/**
 *    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.
 */

#include "mongo/platform/basic.h"

#include "mongo/s/stale_exception.h"

#include "mongo/base/init.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace {

MONGO_INIT_REGISTER_ERROR_EXTRA_INFO(StaleConfigInfo);
MONGO_INIT_REGISTER_ERROR_EXTRA_INFO(StaleDbRoutingVersion);

boost::optional<ChunkVersion> extractOptionalChunkVersion(const BSONObj& obj, StringData field) {
    auto swChunkVersion = ChunkVersion::parseLegacyWithField(obj, field);
    if (swChunkVersion == ErrorCodes::NoSuchKey)
        return boost::none;
    return uassertStatusOK(std::move(swChunkVersion));
}

boost::optional<ShardId> extractOptionalShardId(const BSONObj& obj, StringData field) {
    const auto shardIdElem = obj[field];
    if (shardIdElem.eoo()) {
        return boost::none;
    }

    const auto shardId = shardIdElem.String();
    if (shardId == "") {
        return boost::none;
    }
    return ShardId(shardId);
}

}  // namespace

StaleConfigInfo::StaleConfigInfo(NamespaceString nss,
                                 ChunkVersion received,
                                 boost::optional<ChunkVersion> wanted,
                                 boost::optional<ShardId> shardId,
                                 std::shared_ptr<Notification<void>> criticalSectionSignal)
    : _nss(std::move(nss)),
      _received(received),
      _wanted(wanted),
      _shardId(shardId),
      _criticalSectionSignal(criticalSectionSignal) {}

void StaleConfigInfo::serialize(BSONObjBuilder* bob) const {
    bob->append("ns", _nss.ns());
    _received.appendLegacyWithField(bob, "vReceived");
    if (_wanted) {
        _wanted->appendLegacyWithField(bob, "vWanted");
    }
    if (_shardId) {
        bob->append("shardId", _shardId->toString());
    }
}

std::shared_ptr<const ErrorExtraInfo> StaleConfigInfo::parse(const BSONObj& obj) {
    return std::make_shared<StaleConfigInfo>(parseFromCommandError(obj));
}

StaleConfigInfo StaleConfigInfo::parseFromCommandError(const BSONObj& obj) {
    return StaleConfigInfo(NamespaceString(obj["ns"].String()),
                           uassertStatusOK(ChunkVersion::parseLegacyWithField(obj, "vReceived")),
                           extractOptionalChunkVersion(obj, "vWanted"),
                           extractOptionalShardId(obj, "shardId"));
}

void StaleDbRoutingVersion::serialize(BSONObjBuilder* bob) const {
    bob->append("db", _db);
    bob->append("vReceived", _received.toBSON());
    if (_wanted) {
        bob->append("vWanted", _wanted->toBSON());
    }
}

std::shared_ptr<const ErrorExtraInfo> StaleDbRoutingVersion::parse(const BSONObj& obj) {
    return std::make_shared<StaleDbRoutingVersion>(parseFromCommandError(obj));
}

StaleDbRoutingVersion StaleDbRoutingVersion::parseFromCommandError(const BSONObj& obj) {
    return StaleDbRoutingVersion(
        obj["db"].String(),
        DatabaseVersion::parse(IDLParserErrorContext("StaleDbRoutingVersion-vReceived"),
                               obj["vReceived"].Obj()),
        !obj["vWanted"].eoo()
            ? DatabaseVersion::parse(IDLParserErrorContext("StaleDbRoutingVersion-vWanted"),
                                     obj["vWanted"].Obj())
            : boost::optional<DatabaseVersion>{});
}

}  // namespace mongo