64 lines
2.1 KiB
Haskell
64 lines
2.1 KiB
Haskell
{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE FlexibleContexts #-}
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module Hanafuda.Player where
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import Hanafuda (Card, Pack, contains, packOfCards, remove)
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import qualified Hanafuda.ID as Hanafuda (ID)
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import Data.Map ((!), Map, elemAt, insert, keys, size)
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import qualified Data.Map as Map (fromList, toList)
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import Control.Monad.IO.Class (MonadIO(..))
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import Control.Monad.Except (MonadError(..))
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import System.Random (Random(..))
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type ID yakus = Hanafuda.ID (Player yakus)
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data Player yakus = Player {
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hand :: Pack
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, meld :: Pack
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, yakus :: yakus
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} deriving (Show)
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newtype Players yakus = Players (Map (ID yakus) (Player yakus)) deriving (Show)
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new :: Monoid yakus => Player yakus
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new = Player {
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hand = packOfCards []
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, meld = packOfCards []
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, yakus = mempty
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}
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players :: Monoid yakus => [ID yakus] -> Players yakus
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players = Players . Map.fromList . fmap (\playerID -> (playerID, new))
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random :: MonadIO m => Players yakus -> m (ID yakus)
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random (Players playersByID) =
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fst . ($ playersByID) . elemAt <$> randomIndex
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where
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randomIndex = liftIO $ randomRIO (0, size playersByID - 1)
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get :: (ID yakus) -> Players yakus -> Player yakus
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get playerID (Players playersByID) = playersByID ! playerID
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set :: (ID yakus) -> Player yakus -> Players yakus -> Players yakus
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set playerID player (Players playersByID) = Players $ insert playerID player playersByID
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deal :: Monoid yakus => Players yakus -> [[Card]] -> Players yakus
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deal (Players playersByID) hands =
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Players . Map.fromList . zipWith setHand hands $ Map.toList playersByID
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where
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setHand cards (playerID, player) =
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(playerID, player {hand = packOfCards cards})
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plays :: MonadError String m => Player yakus -> Card -> m (Player yakus)
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plays player@(Player {hand}) card =
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if hand `contains` card
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then return $ player {hand = remove hand card}
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else throwError "You don't have this card"
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type Points = Int
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type Scores yakus = Map (ID yakus) Points
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score :: (yakus -> Points) -> Player yakus -> Points
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score rater = rater . yakus
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scores :: Players yakus -> [Points] -> Scores yakus
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scores (Players playersByKey) = Map.fromList . zip (keys playersByKey)
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