/*
 * Copyright (c) 2015 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.openflowplugin.applications.notification.supplier.impl.item.stat;

import com.google.common.base.Preconditions;
import java.util.Collections;
import org.opendaylight.mdsal.binding.api.DataBroker;
import org.opendaylight.mdsal.binding.api.NotificationPublishService;
import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupStatisticsUpdated;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupStatisticsUpdatedBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.NodeGroupStatistics;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.group.statistics.GroupStatistics;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.statistics.reply.GroupStatsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

/**
 * Implementation define a contract between {@link GroupStatistics} data object
 * and {@link GroupStatisticsUpdated} notification.
 */
public class GroupStatNotificationSupplierImpl extends AbstractNotificationSupplierForItemStat<GroupStatistics,
        GroupStatisticsUpdated> {

    private static final InstanceIdentifier<GroupStatistics> GROUP_STATISTICS_INSTANCE_IDENTIFIER = getNodeWildII()
            .augmentation(FlowCapableNode.class).child(Group.class).augmentation(NodeGroupStatistics.class)
            .child(GroupStatistics.class);

    /**
     * Constructor register supplier as DataTreeChangeListener and create wildCarded InstanceIdentifier.
     *
     * @param notifProviderService - {@link NotificationPublishService}
     * @param db                   - {@link DataBroker}
     */
    public GroupStatNotificationSupplierImpl(final NotificationPublishService notifProviderService,
                                             final DataBroker db) {
        super(notifProviderService, db, GroupStatistics.class);
    }

    @Override
    public InstanceIdentifier<GroupStatistics> getWildCardPath() {
        return GROUP_STATISTICS_INSTANCE_IDENTIFIER;
    }

    @Override
    public GroupStatisticsUpdated createNotification(final GroupStatistics groupStatistics,
                                                     final InstanceIdentifier<GroupStatistics> path) {
        Preconditions.checkArgument(groupStatistics != null);
        Preconditions.checkArgument(path != null);

        final GroupStatisticsUpdatedBuilder builder = new GroupStatisticsUpdatedBuilder();
        builder.setId(getNodeId(path));
        builder.setMoreReplies(Boolean.FALSE);
        // TODO : fix if it needs, but we have to ask DataStore for the NodeConnector list
        builder.setNodeConnector(Collections.<NodeConnector>emptyList());
        builder.setGroupStats(Collections.singletonList(new GroupStatsBuilder(groupStatistics).build()));
        return builder.build();
    }
}