/*
 * Copyright (C) 2011 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser 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 Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.worker.business.requester;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.ourgrid.common.interfaces.to.OutgoingHandle;
import org.ourgrid.common.internal.IResponseTO;
import org.ourgrid.common.internal.RequesterIF;
import org.ourgrid.common.internal.response.LoggerResponseTO;
import org.ourgrid.worker.business.controller.FileTransferController;
import org.ourgrid.worker.business.dao.FileTransferDAO;
import org.ourgrid.worker.business.dao.WorkerDAOFactory;
import org.ourgrid.worker.business.dao.WorkerStatusDAO;
import org.ourgrid.worker.business.messages.WorkerControllerMessages;
import org.ourgrid.worker.request.OutgoingTransferCancelledRequestTO;

public class OutgoingTransferCancelledRequester implements
		RequesterIF<OutgoingTransferCancelledRequestTO> {

	public List<IResponseTO> execute(OutgoingTransferCancelledRequestTO request) {
		List<IResponseTO> responses = new ArrayList<IResponseTO>();

		OutgoingHandle handle = request.getHandle();
		WorkerStatusDAO workerStatusDAO = WorkerDAOFactory.getInstance()
				.getWorkerStatusDAO();

		File fileCancelled = WorkerDAOFactory.getInstance()
				.getFileTransferDAO().getUploadingFile(handle);
		String senderPublicKey = request.getSenderPublicKey();

		if (!workerStatusDAO.isWorkingState()) {
			responses
					.add(new LoggerResponseTO(
							WorkerControllerMessages
									.getWorkerIsNotInWorkingStateTrasferCancelledMessage(senderPublicKey),
							LoggerResponseTO.WARN));

			return responses;
		}

		FileTransferDAO fileTransrfeDAO = WorkerDAOFactory.getInstance()
				.getFileTransferDAO();

		if (workerStatusDAO.isWorkingState()
				&& fileTransrfeDAO.getUploadingFileHandles().isEmpty()) {
			responses
					.add(new LoggerResponseTO(
							WorkerControllerMessages
									.workerReceivedAnOutGoingTransferCanceledAndDoNotStartedTheUploadMessage(senderPublicKey),
							LoggerResponseTO.WARN));

			return responses;
		}

		if (fileCancelled == null) {
			responses
					.add(new LoggerResponseTO(
							WorkerControllerMessages
									.getWorkerReceivesAnOutgoingFileTransferCancelledWithUnknownHandleMessage(
											handle.getId(),
											request.getAmountUploaded(),
											senderPublicKey),
							LoggerResponseTO.WARN));

			return responses;
		}

		String filePath = fileCancelled.getAbsolutePath();

		if (workerStatusDAO.isFileTransferErrorState()) {
			responses
					.add(new LoggerResponseTO(
							WorkerControllerMessages
									.getWorkerWithErrorReceivesAnOutgoingFileTransferCancelledMessage(
											filePath, handle.getId(),
											request.getAmountUploaded(),
											senderPublicKey),
							LoggerResponseTO.WARN));

			return responses;
		}

		FileTransferController.getInstance().outgoingTransferCancelled(handle,
				request.getAmountUploaded(), responses);

		return responses;
	}
}