-- |

module Hum.Modes.ExMode where

import           Brick.Widgets.Edit      hiding ( decodeUtf8 )
import           Brick.Types
import           Brick.Main
import           Hum.Types
import           Hum.Views
import           Hum.Utils
import           Hum.Rebuild
import           Graphics.Vty.Input.Events
import qualified Data.Text.Zipper              as Z
                                         hiding ( textZipper )
import           Control.Lens hiding (uncons)
import qualified Network.MPD                   as MPD

exEnd :: HState -> EventM Name (Next HState)
exEnd s =
    let searched = (s ^. exL . exEditorL . editContentsL & Z.currentLine)
        s'= s & exL . exEditorL .~ editorText ExEditor (Just 1) ""
              & modeL .~ NormalMode
              & focusL . focExL .~ False
    in
          case s ^. exL . exPrefixL of
            Cmd -> exCmdExecute (words searched) (s' & exL . cmdHistoryL %~ (searched :) )
            srch -> case hview s' of
                QueueView     -> continue =<< queueSearch (srch == FSearch) s''
                LibraryView   -> continue =<< librarySearch (srch == FSearch) s''
                PlaylistsView -> continue =<< playlistsSearch (srch == FSearch) s''
                HelpView      -> continue s'
                where s''= s' & exL . searchHistoryL %~ (searched :)
handleExEvent
    :: HState -> BrickEvent Name HumEvent -> EventM Name (Next HState)
handleExEvent s e = case e of
    VtyEvent (EvKey KEnter []) -> exEnd s
    VtyEvent vtye ->
        continue =<< handleEventLensed s (exL . exEditorL) handleEditorEvent vtye
    _ -> continue s

exPrefixTxt :: ExSubMode -> Text
exPrefixTxt Cmd = ":"
exPrefixTxt FSearch= "/"
exPrefixTxt BSearch = "?"

exCmdExecute :: [Text] -> HState -> EventM Name (Next HState)
exCmdExecute ("help":_) s = continue s { hview = HelpView }
exCmdExecute ("q":_) s = halt s
exCmdExecute ("save":name) s = do
  let songs = queue s
  let name' = maybe "unnamed" fst (uncons name)
  _ <- liftIO $ MPD.withMPD $ saveListToPl songs name'
  continue =<< rebuildPl s
exCmdExecute _ s = continue s