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#include "uci.hpp"
#include "board.hpp"
#include "bot.hpp"
#include "fen.hpp"
#include "moves.hpp"
#include <algorithm>
#include <cctype>
#include <cstdint>
#include <cstdlib>
#include <iostream>
#include <print>
#include <string>
using namespace std;
bool isValidChessRank(char rank) {
if (rank >= '1' && rank <= '8') {
return true;
} else {
return false;
}
}
bool isValidChessFile(char rank) {
if (rank >= 'A' && rank <= 'H') {
return true;
} else {
return false;
}
}
static Game initBoard(string startingFEN) {
Game b;
b.enPassant = IndexToPosition(0); // default value
b.canEnpassant = false;
b.state = TURN;
b.turn = true;
b.castle = "";
b.halfMoveClock = 0;
b.MoveClock = 0;
setBoardFen(startingFEN, &b);
return b;
};
void UciInit() {
Game game =
initBoard("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
string line;
while (getline(cin, line)) {
string cmd = line;
transform(cmd.begin(), cmd.end(), cmd.begin(), ::toupper);
if (cmd == "QUIT") {
break;
}
if (cmd == "UCI") {
cout << "uciok\n";
cout.flush();
} else if (cmd == "ISREADY") {
cout << "readyok\n";
cout.flush();
} else if (cmd.starts_with("GO")) {
Move best = EngineGetBestMove(&game);
cout << "bestmove ";
cout << (char)(best.From.file + 'a')
<< 8 - best.From.rank
<< (char)(best.To.file + 'a') << 8 - best.To.rank;
println();
cout.flush();
}
}
}
int startREPL() {
Game g =
initBoard("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
Game *b = &g;
printBoard(b);
while (true) {
GetLegalMoves(b);
if (b->state == STALEMATE) {
printBoard(b);
std::println();
std::cout << "\033[1mStalemate\033[0m" << "\n";
std::println();
return 0;
}
if (b->state == DRAW) {
printBoard(b);
std::println();
std::cout << "\033[1mDraw\033[0m" << "\n";
std::println();
return 0;
}
if (b->state == WHITE_WON) {
printBoard(b);
std::cout << "\033[1mChechmate White won\033[0m" << "\n";
return 0;
}
if (b->state == BLACK_WON) {
printBoard(b);
std::cout << "\033[1mCheckmate Black won\033[0m" << "\n";
return 0;
}
if (b->state == TURN) {
if (true) {
Move move = EngineGetBestMove(b);
PlayMove(move, b);
printBoard(b);
continue;
}
}
std::cout << "> ";
std::string command;
if (!(std::cin >> command)) {
std::println();
std::cout << "Exiting...\n";
return EXIT_SUCCESS;
}
std::transform(command.begin(), command.end(), command.begin(), ::toupper);
std::cout << command << "\n";
if (command == "EXIT") {
std::println();
std::cout << "Exiting...\n";
return EXIT_SUCCESS;
}
if (command == "RESING") {
std::cout << "\033[1mOK\033[0m" << "\n";
if (b->turn) {
b->state = BLACK_WON;
} else {
b->state = WHITE_WON;
}
continue;
}
if (command == "BOARD") {
printBoard(b);
continue;
}
if (command == "MOVES" || command == "MOVE") {
auto moves = GetLegalMoves(b);
PrintMoves(moves);
continue;
}
if (command.length() != 4) {
std::cout << "Unknown Command, use EXIT to exit";
std::println();
continue;
}
if (b->state == TURN) {
if (!isValidChessFile(command[0])) {
std::cout << "ERROR: Expected valid file at first place";
std::println();
continue;
}
if (!isValidChessRank(command[1])) {
std::cout << "ERROR: Expected valid rank at second place";
std::println();
continue;
}
if (!isValidChessFile(command[2])) {
std::cout << "ERROR: Expected valid file at third place";
std::println();
continue;
}
if (!isValidChessRank(command[3])) {
std::cout << "ERROR: Expected valid rank at four place";
std::println();
continue;
}
// we know its a valid chess pos
int fromFile = command[0] - 'A';
int fromRank = '8' - command[1];
int toFile = command[2] - 'A';
int toRank = '8' - command[3];
std::cout << fromFile << "\n";
std::cout << fromRank << "\n";
std::cout << toFile << "\n";
std::cout << toRank << "\n";
Move move = {
{static_cast<uint8_t>(fromRank), static_cast<uint8_t>(fromFile)},
{static_cast<uint8_t>(toRank), static_cast<uint8_t>(toFile)}};
auto moves = GetLegalMoves(b);
if (!(std::ranges::find(moves, move) != moves.end())) {
std::cout << "Invalid move!";
std::println();
PrintMoves(moves);
continue;
}
std::println();
PlayMove(move, b);
printBoard(b);
}
}
}
void PrintMoves(const std::vector<Move> &moves) {
std::cout << "Moves (" << moves.size() << "):\n";
for (const Move &move : moves) {
std::cout << (char)((int)move.From.file + 'A') << 8 - (int)move.From.rank
<< " -> " << (char)((int)move.To.file + 'A')
<< 8 - (int)move.To.rank << "\n";
}
}
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