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

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

module IHaskell.Display.Widgets.Box.Box
  ( -- * The Box widget
    Box
    -- * Constructor
  , mkBox
  ) 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

-- | A 'Box' represents a Box widget from IPython.html.widgets.
type Box = IPythonWidget 'BoxType

-- | Create a new box
mkBox :: IO Box
mkBox = do
  -- Default properties, with a random uuid
  wid <- U.random

  let widgetState = WidgetState $ defaultBoxWidget "BoxView" "BoxModel"

  stateIO <- newIORef widgetState

  let box = IPythonWidget wid stateIO

  -- Open a comm for this widget, and store it in the kernel state
  widgetSendOpen box $ toJSON widgetState

  -- Return the widget
  return box

instance IHaskellDisplay Box where
  display b = do
    widgetSendView b
    return $ Display []

instance IHaskellWidget Box where
  getCommUUID = uuid