module Mischief.ECS.Relationships.ChildOf where

import Mischief.ECS.Components
import Mischief.ECS.Entities
import Mischief.ECS.Relationships.Graph
import Mischief.ECS.World
import Mischief.ECS.World.Query
import Mischief.ECS.World.Query.Queryable

data ChildOf = ChildOf deriving (Show)

instance Component ChildOf where
  type RelExclusivity ChildOf = Exclusive

-- parent :: forall m w. (MonadSystem w m) => Entity -> m (Maybe Entity)
-- parent entity = do
--   p <- outgoing @ChildOf entity
--   return $ case p of
--     [p] -> Just p
--     _ -> Nothing

-- children :: forall m w. (MonadSystem w m) => Entity -> m [Entity]
-- children = outgoing @ChildOf