{-# LANGUAGE OverloadedStrings #-}

module HWProtoLobbyState where

import qualified Data.Map as Map

import qualified Data.IntSet as IntSet

import qualified Data.Foldable as Foldable

import Data.Maybe

import Data.List

import Data.Word

import Control.Monad.Reader

import qualified Data.ByteString.Char8 as B

import Control.DeepSeq

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

import CoreTypes

import Actions

import Utils

import HandlerUtils

import RoomsAndClients

answerAllTeams cl = concatMap toAnswer

    where

        clChan = sendChan cl

        toAnswer team =

            [AnswerClients [clChan] $ teamToNet team,

            AnswerClients [clChan] ["TEAM_COLOR", teamname team, teamcolor team],

            AnswerClients [clChan] ["HH_NUM", teamname team, B.pack . show $ hhnum team]]

handleCmd_lobby :: CmdHandler

handleCmd_lobby ["LIST"] = do

    (ci, irnc) <- ask

    let cl = irnc `client` ci

    rooms <- allRoomInfos

    let roomsInfoList = concatMap (roomInfo irnc) . filter (\r -> (roomProto r == clientProto cl) && not (isRestrictedJoins r))

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

    where

        roomInfo irnc room = [

                showB $ gameinprogress room,

                name room,

                showB $ playersIn room,

                showB $ length $ teams room,

                nick $ irnc `client` masterID room,

                head (Map.findWithDefault ["+gen+"] "MAP" (params room)),

                head (Map.findWithDefault ["Default"] "SCHEME" (params room)),

                head (Map.findWithDefault ["Default"] "AMMO" (params room))

                ]

handleCmd_lobby ["CHAT", msg] = do

    n <- clientNick

    s <- roomOthersChans

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

handleCmd_lobby ["CREATE_ROOM", newRoom, roomPassword]

    | illegalName newRoom = return [Warning "Illegal room name"]

    | otherwise = do

        rs <- allRoomInfos

        cl <- thisClient

        return $ if isJust $ find (\room -> newRoom == name room) rs then 

            [Warning "Room exists"]

            else

            [

                AddRoom newRoom roomPassword,

                AnswerClients [sendChan cl] ["CLIENT_FLAGS", "-r", nick cl]

            ]

handleCmd_lobby ["CREATE_ROOM", newRoom] =

    handleCmd_lobby ["CREATE_ROOM", newRoom, ""]

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

    (ci, 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 jRoomClients = map (client irnc) $ roomClients irnc jRI

    let nicks = map nick jRoomClients

    let chans = map sendChan (cl : jRoomClients)

    return $

        if isNothing maybeRI then 

            [Warning "No such rooms"]

            else if isRestrictedJoins jRoom then

            [Warning "Joining restricted"]

            else if roomPassword /= password jRoom then

            [Warning "Wrong password"]

            else

            [

                MoveToRoom jRI,

                AnswerClients [sendChan cl] $ "JOINED" : nicks,

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

            ]

            ++ (map (readynessMessage cl) jRoomClients)

            ++ (answerFullConfig cl $ params jRoom)

            ++ (answerTeams cl jRoom)

            ++ (watchRound cl jRoom)

        where

        readynessMessage cl c = AnswerClients [sendChan cl] ["CLIENT_FLAGS", if isReady c then "+r" else "-r", nick c]

        toAnswer cl (paramName, paramStrs) = AnswerClients [sendChan cl] $ "CFG" : paramName : paramStrs

        answerFullConfig cl params = map (toAnswer cl) (leftConfigPart ++ rightConfigPart)

            where

            (leftConfigPart, rightConfigPart) = partition (\(p, _) -> p /= "MAP") $ Map.toList params

        answerTeams cl jRoom = let f = if gameinprogress jRoom then teamsAtStart else teams in answerAllTeams cl $ f jRoom

        watchRound cl jRoom = if not $ gameinprogress jRoom then

                    []

                else

                    [AnswerClients [sendChan cl]  ["RUN_GAME"],

                    AnswerClients [sendChan cl] $ "EM" : toEngineMsg "e$spectate 1" : Foldable.toList (roundMsgs jRoom)]

handleCmd_lobby ["JOIN_ROOM", roomName] =

    handleCmd_lobby ["JOIN_ROOM", roomName, ""]

handleCmd_lobby ["FOLLOW", asknick] = do

    (_, rnc) <- ask

    ci <- clientByNick asknick

    let ri = clientRoom rnc $ fromJust ci

    let clRoom = room rnc ri

    if isNothing ci || ri == lobbyId then

        return []

        else

        handleCmd_lobby ["JOIN_ROOM", name clRoom]

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

    -- 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] = do

    (ci, _) <- ask

    cl <- thisClient

    banId <- clientByNick banNick

    return [BanClient 60 reason (fromJust banId) | isAdministrator cl && isJust banId && fromJust banId /= ci]

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 = case B.readInt protoNum of

                       Just (i, t) | B.null t -> fromIntegral i

                       otherwise -> 0

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", restartType] = do

    cl <- thisClient

    return [RestartServer f | let f = restartType == "FORCE", isAdministrator cl]

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