package org.onlab.onos.cli.net;

import com.google.common.collect.Lists;
import org.apache.karaf.shell.commands.Command;
import org.onlab.onos.cli.Comparators;
import org.onlab.onos.net.topology.TopologyCluster;

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

/**
 * Lists all clusters in the current topology.
 */
@Command(scope = "onos", name = "clusters",
         description = "Lists all clusters in the current topology")
public class ClustersListCommand extends TopologyCommand {

    private static final String FMT =
            "id=%d, devices=%d, links=%d";

    @Override
    protected void execute() {
        init();
        List<TopologyCluster> clusters = Lists.newArrayList(service.getClusters(topology));
        Collections.sort(clusters, Comparators.CLUSTER_COMPARATOR);

        for (TopologyCluster cluster : clusters) {
            print(FMT, cluster.id().index(), cluster.deviceCount(), cluster.linkCount());
        }
    }

}