/**
 *    Copyright (C) 2018-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.
 */

#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kDefault

#include "mongo/platform/basic.h"

#include "mongo/db/logical_clock.h"

#include "mongo/base/status.h"
#include "mongo/db/global_settings.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/db/time_proof_service.h"
#include "mongo/db/vector_clock.h"
#include "mongo/logv2/log.h"

namespace mongo {

namespace {
const auto getLogicalClock = ServiceContext::declareDecoration<std::unique_ptr<LogicalClock>>();
}  // namespace

LogicalTime LogicalClock::getClusterTimeForReplicaSet(ServiceContext* svcCtx) {
    if (getGlobalReplSettings().usingReplSets()) {
        return get(svcCtx)->getClusterTime();
    }

    return {};
}

LogicalTime LogicalClock::getClusterTimeForReplicaSet(OperationContext* opCtx) {
    return getClusterTimeForReplicaSet(opCtx->getClient()->getServiceContext());
}

LogicalClock* LogicalClock::get(ServiceContext* service) {
    return getLogicalClock(service).get();
}

LogicalClock* LogicalClock::get(OperationContext* ctx) {
    return get(ctx->getClient()->getServiceContext());
}

void LogicalClock::set(ServiceContext* service, std::unique_ptr<LogicalClock> clockArg) {
    auto& clock = getLogicalClock(service);
    clock = std::move(clockArg);
}

LogicalClock::LogicalClock(ServiceContext* service) : _service(service) {}

LogicalTime LogicalClock::getClusterTime() {
    return VectorClock::get(_service)->getTime()[VectorClock::Component::ClusterTime];
}

}  // namespace mongo