// move.h

#ifndef MOVE_H
#define MOVE_H

// includes

#include "board.h"
#include "util.h"

// constants

const int MoveNone = 0;
const int MoveNull = 11;
const int MoveNormal = 0 << 14;
const int MoveCastle = 1 << 14;
const int MovePromote = 2 << 14;
const int MoveEnPassant = 3 << 14;
const int MoveFlags = 3 << 14;
const int MovePromoteKnight = MovePromote | (0 << 12);
const int MovePromoteBishop = MovePromote | (1 << 12);
const int MovePromoteRook = MovePromote | (2 << 12);
const int MovePromoteQueen = MovePromote | (3 << 12);
const int MovePromoteFlags = MovePromoteKnight | MovePromoteBishop | MovePromoteRook | MovePromoteQueen;
const int MoveAllFlags = 0xF << 12;
const char NullMoveString [] = "null";

// macros

#define MOVE_MAKE(from,to)             ((SQUARE_TO_64(from)<<6)|SQUARE_TO_64(to))
#define MOVE_MAKE_FLAGS(from,to,flags) ((SQUARE_TO_64(from)<<6)|SQUARE_TO_64(to)|(flags))
#define MOVE_FROM(move)                (SQUARE_FROM_64(((move)>>6)&077))
#define MOVE_TO(move)                  (SQUARE_FROM_64((move)&077))
#define MOVE_IS_SPECIAL(move)          (((move)&MoveFlags)!=MoveNormal)
#define MOVE_IS_PROMOTE(move)          (((move)&MoveFlags)==MovePromote)
#define MOVE_IS_EN_PASSANT(move)       (((move)&MoveFlags)==MoveEnPassant)
#define MOVE_IS_CASTLE(move)           (((move)&MoveFlags)==MoveCastle)

#define MOVE_PIECE(move,board)         ((board)->square[MOVE_FROM(move)])

// types

typedef uint16 mv_t;

// functions

extern bool move_is_ok( int move );
extern int move_promote( int move );
extern int move_order( int move );
extern bool move_is_capture( int move, const board_t *board );
extern bool move_is_under_promote( int move );
extern bool move_is_tactical( int move, const board_t *board );
extern int move_capture( int move, const board_t *board );
extern bool move_to_string( int move, char string [], int size );
extern int move_from_string( const char string [], const board_t *board );

#endif // !defined MOVE_H

// end of move.h
