{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ExtendedDefaultRules #-}
{-# LANGUAGE NamedFieldPuns #-}


module Nomyx.Core.Mail where

import Prelude hiding (div, (.))
import Language.Haskell.HsColour.Colourise hiding (string)
import qualified Language.Haskell.HsColour.HTML as HSC
import Text.Blaze.Html5 hiding (map, label, br)
import qualified Text.Blaze.Html5 as H
import Text.Blaze.Html.Renderer.String
import Network.Mail.Mime hiding (mailTo)
import Safe
import Data.List
import Data.Text(Text, pack)
import Data.Maybe
import qualified Data.Text.Lazy as B
import Control.Concurrent
import Control.Category
import Control.Applicative ((<$>))
import Control.Monad
import Language.Nomyx
import Nomyx.Core.Profile
import Nomyx.Core.Types
import Nomyx.Core.Utils
import Nomyx.Core.Engine


default (Integer, Double, Data.Text.Text)


sendMail :: String -> String -> String -> String-> IO()
sendMail to object htmlBody textBody = do
   putStrLn $ "sending a mail to " ++ to
   forkIO $ simpleMail (Address Nothing (pack to))
                       (Address (Just "Nomyx Game") "kau@nomyx.net")
                       (pack object)
                       (B.pack htmlBody)
                       (B.pack textBody)
                       [] >>= renderSendMail
   putStrLn "done"


newRuleHtmlBody :: PlayerName -> SubmitRule -> PlayerName -> Network -> Html
newRuleHtmlBody playerName (SubmitRule name desc code) prop net = docTypeHtml $ do
   (toHtml $ "Dear " ++ playerName ++ ",") >> H.br
   (toHtml $ "a new rule has been proposed by player " ++ prop ++ ".") >> H.br
   (toHtml $ "Name: " ++ name) >> H.br
   (toHtml $ "Description: " ++ desc) >> H.br
   (toHtml $ "Code: ") >> H.br >> (preEscapedToHtml $ HSC.hscolour defaultColourPrefs False code) >> H.br >> H.br
   (toHtml $ "Please login into Nomyx for actions on this rule:") >> H.br
   (toHtml $ nomyxURL net ++ "/Nomyx") >> H.br >> H.br
   (toHtml $ "You received this mail because you subscribed to Nomyx. To stop receiving mails, login to Nomyx with the above address, go to Settings and uncheck the corresponding box.") >> H.br

newRuleTextBody :: PlayerName -> SubmitRule -> PlayerName -> Network -> String
newRuleTextBody playerName (SubmitRule name desc code) prop net =
   "Dear " ++ playerName ++ ",\n" ++
   "a new rule has been proposed by player " ++ prop ++ ".\n" ++
   "Name: " ++ name ++ "\n" ++
   "Description: " ++ desc ++ "\n" ++
   "Code: \n" ++ code ++ "\n\n" ++
   "Please login into Nomyx for actions on this rule:\n" ++
   nomyxURL net ++ "/Nomyx\n\n" ++
   "You received this mail because you subscribed to Nomyx. To stop receiving mails, login to Nomyx with the above address, go to Settings and uncheck the corresponding box.\n"


newRuleObject :: PlayerName -> String
newRuleObject name = "[Nomyx] New rule posted by player " ++ name ++ "!"

sendMailsNewRule :: Session -> SubmitRule -> PlayerNumber -> IO ()
sendMailsNewRule s sr pn = when (_sendMails $ _mSettings $ _multi s) $ do
   putStrLn "Sending mails"
   gi <- fromJustNote "sendMailsNewRule" <$> getPlayersGame pn s
   guard (_isPublic gi)
   let sendMailsTo = delete pn (map _playerNumber (_players $ _game $ _loggedGame gi))
   proposer <- Nomyx.Core.Profile.getPlayerName pn s
   profiles <- mapM (getProfile s) sendMailsTo
   mapM_ (send proposer (_net $ _mSettings $ _multi s) sr) (_pPlayerSettings <$> catMaybes profiles)


send :: PlayerName -> Network -> SubmitRule -> PlayerSettings -> IO()
send prop net sr set = when (_mailNewRule set)
   $ sendMail (_mail set)
              (newRuleObject prop)
              (newRuleTextBody (_pPlayerName set) sr prop net)
              (renderHtml $ newRuleHtmlBody (_pPlayerName set) sr prop net)
              
mapMaybeM :: (Monad m) => (a -> m (Maybe b)) -> [a] -> m [b]
mapMaybeM f = liftM catMaybes . mapM f