{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE TypeSynonymInstances #-}

{-# OPTIONS_GHC -fno-warn-orphans  #-}

module IHaskell.Display.Widgets.Box.VBox
  ( -- * The VBox widget
    VBox
    -- * Constructor
  , mkVBox
  ) where

-- To keep `cabal repl` happy when running from the ihaskell repo
import           Prelude

import           Data.Aeson
import           Data.IORef (newIORef)

import           IHaskell.Display
import           IHaskell.Eval.Widgets
import           IHaskell.IPython.Message.UUID as U

import           IHaskell.Display.Widgets.Types
import           IHaskell.Display.Widgets.Layout.LayoutWidget

-- | A 'VBox' represents a VBox widget from IPython.html.widgets.
type VBox = IPythonWidget 'VBoxType

-- | Create a new VBox
mkVBox :: IO VBox
mkVBox :: IO VBox
mkVBox = do
  -- Default properties, with a random uuid
  UUID
wid <- IO UUID
U.random
  IPythonWidget 'LayoutType
layout <- IO (IPythonWidget 'LayoutType)
mkLayout

  let widgetState :: WidgetState 'VBoxType
widgetState = forall (w :: WidgetType).
Rec Attr (WidgetFields w) -> WidgetState w
WidgetState forall a b. (a -> b) -> a -> b
$ FieldType 'ViewName
-> FieldType 'ModelName
-> IPythonWidget 'LayoutType
-> Rec Attr BoxClass
defaultBoxWidget Text
"VBoxView" Text
"VBoxModel" IPythonWidget 'LayoutType
layout

  IORef (WidgetState 'VBoxType)
stateIO <- forall a. a -> IO (IORef a)
newIORef WidgetState 'VBoxType
widgetState

  let vbox :: VBox
vbox = forall (w :: WidgetType).
UUID -> IORef (WidgetState w) -> IPythonWidget w
IPythonWidget UUID
wid IORef (WidgetState 'VBoxType)
stateIO

  -- Open a comm for this widget, and store it in the kernel state
  forall a. IHaskellWidget a => a -> Value -> IO ()
widgetSendOpen VBox
vbox forall a b. (a -> b) -> a -> b
$ forall a. ToJSON a => a -> Value
toJSON WidgetState 'VBoxType
widgetState

  -- Return the widget
  forall (m :: * -> *) a. Monad m => a -> m a
return VBox
vbox

instance IHaskellWidget VBox where
  getCommUUID :: VBox -> UUID
getCommUUID = forall (w :: WidgetType). IPythonWidget w -> UUID
uuid