--------------------------------------------------------------------------------
-- | Common internal DBus functions

module XMonad.Internal.DBus.Common
  -- ( callMethod
  -- , callMethod'
  ( addMatchCallback
  , xmonadBus
  , xmonadBusName
  , xDbusDep
  -- , initControls
  ) where

import           DBus
import           DBus.Client

import           XMonad.Internal.Dependency

xmonadBusName :: BusName
xmonadBusName = busName_ "org.xmonad"

xmonadBus :: Bus
xmonadBus = Bus False xmonadBusName

xDbusDep :: ObjectPath -> InterfaceName -> DBusMember -> Dependency
xDbusDep o i m = DBusEndpoint xmonadBus $ Endpoint o i m

-- -- | Call a method and return its result if successful
-- callMethod :: MethodCall -> IO (Maybe [Variant])
-- callMethod mc = do
--   client <- connectSession
--   r <- callMethod' client (Just xmonadBusName) mc
--   disconnect client
--   return r

-- callMethod' :: Client -> Maybe BusName -> MethodCall -> IO (Maybe [Variant])
-- callMethod' client bn mc = do
--   -- TODO handle clienterrors here
--   reply <- call client mc { methodCallDestination = bn }
--   -- TODO not all methods warrant that we wait for a reply? (see callNoReply)
--   return $ case reply of
--     Left _    -> Nothing
--     Right ret -> Just $ methodReturnBody ret

-- | Bind a callback to a signal match rule
addMatchCallback :: MatchRule -> ([Variant] -> IO ()) -> IO SignalHandler
addMatchCallback rule cb = do
  client <- connectSession
  addMatch client rule $ cb . signalBody