module Runners where
import Brick.Widgets.FileBrowser
import DeckHandling
import Data.Maybe (fromMaybe)
import Recents
import Lens.Micro.Platform
import Settings
import States
import Types
import qualified Brick.Widgets.List as L
import qualified Data.Vector as Vec
import qualified Stack as S

cardSelectorState :: IO State
cardSelectorState = do
  rs <- getRecents
  maxRs <- getMaxRecents
  let prettyRecents = shortenFilepaths (S.toList rs)
      options = Vec.fromList (prettyRecents ++ ["Select file from system"])
      initialState = CSS
        { _list = L.list Ordinary options 1
        , _exception = Nothing
        , _recents = rs
        , _maxRecentsToShow = maxRs }
  return $ CardSelectorState initialState

mainMenuState :: State
mainMenuState = 
  let options = Vec.fromList 
                  [ "Select"
                  , "Info"
                  , "Settings"
                  , "Quit" ]

      initialState = MMS (L.list Ordinary options 1) in
  MainMenuState initialState

safeHead :: [a] -> Maybe a
safeHead [] = Nothing
safeHead (x:_) = Just x

cardsState :: Bool -> FilePath -> [Card] -> IO State
cardsState doReview fp deck = do
  hints    <- getShowHints
  controls <- getShowControls

  let mFirstCard = safeHead deck
      firstCard = fromMaybe (Definition "Empty deck" "Click enter to go back.") mFirstCard
      deck' = maybe [firstCard] (const deck) mFirstCard

      initialState = 
        CS { _cards = deck'
           , _index = 0
           , _currentCard = firstCard
           , _cardState = defaultCardState firstCard
           , _nCards = length deck'
           , _showHints = hints
           , _showControls = controls
           , _reviewMode = maybe False (const doReview) mFirstCard
           , _correctCards = []
           , _popup = Nothing
           , _pathToFile = fp }
 
  return $ CardsState initialState

cardsWithOptionsState :: GlobalState -> FilePath -> [Card] -> IO State
cardsWithOptionsState gs fp cards =
  let chunked = doChunking (gs^.chunk) cards
  in doRandomization gs chunked >>= cardsState (gs^.doReview) fp

infoState :: State
infoState = InfoState ()

fileBrowserState :: IO State
fileBrowserState = do
  browser <- newFileBrowser selectNonDirectories Ordinary Nothing
  let filteredBrowser = setFileBrowserEntryFilter (Just (entryFilter False)) browser
  return $ FileBrowserState (FBS filteredBrowser Nothing [] Nothing False)

entryFilter :: Bool -> FileInfo -> Bool
entryFilter acceptHidden info = (fileExtensionMatch "txt" info || fileExtensionMatch "md" info) && (acceptHidden || 
  case fileInfoFilename info of
    ".."    -> True
    '.' : _ -> False
    _       -> True)