module Component.Table
  ( view
  , In(..)
  , Out(..)
  ) where

import           Data.Text       (Text)
import           Reflex.Dom      (Dynamic, Event, MonadWidget)
import qualified Reflex.Dom      as R

import qualified Component.Pages as Pages

data In h r t = In
  { _in_headerLabel :: h -> Text
  , _in_rows        :: Dynamic t [r]
  , _in_cell        :: h -> r -> Text
  , _in_perPage     :: Int
  , _in_resetPage   :: Event t ()
  }

data Out = Out
  {}

view :: forall t m h r. (MonadWidget t m, Bounded h, Enum h)  => In h r t -> m (Out)
view input =
  R.divClass "table" $ do
    rec
      R.divClass "lines" $ do

        R.divClass "header" $
          flip mapM_ [minBound..] $ \header ->
            R.divClass "cell" . R.text $
              _in_headerLabel input header

        let rows = getRange
              (_in_perPage input)
                <$> (Pages._out_currentPage pages)
                <*> (_in_rows input)

        R.simpleList rows $ \r ->
          R.divClass "row" $
            flip mapM_ [minBound..] $ \h ->
              R.divClass "cell name" $
                R.dynText $
                  R.ffor r (_in_cell input h)

      pages <- Pages.view $ Pages.In
        { Pages._in_total = length <$> (_in_rows input)
        , Pages._in_perPage = _in_perPage input
        , Pages._in_reset = _in_resetPage input
        }

      return ()

    return $ Out
      {}

getRange :: forall a. Int -> Int -> [a] -> [a]
getRange perPage currentPage =
  take perPage . drop ((currentPage - 1) * perPage)