{-# LANGUAGE OverloadedStrings #-}

module HWProtoLobbyState where

import Data.Maybe

import Data.List

import Control.Monad.Reader

import qualified Data.ByteString.Char8 as B

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

import CoreTypes

import Utils

import HandlerUtils

import RoomsAndClients

import EngineInteraction

handleCmd_lobby :: CmdHandler

handleCmd_lobby ["LIST"] = do

    (ci, irnc) <- ask

    let cl = irnc `client` ci

    rooms <- allRoomInfos

    let roomsInfoList = concatMap (\r -> roomInfo (clientProto cl) (maybeNick . liftM (client irnc) $ masterID r) r) . filter (\r -> (roomProto r == clientProto cl))

    return [AnswerClients [sendChan cl] ("ROOMS" : roomsInfoList rooms)]

handleCmd_lobby ["CHAT", msg] = do

    n <- clientNick

    s <- roomOthersChans

    return [AnswerClients s ["CHAT", n, msg], RegisterEvent LobbyChatMessage]

handleCmd_lobby ["CREATE_ROOM", rName, roomPassword]

    | illegalName rName = return [Warning $ loc "Illegal room name"]

    | otherwise = do

        rs <- allRoomInfos

        cl <- thisClient

        return $ if isJust $ find (\r -> rName == name r) rs then

            [Warning "Room exists"]

            else

            [

                AddRoom rName roomPassword

                , AnswerClients [sendChan cl] ["CLIENT_FLAGS", "+hr", nick cl]

                , ModifyClient (\c -> c{isMaster = True, isReady = True, isJoinedMidGame = False})

                , ModifyRoom (\r -> r{readyPlayers = 1})

            ]

handleCmd_lobby ["CREATE_ROOM", rName] =

    handleCmd_lobby ["CREATE_ROOM", rName, ""]

handleCmd_lobby ["JOIN_ROOM", roomName, roomPassword] = do

    (_, irnc) <- ask

    let ris = allRooms irnc

    cl <- thisClient

    let maybeRI = find (\ri -> roomName == name (irnc `room` ri)) ris

    let jRI = fromJust maybeRI

    let jRoom = irnc `room` jRI

    let sameProto = clientProto cl == roomProto jRoom

    let jRoomClients = map (client irnc) $ roomClients irnc jRI

    let nicks = map nick jRoomClients

    let owner = find isMaster jRoomClients

    let chans = map sendChan (cl : jRoomClients)

    let isBanned = host cl `elem` roomBansList jRoom

    return $

        if isNothing maybeRI then

            [Warning $ loc "No such room"]

            else if not sameProto then

            [Warning $ loc "Room version incompatible to your hedgewars version"]

            else if isRestrictedJoins jRoom then

            [Warning $ loc "Joining restricted"]

            else if isRegisteredOnly jRoom && (B.null . webPassword $ cl) && not (isAdministrator cl) then

            [Warning $ loc "Registered users only"]

            else if isBanned then

            [Warning $ loc "You are banned in this room"]

            else if roomPassword /= password jRoom then

            [NoticeMessage WrongPassword]

            else

            (

                MoveToRoom jRI

                : ModifyClient (\c -> c{isJoinedMidGame = isJust $ gameInfo jRoom})

                : AnswerClients chans ["CLIENT_FLAGS", "-r", nick cl]

                : [(AnswerClients [sendChan cl] $ "JOINED" : nicks) | not $ null nicks]

            )

            ++ [AnswerClients [sendChan cl] ["CLIENT_FLAGS", "+h", nick $ fromJust owner] | isJust owner]

            ++ [sendStateFlags cl jRoomClients | not $ null jRoomClients]

            ++ answerFullConfig cl jRoom

            ++ answerTeams cl jRoom

            ++ watchRound cl jRoom chans

            ++ [AnswerClients [sendChan cl] ["CHAT", "[greeting]", greeting jRoom] | greeting jRoom /= ""]

        where

        sendStateFlags cl clients = AnswerClients [sendChan cl] . concat . intersperse [""] . filter (not . null) . concat $

                [f "+r" ready, f "-r" unready, f "+g" ingame, f "-g" inroomlobby]

            where

            (ready, unready) = partition isReady clients

            (ingame, inroomlobby) = partition isInGame clients

            f fl lst = ["CLIENT_FLAGS" : fl : map nick lst | not $ null lst]

        -- get config from gameInfo if possible, otherwise from room

        answerFullConfig cl jRoom = let f r g = (if isJust $ gameInfo jRoom then g . fromJust . gameInfo else r) jRoom

                                    in answerFullConfigParams cl (f mapParams giMapParams) (f params giParams)

        answerTeams cl jRoom = let f = if isJust $ gameInfo jRoom then teamsAtStart . fromJust . gameInfo else teams in answerAllTeams cl $ f jRoom

        watchRound cl jRoom chans = if isNothing $ gameInfo jRoom then

                    []

                else

                    AnswerClients [sendChan cl]  ["RUN_GAME"]

                    : AnswerClients chans ["CLIENT_FLAGS", "+g", nick cl]

                    : ModifyClient (\c -> c{isInGame = True})

                    : [AnswerClients [sendChan cl] $ "EM" : toEngineMsg "e$spectate 1" : (reverse . roundMsgs . fromJust . gameInfo $ jRoom)]

handleCmd_lobby ["JOIN_ROOM", roomName] =

    handleCmd_lobby ["JOIN_ROOM", roomName, ""]

handleCmd_lobby ["FOLLOW", asknick] = do

    (_, rnc) <- ask

    clChan <- liftM sendChan thisClient

    ci <- clientByNick asknick

    let ri = clientRoom rnc $ fromJust ci

    let roomName = name $ room rnc ri

    if isNothing ci || ri == lobbyId then

        return []

        else

        liftM ((:) (AnswerClients [clChan] ["JOINING", roomName])) $ handleCmd_lobby ["JOIN_ROOM", roomName]

handleCmd_lobby ("RND":rs) = do

    c <- liftM sendChan thisClient

    return [Random [c] rs]

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

    -- Administrator's stuff --

handleCmd_lobby ["KICK", kickNick] = do

    (ci, _) <- ask

    cl <- thisClient

    kickId <- clientByNick kickNick

    return [KickClient $ fromJust kickId | isAdministrator cl && isJust kickId && fromJust kickId /= ci]

handleCmd_lobby ["BAN", banNick, reason, duration] = do

    (ci, _) <- ask

    cl <- thisClient

    banId <- clientByNick banNick

    return [BanClient (readInt_ duration) reason (fromJust banId) | isAdministrator cl && isJust banId && fromJust banId /= ci]

handleCmd_lobby ["BANIP", ip, reason, duration] = do

    cl <- thisClient

    return [BanIP ip (readInt_ duration) reason | isAdministrator cl]

handleCmd_lobby ["BANNICK", n, reason, duration] = do

    cl <- thisClient

    return [BanNick n (readInt_ duration) reason | isAdministrator cl]

handleCmd_lobby ["BANLIST"] = do

    cl <- thisClient

    return [BanList | isAdministrator cl]

handleCmd_lobby ["UNBAN", entry] = do

    cl <- thisClient

    return [Unban entry | isAdministrator cl]

handleCmd_lobby ["SET_SERVER_VAR", "MOTD_NEW", newMessage] = do

    cl <- thisClient

    return [ModifyServerInfo (\si -> si{serverMessage = newMessage}) | isAdministrator cl]

handleCmd_lobby ["SET_SERVER_VAR", "MOTD_OLD", newMessage] = do

    cl <- thisClient

    return [ModifyServerInfo (\si -> si{serverMessageForOldVersions = newMessage}) | isAdministrator cl]

handleCmd_lobby ["SET_SERVER_VAR", "LATEST_PROTO", protoNum] = do

    cl <- thisClient

    return [ModifyServerInfo (\si -> si{latestReleaseVersion = readNum}) | isAdministrator cl && readNum > 0]

    where

        readNum = readInt_ protoNum

handleCmd_lobby ["GET_SERVER_VAR"] = do

    cl <- thisClient

    return [SendServerVars | isAdministrator cl]

handleCmd_lobby ["CLEAR_ACCOUNTS_CACHE"] = do

    cl <- thisClient

    return [ClearAccountsCache | isAdministrator cl]

handleCmd_lobby ["RESTART_SERVER"] = do

    cl <- thisClient

    return [RestartServer | isAdministrator cl]

handleCmd_lobby ["STATS"] = do

    cl <- thisClient

    return [Stats | isAdministrator cl]

handleCmd_lobby _ = return [ProtocolError "Incorrect command (state: in lobby)"]