46 lines
1.5 KiB
Haskell
46 lines
1.5 KiB
Haskell
{-# LANGUAGE NamedFieldPuns #-}
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module Hanafuda.KoiKoi.Round (
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deal
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, next
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) where
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import Hanafuda (Flower(Paulownia), cards, shuffle, packOfCards)
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import Hanafuda.KoiKoi.Yaku (sumYakus)
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import Hanafuda.KoiKoi.Game (Game, Mode(..), On(..), Step(..), end, stop)
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import qualified Hanafuda.Player as Player (deal, get, next, score)
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import Data.Map ((!), insert)
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import Control.Monad.IO.Class (MonadIO)
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import Control.Monad.State (runState, state)
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deal :: (MonadIO m, Ord player) => On player -> m (On player)
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deal on@(On_ {players}) = do
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((hand1, hand2, river), deck) <- runState getTriple <$> shuffle cards
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return on {
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players = Player.deal players [hand1, hand2]
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, deck
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, river = packOfCards river
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}
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where
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take8 = state $ splitAt 8
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getTriple = (,,) <$> take8 <*> take8 <*> take8
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next :: (MonadIO m, Ord player) => On player -> m (Game player)
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next on@(On_ {mode, scores, month, players, oyake, winning}) =
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case mode of
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FirstAt n | n <= newScore -> end scored
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FirstAt _ -> continue
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WholeYear | month == Paulownia -> end scored
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WholeYear -> continue
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where
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playing = Player.next players oyake
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newScore = (scores ! winning) + Player.score sumYakus (Player.get winning players)
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scored = on {scores = insert winning newScore scores}
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continue =
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deal (scored {
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month = succ month
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, playing
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, winning = playing
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, oyake = playing
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, step = ToPlay
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}) >>= stop
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