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

module IHaskell.Display.Widgets.Int.BoundedInt.IntProgress (
-- * The IntProgress Widget
IntProgress, 
             -- * Constructor
             mkIntProgress) where

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

import           Control.Exception (throw, ArithException(LossOfPrecision))
import           Control.Monad (when, join)
import           Data.Aeson
import qualified Data.HashMap.Strict as HM
import           Data.IORef (newIORef)
import qualified Data.Scientific as Sci
import           Data.Text (Text)
import           Data.Vinyl (Rec(..), (<+>))

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

import           IHaskell.Display.Widgets.Types
import           IHaskell.Display.Widgets.Common

-- | 'IntProgress' represents an IntProgress widget from IPython.html.widgets.
type IntProgress = IPythonWidget IntProgressType

-- | Create a new widget
mkIntProgress :: IO IntProgress
mkIntProgress = do
  -- Default properties, with a random uuid
  uuid <- U.random

  let boundedIntAttrs = defaultBoundedIntWidget "ProgressView"
      progressAttrs = (BarStyle =:: DefaultBar) :& RNil
      widgetState = WidgetState $ boundedIntAttrs <+> progressAttrs

  stateIO <- newIORef widgetState

  let widget = IPythonWidget uuid stateIO
      initData = object
                   ["model_name" .= str "WidgetModel", "widget_class" .= str "IPython.IntProgress"]

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

  -- Return the widget
  return widget

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

instance IHaskellWidget IntProgress where
  getCommUUID = uuid