{-# LANGUAGE RankNTypes #-}

module ConfigFile where

import Data.Maybe

import Data.TConfig

import qualified Data.ByteString.Char8 as B

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

import CoreTypes

cfgFileName :: String

cfgFileName = "hedgewars-server.ini"

readServerConfig :: ServerInfo -> IO ServerInfo

readServerConfig serverInfo' = do

    cfg <- readConfig cfgFileName

    let si = serverInfo'{

        dbHost = value "dbHost" cfg

        , dbName = value "dbName" cfg

        , dbLogin = value "dbLogin" cfg

        , dbPassword = value "dbPassword" cfg

        , serverMessage = value "sv_message" cfg

        , serverMessageForOldVersions = value "sv_messageOld" cfg

        , latestReleaseVersion = read . fromJust $ getValue "sv_latestProto" cfg

        , serverConfig = Just cfg

    }

    return si

    where

        value n c = B.pack . fromJust2 n $ getValue n c

        fromJust2 n Nothing = error $ "Missing config entry " ++ n

        fromJust2 _ (Just a) = a

writeServerConfig :: ServerInfo -> IO ()

writeServerConfig ServerInfo{serverConfig = Nothing} = return ()

writeServerConfig ServerInfo{

    dbHost = dh,

    dbName = dn,

    dbLogin = dl,

    dbPassword = dp,

    serverMessage = sm,

    serverMessageForOldVersions = smo,

    latestReleaseVersion = ver,

    serverConfig = Just cfg}

        = do

    let newCfg = foldl (\c (n, v) -> repConfig n (B.unpack v) c) cfg entries

    writeConfig cfgFileName (repConfig "sv_latestProto" (show ver) newCfg)

    where

        entries = [

            ("dbHost", dh)

            , ("dbName", dn)

            , ("dbLogin", dl)

            , ("dbPassword", dp)

            , ("sv_message", sm)

            , ("sv_messageOld", smo)

            ]