/**
 *    Copyright (C) 2021-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */
#include "mongo/client/streamable_replica_set_monitor_discovery_time_processor.h"

#include <memory>
#include <string>

#include <boost/optional/optional.hpp>

#include "mongo/client/sdam/server_description.h"
#include "mongo/client/sdam/topology_description.h"
#include "mongo/logv2/log.h"
#include "mongo/logv2/log_attr.h"
#include "mongo/logv2/log_component.h"
#include "mongo/util/net/hostandport.h"

#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kNetwork


namespace mongo {

void StreamableReplicaSetMonitor::StreamableReplicaSetMonitorDiscoveryTimeProcessor::
    onTopologyDescriptionChangedEvent(sdam::TopologyDescriptionPtr previousDescription,
                                      sdam::TopologyDescriptionPtr newDescription) {


    const auto oldPrimary = previousDescription->getPrimary();
    const auto oldHost = oldPrimary ? (*oldPrimary)->getAddress().toString() : "Unknown";

    const auto newPrimary = newDescription->getPrimary();
    const auto newHost = newPrimary ? (*newPrimary)->getAddress().toString() : "Unknown";

    if (newHost != oldHost) {
        stdx::lock_guard lock(_mutex);
        LOGV2(6006301,
              "Replica set primary server change detected",
              "replicaSet"_attr = newDescription->getSetName(),
              "topologyType"_attr = newDescription->getType(),
              "primary"_attr = newHost,
              "durationMillis"_attr = _elapsedTime.millis());
        _elapsedTime.reset();
    }
}
Milliseconds StreamableReplicaSetMonitor::StreamableReplicaSetMonitorDiscoveryTimeProcessor::
    getPrimaryServerChangeElapsedTime() const {
    stdx::lock_guard lock(_mutex);
    return Milliseconds(_elapsedTime.millis());
}

};  // namespace mongo
