/*
 * 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.controller.netconf.persist.impl.osgi;

import com.google.common.base.Optional;
import org.opendaylight.controller.netconf.persist.impl.ConfigPersisterNotificationHandler;
import org.opendaylight.controller.netconf.persist.impl.NoOpStorageAdapter;
import org.opendaylight.controller.netconf.persist.impl.PersisterImpl;
import org.opendaylight.controller.netconf.util.osgi.NetconfConfigUtil;
import org.opendaylight.controller.netconf.util.osgi.NetconfConfigUtil.TLSConfiguration;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.management.MBeanServer;
import java.lang.management.ManagementFactory;
import java.net.InetSocketAddress;

public class ConfigPersisterActivator implements BundleActivator {

    private static final Logger logger = LoggerFactory.getLogger(ConfigPersisterActivator.class);

    private final static MBeanServer platformMBeanServer = ManagementFactory.getPlatformMBeanServer();

    private ConfigPersisterNotificationHandler configPersisterNotificationHandler;

    private Thread initializationThread;

    @Override
    public void start(BundleContext context) throws Exception {
        logger.debug("ConfigPersister activator started");

        Optional<PersisterImpl> maybePersister = PersisterImpl.createFromProperties(context);
        if (maybePersister.isPresent() == false) {
            throw new IllegalStateException("No persister is defined in " + PersisterImpl.STORAGE_ADAPTER_CLASS_PROP
                    + " property. For noop persister use " + NoOpStorageAdapter.class.getCanonicalName()
                    + " . Persister is not operational");
        }

        Optional<TLSConfiguration> maybeTLSConfiguration = NetconfConfigUtil.extractTLSConfiguration(context);
        Optional<InetSocketAddress> maybeTCPAddress = NetconfConfigUtil.extractTCPNetconfAddress(context);

        InetSocketAddress address;
        if (maybeTLSConfiguration.isPresent()) {
            throw new UnsupportedOperationException("TLS is currently not supported for persister");
        } else if (maybeTCPAddress.isPresent()) {
            address = maybeTCPAddress.get();
        } else {
            throw new IllegalStateException("Netconf is not configured, persister is not operational");
        }

        PersisterImpl persister = maybePersister.get();
        configPersisterNotificationHandler = new ConfigPersisterNotificationHandler(persister, address,
                platformMBeanServer);
        Runnable initializationRunnable = new Runnable() {
            @Override
            public void run() {
                try {
                    configPersisterNotificationHandler.init();
                } catch (InterruptedException e) {
                    logger.info("Interrupted while waiting for netconf connection");
                }
            }
        };
        initializationThread = new Thread(initializationRunnable, "ConfigPersister-registrator");
        initializationThread.start();
    }

    @Override
    public void stop(BundleContext context) throws Exception {
        initializationThread.interrupt();
        configPersisterNotificationHandler.close();
    }
}