chess.hpp

#ifndef CHESS_H
#define CHESS_H

#include <utility>
#include <cstring>
#include <list>

enum ChessPiece {
	PIECE_EMPTY,
	PIECE_WPAWN,
	PIECE_WROOK,
	PIECE_WKNIGHT,
	PIECE_WBISHOP,
	PIECE_WQUEEN,
	PIECE_WKING,
	PIECE_BPAWN,
	PIECE_BROOK,
	PIECE_BKNIGHT,
	PIECE_BBISHOP,
	PIECE_BQUEEN,
	PIECE_BKING
};

//TODO: Maybe get rid of these?
typedef std::pair<int,int> pii;
typedef std::pair<pii,pii> ppii;


//TODO: implement 3fold rep
class Board {
	private:
		void gen_trymoves(std::list<ppii> & moves) const;
		void cull_illegal_moves(std::list<ppii> & moves) const;
		void shift_piece(pii s, pii e, ChessPiece promote = PIECE_EMPTY);
		int enpassant; //En passant file
		bool castling[2][3]; //have the king/rooks moved?
		int n_boring_turns; //How many halfturns since a capture or pawn move

	public:
		Board();
		~Board();
		ChessPiece grid[8][8]; //a1 - [0][0], a8 = [0][7]
		int turn;

		bool is_attacked(pii sq) const;
		void gen_moves(std::list<ppii> & legal_moves) const;
		int query_state() const;
		void print() const;

		bool move(pii starting_square, pii ending_square, ChessPiece promotion=PIECE_EMPTY);
};



class Chess {
	public:
		Board board;
		std::list<Board> history;
		Chess();
		~Chess();

		bool move(pii starting_square, pii ending_square,ChessPiece promotion=PIECE_EMPTY);
		bool move(char * str);
		void undo();
		int query_state() const;

		void print() const;
};

#endif //CHESS_H