{-# LANGUAGE OverloadedStrings #-}

module Votes where

import Control.Monad.Reader

import Control.Monad.State

import ServerState

import qualified Data.ByteString.Char8 as B

import qualified Data.List as L

import Data.Maybe

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

import Utils

import CoreTypes

import HandlerUtils

import Actions

voted :: Bool -> Reader (ClientIndex, IRnC) [Action]

voted vote = do

    cl <- thisClient

    rm <- thisRoom

    uid <- liftM clUID thisClient

    if isNothing $ voting rm then

        return [AnswerClients [sendChan cl] ["CHAT", "[server]", loc "There's no voting going on"]]

    else if uid `L.notElem` entitledToVote (fromJust $ voting rm) then

        return []

    else if uid `L.elem` map fst (votes . fromJust $ voting rm) then

        return [AnswerClients [sendChan cl] ["CHAT", "[server]", loc "You already have voted"]]

    else

        actOnVoting . fromJust . liftM (\v -> v{votes = (uid, vote):votes v}) $ voting rm

    where

    actOnVoting :: Voting -> Reader (ClientIndex, IRnC) [Action]

    actOnVoting vt = do

        let (contra, pro) = L.partition snd $ votes vt

        let v = (length $ entitledToVote vt) `div` 2 + 1

        if length contra >= v then

            closeVoting

        else if length pro >= v then do

            act $ voteType vt

            closeVoting

        else

            return [ModifyRoom $ \r -> r{voting = Just vt}]

    closeVoting = do

        chans <- roomClientsChans

        return [

            AnswerClients chans ["CHAT", "[server]", loc "Voting closed"]

            , ModifyRoom (\r -> r{voting = Nothing})

            ]

    act (VoteKick nickname) = do

        (thisClientId, rnc) <- ask

        maybeClientId <- clientByNick nickname

        rm <- thisRoom

        let kickId = fromJust maybeClientId

        let kickCl = rnc `client` kickId

        let sameRoom = clientRoom rnc thisClientId == clientRoom rnc kickId

        return

            [KickRoomClient kickId |

                isJust maybeClientId

                && sameRoom

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

            ]

startVote :: VoteType -> Reader (ClientIndex, IRnC) [Action]

startVote vt = do

    (ci, rnc) <- ask

    cl <- thisClient

    rm <- thisRoom

    chans <- roomClientsChans

    let uids = map (clUID . client rnc) . roomClients rnc $ clientRoom rnc ci

    if isJust $ voting rm then

        return []

    else

        liftM ([ModifyRoom (\r -> r{voting = Just (newVoting vt){entitledToVote = uids}})

        , AnswerClients chans ["CHAT", "[server]", B.concat [loc "New voting started", ": ", voteInfo vt]]

        ] ++ ) $ voted True

checkVotes :: StateT ServerState IO ()

checkVotes = undefined

voteInfo :: VoteType -> B.ByteString

voteInfo (VoteKick n) = B.concat [loc "kick", " ", n]