namespace {
// Only do hedging for commands that cannot trigger writes.
// Keep this list sorted.
static constexpr std::array hedgeCommands{
    "collStats"_sd,
    "count"_sd,
    "dataSize"_sd,
    "dbStats"_sd,
    "distinct"_sd,
    "filemd5"_sd,
    "find"_sd,
    "listCollections"_sd,
    "listIndexes"_sd,
    "planCacheListFilters"_sd,
};
static const bool verifySortOrderOnStartup = [] {
    invariant(std::is_sorted(hedgeCommands.begin(), hedgeCommands.end()));
    return true;
}();
bool commandCanHedge(StringData command) {
    return std::binary_search(hedgeCommands.begin(),
                              hedgeCommands.end(),
                              command);
}
}  // namespace
void extractHedgeOptions(const BSONObj& cmdObj,
                         const ReadPreferenceSetting& readPref,
                         executor::RemoteCommandRequestOnAny::Options& options) {
    const bool canHedge = [&] {
        if (gReadHedgingMode.load() != ReadHedgingMode::kOn)
            return false;  // Hedging is globally disabled.
        auto&& mode = readPref.hedgingMode;
        if (!mode || !mode->getEnabled())
            return false;  // The read preference didn't enable hedging.
        auto cmdName = cmdObj.firstElement().fieldNameStringData();
        if (!commandCanHedge(cmdName))
            return false;  // This is not a command that can hedge.
        return true;
    }();
    options.isHedgeEnabled = canHedge;
    options.hedgeCount = canHedge ? 1 : 0;
    options.maxTimeMSForHedgedReads = canHedge ? gMaxTimeMSForHedgedReads.load() : 0;
}