/**
 *    Copyright (C) 2020-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/db/s/collection_sharding_state_factory_standalone.h"

namespace mongo {
namespace {

class UnshardedCollection : public ScopedCollectionDescription::Impl {
public:
    UnshardedCollection() = default;

    const CollectionMetadata& get() override {
        return _metadata;
    }

private:
    CollectionMetadata _metadata;
};

const auto kUnshardedCollection = std::make_shared<UnshardedCollection>();

class CollectionShardingStateStandalone final : public CollectionShardingState {
public:
    CollectionShardingStateStandalone(const NamespaceString& nss) : _nss(nss) {}

    const NamespaceString& nss() const override {
        return _nss;
    }

    ScopedCollectionDescription getCollectionDescription(OperationContext* opCtx) const override {
        return {kUnshardedCollection};
    }

    ScopedCollectionDescription getCollectionDescription(OperationContext* opCtx,
                                                         bool operationIsVersioned) const override {
        return {kUnshardedCollection};
    }

    ScopedCollectionFilter getOwnershipFilter(OperationContext*,
                                              OrphanCleanupPolicy orphanCleanupPolicy,
                                              bool supportNonVersionedOperations) const override {
        return {kUnshardedCollection};
    }

    boost::optional<CollectionIndexes> getCollectionIndexes(
        OperationContext* opCtx) const override {
        return boost::none;
    }

    boost::optional<ShardingIndexesCatalogCache> getIndexes(
        OperationContext* opCtx) const override {
        return boost::none;
    }

    ScopedCollectionFilter getOwnershipFilter(
        OperationContext*,
        OrphanCleanupPolicy orphanCleanupPolicy,
        const ShardVersion& receivedShardVersion) const override {
        return {kUnshardedCollection};
    }

    void checkShardVersionOrThrow(OperationContext*) const override {}

    void checkShardVersionOrThrow(OperationContext*, const ShardVersion&) const override {}

    void appendShardVersion(BSONObjBuilder* builder) const override {}

private:
    const NamespaceString& _nss;
};

}  // namespace

CollectionShardingStateFactoryStandalone::CollectionShardingStateFactoryStandalone(
    ServiceContext* serviceContext)
    : CollectionShardingStateFactory(serviceContext) {}

void CollectionShardingStateFactoryStandalone::join() {}

std::unique_ptr<CollectionShardingState> CollectionShardingStateFactoryStandalone::make(
    const NamespaceString& nss) {
    return std::make_unique<CollectionShardingStateStandalone>(nss);
}

}  // namespace mongo