/*
 * 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.controller.netconf.monitoring;

import com.google.common.base.Optional;
import com.google.common.collect.Sets;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.opendaylight.controller.netconf.api.Capability;
import org.opendaylight.controller.netconf.api.monitoring.CapabilityListener;
import org.opendaylight.controller.netconf.mapping.api.NetconfOperationService;
import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceFactory;

/**
* Created by mmarsale on 18.2.2015.
*/
public class NetconfMonitoringOperationServiceFactory implements NetconfOperationServiceFactory, AutoCloseable {

    private final NetconfMonitoringOperationService operationService;

    private static final Set<Capability> CAPABILITIES = Sets.<Capability>newHashSet(new Capability() {

        @Override
        public String getCapabilityUri() {
            return MonitoringConstants.URI;
        }

        @Override
        public Optional<String> getModuleNamespace() {
            return Optional.of(MonitoringConstants.NAMESPACE);
        }

        @Override
        public Optional<String> getModuleName() {
            return Optional.of(MonitoringConstants.MODULE_NAME);
        }

        @Override
        public Optional<String> getRevision() {
            return Optional.of(MonitoringConstants.MODULE_REVISION);
        }

        @Override
        public Optional<String> getCapabilitySchema() {
            return Optional.absent();
        }

        @Override
        public Collection<String> getLocation() {
            return Collections.emptyList();
        }
    });

    private static final AutoCloseable AUTO_CLOSEABLE = new AutoCloseable() {
        @Override
        public void close() throws Exception {
            // NOOP
        }
    };

    private final List<CapabilityListener> listeners = new ArrayList<>();

    public NetconfMonitoringOperationServiceFactory(final NetconfMonitoringOperationService operationService) {
        this.operationService = operationService;
    }

    @Override
    public NetconfOperationService createService(final String netconfSessionIdForReporting) {
        return operationService;
    }

    @Override
    public Set<Capability> getCapabilities() {
        return CAPABILITIES;
    }

    @Override
    public AutoCloseable registerCapabilityListener(final CapabilityListener listener) {
        listener.onCapabilitiesAdded(getCapabilities());
        listeners.add(listener);
        return AUTO_CLOSEABLE;
    }

    @Override
    public void close() {
        for (final CapabilityListener listener : listeners) {
            listener.onCapabilitiesRemoved(getCapabilities());
        }
    }
}