/*
 * Copyright © 2017 AT&T 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.transportpce.renderer.provisiondevice;

import com.google.common.collect.Sets;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ForkJoinTask;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.transportpce.common.Timeouts;
import org.opendaylight.transportpce.common.crossconnect.CrossConnect;
import org.opendaylight.transportpce.common.device.DeviceTransactionManager;
import org.opendaylight.transportpce.common.openroadminterfaces.OpenRoadmInterfaceException;
import org.opendaylight.transportpce.common.openroadminterfaces.OpenRoadmInterfaces;
import org.opendaylight.transportpce.common.openroadminterfaces.OpenRoadmInterfacesImpl;
import org.opendaylight.transportpce.renderer.openroadminterface.OpenRoadmInterfaceFactory;
import org.opendaylight.transportpce.renderer.provisiondevice.servicepath.ServiceListTopology;
import org.opendaylight.transportpce.renderer.provisiondevice.servicepath.ServicePathDirection;
import org.opendaylight.yang.gen.v1.http.org.openroadm.common.service.types.rev161014.service.Topology;
import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.get.connection.port.trail.output.Ports;
import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.org.openroadm.device.container.OrgOpenroadmDevice;
import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.org.openroadm.device.container.org.openroadm.device.RoadmConnections;
import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.org.openroadm.device.container.org.openroadm.device.RoadmConnectionsKey;
import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.channel.interfaces.rev161014.OchAttributes.ModulationFormat;
import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.channel.interfaces.rev161014.R100G;
import org.opendaylight.yang.gen.v1.http.org.openroadm.service.rev161014.ServiceList;
import org.opendaylight.yang.gen.v1.http.org.openroadm.service.rev161014.service.list.Services;
import org.opendaylight.yang.gen.v1.http.org.openroadm.service.rev161014.service.list.ServicesBuilder;
import org.opendaylight.yang.gen.v1.http.org.openroadm.service.rev161014.service.list.ServicesKey;
import org.opendaylight.yang.gen.v1.http.org.transportpce.common.types.rev170907.node.interfaces.NodeInterface;
import org.opendaylight.yang.gen.v1.http.org.transportpce.common.types.rev170907.node.interfaces.NodeInterfaceBuilder;
import org.opendaylight.yang.gen.v1.http.org.transportpce.common.types.rev170907.node.interfaces.NodeInterfaceKey;
import org.opendaylight.yang.gen.v1.http.org.transportpce.common.types.rev170907.olm.renderer.input.Nodes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.ServiceNodelist;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.service.nodelist.NodelistBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.service.nodelist.NodelistKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.RendererRollbackInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.RendererRollbackOutput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.RendererRollbackOutputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.ServicePathInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.ServicePathOutput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.ServicePathOutputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.renderer.rollback.output.FailedToRollback;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.renderer.rollback.output.FailedToRollbackBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.renderer.rev170228.renderer.rollback.output.FailedToRollbackKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DeviceRendererServiceImpl implements DeviceRendererService {

    private static final Logger LOG = LoggerFactory.getLogger(DeviceRendererServiceImpl.class);

    private final DataBroker dataBroker;
    private final DeviceTransactionManager deviceTransactionManager;
    private final OpenRoadmInterfaceFactory openRoadmInterfaceFactory;
    private final OpenRoadmInterfaces openRoadmInterfaces;
    private final CrossConnect crossConnect;

    public DeviceRendererServiceImpl(DataBroker dataBroker, DeviceTransactionManager deviceTransactionManager,
            OpenRoadmInterfaceFactory openRoadmInterfaceFactory, OpenRoadmInterfaces openRoadmInterfaces,
            CrossConnect crossConnect) {
        this.dataBroker = dataBroker;
        this.deviceTransactionManager = deviceTransactionManager;
        this.openRoadmInterfaceFactory = openRoadmInterfaceFactory;
        this.openRoadmInterfaces = openRoadmInterfaces;
        this.crossConnect = crossConnect;
    }

    @Override
    public ServicePathOutput setupServicePath(ServicePathInput input, ServicePathDirection direction) {
        List<Nodes> nodes = input.getNodes();
        // Register node for suppressing alarms
        if (!alarmSuppressionNodeRegistration(input)) {
            LOG.warn("Alarm suppresion node registration failed!!!!");
        }

        ConcurrentLinkedQueue<String> results = new ConcurrentLinkedQueue<>();
        Set<NodeInterface> nodeInterfaces = Sets.newConcurrentHashSet();
        Set<String> nodesProvisioned = Sets.newConcurrentHashSet();
        ServiceListTopology topology = new ServiceListTopology();
        AtomicBoolean success = new AtomicBoolean(true);

        ForkJoinPool forkJoinPool = new ForkJoinPool();
        ForkJoinTask forkJoinTask = forkJoinPool.submit(() ->
            nodes.parallelStream().forEach(node -> {
                String nodeId = node.getNodeId();
                LOG.info("Starting provisioning for node : {}", nodeId);
                List<String> createdEthInterfaces = new ArrayList<>();
                List<String> createdOtuInterfaces = new ArrayList<>();
                List<String> createdOduInterfaces = new ArrayList<>();
                List<String> createdOchInterfaces = new ArrayList<>();
                List<String> createdConnections = new ArrayList<>();
                int crossConnectFlag = 0;

                try {
                    // if the node is currently mounted then proceed
                    if (this.deviceTransactionManager.isDeviceMounted(nodeId)) {
                        String srcTp = node.getSrcTp();
                        String destTp = node.getDestTp();

                        Long waveNumber = input.getWaveNumber();
                        if ((destTp != null) && destTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)) {
                            crossConnectFlag++;
                            // create OpenRoadm Xponder Line Interfaces
                            String supportingOchInterface = this.openRoadmInterfaceFactory.createOpenRoadmOchInterface(
                                    nodeId, destTp, waveNumber, R100G.class, ModulationFormat.DpQpsk);
                            createdOchInterfaces.add(supportingOchInterface);

                            String supportingOtuInterface = this.openRoadmInterfaceFactory.createOpenRoadmOtu4Interface(
                                    nodeId, destTp, supportingOchInterface);
                            createdOtuInterfaces.add(supportingOtuInterface);

                            createdOduInterfaces.add(this.openRoadmInterfaceFactory.createOpenRoadmOdu4Interface(
                                    nodeId, destTp,supportingOtuInterface));
                        }
                        if ((srcTp != null) && srcTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)) {
                            crossConnectFlag++;
                            // create OpenRoadm Xponder Client Interfaces
                            createdEthInterfaces.add(this.openRoadmInterfaceFactory.createOpenRoadmEthInterface(nodeId,
                                    srcTp));


                        }
                        if ((srcTp != null) && srcTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)) {
                            crossConnectFlag++;
                            // create OpenRoadm Xponder Line Interfaces
                            String supportingOchInterface = this.openRoadmInterfaceFactory.createOpenRoadmOchInterface(
                                    nodeId, srcTp, waveNumber, R100G.class, ModulationFormat.DpQpsk);
                            createdOchInterfaces.add(supportingOchInterface);

                            String supportingOtuInterface = this.openRoadmInterfaceFactory.createOpenRoadmOtu4Interface(
                                    nodeId, srcTp, supportingOchInterface);
                            createdOtuInterfaces.add(supportingOtuInterface);

                            createdOduInterfaces.add(this.openRoadmInterfaceFactory.createOpenRoadmOdu4Interface(
                                    nodeId, srcTp, supportingOtuInterface));
                        }
                        if ((destTp != null) && destTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)) {
                            crossConnectFlag++;
                            // create OpenRoadm Xponder Client Interfaces
                            createdEthInterfaces.add(this.openRoadmInterfaceFactory.createOpenRoadmEthInterface(nodeId,
                                    destTp));


                        }
                        if ((srcTp != null) && (srcTp.contains(OpenRoadmInterfacesImpl.TTP_TOKEN)
                                || srcTp.contains(OpenRoadmInterfacesImpl.PP_TOKEN))) {
                            createdOchInterfaces.add(this.openRoadmInterfaceFactory .createOpenRoadmOchInterface(nodeId,
                                    srcTp, waveNumber));
                        }
                        if ((destTp != null) && (destTp.contains(OpenRoadmInterfacesImpl.TTP_TOKEN)
                                || destTp.contains(OpenRoadmInterfacesImpl.PP_TOKEN))) {
                            createdOchInterfaces.add(this.openRoadmInterfaceFactory.createOpenRoadmOchInterface(nodeId,
                                    destTp, waveNumber));
                        }
                        if (crossConnectFlag < 1) {
                            LOG.info("Creating cross connect between source {} and destination {} for node {}",
                                    srcTp, destTp, nodeId);
                            Optional<String> connectionNameOpt = this.crossConnect.postCrossConnect(nodeId, waveNumber,
                                    srcTp, destTp);
                            if (connectionNameOpt.isPresent()) {
                                nodesProvisioned.add(nodeId);
                                List<Ports> ports = this.crossConnect.getConnectionPortTrail(nodeId, waveNumber, srcTp,
                                        destTp);
                                if (ServicePathDirection.A_TO_Z.equals(direction)) {
                                    topology.updateAtoZTopologyList(ports, nodeId);
                                }
                                if (ServicePathDirection.Z_TO_A.equals(direction)) {
                                    topology.updateZtoATopologyList(ports, nodeId);

                                }
                                createdConnections.add(connectionNameOpt.get());
                            } else {
                                processErrorMessage("Unable to post Roadm-connection for node " + nodeId, forkJoinPool,
                                        results);
                                success.set(false);
                            }
                        }
                    } else {
                        processErrorMessage(nodeId + " is not mounted on the controller", forkJoinPool, results);
                        success.set(false);
                    }
                } catch (OpenRoadmInterfaceException ex) {
                    processErrorMessage("Setup service path failed! Exception:" + ex.toString(), forkJoinPool, results);
                    success.set(false);
                }

                NodeInterfaceBuilder nodeInterfaceBuilder = new NodeInterfaceBuilder();
                nodeInterfaceBuilder.withKey(new NodeInterfaceKey(nodeId));
                nodeInterfaceBuilder.setNodeId(nodeId);
                nodeInterfaceBuilder.setConnectionId(createdConnections);
                nodeInterfaceBuilder.setEthInterfaceId(createdEthInterfaces);
                nodeInterfaceBuilder.setOtuInterfaceId(createdOtuInterfaces);
                nodeInterfaceBuilder.setOduInterfaceId(createdOduInterfaces);
                nodeInterfaceBuilder.setOchInterfaceId(createdOchInterfaces);
                nodeInterfaces.add(nodeInterfaceBuilder.build());
            })
        );

        try {
            forkJoinTask.get();
        } catch (InterruptedException | ExecutionException e) {
            LOG.error("Error while setting up service paths!", e);
        }

        forkJoinPool.shutdown();

        if (success.get()) {
            results.add("Roadm-connection successfully created for nodes: " + String.join(", ", nodesProvisioned));
        }
        ServicePathOutputBuilder setServBldr = new ServicePathOutputBuilder();
        setServBldr.setNodeInterface(new ArrayList<>(nodeInterfaces));
        setServBldr.setSuccess(success.get());
        setServBldr.setResult(String.join("\n", results));

        //setting topology in the service list data store
        try {
            setTopologyForService(input.getServiceName(), topology.getTopology());
        } catch (InterruptedException | TimeoutException | ExecutionException e) {
            LOG.warn("Failed to write topologies for service {}.", input.getServiceName(), e);
        }

        if (!alarmSuppressionNodeRemoval(input.getServiceName())) {
            LOG.error("Alarm suppresion node removal failed!!!!");
        }

        return setServBldr.build();
    }

    private ConcurrentLinkedQueue<String> processErrorMessage(String message, ForkJoinPool forkJoinPool,
            ConcurrentLinkedQueue<String> messages) {
        LOG.warn(message);
        messages.add(message);
        forkJoinPool.shutdown();
        return messages;
    }

    @Override
    public ServicePathOutput deleteServicePath(ServicePathInput input) {
        List<Nodes> nodes = input.getNodes();
        ServicePathOutputBuilder delServBldr = new ServicePathOutputBuilder();

        ConcurrentLinkedQueue<String> results = new ConcurrentLinkedQueue<>();
        if (!alarmSuppressionNodeRegistration(input)) {
            LOG.warn("Alarm suppresion node registraion failed!!!!");
        }
        ForkJoinPool forkJoinPool = new ForkJoinPool();
        ForkJoinTask forkJoinTask = forkJoinPool.submit(() ->
            nodes.parallelStream().forEach(node -> {
                List<String> interfacesToDelete = new LinkedList<>();
                String nodeId = node.getNodeId();
                LOG.info("Deleting service setup on node {}", nodeId);
                String srcTp = node.getSrcTp();
                String destTp = node.getDestTp();
                Long waveNumber = input.getWaveNumber();

                if ((srcTp == null) || (destTp == null)) {
                    LOG.error("Source ({}) or destination ({}) termination point is null.", srcTp, destTp);
                    return;
                }

                // if the node is currently mounted then proceed.
                if (this.deviceTransactionManager.isDeviceMounted(nodeId)) {
                    if (destTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)
                            || srcTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)
                            || srcTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)
                            || destTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)) {
                        if (destTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)) {
                            interfacesToDelete.add(destTp + "-ODU");
                            interfacesToDelete.add(destTp + "-OTU");
                            interfacesToDelete.add(
                                    this.openRoadmInterfaceFactory.createOpenRoadmOchInterfaceName(destTp, waveNumber));
                        }
                        if (srcTp.contains(OpenRoadmInterfacesImpl.NETWORK_TOKEN)) {
                            interfacesToDelete.add(srcTp + "-ODU");
                            interfacesToDelete.add(srcTp + "-OTU");
                            interfacesToDelete.add(
                                this.openRoadmInterfaceFactory.createOpenRoadmOchInterfaceName(srcTp, waveNumber));
                        }
                        if (srcTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)) {
                            interfacesToDelete.add(srcTp + "-ETHERNET");
                        }
                        if (destTp.contains(OpenRoadmInterfacesImpl.CLIENT_TOKEN)) {
                            interfacesToDelete.add(destTp + "-ETHERNET");
                        }
                    } else {
                        String connectionNumber = srcTp + "-" + destTp + "-" + waveNumber;
                        if (!this.crossConnect.deleteCrossConnect(nodeId, connectionNumber)) {
                            LOG.error("Failed to delete cross connect {}", connectionNumber);
                        }
                        connectionNumber = destTp + "-" + srcTp + "-" + waveNumber;
                        String interfName = this.openRoadmInterfaceFactory.createOpenRoadmOchInterfaceName(srcTp,
                            waveNumber);
                        if (!isUsedByXc(nodeId, interfName, connectionNumber)) {
                            interfacesToDelete.add(interfName);
                        }
                        interfName = this.openRoadmInterfaceFactory.createOpenRoadmOchInterfaceName(destTp, waveNumber);
                        if (!isUsedByXc(nodeId, interfName, connectionNumber)) {
                            interfacesToDelete.add(interfName);
                        }
                    }
                } else {
                    String result = nodeId + " is not mounted on the controller";
                    results.add(result);
                    LOG.warn(result);
                    forkJoinPool.shutdown();
                    return; // TODO should deletion end here?
                }

                for (String interfaceId : interfacesToDelete) {
                    try {
                        this.openRoadmInterfaces.deleteInterface(nodeId, interfaceId);
                    } catch (OpenRoadmInterfaceException e) {
                        String result = String.format("Failed to delete interface %s on node %s!", interfaceId, nodeId);
                        LOG.error(result, e);
                        results.add(result);
                    }
                }
            })
        );

        try {
            forkJoinTask.get();
        } catch (InterruptedException | ExecutionException e) {
            LOG.error("Error while deleting service paths!", e);
        }

        forkJoinPool.shutdown();
        if (!alarmSuppressionNodeRemoval(input.getServiceName())) {
            LOG.error("Alarm suppresion node removal failed!!!!");
        }
        if (results.isEmpty()) {
            return delServBldr.setResult("Request processed").build();
        } else {
            return delServBldr.setResult(String.join("\n", results)).build();
        }
    }

    @Override
    public RendererRollbackOutput rendererRollback(RendererRollbackInput input) {
        boolean success = true;
        List<FailedToRollback> failedToRollbackList = new ArrayList<>();
        for (NodeInterface nodeInterfaces : input.getNodeInterface()) {
            List<String> failedInterfaces = new ArrayList<>();
            String nodeId = nodeInterfaces.getNodeId();
            for (String connectionId : nodeInterfaces.getConnectionId()) {
                if (this.crossConnect.deleteCrossConnect(nodeId, connectionId)) {
                    LOG.info("Cross connect {} on node {} successfully deleted.", connectionId, nodeId);
                } else {
                    LOG.error("Failed to delete cross connect {} on node {}!", connectionId, nodeId);
                    success = false;
                    failedInterfaces.add(connectionId);
                }
            }
            // Interfaces needs to be in specific order to delete. Order is:
            // 1. ODU interfaces
            // 2. OTU interfaces
            // 3. OCH interfaces
            // 4. ETH interfaces
            LinkedList<String> interfacesToDelete = new LinkedList<>();
            if (nodeInterfaces.getOduInterfaceId() != null) {
                interfacesToDelete.addAll(nodeInterfaces.getOduInterfaceId());
            }
            if (nodeInterfaces.getOtuInterfaceId() != null) {
                interfacesToDelete.addAll(nodeInterfaces.getOtuInterfaceId());
            }
            if (nodeInterfaces.getOchInterfaceId() != null) {
                interfacesToDelete.addAll(nodeInterfaces.getOchInterfaceId());
            }
            if (nodeInterfaces.getEthInterfaceId() != null) {
                interfacesToDelete.addAll(nodeInterfaces.getEthInterfaceId());
            }

            LOG.info("Going to execute rollback on node {}. Interfaces to rollback: {}", nodeId,
                    String.join(", ", interfacesToDelete));

            for (String interfaceId : interfacesToDelete) {
                try {
                    this.openRoadmInterfaces.deleteInterface(nodeId, interfaceId);
                    LOG.info("Interface {} on node {} successfully deleted.", interfaceId, nodeId);
                } catch (OpenRoadmInterfaceException e) {
                    LOG.error("Failed to delete interface {} on node {}!", interfaceId, nodeId);
                    success = false;
                    failedInterfaces.add(interfaceId);
                }
            }
            failedToRollbackList.add(new FailedToRollbackBuilder()
                    .withKey(new FailedToRollbackKey(nodeId))
                    .setNodeId(nodeId)
                    .setInterface(failedInterfaces)
                    .build()
            );
        }
        return new RendererRollbackOutputBuilder()
                .setSuccess(success)
                .setFailedToRollback(failedToRollbackList)
                .build();
    }

    private boolean alarmSuppressionNodeRegistration(ServicePathInput input) {
        NodelistBuilder nodeListBuilder = new NodelistBuilder();
        nodeListBuilder.withKey(new NodelistKey(input.getServiceName()));
        nodeListBuilder.setServiceName(input.getServiceName());
        List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.service
            .nodelist.nodelist.Nodes> nodeList = new ArrayList<>();
        for (Nodes node: input.getNodes()) {
            nodeList.add(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns
                    .yang.alarmsuppression.rev171102.service.nodelist.nodelist.NodesBuilder()
                    .setNodeId(node.getNodeId()).build());
        }
        nodeListBuilder.setNodes(nodeList);
        InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params
            .xml.ns.yang.alarmsuppression.rev171102.service.nodelist.Nodelist> nodeListIID =
            InstanceIdentifier.create(ServiceNodelist.class).child(org.opendaylight.yang.gen.v1.urn
            .opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.service.nodelist.Nodelist.class,
                    new NodelistKey(input.getServiceName()));
        final WriteTransaction writeTransaction = this.dataBroker.newWriteOnlyTransaction();
        writeTransaction.merge(LogicalDatastoreType.CONFIGURATION, nodeListIID, nodeListBuilder.build());
        Future<Void> submit = writeTransaction.submit();
        try {
            submit.get(Timeouts.DATASTORE_WRITE, TimeUnit.MILLISECONDS);
            LOG.info("Nodes are register for alarm suppression for service: {}",
                    input.getServiceName());
            return true;

        } catch (ExecutionException | InterruptedException | TimeoutException e) {
            LOG.warn("Failed to alarm suppresslist for service: {}", input.getServiceName(), e);
            return false;
        }
    }

    private boolean alarmSuppressionNodeRemoval(String serviceName) {
        InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params
            .xml.ns.yang.alarmsuppression.rev171102.service.nodelist.Nodelist> nodeListIID =
            InstanceIdentifier.create(ServiceNodelist.class).child(org.opendaylight.yang.gen.v1.urn
                .opendaylight.params.xml.ns.yang.alarmsuppression.rev171102.service.nodelist.Nodelist.class,
                        new NodelistKey(serviceName));
        final WriteTransaction writeTransaction = this.dataBroker.newWriteOnlyTransaction();
        writeTransaction.delete(LogicalDatastoreType.CONFIGURATION, nodeListIID);
        Future<Void> submit = writeTransaction.submit();
        try {
            submit.get(Timeouts.DATASTORE_DELETE, TimeUnit.MILLISECONDS);
            LOG.info("Nodes are unregister for alarm suppression for service: {}", serviceName);
            return true;

        } catch (InterruptedException | TimeoutException | ExecutionException e) {
            LOG.warn("Failed to alarm suppresslist for service: {}", serviceName, e);
            return false;
        }
    }

    private void setTopologyForService(String serviceName, Topology topo)
            throws InterruptedException, ExecutionException, TimeoutException {

        ServicesBuilder servicesBuilder;
        //Get the service from the service list inventory

        ServicesKey serviceKey = new ServicesKey(serviceName);
        InstanceIdentifier<Services> iid =
                InstanceIdentifier.create(ServiceList.class).child(Services.class, serviceKey);
        Optional<Services> services;
        try (ReadOnlyTransaction readTx = this.dataBroker.newReadOnlyTransaction()) {
            Future<com.google.common.base.Optional<Services>> future = readTx.read(LogicalDatastoreType.OPERATIONAL,
                iid);
            services = future.get(Timeouts.DATASTORE_READ, TimeUnit.MILLISECONDS).toJavaUtil();
        } catch (InterruptedException | ExecutionException | TimeoutException e) {
            throw e;
        }

        if (services.isPresent()) {
            servicesBuilder = new ServicesBuilder(services.get());
        } else {
            servicesBuilder = new ServicesBuilder();
            servicesBuilder.withKey(serviceKey);
        }
        servicesBuilder.setTopology(topo);

        WriteTransaction writeTx = this.dataBroker.newWriteOnlyTransaction();
        writeTx.merge(LogicalDatastoreType.OPERATIONAL, iid, servicesBuilder.build());
        writeTx.submit().get(Timeouts.DATASTORE_WRITE, TimeUnit.MILLISECONDS);

    }

    private boolean isUsedByXc(String nodeid, String interfaceid, String xcid) {
        InstanceIdentifier<RoadmConnections> xciid = InstanceIdentifier.create(OrgOpenroadmDevice.class)
            .child(RoadmConnections.class, new RoadmConnectionsKey(xcid));
        LOG.info("reading xc {} in node {}", xcid, nodeid);
        Optional<RoadmConnections> crossconnection = deviceTransactionManager.getDataFromDevice(nodeid,
            LogicalDatastoreType.CONFIGURATION, xciid, Timeouts.DEVICE_READ_TIMEOUT,
            Timeouts.DEVICE_READ_TIMEOUT_UNIT);
        if (crossconnection.isPresent()) {
            RoadmConnections xc = crossconnection.get();
            LOG.info("xd {} found", xcid);
            if (xc.getSource().getSrcIf().equals(interfaceid) || xc.getDestination().getDstIf().equals(
                interfaceid)) {
                return true;
            }
        } else {
            LOG.info("xd {} not found !", xcid);
        }
        return false;
    }
}