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#include "uci.hpp"
#include "board/board.hpp"
#include "board/fen.hpp"
#include "bot.hpp"
#include "moves.hpp"
#include <algorithm>
#include <cassert>
#include <cctype>
#include <cstdint>
#include <cstdio>
#include <iostream>
#include <print>
#include <sstream>
#include <string>
#include <chrono>
#include <fstream>
#include <iomanip>
#include <unordered_map>
std::ofstream uciLog("cache/uci_log.txt", std::ios::app);
bool LoadTable(
const std::string &filename,
std::unordered_map<uint64_t, TranspositionsEntry> *transpositions) {
std::ifstream file(filename);
if (!file.is_open())
return false;
uint64_t hash;
int depth;
float eval;
while (file >> hash >> depth >> eval) {
transpositions->operator[](hash) = {depth, eval};
}
return true;
}
void SaveTranspositionTable(
const std::unordered_map<uint64_t, TranspositionsEntry> &table) {
std::ofstream file("cache/positions.txt", std::ios::trunc);
for (const auto &[key, value] : table) {
file << key << ' ' << value.depth << ' ' << value.Eval << '\n';
}
};
void LogUci(const std::string &message) {
if (!uciLog.is_open()) {
return;
}
auto now = std::chrono::system_clock::now();
auto time = std::chrono::system_clock::to_time_t(now);
uciLog << "[" << std::put_time(std::localtime(&time), "%H:%M:%S") << "] "
<< message << "\n";
uciLog.flush();
}
using namespace std;
Move UciToMove(string uci) {
Position from;
Position to;
from.file = uci[0] - 'a';
from.rank = '8' - uci[1];
to.file = uci[2] - 'a';
to.rank = '8' - uci[3];
return {from, to};
}
Game initBoard(
string startingFEN,
std::unordered_map<uint64_t, TranspositionsEntry> *transPositions) {
Game b{};
b.enPassant = IndexToPosition(0); // default value
b.canEnpassant = false;
b.state = TURN;
b.turn = true;
b.halfMoveClock = 0;
b.MoveClock = 0;
b.Transpositions = transPositions;
Piece EmptyPiece = {
false,
NONEPIECE,
};
for (int i = 0; i < 64; i++) {
b.pieces[i] = EmptyPiece;
};
setBoardFen(startingFEN, &b);
return b;
};
void Uci() {
unordered_map<uint64_t, TranspositionsEntry> transpositions = {};
Game game =
initBoard("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
&transpositions);
string line;
while (getline(cin, line)) {
string cmd = line;
LogUci("GUI -> ENGINE: " + line);
transform(cmd.begin(), cmd.end(), cmd.begin(), ::tolower);
if (cmd == "quit") {
break;
}
if (cmd == "save") {
SaveTranspositionTable(transpositions);
cout << "done\n";
cout.flush();
}
if (cmd == "board") {
for (int i = 0; i < 64; i++) {
Piece piece = game.pieces[i];
if (piece.type == NONEPIECE) {
cout << " --- ";
continue;
}
printf(" %d%d", piece.type, piece.color);
if (i % 8 == 0) {
println();
}
}
cout.flush();
}
if (cmd == "load") {
LoadTable("cache/positions.txt", &transpositions);
cout << "done\n";
cout.flush();
}
if (cmd == "uci") {
cout << "uciok\n";
cout.flush();
} else if (cmd == "ucinewgame") {
game =
initBoard("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
&transpositions);
} else if (cmd == "isready") {
cout << "readyok\n";
cout.flush();
} else if (cmd.starts_with("go")) {
stringstream ss(line);
string token;
int depth = 4; // default depth
ss >> token; // go
while (ss >> token) {
if (token == "depth") {
ss >> depth;
break;
}
}
Move best = EngineGetBestMove(&game, depth);
cout << "bestmove ";
cout << (char)(best.From.file + 'a') << 8 - best.From.rank
<< (char)(best.To.file + 'a') << 8 - best.To.rank;
if (best.promotion != NONEPIECE) {
switch (best.promotion) {
case QUEEN:
cout << "q";
break;
case ROOK:
cout << "r";
break;
case KNIGHT:
cout << "n";
break;
case BISHOP:
cout << "b";
break;
default:
assert(false && "Unexpected promotion type");
}
}
cout << "\n";
cout.flush();
} else if (cmd.starts_with("position")) {
stringstream ss(line);
string token;
ss >> token; // position
ss >> token;
if (token == "startpos") {
game = initBoard(
"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
&transpositions);
} else if (token == "fen") {
string fen;
string part;
// FEN has spaces, need 6 parts
for (int i = 0; i < 6; i++) {
ss >> part;
if (i)
fen += " ";
fen += part;
}
game = initBoard(fen, &transpositions);
}
// check for moves
while (ss >> token) {
if (token == "moves")
break;
}
while (ss >> token) {
Move move = UciToMove(token);
MakeMove(move, &game);
}
}
}
}
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