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

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

module IHaskell.Display.Widgets.Box.SelectionContainer.Accordion
  ( -- * The Accordion widget
    Accordion
    -- * Constructor
  , mkAccordion
  ) where

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

import           Control.Monad (void)
import           Data.Aeson
import           Data.IORef (newIORef)
import qualified Data.Scientific as Sci

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

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

-- | A 'Accordion' represents a Accordion widget from IPython.html.widgets.
type Accordion = IPythonWidget 'AccordionType

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

  let widgetState :: WidgetState 'AccordionType
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 SelectionContainerClass
defaultSelectionContainerWidget Text
"AccordionView" Text
"AccordionModel" IPythonWidget 'LayoutType
layout

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

  let box :: Accordion
box = forall (w :: WidgetType).
UUID -> IORef (WidgetState w) -> IPythonWidget w
IPythonWidget UUID
wid IORef (WidgetState 'AccordionType)
stateIO

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

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

instance IHaskellWidget Accordion where
  getCommUUID :: Accordion -> UUID
getCommUUID = forall (w :: WidgetType). IPythonWidget w -> UUID
uuid
  comm :: Accordion -> Value -> (Value -> IO ()) -> IO ()
comm Accordion
widget Value
val Value -> IO ()
_ =
    case Value -> [Text] -> Maybe Value
nestedObjectLookup Value
val [Text
"state", Text
"selected_index"] of
      Just (Number Scientific
num) -> do
        forall (f :: * -> *) a. Functor f => f a -> f ()
void forall a b. (a -> b) -> a -> b
$ forall (f :: Field) (w :: WidgetType).
(f ∈ WidgetFields w, IHaskellWidget (IPythonWidget w)) =>
IPythonWidget w -> SField f -> FieldType f -> IO (Attr f)
setField' Accordion
widget forall {a :: Field}. (a ~ 'SelectedIndex) => SField a
SelectedIndex forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just (Scientific -> Integer
Sci.coefficient Scientific
num)
        forall (w :: WidgetType).
('ChangeHandler ∈ WidgetFields w) =>
IPythonWidget w -> IO ()
triggerChange Accordion
widget
      Just Value
Null -> do
        forall (f :: * -> *) a. Functor f => f a -> f ()
void forall a b. (a -> b) -> a -> b
$ forall (f :: Field) (w :: WidgetType).
(f ∈ WidgetFields w, IHaskellWidget (IPythonWidget w)) =>
IPythonWidget w -> SField f -> FieldType f -> IO (Attr f)
setField' Accordion
widget forall {a :: Field}. (a ~ 'SelectedIndex) => SField a
SelectedIndex forall a. Maybe a
Nothing
        forall (w :: WidgetType).
('ChangeHandler ∈ WidgetFields w) =>
IPythonWidget w -> IO ()
triggerChange Accordion
widget
      Maybe Value
_ -> forall (f :: * -> *) a. Applicative f => a -> f a
pure ()