{-

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 \-}

{-# LANGUAGE OverloadedStrings #-}

module HWProtoLobbyState where

import Data.Maybe

import Data.List

import Control.Monad

import Control.Monad.Reader

import qualified Data.ByteString.Char8 as B

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

import CoreTypes

import Utils

import Consts

import HandlerUtils

import RoomsAndClients

import EngineInteraction

import CommandHelp

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 ((/=) 0 . roomProto)

    return $ if hasAskedList cl then [] else

        [ ModifyClient (\c -> c{hasAskedList = True})

        , 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! A room name must be between 1-40 characters long, must not have a trailing or leading space and must not have any of these characters: $()*+?[]^{|}"]

    | otherwise = do

        rs <- allRoomInfos

        cl <- thisClient

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

            [Warning $ loc "A room with the same name already 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

    let clTeams =

            if (clientProto cl >= 48) && (isJust $ gameInfo jRoom) && isRegistered cl then

                filter (\t -> teamowner t == nick cl) . teamsAtStart . fromJust $ gameInfo jRoom 

                else

                []

    let clTeamsNames = map teamname clTeams

    return $

        if isNothing maybeRI && clientProto cl < 60 && B.isPrefixOf "[v" roomName then

            [Warning $ loc "Room version incompatible to your Hedgewars version!"]

            else if isNothing maybeRI then

            [Warning $ loc "No such room."]

            else if (not sameProto) && (not $ isAdministrator cl) then

            [Warning $ loc "Room version incompatible to your Hedgewars version!"]

            else if isRestrictedJoins jRoom && not (hasSuperPower cl) then

            [Warning $ loc "Access denied. This room currently doesn't allow joining."]

            else if isRegisteredOnly jRoom && (not $ isRegistered cl) && not (isAdministrator cl) then

            [Warning $ loc "Access denied. This room is for registered users only."]

            else if isBanned then

            [Warning $ loc "You are banned from this room."]

            else if roomPassword /= password jRoom  && not (hasSuperPower cl) then

            [NoticeMessage WrongPassword]

            else

            (

                MoveToRoom jRI

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

                                        , teamsInGame = fromIntegral $ length clTeams

                                        , clientClan = teamcolor `fmap` listToMaybe clTeams})

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

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

            )

            ++ [ModifyRoom (\r -> let (t', g') = moveTeams clTeamsNames . fromJust $ gameInfo r in r{gameInfo = Just g', teams = t'}) | not $ null clTeams]

            ++ [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", nickGreeting, greeting jRoom] | greeting jRoom /= ""]

            ++ map (\t -> AnswerClients chans ["EM", toEngineMsg $ 'G' `B.cons` t]) clTeamsNames

            ++ [AnswerClients [sendChan cl] ["EM", toEngineMsg "I"] | isPaused `fmap` gameInfo jRoom == Just True]

        where

        moveTeams :: [B.ByteString] -> GameInfo -> ([TeamInfo], GameInfo)

        moveTeams cts g = (deleteFirstsBy2 (\a b -> teamname a == b) (teamsAtStart g) (leftTeams g \\ cts)

            , g{leftTeams = leftTeams g \\ cts, rejoinedTeams = rejoinedTeams g ++ cts, teamsInGameNumber = teamsInGameNumber g + length cts})

        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]

handleCmd_lobby ["HELP"] = do

    cl <- thisClient

    if isAdministrator cl then

        return (cmdHelpActionList [sendChan cl] cmdHelpLobbyAdmin)

    else

        return (cmdHelpActionList [sendChan cl] cmdHelpLobbyPlayer)

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

    -- Administrator's stuff --

handleCmd_lobby ["KICK", kickNick] = serverAdminOnly $ do

    (ci, _) <- ask

    kickId <- clientByNick kickNick

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

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

    (ci, _) <- ask

    banId <- clientByNick banNick

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

handleCmd_lobby ["BANIP", ip, reason, duration] = serverAdminOnly $

    return [BanIP ip (readInt_ duration) reason]

handleCmd_lobby ["BANNICK", n, reason, duration] = serverAdminOnly $

    return [BanNick n (readInt_ duration) reason]

handleCmd_lobby ["BANLIST"] = serverAdminOnly $

    return [BanList]

handleCmd_lobby ["UNBAN", entry] = serverAdminOnly $

    return [Unban entry]

handleCmd_lobby ["SET_SERVER_VAR", "MOTD_NEW", newMessage] = serverAdminOnly $

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

handleCmd_lobby ["SET_SERVER_VAR", "MOTD_OLD", newMessage] = serverAdminOnly $

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

handleCmd_lobby ["SET_SERVER_VAR", "LATEST_PROTO", protoNum] = serverAdminOnly $

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

    where

        readNum = readInt_ protoNum

handleCmd_lobby ["GET_SERVER_VAR"] = serverAdminOnly $

    return [SendServerVars]

handleCmd_lobby ["CLEAR_ACCOUNTS_CACHE"] = serverAdminOnly $

    return [ClearAccountsCache]

handleCmd_lobby ["RESTART_SERVER", "YES"] = serverAdminOnly $

    return [RestartServer]

handleCmd_lobby ["RESTART_SERVER"] = serverAdminOnly $

    return [Warning $ loc "Please confirm server restart with '/restart_server yes'."]

handleCmd_lobby ["RESTART_SERVER", _] = handleCmd_lobby ["RESTART_SERVER"]

handleCmd_lobby ["STATS"] = serverAdminOnly $

    return [Stats]

handleCmd_lobby (s:_) = return [ProtocolError $ "Incorrect command '" `B.append` s `B.append` "' (state: in lobby)"]

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