module Utils where

import Control.Concurrent

import Control.Concurrent.STM

import Data.Char

import Data.Word

import qualified Data.Map as Map

import qualified Data.IntMap as IntMap

import Numeric

import Network.Socket

import qualified Data.List as List

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

import qualified Codec.Binary.Base64 as Base64

import qualified Codec.Binary.UTF8.String as UTF8

import CoreTypes

sockAddr2String :: SockAddr -> IO String

sockAddr2String (SockAddrInet _ hostAddr) = inet_ntoa hostAddr

sockAddr2String (SockAddrInet6 _ _ (a, b, c, d) _) =

	return $ (foldr1 (.)

		$ List.intersperse (\a -> ':':a)

		$ concatMap (\n -> (\(a, b) -> [showHex a, showHex b]) $ divMod n 65536) [a, b, c, d]) []

toEngineMsg :: String -> String

toEngineMsg msg = Base64.encode (fromIntegral (length msg) : (UTF8.encode msg))

--tselect :: [ClientInfo] -> STM ([String], ClientInfo)

--tselect = foldl orElse retry . map (\ci -> (flip (,) ci) `fmap` readTChan (chan ci))

maybeRead :: Read a => String -> Maybe a

maybeRead s = case reads s of

	[(x, rest)] | all isSpace rest -> Just x

	_         -> Nothing

teamToNet team = [

		"ADD_TEAM",

		teamname team,

		teamgrave team,

		teamfort team,

		teamvoicepack team,

		teamowner team,

		show $ difficulty team

		]

		++ hhsInfo

	where

		hhsInfo = concatMap (\(HedgehogInfo name hat) -> [name, hat]) $ hedgehogs team

modifyTeam :: TeamInfo -> RoomInfo -> RoomInfo

modifyTeam team room = room{teams = replaceTeam team $ teams room}

	where

	replaceTeam _ [] = error "modifyTeam: no such team"

	replaceTeam team (t:teams) =

		if teamname team == teamname t then

			team : teams

		else

			t : replaceTeam team teams

protoNumber2ver :: Word16 -> String

protoNumber2ver 17 = "0.9.7-dev"

protoNumber2ver 19 = "0.9.7"

protoNumber2ver 20 = "0.9.8-dev"

protoNumber2ver 21 = "0.9.8"

protoNumber2ver 22 = "0.9.9-dev"

protoNumber2ver 23 = "0.9.9"

protoNumber2ver 24 = "0.9.10-dev"

protoNumber2ver 25 = "0.9.10"

protoNumber2ver 26 = "0.9.11-dev"

protoNumber2ver _ = "Unknown"