module Text.Madlibs.Cata.Run (run) where
import Text.Madlibs.Internal.Types
import Text.Madlibs.Internal.Utils
import qualified Data.Text as T
import Control.Monad.Random.Class
run :: (MonadRandom m) => RandTok -> m T.Text
run tok@(List rs) = do
value <- getRandomR (0,1)
let ret = ((snd . head) . filter ((>=value) . fst)) $ mkCdf tok
case ret of
(Value txt) -> pure txt
tok@(List rs) -> run tok
run (Value txt) = pure txt
mkCdf :: RandTok -> [(Double, RandTok)]
mkCdf (List rs) = zip (cdf . (map fst) $ rs) (map snd rs)