module HWProtoInRoomState where

import qualified Data.Foldable as Foldable

import qualified Data.IntMap as IntMap

import qualified Data.Map as Map

import Data.Sequence(Seq, (|>), (><), fromList, empty)

import Data.List

import Maybe

import qualified Codec.Binary.UTF8.String as UTF8

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

import CoreTypes

import Actions

import Utils

handleCmd_inRoom :: CmdHandler

handleCmd_inRoom clID clients _ ["CHAT", msg] =

    [AnswerOthersInRoom ["CHAT", clientNick, msg]]

    where

        clientNick = nick $ clients IntMap.! clID

handleCmd_inRoom clID clients _ ["TEAM_CHAT", msg] =

    [AnswerOthersInRoom ["TEAM_CHAT", clientNick, msg]]

    where

        clientNick = nick $ clients IntMap.! clID

handleCmd_inRoom clID clients rooms ["PART"] =

    [RoomRemoveThisClient "part"]

    where

        client = clients IntMap.! clID

handleCmd_inRoom clID clients rooms ("CFG" : paramName : paramStrs)

    | null paramStrs = [ProtocolError "Empty config entry"]

    | isMaster client =

        [ModifyRoom (\r -> r{params = Map.insert paramName paramStrs (params r)}),

        AnswerOthersInRoom ("CFG" : paramName : paramStrs)]

    | otherwise = [ProtocolError "Not room master"]

    where

        client = clients IntMap.! clID

handleCmd_inRoom clID clients rooms ("ADD_TEAM" : name : color : grave : fort : voicepack : flag : difStr : hhsInfo)

    | length hhsInfo == 15 && clientProto client < 30 = handleCmd_inRoom clID clients rooms ("ADD_TEAM" : name : color : grave : fort : voicepack : " " : flag : difStr : hhsInfo)

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

    | length (teams room) == 6 = [Warning "too many teams"]

    | canAddNumber <= 0 = [Warning "too many hedgehogs"]

    | isJust findTeam = [Warning "There's already a team with same name in the list"]

    | gameinprogress room = [Warning "round in progress"]

    | isRestrictedTeams room = [Warning "restricted"]

    | otherwise =

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

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

        AnswerThisClient ["TEAM_ACCEPTED", name],

        AnswerOthersInRoom $ teamToNet (clientProto client) newTeam,

        AnswerOthersInRoom ["TEAM_COLOR", name, color]

        ]

    where

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

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

        findTeam = find (\t -> name == teamname t) $ teams room

        newTeam = (TeamInfo clID (nick client) name color grave fort voicepack flag difficulty newTeamHHNum (hhsList hhsInfo))

        difficulty = fromMaybe 0 (maybeRead difStr :: Maybe Int)

        hhsList [] = []

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

        newTeamHHNum = min 4 canAddNumber

handleCmd_inRoom clID clients rooms ["REMOVE_TEAM", teamName]

    | noSuchTeam = [Warning "REMOVE_TEAM: no such team"]

    | nick client /= teamowner team = [ProtocolError "Not team owner!"]

    | otherwise =

            [RemoveTeam teamName,

            ModifyClient (\c -> c{teamsInGame = teamsInGame c - 1, clientClan = if teamsInGame client == 1 then undefined else anotherTeamClan})

            ]

    where

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

        noSuchTeam = isNothing findTeam

        team = fromJust findTeam

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

        anotherTeamClan = teamcolor $ fromJust $ find (\t -> teamownerId t == clID) $ teams room

handleCmd_inRoom clID clients rooms ["HH_NUM", teamName, numberStr]

    | not $ isMaster client = [ProtocolError "Not room master"]

    | hhNumber < 1 || hhNumber > 8 || noSuchTeam || hhNumber > (canAddNumber + (hhnum team)) = []

    | otherwise =

        [ModifyRoom $ modifyTeam team{hhnum = hhNumber},

        AnswerOthersInRoom ["HH_NUM", teamName, show hhNumber]]

    where

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

        hhNumber = fromMaybe 0 (maybeRead numberStr :: Maybe Int)

        noSuchTeam = isNothing findTeam

        team = fromJust findTeam

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

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

handleCmd_inRoom clID clients rooms ["TEAM_COLOR", teamName, newColor]

    | not $ isMaster client = [ProtocolError "Not room master"]

    | noSuchTeam = []

    | otherwise = [ModifyRoom $ modifyTeam team{teamcolor = newColor},

            AnswerOthersInRoom ["TEAM_COLOR", teamName, newColor],

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

    where

        noSuchTeam = isNothing findTeam

        team = fromJust findTeam

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

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

handleCmd_inRoom clID clients rooms ["TOGGLE_READY"] =

    [ModifyClient (\c -> c{isReady = not $ isReady client}),

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

    AnswerThisRoom [if isReady client then "NOT_READY" else "READY", nick client]]

    where

        client = clients IntMap.! clID

handleCmd_inRoom clID clients rooms ["START_GAME"] =

    if isMaster client && (playersIn room == readyPlayers room) && (not . gameinprogress) room then

        if enoughClans then

            [ModifyRoom

                    (\r -> r{

                        gameinprogress = True,

                        roundMsgs = empty,

                        leftTeams = [],

                        teamsAtStart = teams r}

                    ),

            AnswerThisRoom ["RUN_GAME"]]

        else

            [Warning "Less than two clans!"]

    else

        []

    where

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

        enoughClans = not $ null $ drop 1 $ group $ map teamcolor $ teams room

handleCmd_inRoom clID clients rooms ["EM", msg] =

    if (teamsInGame client > 0) && isLegal then

        (AnswerOthersInRoom ["EM", msg]) : [ModifyRoom (\r -> r{roundMsgs = roundMsgs r |> msg}) | not isKeepAlive]

    else

        []

    where

        client = clients IntMap.! clID

        (isLegal, isKeepAlive) = checkNetCmd msg

handleCmd_inRoom clID clients rooms ["ROUNDFINISHED"] =

    if isMaster client then

        [ModifyRoom

                (\r -> r{

                    gameinprogress = False,

                    readyPlayers = 0,

                    roundMsgs = empty,

                    leftTeams = [],

                    teamsAtStart = []}

                ),

        UnreadyRoomClients

        ] ++ answerRemovedTeams

    else

        []

    where

        client = clients IntMap.! clID

        room = rooms IntMap.! (roomID client)

        answerRemovedTeams = map (\t -> AnswerThisRoom ["REMOVE_TEAM", t]) $ leftTeams room

handleCmd_inRoom clID clients _ ["TOGGLE_RESTRICT_JOINS"]

    | isMaster client = [ModifyRoom (\r -> r{isRestrictedJoins = not $ isRestrictedJoins r})]

    | otherwise = [ProtocolError "Not room master"]

    where

        client = clients IntMap.! clID

handleCmd_inRoom clID clients _ ["TOGGLE_RESTRICT_TEAMS"]

    | isMaster client = [ModifyRoom (\r -> r{isRestrictedTeams = not $ isRestrictedTeams r})]

    | otherwise = [ProtocolError "Not room master"]

    where

        client = clients IntMap.! clID

handleCmd_inRoom clID clients rooms ["KICK", kickNick] =

    [KickRoomClient kickID | isMaster client && not noSuchClient && (kickID /= clID) && (roomID client == roomID kickClient)]

    where

        client = clients IntMap.! clID

        maybeClient = Foldable.find (\cl -> kickNick == nick cl) clients

        noSuchClient = isNothing maybeClient

        kickClient = fromJust maybeClient

        kickID = clientUID kickClient

handleCmd_inRoom clID clients _ ["TEAMCHAT", msg] =

    if (teamsInGame client > 0) then

        [AnswerSameClan ["EM", engineMsg]]

    else

        []

    where

        client = clients IntMap.! clID

        -- FIXME: why are those decoded* function used? 

        -- it would be better to use ByteString instead of String

        engineMsg = toEngineMsg $ 'b' : (decodedNick ++ "(team): " ++ decodedMsg ++ "\x20\x20")

        decodedMsg = UTF8.decodeString msg

        decodedNick = UTF8.decodeString $ nick client

handleCmd_inRoom clID _ _ _ = [ProtocolError "Incorrect command (state: in room)"]