{-# LANGUAGE PatternGuards #-}

import Game
import Level
import Tank

import GLDriver
import GLX

import Control.Concurrent (threadDelay)
import Control.Monad.State
import Data.Maybe


main :: IO ()
main = do
  gl <- initGL glxDriver
  
  let gameState = GameState {level = testLevel, tanks = [Tank 0.5 0.5 0]}
  
  runGame gameState $ mainLoop gl
  
  deinitGL gl

mainLoop :: Driver a => a -> Game ()
mainLoop gl = do
  run <- liftIO $ handleEvents gl
  liftIO $ threadDelay 10000
  when run $ mainLoop gl
  
handleEvents :: Driver a => a -> IO Bool
handleEvents gl = do
  event <- nextEvent gl
  if (isJust event)
      then
          handleEvent $ fromJust event
      else
          return True

handleEvent :: SomeEvent -> IO Bool
handleEvent ev
    | Just QuitEvent <- fromEvent ev = return False
    | otherwise                      = return True