/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.protocol.pcep.object;

import java.util.Collections;
import java.util.List;

import org.opendaylight.protocol.pcep.PCEPObject;
import org.opendaylight.protocol.pcep.PCEPTlv;
import com.google.common.base.Objects.ToStringHelper;

/**
 * Structure of PCEP Open Object.
 *
 * @see <a href="http://tools.ietf.org/html/rfc5440#section-7.3">PCEP Open
 *      Object</a>
 */
public class PCEPOpenObject extends PCEPObject {

    public static final int PCEP_VERSION = 1;

    private final int keepAliveTimerValue;

    private final int deadTimerValue;

    private final int sessionId;

    private final List<PCEPTlv> tlvs;

    /**
     * Constructs PCEP Open Object also with optional Objects.
     *
     * @param keepAliveTimerValue
     *            int
     * @param deadTimerValue
     *            int
     * @param sessionId
     *            int
     * @param tlvs
     *            List<PCEPTlv>
     */
    public PCEPOpenObject(int keepAliveTimerValue, int deadTimerValue, int sessionId, List<PCEPTlv> tlvs) {
	super(false, false);
	this.keepAliveTimerValue = keepAliveTimerValue;
	this.deadTimerValue = deadTimerValue;
	this.sessionId = sessionId;
	if (tlvs != null)
	    this.tlvs = tlvs;
	else
	    this.tlvs = Collections.emptyList();
    }

    /**
     * Constructs PCEP Open Object only with mandatory values.
     *
     * @param keepAliveTimerValue
     *            int
     * @param deadTimerValue
     *            int
     * @param sessionId
     *            int
     */
    public PCEPOpenObject(int keepAliveTimerValue, int deadTimerValue, int sessionId) {
	this(keepAliveTimerValue, deadTimerValue, sessionId, Collections.<PCEPTlv> emptyList());
    }

    /**
     * Returns integer representation of Keep Alive Timer.
     *
     * @return int
     */
    public int getKeepAliveTimerValue() {
	return this.keepAliveTimerValue;
    }

    /**
     * Returns integer representation of Dead Timer.
     *
     * @return int
     */
    public int getDeadTimerValue() {
	return this.deadTimerValue;
    }

    /**
     * Returns integer representation of Session ID.
     *
     * @return int
     */
    public int getSessionId() {
	return this.sessionId;
    }

    /**
     * Gets list of {@link PCEPTlv}.
     *
     * @return List<PCEPTlv>
     */
    public List<PCEPTlv> getTlvs() {
	return this.tlvs;
    }

    @Override
    public int hashCode() {
	final int prime = 31;
	int result = 1;
	result = prime * result + this.deadTimerValue;
	result = prime * result + this.keepAliveTimerValue;
	result = prime * result + this.sessionId;
	result = prime * result + ((this.tlvs == null) ? 0 : this.tlvs.hashCode());
	return result;
    }

    @Override
    public boolean equals(Object obj) {
	if (this == obj)
	    return true;
	if (obj == null)
	    return false;
	if (this.getClass() != obj.getClass())
	    return false;
	final PCEPOpenObject other = (PCEPOpenObject) obj;
	if (this.deadTimerValue != other.deadTimerValue)
	    return false;
	if (this.keepAliveTimerValue != other.keepAliveTimerValue)
	    return false;
	if (this.sessionId != other.sessionId)
	    return false;
	if (this.tlvs == null) {
	    if (other.tlvs != null)
		return false;
	} else if (!this.tlvs.equals(other.tlvs))
	    return false;
	return true;
    }

    @Override
	protected ToStringHelper addToStringAttributes(ToStringHelper toStringHelper) {
		toStringHelper.add("keepAliveTimerValue", this.keepAliveTimerValue);
		toStringHelper.add("deadTimerValue", this.deadTimerValue);
		toStringHelper.add("sessionId", this.sessionId);
		toStringHelper.add("tlvs", this.tlvs);
		return super.addToStringAttributes(toStringHelper);
	}
}