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module View.Income.Header
  ( view
  , HeaderIn(..)
  ) where

import           Control.Monad.IO.Class (liftIO)
import qualified Data.Maybe             as Maybe
import qualified Data.Text              as T
import qualified Data.Time.Clock        as Clock
import           Reflex.Dom             (MonadWidget)
import qualified Reflex.Dom             as R

import           Common.Model           (Income (..), Init (..), User (..))
import qualified Common.Model           as CM
import qualified Common.Msg             as Msg
import qualified Common.View.Format     as Format
import qualified Util.Date              as DateUtil

data HeaderIn = HeaderIn
  { _headerIn_init :: Init
  }

view :: forall t m. MonadWidget t m => HeaderIn -> m ()
view headerIn =
  R.divClass "withMargin" $ do

    currentTime <- liftIO Clock.getCurrentTime

    Maybe.fromMaybe R.blank $
      flip fmap useIncomesFrom $ \since ->
        R.el "div" $ do

          R.el "h1" $ do
            day <- liftIO $ DateUtil.utcToLocalDay since
            R.text $ Msg.get (Msg.Income_CumulativeSince (Format.longDay day))

          R.el "ul" $
            flip mapM_ (_init_users init) $ \user ->
              R.el "li" $
                R.text $ do
                  let incomes = filter ((==) (_user_id user) . _income_userId) (_init_incomes init)
                  T.intercalate " "
                    [ _user_name user
                    , "−"
                    , Format.price (_init_currency init) $
                      CM.cumulativeIncomesSince currentTime since incomes
                    ]

    R.divClass "titleButton" $
      R.el "h1" $
        R.text $
          Msg.get Msg.Income_MonthlyNet

  where
    init = _headerIn_init headerIn

    useIncomesFrom = CM.useIncomesFrom
      (map _user_id $_init_users init)
      (_init_incomes init)
      (_init_payments init)