HTicTacToe-0.1: GameState.hs

{-
    The MIT License
    
    Copyright (c) 2010 Korcan Hussein
    
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
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-}
{-# LANGUAGE FlexibleContexts #-}
module GameState where
import System.Random

import Control.Monad.State
import Control.Monad.Reader

import Graphics.UI.SDL (Surface)
import Graphics.UI.SDL.Rect
import Graphics.UI.SDL.TTF (Font)

import Surface hiding (isInside)
import qualified Surface (isInside)

import Grid

data PlayerTurn = Player | Ai
    deriving (Eq, Show, Read)

type TileType = Cell

data Stats = Stats {
    playerCount :: Integer,
    aiCount     :: Integer,
    tieCount    :: Integer
} deriving (Eq, Show)

data AppData = AppData {
    --gameState   :: GameState,
    --tiles       :: [Tile],
    grid     :: Grid,
    stats    :: Stats,
    turn     :: PlayerTurn,
    acRand   :: StdGen,
    --gameOver :: Bool,
    winner   :: (Winner, [(Int,Int)])
}

data AppConfig = AppConfig {
    screen      :: Surface,
    font        :: Font,
    oSurface    :: Surface,
    xSurface    :: Surface,
    oWinSurf    :: Surface,
    xWinSurf    :: Surface,
    gridBounds  :: Rect,
    playerStart :: PlayerTurn,
    playerType  :: TileType
}

-- Player Cross
appData :: Int -> PlayerTurn -> AppData
appData seed t = AppData newGrid (Stats 0 0 0) t (mkStdGen seed) (Nobody,[])

getTurn :: MonadState AppData m => m PlayerTurn
getTurn = liftM turn get

putTurn :: MonadState AppData m => PlayerTurn -> m ()
putTurn t = modify $ \s -> s { turn = t }

modifyTurn :: MonadState AppData m => (PlayerTurn -> PlayerTurn) -> m ()
modifyTurn fn = fn `liftM` getTurn >>= putTurn

modifyTurnM :: MonadState AppData m => (PlayerTurn -> m PlayerTurn) -> m ()
modifyTurnM act = getTurn >>= act >>= putTurn

getStats :: MonadState AppData m => m Stats
getStats = liftM stats get

putStats :: MonadState AppData m => Stats -> m ()
putStats t = modify $ \s -> s { stats = t }

modifyStats :: MonadState AppData m => (Stats -> Stats) -> m ()
modifyStats fn = fn `liftM` getStats >>= putStats

modifyStatsM :: MonadState AppData m => (Stats -> m Stats) -> m ()
modifyStatsM act = getStats >>= act >>= putStats

getRGen :: MonadState AppData m => m StdGen
getRGen = liftM acRand get

putRGen :: MonadState AppData m => StdGen -> m ()
putRGen t = modify $ \s -> s { acRand = t }

modifyRGen :: MonadState AppData m => (StdGen -> StdGen) -> m ()
modifyRGen fn = fn `liftM` getRGen >>= putRGen

modifyRGenM :: MonadState AppData m => (StdGen -> m StdGen) -> m ()
modifyRGenM act = getRGen >>= act >>= putRGen

-- utility function to hide plumbing of random generator types.
rand :: MonadState AppData m => Int -> Int -> m Int
rand lo hi = do
    r <- getRGen
    let (val, r') = randomR (lo, hi) r
    putRGen r'
    return val

getGrid :: MonadState AppData m => m Grid
getGrid = liftM grid get

putGrid :: MonadState AppData m => Grid -> m ()
putGrid t = modify $ \s -> s { grid = t }

modifyGrid :: MonadState AppData m => (Grid -> Grid) -> m ()
modifyGrid fn = fn `liftM` getGrid >>= putGrid

modifyGridM :: MonadState AppData m => (Grid -> m Grid) -> m ()
modifyGridM act = getGrid >>= act >>= putGrid

isGameOver :: MonadState AppData m => m Bool
isGameOver = liftM (gameOver . fst . winner) get
 where gameOver Nobody = False
       gameOver _      = True

getWinner :: MonadState AppData m => m (Winner, [(Int,Int)])
getWinner = liftM winner get

putWinner :: MonadState AppData m => (Winner, [(Int,Int)]) -> m ()
putWinner t = modify $ \s -> s { winner = t }

getScreen :: MonadReader AppConfig m => m Surface
getScreen = liftM screen ask

getFont :: MonadReader AppConfig m => m Font
getFont = liftM font ask

getNought :: MonadReader AppConfig m => m Surface
getNought = liftM oSurface ask

getCross :: MonadReader AppConfig m => m Surface
getCross = liftM xSurface ask

getXWinSurf :: MonadReader AppConfig m => m Surface
getXWinSurf = liftM xWinSurf ask

getOWinSurf :: MonadReader AppConfig m => m Surface
getOWinSurf = liftM oWinSurf ask

getPlayerType :: MonadReader AppConfig m => m TileType
getPlayerType = liftM playerType ask

getPlayerStart :: MonadReader AppConfig m => m PlayerTurn
getPlayerStart = liftM playerStart ask

getGridBounds :: MonadReader AppConfig m => m Rect
getGridBounds = liftM gridBounds ask

inGridBounds :: MonadReader AppConfig m => Int -> Int -> m Bool
inGridBounds x y = getGridBounds >>= \r -> return $ Surface.isInside r x y

nextTurn :: MonadState AppData m => m ()
nextTurn = modifyTurn k
 where k Player = Ai
       k Ai = Player

toTileType :: MonadReader AppConfig m => PlayerTurn -> m TileType
toTileType Player = getPlayerType
toTileType Ai = swapCell `liftM` getPlayerType