/*
 * Copyright (c) 2016 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.netconf.server;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

import io.netty.util.Timer;
import java.util.Set;
import org.checkerframework.checker.index.qual.NonNegative;
import org.opendaylight.netconf.api.monitoring.NetconfMonitoringService;
import org.opendaylight.netconf.mapping.api.NetconfOperationServiceFactory;
import org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator;

public class NetconfServerSessionNegotiatorFactoryBuilder {
    private Timer timer;
    private SessionIdProvider idProvider;
    private NetconfOperationServiceFactory aggregatedOpService;
    private long connectionTimeoutMillis;
    private NetconfMonitoringService monitoringService;
    private Set<String> baseCapabilities;
    private @NonNegative int maximumIncomingChunkSize =
        AbstractNetconfSessionNegotiator.DEFAULT_MAXIMUM_INCOMING_CHUNK_SIZE;

    public NetconfServerSessionNegotiatorFactoryBuilder() {
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setTimer(final Timer timer) {
        this.timer = timer;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setIdProvider(final SessionIdProvider idProvider) {
        this.idProvider = idProvider;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setAggregatedOpService(
            final NetconfOperationServiceFactory aggregatedOpService) {
        this.aggregatedOpService = aggregatedOpService;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setConnectionTimeoutMillis(final long connectionTimeoutMillis) {
        this.connectionTimeoutMillis = connectionTimeoutMillis;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setMonitoringService(
            final NetconfMonitoringService monitoringService) {
        this.monitoringService = monitoringService;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setBaseCapabilities(final Set<String> baseCapabilities) {
        this.baseCapabilities = baseCapabilities;
        return this;
    }

    public NetconfServerSessionNegotiatorFactoryBuilder setMaximumIncomingChunkSize(
            final @NonNegative int maximumIncomingChunkSize) {
        checkArgument(maximumIncomingChunkSize > 0);
        this.maximumIncomingChunkSize = maximumIncomingChunkSize;
        return this;
    }

    public NetconfServerSessionNegotiatorFactory build() {
        validate();
        return new NetconfServerSessionNegotiatorFactory(timer, aggregatedOpService, idProvider,
                connectionTimeoutMillis, monitoringService, baseCapabilities, maximumIncomingChunkSize);
    }

    private void validate() {
        requireNonNull(timer, "timer not initialized");
        requireNonNull(aggregatedOpService, "NetconfOperationServiceFactory not initialized");
        requireNonNull(idProvider, "SessionIdProvider not initialized");
        checkArgument(connectionTimeoutMillis > 0, "connection time out <=0");
        requireNonNull(monitoringService, "NetconfMonitoringService not initialized");

        if (baseCapabilities == null) {
            baseCapabilities = NetconfServerSessionNegotiatorFactory.DEFAULT_BASE_CAPABILITIES;
        }
    }
}