{-# LANGUAGE OverloadedStrings, TemplateHaskell #-}

module Application.HXournal.Type.XournalState where

import Application.HXournal.Device
import Application.HXournal.Type.Event 
import Application.HXournal.Type.Enum
import Application.HXournal.Type.Canvas
import Application.HXournal.Type.Clipboard
import Application.HXournal.Type.Window 
import Application.HXournal.Type.Undo
import Data.Xournal.Map

import Graphics.Xournal.Render.BBoxMapPDF

import Control.Category
import Control.Monad.State
import Data.Xournal.Simple
import Data.Xournal.Predefined 
import Graphics.UI.Gtk hiding (Clipboard)
import Data.Maybe
import Data.Label 
import Prelude hiding ((.), id)

type XournalStateIO = StateT HXournalState IO 

data XournalState = ViewAppendState { unView :: TXournalBBoxMapPDFBuf }
                  | SelectState { tempSelect :: TTempXournalSelectPDFBuf }

data HXournalState = 
  HXournalState { _xournalstate :: XournalState
                , _currFileName :: Maybe FilePath
                , _canvasInfoMap :: CanvasInfoMap 
                , _currentCanvas :: Int
                , _frameState :: WindowConfig 
                , _rootWindow :: Widget
                , _rootContainer :: Box
                , _rootOfRootWindow :: Window
                , _currentPenDraw :: PenDraw
                , _clipboard :: Clipboard
                , _callBack ::  MyEvent -> IO ()
                , _deviceList :: DeviceList
                , _penInfo :: PenInfo
                , _selectInfo :: SelectInfo 
                , _gtkUIManager :: UIManager 
                , _isSaved :: Bool 
                , _undoTable :: UndoTable XournalState
                } 


$(mkLabels [''HXournalState]) 

emptyHXournalState :: HXournalState 
emptyHXournalState = 
  HXournalState  
  { _xournalstate = ViewAppendState emptyGXournalMap
  , _currFileName = Nothing 
  , _canvasInfoMap = error "emptyHXournalState.canvasInfoMap"
  , _currentCanvas = error "emtpyHxournalState.currentCanvas"
  , _frameState = error "emptyHXournalState.frameState" 
  , _rootWindow = error "emtpyHXournalState.rootWindow"
  , _rootContainer = error "emptyHXournalState.rootContainer"
  , _rootOfRootWindow = error "emptyHXournalState.rootOfRootWindow"
  , _currentPenDraw = emptyPenDraw 
  , _clipboard = emptyClipboard
  , _callBack = error "emtpyHxournalState.callBack"
  , _deviceList = error "emtpyHxournalState.deviceList"
  , _penInfo = PenInfo PenWork predefined_medium ColorBlack
  , _selectInfo = SelectInfo SelectRectangleWork 
  , _gtkUIManager = error "emptyHXournalState.gtkUIManager"
  , _isSaved = False 
  , _undoTable = emptyUndo 1 
  }

resetXournalStateBuffers :: XournalState -> IO XournalState 
resetXournalStateBuffers xojstate1 = 
  case xojstate1 of 
    ViewAppendState xoj -> liftIO . liftM ViewAppendState . resetXournalBuffers $ xoj
    _ -> return xojstate1