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|
module InterpUtils where
import GenUtils
import DataTypes
import Data.Array -- 1.3
findCastleKMove brd = (castleK,makeACastleK brd)
findCastleQMove brd = (castleQ,makeACastleQ brd)
findAPawnMove
:: ExBoardPos
-> ExBoardPos
-> Maybe Piece
-> Board
-> (String,Board)
findAPawnMove move_src move_dest queen brd@(Board arr mv _)
= debug (move_txt,new_brd)
where
move_colour = getMoveColour mv
debug = {- trace (
{- userFormat brd ++ -}
userFormat (getMoveColour mv) ++
-- " (" ++ userFormat absmove ++ ")" ++
"\nALL :" ++ unwords (map userFormat all_moves) ++
"\n") -} id
correct_src = concat (map (getAllMovesFor brd) currPieces)
currPieces =
[ (Pawn,x,y) |
(x,y) <- start_range,
r <- [arr ! (x,y)],
lookupSquare move_colour r == Friendly,
(Just Pawn) <- [getSquarePiece r]]
start_range
= case (move_src,move_dest) of
((Just f,Just r),_) -> [(f,r)]
((Just f,_),_) -> [(f,r) | r <- [2..7]]
-- no capture !
(_,(Just f,_)) -> [(f,r) | r <- [2..7]]
_ -> error "strange pawn move:"
the_correct_move = if (length correct_move /= 1)
then error ("\nAmbiguous move:"
++ show (unwords (map userFormat correct_move))
++ ":" ++ {- userFormat absmove ++ -} "\n"
++ userFormat brd)
else head correct_move
correct_move =
filter (sameQueening queen.extractSpecialFromPlayMove)
(filter (compExBPandBP move_dest.extractDestFromPlayMove)
correct_src)
sameQueening (Just p) (Queening p') = p == p'
sameQueening Nothing (Queening p') = Queen == p'
sameQueening _ _ = True
move_txt = createShortMove the_correct_move "" brd
corr_txt =
userFormatBoardPos
(extractSrcFromPlayMove the_correct_move) ++
userFormatBoardPos
(extractDestFromPlayMove the_correct_move)
{- queening ?? -}
new_brd = makeAMove brd the_correct_move
findAMove
:: Piece
-> ExBoardPos
-> ExBoardPos
-> Board
-> (String,Board)
findAMove move_piece move_src move_dest brd@(Board arr mv _)
= debug (move_txt,new_brd)
where
move_colour = getMoveColour mv
debug = {- trace (
{- userFormat brd ++ -}
userFormat (getMoveColour mv) ++
" (" ++ {- userFormat absmove ++ -} ")" ++
"\nALL :" ++ unwords (map userFormat all_moves) ++
"\nDEST :" ++ unwords (map userFormat correct_dest) ++
"\nSRC :" ++ unwords (map userFormat correct_move) ++
"\n") -} id
all_moves = allValidMoves brd move_piece (const True)
correct_dest = filter
(compExBPandBP move_dest.extractDestFromPlayMove)
all_moves
correct_move = filter
(compExBPandBP move_src.extractSrcFromPlayMove)
correct_dest
the_correct_move = if (length correct_move /= 1)
then error ("\nAmbiguous move:"
++ show (unwords (map userFormat correct_move))
++ ":" {- ++ userFormat absmove -} ++ "\n"
++ userFormat brd)
else head correct_move
disamb = case move_dest of
(Just _,Nothing) -> "" -- fg => fxg4, no disambig.
_ -> disAmb
(extractSrcFromPlayMove the_correct_move)
(map (extractSrcFromPlayMove) correct_dest)
move_txt = createShortMove the_correct_move disamb brd
corr_txt =
userFormatBoardPos
(extractSrcFromPlayMove the_correct_move) ++
userFormatBoardPos
(extractDestFromPlayMove the_correct_move)
{- queening -}
new_brd = makeAMove brd the_correct_move
--partain: findAMove _ _ _ brd = error ("strange move: ")
allValidMoves :: Board -> Piece -> (ChessFile -> Bool) -> [PlayMove]
allValidMoves brd piece corr_file
= concat (map (getAllMovesFor brd) (getCurrPieces brd piece corr_file))
getCurrPieces
:: Board
-> Piece
-> (ChessFile -> Bool)
-> [(Piece,ChessFile,ChessRank)]
getCurrPieces (Board arr (MoveNumber _ col) _) pc corr_file =
[ (p,x,y) |
((x,y), r) <- assocs arr,
lookupSquare col r == Friendly,
(Just p) <- [getSquarePiece r],
p == pc,
corr_file x
]
getAllMovesFor :: Board -> (Piece,Int,Int) -> [PlayMove]
getAllMovesFor brd (Rook,x,y) =
[ mkPlayMove Rook (x,y) (x',y')
| (x',y') <- (
movePiece 0 1 brd x y ++
movePiece 0 (-1) brd x y ++
movePiece 1 0 brd x y ++
movePiece (-1) 0 brd x y) ]
getAllMovesFor brd (Bishop,x,y) =
[ mkPlayMove Bishop (x,y) (x',y')
| (x',y') <- (
movePiece 1 1 brd x y ++
movePiece 1 (-1) brd x y ++
movePiece (-1) 1 brd x y ++
movePiece (-1) (-1) brd x y) ]
getAllMovesFor brd (Queen,x,y) =
[ mkPlayMove Queen (x,y) (x',y')
| (x',y') <- (
movePiece 0 1 brd x y ++
movePiece 0 (-1) brd x y ++
movePiece 1 0 brd x y ++
movePiece (-1) 0 brd x y ++
movePiece 1 1 brd x y ++
movePiece 1 (-1) brd x y ++
movePiece (-1) 1 brd x y ++
movePiece (-1) (-1) brd x y) ]
getAllMovesFor brd (Knight,x,y) =
[ mkPlayMove Knight (x,y) (x',y')
| (xd,yd) <- concat
[ [(d1,d2 * 2),(d1 * 2,d2)]
| d1 <- [1,-1], d2 <- [1,-1]],
x' <- [xd + x],
y' <- [yd + y],
case lookupBoard brd (x',y') of
Vacant -> True
Friendly -> False
Baddy -> True
OffBoard -> False]
getAllMovesFor brd (King,x,y) =
[ mkPlayMove King (x,y) (x',y')
| (xd,yd) <- [(1,1),(1,0),(1,-1),(0,1),
(0,-1),(-1,1),(-1,0),(-1,-1)],
x' <- [xd + x],
y' <- [yd + y],
case lookupBoard brd (x',y') of
Vacant -> True
Friendly -> False
Baddy -> True
OffBoard -> False]
getAllMovesFor brd@(Board _ (MoveNumber _ col) may_ep) (Pawn,x,y)
= real_pawn_moves
where
pawn_moves =
case lookupBoard brd (x,y+del) of
Friendly -> []
Baddy -> []
Vacant -> (mkPlayMove Pawn (x,y) (x,y+del) :
if y /= sta then [] else
case lookupBoard brd (x,y+del*2) of
Friendly -> []
Baddy -> []
Vacant ->
[ PlayMove Pawn (x,y) (x,y+del*2) BigPawnMove])
left_pc = case lookupBoard brd (x-1,y+del) of
Baddy -> [mkPlayMove Pawn (x,y) (x-1,y+del) ]
_ -> []
right_pc = case lookupBoard brd (x+1,y+del) of
Baddy -> [mkPlayMove Pawn (x,y) (x+1,y+del) ]
_ -> []
all_pawn_moves = pawn_moves ++ left_pc ++ right_pc
real_pawn_moves = en_passant ++
(if y + del == qn -- if can queens
then concat [ let fn = PlayMove Pawn f t . Queening
in
[ fn Queen,
fn Rook,
fn Bishop,
fn Knight ]
| PlayMove _ f t _ <- all_pawn_moves ]
else all_pawn_moves)
en_passant =
case (y == ep,may_ep) of
(True,Just f) | f == x+1 || f == x-1
-> [PlayMove Pawn (x,y) (f,y+del) EnPassant]
_ -> []
del,sta,qn,ep :: Int
(del,sta,qn,ep) -- delta (direction), start, Queening and E.P. Rank
= case col of
White -> (1,2,8,5)
Black -> (-1,7,1,4)
movePiece xd yd brd x y =
case lookupBoard brd (x',y') of
OffBoard -> []
Friendly -> []
Baddy -> [(x',y')]
Vacant -> (x',y') : movePiece xd yd brd x' y'
where
x' = x + xd
y' = y + yd
makeAMove :: Board -> PlayMove -> Board
makeAMove board@(Board brd mv@(MoveNumber _ col) _)
move@(PlayMove piece pos pos' NothingSpecial) =
Board (brd // [ pos =: VacantSq,
pos' =: mkColBoardSq col piece ])
(incMove mv) Nothing
makeAMove board@(Board brd mv@(MoveNumber _ col) _)
move@(PlayMove piece pos@(f,_) pos' BigPawnMove) =
Board (brd // [ pos =: VacantSq,
pos' =: mkColBoardSq col piece ])
(incMove mv) (Just f)
makeAMove board@(Board brd mv@(MoveNumber _ col) _)
move@(PlayMove piece pos@(f,_) pos' (Queening q)) =
Board (brd // [ pos =: VacantSq,
pos' =: mkColBoardSq col q])
(incMove mv) (Just f)
makeAMove board@(Board brd mv@(MoveNumber _ col) _) -- ASSERT ?
move@(PlayMove piece (f,_) (f',_) EnPassant) =
Board (brd // [ (f,st) =: VacantSq,
(f',fn) =: mkColBoardSq col Pawn,
(f',st) =: VacantSq ])
(incMove mv) Nothing
where (st,fn) = case col of
White -> (5,6)
Black -> (4,3)
makeACastleK (Board brd mv@(MoveNumber _ White) _) =
Board (brd //
[ (5,1) =: VacantSq,
(6,1) =: mkColBoardSq White Rook,
(7,1) =: mkColBoardSq White King,
(8,1) =: VacantSq ]) (incMove mv) Nothing
makeACastleK (Board brd mv@(MoveNumber _ Black) _) =
Board (brd //
[ (5,8) =: VacantSq,
(6,8) =: mkColBoardSq Black Rook,
(7,8) =: mkColBoardSq Black King,
(8,8) =: VacantSq ]) (incMove mv) Nothing
makeACastleQ (Board brd mv@(MoveNumber _ White) _) =
Board (brd //
[ (5,1) =: VacantSq,
(4,1) =: mkColBoardSq White Rook,
(3,1) =: mkColBoardSq White King,
(1,1) =: VacantSq ]) (incMove mv) Nothing
makeACastleQ (Board brd mv@(MoveNumber _ Black) _) =
Board (brd //
[ (5,8) =: VacantSq,
(4,8) =: mkColBoardSq Black Rook,
(3,8) =: mkColBoardSq Black King,
(1,8) =: VacantSq ]) (incMove mv) Nothing
disAmb _ [_] = ""
disAmb (a,b) t@[(n,m),(x,y)]
| n == x = userFormatRank b
| otherwise = userFormatFile a
disAmb src lst = error ("PANIC: cant disambiguate: " ++ show src ++ show lst)
createShortMove :: PlayMove -> String -> Board -> String
createShortMove (PlayMove Pawn (f,r) dest q) "" brd =
(if lookupBoard brd dest == Baddy || EnPassant == q
then userFormatFile f ++ "x" ++ userFormatBoardPos dest
else userFormatBoardPos dest) ++
case q of
Queening p -> "=" ++ userFormat p
_ -> ""
createShortMove (PlayMove p _ dest _) extra brd =
userFormat p ++ extra ++ capt ++ userFormatBoardPos dest
where
capt = if lookupBoard brd dest == Baddy
then "x"
else ""
getEPStart :: Colour -> ChessFile
getEPStart White = 5
getEPStart Black = 4
getEPEnd :: Colour -> ChessFile
getEPEnd White = 6
getEPEnd Black = 3
getHomeRank :: Colour -> ChessRank
getHomeRank White = 1
getHomeRank Black = 8
|
