module Ribosome.Msgpack.Util(
  Err,
  string,
  assembleMap,
  invalid,
  missingRecordKey,
  illegalType,
) where

import Data.Bifunctor (first)
import Data.ByteString.Internal (packChars)
import qualified Data.Map.Strict as Map (fromList)
import Data.MessagePack (Object(..))
import Data.Text.Prettyprint.Doc (Doc, (<+>), viaShow, pretty)
import Data.Text.Prettyprint.Doc.Render.Terminal (AnsiStyle)

type Err = Doc AnsiStyle

string :: String -> Object
string = ObjectString . packChars

assembleMap :: [(String, Object)] -> Object
assembleMap = ObjectMap . Map.fromList . (fmap . first) string

invalid :: String -> Object -> Either Err a
invalid msg obj =
  Left $ pretty (msg ++ ": ") <+> viaShow obj

missingRecordKey :: String -> Object -> Either Err a
missingRecordKey key =
  invalid $ "missing record key " ++ key ++ " in ObjectMap"

illegalType :: String -> Object -> Either Err a
illegalType tpe = invalid $ "illegal type for " ++ tpe