
                    .addValue("folderId", folderId)
                    .raise();
        }

        String currentName = folder.getName();

        if(folder.isSpecialFolder()) {
            if(!newName.equalsIgnoreCase(currentName)) {
                ServiceFault.invalidFolderId()
                        .setActor("renameFolder")
                        .setMessage("Invalid renaming of special folder.")
                        .addValue("folderId", folderId)
                        .raise();
            }
        }

        for(Folder sibling : folder.getParent().getChildren()) {

            if(sibling == folder) {
                continue;
            }

            if(sibling.getName().equalsIgnoreCase(newName)) {
                ServiceFault.folderNameAlreadyExists()
                        .setActor("renameFolder")
                        .setMessage("An sibling folder with the same name already exist.")
                        .addValue("folderId", folderId)
                        .addValue("newName", newName)
                        .raise();
            }
        }

        if(!newName.equals(currentName)) {
            try {
                Path source = folder.getAbsolutePath();
                folder.setName(newName);
                Path target = folder.getAbsolutePath();
                Files.move(source, target, StandardCopyOption.ATOMIC_MOVE);
            }
            catch(IOException e) {
                folder.setName(currentName);
                ServiceFault.fileSystemFailure()
                        .setActor("renameFolder")
                        .setMessage("Filesystem rename folder failure.")
                        .addValue("folderId", folderId)
                        .addValue("currentName", currentName)
                        .addValue("newName", newName)
                        .setCause(e)
                        .raise();
            }
        }

        return new TFolder(folder);
    }
}