/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.ss7.hardware.dahdi.oam;

import org.mobicents.ss7.linkset.oam.LinkOAMMessages;
import org.mobicents.ss7.linkset.oam.Linkset;
import org.mobicents.ss7.linkset.oam.LinksetFactory;

/**
 * <p>
 * Factory for creating <tt>dahdi</tt> based {@link Linkset}
 * </p>
 * 
 * @author amit bhayani
 * 
 */
public class DahdiLinksetFactory extends LinksetFactory {

    private static final String NAME = "dahdi";

    public DahdiLinksetFactory() {
    }

    @Override
    public String getName() {
        return NAME;
    }

    @Override
    public Linkset createLinkset(String[] options) throws Exception {

        // the expected command is "linkset create dahdi opc 1 apc 2 ni 3
        // linkset1". We know length is 10
        if (options.length != 10) {
            throw new Exception(LinkOAMMessages.INVALID_COMMAND);
        }

        String option = options[3];

        // If first option is not OPC
        if (option.compareTo("opc") != 0) {
            return null;
        }

        int opc = Integer.parseInt(options[4]);

        if (options[5].compareTo("apc") != 0) {
            throw new Exception(LinkOAMMessages.INVALID_COMMAND);
        }

        int dpc = Integer.parseInt(options[6]);

        if (options[7].compareTo("ni") != 0) {
            throw new Exception(LinkOAMMessages.INVALID_COMMAND);
        }

        int ni = Integer.parseInt(options[8]);

        String name = options[9];

        if (name == null) {
            throw new Exception(LinkOAMMessages.INVALID_COMMAND);
        }

        return new DahdiLinkset(name, opc, dpc, ni);
    }

}