{-# LANGUAGE CPP, ScopedTypeVariables, OverloadedStrings #-}

module Main where

import Network.Socket

import Network.BSD

import Control.Concurrent.Chan

import qualified Control.Exception as E

import System.Log.Logger

import System.Process

-----------------------------------

import Opts

import CoreTypes

import ServerCore

import ConfigFile

#if !defined(mingw32_HOST_OS)

import System.Posix

#endif

setupLoggers :: IO ()

setupLoggers =

    updateGlobalLogger "Clients"

        (setLevel INFO)

server :: ServerInfo -> IO ()

server si = do

    proto <- getProtocolNumber "tcp"

    E.bracket

        (socket AF_INET Stream proto)

        sClose

        (\sock -> do

            setSocketOption sock ReuseAddr 1

            bindSocket sock (SockAddrInet (listenPort si) iNADDR_ANY)

            listen sock maxListenQueue

            startServer si sock

        )

handleRestart :: ShutdownException -> IO ()

handleRestart ShutdownException = return ()

handleRestart RestartException = do

    _ <- createProcess (proc "./hedgewars-server" [])

    return ()

main :: IO ()

main = withSocketsDo $ do

#if !defined(mingw32_HOST_OS)

    _ <- installHandler sigPIPE Ignore Nothing

    _ <- installHandler sigCHLD Ignore Nothing

#endif

    setupLoggers

    dbQueriesChan <- newChan

    coreChan' <- newChan

    serverInfo' <- getOpts $ newServerInfo coreChan' dbQueriesChan Nothing

#if defined(OFFICIAL_SERVER)

    si <- readServerConfig serverInfo'

#else

    let si = serverInfo'

#endif

    (server si) `E.catch` handleRestart