module HWProtoNEState where

import qualified Data.IntMap as IntMap

import Maybe

import Data.List

import Data.Word

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

import CoreTypes

import Actions

import Utils

handleCmd_NotEntered :: CmdHandler

handleCmd_NotEntered clID clients _ ["NICK", newNick]

    | not . null $ nick client = [ProtocolError "Nickname already chosen"]

    | haveSameNick = [AnswerThisClient ["WARNING", "Nickname already in use"], ByeClient ""]

    | illegalName newNick = [ByeClient "Illegal nickname"]

    | otherwise =

        ModifyClient (\c -> c{nick = newNick}) :

        AnswerThisClient ["NICK", newNick] :

        [CheckRegistered | clientProto client /= 0]

    where

        client = clients IntMap.! clID

        haveSameNick = isJust $ find (\cl -> newNick == nick cl) $ IntMap.elems clients

handleCmd_NotEntered clID clients _ ["PROTO", protoNum]

    | clientProto client > 0 = [ProtocolError "Protocol already known"]

    | parsedProto == 0 = [ProtocolError "Bad number"]

    | otherwise =

        ModifyClient (\c -> c{clientProto = parsedProto}) :

        AnswerThisClient ["PROTO", show parsedProto] :

        [CheckRegistered | (not . null) (nick client)]

    where

        client = clients IntMap.! clID

        parsedProto = fromMaybe 0 (maybeRead protoNum :: Maybe Word16)

handleCmd_NotEntered clID clients _ ["PASSWORD", passwd] =

    if passwd == webPassword client then

        [ModifyClient (\cl -> cl{logonPassed = True}),

        MoveToLobby] ++ adminNotice

    else

        [ByeClient "Authentication failed"]

    where

        client = clients IntMap.! clID

        adminNotice = [AnswerThisClient ["ADMIN_ACCESS"] | isAdministrator client]

handleCmd_NotEntered clID clients _ ["DUMP"] =

    if isAdministrator (clients IntMap.! clID) then [Dump] else []