1 files changed, 14 insertions, 1 deletions

diff --git a/src/Sequence/Utils.hs b/src/Sequence/Utils.hs
index 929189e..ba6ce95 100644
--- a/src/Sequence/Utils.hs
+++ b/src/Sequence/Utils.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE ViewPatterns, FlexibleContexts, MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances, UndecidableInstances, OverloadedStrings, RankNTypes #-}
+{-# LANGUAGE ViewPatterns, FlexibleContexts, MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances, UndecidableInstances, OverloadedStrings, OverloadedLists, RankNTypes #-}
 
 module Sequence.Utils
   ( withArg, withFocus, withFocus'
@@ -140,3 +140,16 @@ instance Argument DamageType GameState where
   arg (CI.mk -> word) = return $ Map.lookup word types
     where
       types = Map.fromList [(CI.mk $ show dType, dType) | dType <- [minBound .. maxBound]]
+
+instance Completion (Formula Stats) GameState where
+  completableLabel _ = "<value>"
+  complete _ st (CI.foldCase -> prefix) = return . map CI.original . filter ((prefix `isPrefixOf`) . CI.foldedCase) . Map.keys $ Map.filter (isJust . (\a -> preview (gFocus' . eStats . folding a) st)) statAccessors
+
+instance Argument (Formula Stats) GameState where
+  arg (CI.mk -> name) = runMaybeT $ do
+    accessor <- MaybeT . return $ Map.lookup name statAccessors
+    MaybeT . preuse $ gFocus' . eStats . folding accessor
+
+statAccessors :: Map (CI String) (Stats -> Maybe (Formula Stats))
+statAccessors = [
+                ]