#include "types.h"

#define WHITE  0b0000
#define BLACK  0b0001

#define PAWN   0b0000
#define KNIGHT 0b0010
#define BISHOP 0b0100
#define ROOK   0b0110
#define QUEEN  0b1000
#define KING   0b1010

typedef U64 Bitboard;
#define BIT (U64)1

typedef struct {
  Bitboard pieces[12];
  BYTE side;
  BYTE castling_rights;
  BYTE en_passant_square;
} Board;

enum enumSquare {
  a1, b1, c1, d1, e1, f1, g1, h1,
  a2, b2, c2, d2, e2, f2, g2, h2,
  a3, b3, c3, d3, e3, f3, g3, h3,
  a4, b4, c4, d4, e4, f4, g4, h4,
  a5, b5, c5, d5, e5, f5, g5, h5,
  a6, b6, c6, d6, e6, f6, g6, h6,
  a7, b7, c7, d7, e7, f7, g7, h7,
  a8, b8, c8, d8, e8, f8, g8, h8
};

#define notAFile 0xFEFEFEFEFEFEFEFE
#define notBFile 0xFDFDFDFDFDFDFDFD
#define notGFile 0xBFBFBFBFBFBFBFBF
#define notHFile 0x7F7F7F7F7F7F7F7F

static const char* notation[64] = {
  "a1", "b1", "c1", "d1", "e1", "f1", "g1", "h1",
  "a2", "b2", "c2", "d2", "e2", "f2", "g2", "h2",
  "a3", "b3", "c3", "d3", "e3", "f3", "g3", "h3",
  "a4", "b4", "c4", "d4", "e4", "f4", "g4", "h4",
  "a5", "b5", "c5", "d5", "e5", "f5", "g5", "h5",
  "a6", "b6", "c6", "d6", "e6", "f6", "g6", "h6",
  "a7", "b7", "c7", "d7", "e7", "f7", "g7", "h7",
  "a8", "b8", "c8", "d8", "e8", "f8", "g8", "h8"
};

static const char* pieces[] = {
  "♟︎", "♙",
  "♞", "♘",
  "♝", "♗",
  "♜", "♖",
  "♛", "♕",
  "♚", "♔",
};

void precompute_knight_attack_table();
void precompute_king_attack_table();
void print_bitboard(Bitboard bb);
int pop_count(Bitboard bb);
void print_board(Board board);
Board parse_FEN(char* FEN);