vector<string> fens, list;

string go, token;

// Assign default values to missing arguments

string ttSize = (is >> token) ? token : "16";

string threads = (is >> token) ? token : "1";

string limit = (is >> token) ? token : "13";

string fenFile = (is >> token) ? token : "default";

string limitType = (is >> token) ? token : "depth";

string evalType = (is >> token) ? token : "mixed";

go = limitType == "eval" ? "eval" : "go " + limitType + " " + limit;

if (fenFile == "default")

fens = Defaults;

else if (fenFile == "current")

fens.push_back(current.fen());

else

{

string fen;

ifstream file(fenFile);

if (!file.is_open())

{

cerr << "Unable to open file " << fenFile << endl;

exit(EXIT_FAILURE);

}

while (getline(file, fen))

if (!fen.empty())

fens.push_back(fen);

file.close();

}

list.emplace_back("setoption name Threads value " + threads);

list.emplace_back("setoption name Hash value " + ttSize);

list.emplace_back("ucinewgame");

size_t posCounter = 0;

for (const string& fen : fens)

if (fen.find("setoption") != string::npos)

list.emplace_back(fen);

else

{

if (evalType == "classical" || (evalType == "mixed" && posCounter % 2 == 0))

list.emplace_back("setoption name Use NNUE value false");

else if (evalType == "NNUE" || (evalType == "mixed" && posCounter % 2 != 0))

list.emplace_back("setoption name Use NNUE value true");

list.emplace_back("position fen " + fen);

list.emplace_back(go);

++posCounter;

}

return list;