{-

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2014 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 HWProtoInRoomState where

import qualified Data.Map as Map

import Data.List as L

import Data.Maybe

import qualified Data.ByteString.Char8 as B

import Control.Monad

import Control.Monad.Reader

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

import CoreTypes

import Utils

import HandlerUtils

import RoomsAndClients

import EngineInteraction

import Votes

startGame :: Reader (ClientIndex, IRnC) [Action]

startGame = do

    (ci, rnc) <- ask

    cl <- thisClient

    rm <- thisRoom

    chans <- roomClientsChans

    let nicks = map (nick . client rnc) . roomClients rnc $ clientRoom rnc ci

    let allPlayersRegistered = all ((<) 0 . B.length . webPassword . client rnc . teamownerId) $ teams rm

    if (playersIn rm == readyPlayers rm || clientProto cl > 43) && not (isJust $ gameInfo rm) then

        if enoughClans rm then

            return [

                ModifyRoom

                    (\r -> r{

                        gameInfo = Just $ newGameInfo (teams rm) (length $ teams rm) allPlayersRegistered (mapParams rm) (params rm) False

                        }

                    )

                , AnswerClients chans ["RUN_GAME"]

                , SendUpdateOnThisRoom

                , AnswerClients chans $ "CLIENT_FLAGS" : "+g" : nicks

                , ModifyRoomClients (\c -> c{isInGame = True})

                ]

            else

            return [Warning $ loc "Less than two clans!"]

        else

        return []

    where

        enoughClans = not . null . drop 1 . group . map teamcolor . teams

handleCmd_inRoom :: CmdHandler

handleCmd_inRoom ["CHAT", msg] = do

    n <- clientNick

    s <- roomOthersChans

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

handleCmd_inRoom ["PART"] = return [MoveToLobby "part"]

handleCmd_inRoom ["PART", msg] = return [MoveToLobby $ "part: " `B.append` msg]

handleCmd_inRoom ("CFG" : paramName : paramStrs)

    | null paramStrs = return [ProtocolError $ loc "Empty config entry"]

    | otherwise = do

        chans <- roomOthersChans

        cl <- thisClient

        rm <- thisRoom

        if isSpecial rm then

            return [Warning $ loc "Restricted"]

        else if isMaster cl then

           return [

                ModifyRoom f,

                AnswerClients chans ("CFG" : paramName : paramStrs)]

            else

            return [ProtocolError $ loc "Not room master"]

    where

        f r = if paramName `Map.member` (mapParams r) then

                r{mapParams = Map.insert paramName (head paramStrs) (mapParams r)}

                else

                r{params = Map.insert paramName paramStrs (params r)}

handleCmd_inRoom ("ADD_TEAM" : tName : color : grave : fort : voicepack : flag : difStr : hhsInfo)

    | length hhsInfo /= 16 = return [ProtocolError $ loc "Corrupted hedgehogs info"]

    | otherwise = do

        (ci, _) <- ask

        rm <- thisRoom

        clNick <- clientNick

        clChan <- thisClientChans

        othChans <- roomOthersChans

        roomChans <- roomClientsChans

        cl <- thisClient

        teamColor <-

            if clientProto cl < 42 then

                return color

                else

                liftM (head . (L.\\) (map B.singleton ['0'..]) . map teamcolor . teams) thisRoom

        let roomTeams = teams rm

        let hhNum = let p = if not $ null roomTeams then minimum [hhnum $ head roomTeams, canAddNumber roomTeams] else 4 in newTeamHHNum roomTeams p

        let newTeam = clNick `seq` TeamInfo ci clNick tName teamColor grave fort voicepack flag dif hhNum (hhsList hhsInfo)

        return $

            if not . null . drop (maxTeams rm - 1) $ roomTeams then

                [Warning $ loc "too many teams"]

            else if canAddNumber roomTeams <= 0 then

                [Warning $ loc "too many hedgehogs"]

            else if isJust $ findTeam rm then

                [Warning $ loc "There's already a team with same name in the list"]

            else if isJust $ gameInfo rm then

                [Warning $ loc "round in progress"]

            else if isRestrictedTeams rm then

                [Warning $ loc "restricted"]

            else

                [ModifyRoom (\r -> r{teams = teams r ++ [newTeam]}),

                SendUpdateOnThisRoom,

                ModifyClient (\c -> c{teamsInGame = teamsInGame c + 1, clientClan = Just teamColor}),

                AnswerClients clChan ["TEAM_ACCEPTED", tName],

                AnswerClients othChans $ teamToNet $ newTeam,

                AnswerClients roomChans ["TEAM_COLOR", tName, teamColor],

                AnswerClients roomChans ["HH_NUM", tName, showB $ hhnum newTeam]

                ]

        where

        canAddNumber rt = (48::Int) - (sum $ map hhnum rt)

        findTeam = find (\t -> tName == teamname t) . teams

        dif = readInt_ difStr

        hhsList [] = []

        hhsList [_] = error "Hedgehogs list with odd elements number"

        hhsList (n:h:hhs) = HedgehogInfo n h : hhsList hhs

        newTeamHHNum rt p = min p (canAddNumber rt)

        maxTeams r

            | roomProto r < 38 = 6

            | otherwise = 8

handleCmd_inRoom ["REMOVE_TEAM", tName] = do

        (ci, _) <- ask

        r <- thisRoom

        let maybeTeam = findTeam r

        let team = fromJust maybeTeam

        return $

            if isNothing $ maybeTeam then

                [Warning $ loc "REMOVE_TEAM: no such team"]

            else if ci /= teamownerId team then

                [ProtocolError $ loc "Not team owner!"]

            else

                [RemoveTeam tName,

                ModifyClient

                    (\c -> c{

                        teamsInGame = teamsInGame c - 1,

                        clientClan = if teamsInGame c == 1 then Nothing else Just $ anotherTeamClan ci team r

                    })

                ]

    where

        anotherTeamClan ci team = teamcolor . fromMaybe (error "CHECKPOINT 011") . find (\t -> (teamownerId t == ci) && (t /= team)) . teams

        findTeam = find (\t -> tName == teamname t) . teams

handleCmd_inRoom ["HH_NUM", teamName, numberStr] = do

    cl <- thisClient

    r <- thisRoom

    clChan <- thisClientChans

    others <- roomOthersChans

    let maybeTeam = findTeam r

    let team = fromJust maybeTeam

    return $

        if not $ isMaster cl then

            [ProtocolError $ loc "Not room master"]

        else if isNothing maybeTeam then

            []

        else if hhNumber < 1 || hhNumber > 8 || hhNumber > canAddNumber r + hhnum team then

            [AnswerClients clChan ["HH_NUM", teamName, showB $ hhnum team]]

        else

            [ModifyRoom $ modifyTeam team{hhnum = hhNumber},

            AnswerClients others ["HH_NUM", teamName, showB hhNumber]]

    where

        hhNumber = readInt_ numberStr

        findTeam = find (\t -> teamName == teamname t) . teams

        canAddNumber = (-) 48 . sum . map hhnum . teams

handleCmd_inRoom ["TEAM_COLOR", teamName, newColor] = do

    cl <- thisClient

    others <- roomOthersChans

    r <- thisRoom

    let maybeTeam = findTeam r

    let team = fromJust maybeTeam

    return $

        if not $ isMaster cl then

            [ProtocolError $ loc "Not room master"]

        else if isNothing maybeTeam then

            []

        else

            [ModifyRoom $ modifyTeam team{teamcolor = newColor},

            AnswerClients others ["TEAM_COLOR", teamName, newColor],

            ModifyClient2 (teamownerId team) (\c -> c{clientClan = Just newColor})]

    where

        findTeam = find (\t -> teamName == teamname t) . teams

handleCmd_inRoom ["TOGGLE_READY"] = do

    cl <- thisClient

    rm <- thisRoom

    chans <- roomClientsChans

    (ci, rnc) <- ask

    let ri = clientRoom rnc ci

    let unreadyClients = filter (not . isReady) . map (client rnc) $ roomClients rnc ri

    gs <- if (not $ isReady cl) && (isSpecial rm) && (unreadyClients == [cl]) then startGame else return []

    return $

        ModifyRoom (\r -> r{readyPlayers = readyPlayers r + (if isReady cl then -1 else 1)})

        : ModifyClient (\c -> c{isReady = not $ isReady cl})

        : (AnswerClients chans $ if clientProto cl < 38 then

                [if isReady cl then "NOT_READY" else "READY", nick cl]

                else

                ["CLIENT_FLAGS", if isReady cl then "-r" else "+r", nick cl])

        : gs

handleCmd_inRoom ["START_GAME"] = roomAdminOnly startGame

handleCmd_inRoom ["EM", msg] = do

    cl <- thisClient

    rm <- thisRoom

    chans <- roomOthersChans

    if teamsInGame cl > 0 && (isJust $ gameInfo rm) && (not $ B.null legalMsgs) then

        return $ AnswerClients chans ["EM", legalMsgs]

            : [ModifyRoom (\r -> r{gameInfo = liftM

                (\g -> g{

                    roundMsgs = if B.null nonEmptyMsgs then roundMsgs g else nonEmptyMsgs : roundMsgs g

                    , lastFilteredTimedMsg = fromMaybe (lastFilteredTimedMsg g) lastFTMsg})

                $ gameInfo r}), RegisterEvent EngineMessage]

        else

        return []

    where

        (legalMsgs, nonEmptyMsgs, lastFTMsg) = checkNetCmd msg

handleCmd_inRoom ["ROUNDFINISHED", _] = do

    cl <- thisClient

    rm <- thisRoom

    chans <- roomClientsChans

    let clTeams = map teamname . filter (\t -> teamowner t == nick cl) . teams $ rm

    let unsetInGameState = [AnswerClients chans ["CLIENT_FLAGS", "-g", nick cl], ModifyClient (\c -> c{isInGame = False})]

    if isInGame cl then

        if isJust $ gameInfo rm then

            return $ unsetInGameState ++ map SendTeamRemovalMessage clTeams

            else

            return unsetInGameState

        else

        return [] -- don't accept this message twice

    where

--        isCorrect = correctly == "1"

-- compatibility with clients with protocol < 38

handleCmd_inRoom ["ROUNDFINISHED"] =

    handleCmd_inRoom ["ROUNDFINISHED", "1"]

handleCmd_inRoom ["TOGGLE_RESTRICT_JOINS"] = roomAdminOnly $

handleCmd_inRoom ["TOGGLE_RESTRICT_TEAMS"] = roomAdminOnly $

    return [ModifyRoom (\r -> r{isRestrictedTeams = not $ isRestrictedTeams r})]

handleCmd_inRoom ["TOGGLE_REGISTERED_ONLY"] = roomAdminOnly $

handleCmd_inRoom ["ROOM_NAME", newName] = roomAdminOnly $ do

    cl <- thisClient

    rs <- allRoomInfos

    rm <- thisRoom

    chans <- sameProtoChans

    return $

        if illegalName newName then

            [Warning $ loc "Illegal room name"]

        else

        if isSpecial rm then

            [Warning $ loc "Restricted"]

        else

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

            [Warning $ loc "Room with such name already exists"]

        else

            [ModifyRoom roomUpdate,

            AnswerClients chans ("ROOM" : "UPD" : name rm : roomInfo (clientProto cl) (nick cl) (roomUpdate rm))]

    where

        roomUpdate r = r{name = newName}

handleCmd_inRoom ["KICK", kickNick] = roomAdminOnly $ do

    (thisClientId, rnc) <- ask

    maybeClientId <- clientByNick kickNick

    rm <- thisRoom

    let kickId = fromJust maybeClientId

    let kickCl = rnc `client` kickId

    let sameRoom = clientRoom rnc thisClientId == clientRoom rnc kickId

    let notOnly2Players = (length . group . sort . map teamowner . teams $ rm) > 2

    return

        [KickRoomClient kickId |

            isJust maybeClientId

            && (kickId /= thisClientId)

            && sameRoom

            && ((isNothing $ gameInfo rm) || notOnly2Players || teamsInGame kickCl == 0)

        ]

handleCmd_inRoom ["DELEGATE", newAdmin] = do

    (thisClientId, rnc) <- ask

    maybeClientId <- clientByNick newAdmin

    master <- liftM isMaster thisClient

    serverAdmin <- liftM isAdministrator thisClient

    thisRoomMasterId <- liftM masterID thisRoom

    let newAdminId = fromJust maybeClientId

    let sameRoom = clientRoom rnc thisClientId == clientRoom rnc newAdminId

    return

        [ChangeMaster (Just newAdminId) |

            (master || serverAdmin)

                && isJust maybeClientId

                && (Just newAdminId /= thisRoomMasterId)

                && sameRoom]

handleCmd_inRoom ["TEAMCHAT", msg] = do

    cl <- thisClient

    chans <- roomSameClanChans

    return [AnswerClients chans ["EM", engineMsg cl]]

    where

        engineMsg cl = toEngineMsg $ B.concat ["b", nick cl, " (team): ", msg, "\x20\x20"]

handleCmd_inRoom ["BAN", banNick] = do

    (thisClientId, rnc) <- ask

    maybeClientId <- clientByNick banNick

    master <- liftM isMaster thisClient

    let banId = fromJust maybeClientId

    let sameRoom = clientRoom rnc thisClientId == clientRoom rnc banId

    if master && isJust maybeClientId && (banId /= thisClientId) && sameRoom then

        return [

--                ModifyRoom (\r -> r{roomBansList = let h = host $ rnc `client` banId in h `deepseq` h : roomBansList r})

                KickRoomClient banId

            ]

        else

        return []

handleCmd_inRoom ("RND":rs) = do

    n <- clientNick

    s <- roomClientsChans

    return [AnswerClients s ["CHAT", n, B.unwords $ "/rnd" : rs], Random s rs]

handleCmd_inRoom ["FIX"] = serverAdminOnly $

    return [ModifyRoom (\r -> r{isSpecial = True})]

handleCmd_inRoom ["UNFIX"] = serverAdminOnly $

    return [ModifyRoom (\r -> r{isSpecial = False})]

handleCmd_inRoom ["GREETING", msg] = do

    cl <- thisClient

    rm <- thisRoom

    return [ModifyRoom (\r -> r{greeting = msg}) | isAdministrator cl || (isMaster cl && (not $ isSpecial rm))]

handleCmd_inRoom ["CALLVOTE"] = do

    cl <- thisClient

    return [AnswerClients [sendChan cl] ["CHAT", "[server]", "Available callvote commands: kick <nickname>, map <name>, pause"]]

handleCmd_inRoom ["CALLVOTE", "KICK"] = do

    cl <- thisClient

    return [AnswerClients [sendChan cl] ["CHAT", "[server]", "callvote kick: specify nickname"]]

handleCmd_inRoom ["CALLVOTE", "KICK", nickname] = do

    (thisClientId, rnc) <- ask

    cl <- thisClient

    rm <- thisRoom

    maybeClientId <- clientByNick nickname

    let kickId = fromJust maybeClientId

    let sameRoom = clientRoom rnc thisClientId == clientRoom rnc kickId

    if isJust $ masterID rm then

        return []

        else

        if isJust maybeClientId && sameRoom then

            startVote $ VoteKick nickname

            else

            return [AnswerClients [sendChan cl] ["CHAT", "[server]", "callvote kick: no such user"]]

handleCmd_inRoom ["CALLVOTE", "MAP"] = do

    cl <- thisClient

    s <- liftM (Map.keys . roomSaves) thisRoom

    return [AnswerClients [sendChan cl] ["CHAT", "[server]", B.concat ["callvote map: ", B.intercalate ", " s]]]

handleCmd_inRoom ["CALLVOTE", "MAP", roomSave] = do

    cl <- thisClient

    rm <- thisRoom

    if Map.member roomSave $ roomSaves rm then

        startVote $ VoteMap roomSave

        else

        return [AnswerClients [sendChan cl] ["CHAT", "[server]", "callvote map: no such map"]]

handleCmd_inRoom ["CALLVOTE", "PAUSE"] = do

    cl <- thisClient

    rm <- thisRoom

    if isJust $ gameInfo rm then

        startVote VotePause    

        else 

        return [AnswerClients [sendChan cl] ["CHAT", "[server]", "callvote pause: no game in progress"]]

handleCmd_inRoom ["VOTE", m] = do

    cl <- thisClient

    let b = if m == "YES" then Just True else if m == "NO" then Just False else Nothing

    if isJust b then

        voted (fromJust b)

        else

        return [AnswerClients [sendChan cl] ["CHAT", "[server]", "vote: 'yes' or 'no'"]]

handleCmd_inRoom ["SAVE", stateName] = serverAdminOnly $ do

    return [ModifyRoom $ \r -> r{roomSaves = Map.insert stateName (mapParams r, params r) (roomSaves r)}]

handleCmd_inRoom ["DELETE", stateName] = serverAdminOnly $ do

    return [ModifyRoom $ \r -> r{roomSaves = Map.delete stateName (roomSaves r)}]

handleCmd_inRoom ["SAVEROOM", fileName] = serverAdminOnly $ do

    return [SaveRoom fileName]

handleCmd_inRoom ["LOADROOM", fileName] = serverAdminOnly $ do

    return [LoadRoom fileName]

handleCmd_inRoom ["LIST"] = return [] -- for old clients (<= 0.9.17)

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

handleCmd_inRoom [] = return [ProtocolError "Empty command (state: in room)"]