{-# LANGUAGE GeneralizedNewtypeDeriving #-}

module MainLoop ( MainState(..)
                , Main(..)
                , runMain
                ) where

import Game
import GLDriver
import Player
import Texture
import Model

import Control.Monad.State
import Control.Monad.Trans
import Data.Time
import qualified Data.Map as M


data MainState = MainState
               { run       :: !Bool
               , driver    :: !SomeDriver
               , time      :: !UTCTime
               , players   :: ![SomePlayer]
               , textures  :: !(M.Map Texture TextureObject)
               , models    :: !(M.Map Model InterleavedObj)
               , gameState :: !GameState
               }

newtype Main a = Main (StateT MainState IO a)
    deriving (Monad, MonadState MainState, MonadIO)

runMain :: MainState -> Main a -> IO (a, MainState)
runMain st (Main a) = runStateT a st