module Main (
    main,
) where

import Control.Lens
import Control.Monad
import Control.Parallel
import qualified Data.Map.Strict as M
import Data.Preload.Render
import qualified Data.Text as T
import Dodge.Concurrent
import Dodge.Config.Load
import Dodge.Config.Update
import Dodge.Data
import Dodge.Event
import Dodge.Initialisation
import Dodge.LoadSeed
import Dodge.Menu
import Dodge.Render
import Dodge.SoundLogic.LoadSound
import Dodge.TestString
import Dodge.Update
import Graphics.Rendering.OpenGL hiding (color, rotate, scale, translate)
import qualified IntMapHelp as IM
import Loop
import Music
import Picture
import Preload
import Preload.Render
import Render
import qualified SDL
import qualified SDL.Mixer as Mix
import Sound
import System.Directory

main :: IO ()
main = do
    -- load the config to get the window size and position
    con <- loadDodgeConfig
    let sizex = floor $ _windowX con
        sizey = floor $ _windowY con
        posx = _windowPosX con
        posy = _windowPosY con
    setupConLoop
        20
        (T.pack "Simple Game Loop")
        (winConfig sizex sizey (Just (posx, posy)))
        theCleanup
        (firstWorldLoad con)
        conEffects
        theUpdateStep
        (flip handleEvent)

-- | Create an OpenGL SDL window configuration with a given x and y size.
winConfig :: Int -> Int -> Maybe (Int, Int) -> SDL.WindowConfig
winConfig x y winpos =
    SDL.defaultWindow
        { SDL.windowGraphicsContext =
            SDL.OpenGLContext $
                SDL.defaultOpenGL
                    { SDL.glProfile = SDL.Core SDL.Normal 4 3
                    , SDL.glColorPrecision = SDL.V4 8 8 8 8
                    }
        , SDL.windowPosition = theWinPos
        , SDL.windowInitialSize = SDL.V2 (fromIntegral x) (fromIntegral y)
        , SDL.windowResizable = True
        }
  where
    theWinPos = case winpos of
        Just (px, py) -> SDL.Absolute (SDL.P (SDL.V2 (fromIntegral px) (fromIntegral py)))
        Nothing -> SDL.Wherever

theCleanup :: Universe -> IO ()
theCleanup uv = SDL.cursorVisible $= True >> cleanUpPreload (_preloadData uv)

firstWorldLoad :: Configuration -> IO Universe
firstWorldLoad theConfig = do
    SDL.cursorVisible $= False
    pdata <- doPreload >>= applyWorldConfig theConfig
    --return $ startNewGame $ Universe
    cancontinue <- doesFileExist "saveSlot/0"
    mseed <- loadSeed
    return $
        Universe
            { --{_uvWorld = initialWorld
              _uvWorld = splashScreen
            , _uvConfig = theConfig
            , _preloadData = pdata
            , _uvScreenLayers = [splashMenu]
            , _uvIOEffects = return
            , _uvTestString = testStringInit
            , _uvSideEffects = mempty
            , _uvCanContinue = cancontinue
            , _uvMSeed = mseed
            }

theUpdateStep :: Universe -> IO Universe
theUpdateStep = doSideEffects <=< updateRenderSplit

updateRenderSplit :: Universe -> IO Universe
updateRenderSplit u = do
    let preData = _preloadData u
    updateUniverse u `par` void (doDrawing (_renderData preData) u)
    return $! updateUniverse u

playSoundUnlessRewinding :: Universe -> IO (M.Map SoundOrigin Sound)
playSoundUnlessRewinding u = case w ^. cWorld . timeFlow of
    NormalTimeFlow -> playSoundAndUpdate (_soundData $ _preloadData u) (_playingSounds w) (_toPlaySounds w)
    _ -> stopAllSounds >> return M.empty
  where
    w = _uvWorld u

doSideEffects :: Universe -> IO Universe
doSideEffects u = do
    let preData = _preloadData u
    newPlayingSounds <- playSoundUnlessRewinding u
    u' <- _uvIOEffects u u
    endTicks <- SDL.ticks
    let lastFrameTicks = _frameTimer preData
    when (debugOn Show_ms_frame $ _uvConfig u) $
        void $
            renderFoldable
                (_pictureShaders $ _renderData preData)
                ( setDepth (-1)
                    . translate (-0.5) (-0.8)
                    . scale 0.0005 0.0005
                    $ fpsText (endTicks - lastFrameTicks)
                )
    return $
        u'
            & preloadData . frameTimer .~ endTicks
            & uvWorld . playingSounds .~ newPlayingSounds
            & uvWorld . toPlaySounds .~ M.empty
            & uvIOEffects .~ return

fpsText :: (Show a, Ord a, Num a) => a -> Picture
fpsText x = color col $ text $ "ms/frame " ++ show x
  where
    col
        | x < 22 = blue
        | x < 30 = green
        | x < 40 = yellow
        | x < 50 = orange
        | otherwise = red

doPreload :: IO PreloadData
doPreload = do
    rData <- preloadRender
    lChunks <- loadSounds
    lMusic <- loadMusic
    Mix.playMusic Mix.Forever (lMusic IM.! 0)
    return
        PreloadData
            { _renderData = rData
            , _soundData = SoundData{_loadedChunks = lChunks}
            , _musicData = MusicData{_loadedMusic = lMusic}
            , _frameTimer = 0
            }

--checkForGlErrors :: IO ()
--checkForGlErrors = do
--    errs <- errors
--    unless (null errs) $ putStrLn $ "GLerror during doLoop: " ++ unwords (map show errs)