/**
 *    Copyright (C) 2022-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/platform/basic.h"

#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/db/repl/change_stream_oplog_notification.h"
#include "mongo/db/s/notify_event_gen.h"

namespace mongo {

/**
 * This command notifies an event on the shard server. The action taken is determined by the
 * event AddShard: Add an oplog entry for the new shard.
 */
class ShardsvrNotifyEventCommand : public TypedCommand<ShardsvrNotifyEventCommand> {
public:
    using Request = ShardsvrNotifyEventRequest;
    using Response = OkReply;

    bool skipApiVersionCheck() const override {
        // Internal command (server to server).
        return true;
    }

    std::string help() const override {
        return "should not be calling this directly";
    }

    AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
        return AllowedOnSecondary::kNever;
    }

    bool adminOnly() const override {
        return true;
    }

    class Invocation : public InvocationBase {
    public:
        using InvocationBase::InvocationBase;

        Response typedRun(OperationContext* opCtx) {
            opCtx->setAlwaysInterruptAtStepDownOrUp_UNSAFE();

            uassert(ErrorCodes::IllegalOperation,
                    "_shardsvrNotifyEvent can only run on shard servers",
                    serverGlobalParams.clusterRole == ClusterRole::ShardServer);

            auto shardingEvent = request().getShardingEvent();
            notifyChangeStreamsOnAddShard(
                opCtx, shardingEvent.getShardName(), shardingEvent.getShardConnectionString());

            return Response{};
        }

    private:
        bool supportsWriteConcern() const override {
            return true;
        }

        NamespaceString ns() const override {
            return {};
        }

        void doCheckAuthorization(OperationContext* opCtx) const override {
            uassert(ErrorCodes::Unauthorized,
                    "Unauthorized",
                    AuthorizationSession::get(opCtx->getClient())
                        ->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
                                                           ActionType::internal));
        }
    };

} shardsvrNotifyEventCmd;

}  // namespace mongo