{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric  #-}
{-# LANGUAGE DeriveLift     #-}

module Data.Morpheus.Types.Internal.Base
  ( Key
  , Collection
  , Position
  , EnhancedKey(..)
  , Location(..)
  , enhanceKeyWithNull
  ) where

import           Data.Aeson                 (FromJSON, ToJSON)
import           Data.Text                  (Text)
import           GHC.Generics               (Generic)
import           Language.Haskell.TH.Syntax (Lift)

type Position = Location

data Location = Location
  { line   :: Int
  , column :: Int
  } deriving (Show, Generic, FromJSON, ToJSON, Lift)

type Key = Text

type Collection a = [(Key, a)]

-- Text value that includes position for debugging, where EnhancedKey "a" 1 === EnhancedKey "a" 3
data EnhancedKey = EnhancedKey
  { uid      :: Text
  , location :: Position
  } deriving (Show)

instance Eq EnhancedKey where
  (EnhancedKey id1 _) == (EnhancedKey id2 _) = id1 == id2

instance Ord EnhancedKey where
  compare (EnhancedKey x _) (EnhancedKey y _) = compare x y

enhanceKeyWithNull :: Key -> EnhancedKey
enhanceKeyWithNull text = EnhancedKey {uid = text, location = Location 0 0}