{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE LambdaCase #-}
{-# language TemplateHaskell #-}
{-# options_ghc -Wno-unused-imports #-}
module Data.Generics.Encode.Internal.Prim (VP(..), vpInt, vpBool, vpFloat, vpDouble, vpScientific, vpChar, vpString, vpText, vpOneHot) where

import Data.Int (Int8, Int16, Int32, Int64)
import Data.Word (Word, Word8, Word16, Word32, Word64)
import qualified GHC.Generics as G

-- hashable
import Data.Hashable (Hashable(..))
-- microlens-th
import Lens.Micro.TH (makeLenses)
-- scientific
import Data.Scientific (Scientific)
-- text
import Data.Text (Text, unpack)

import Data.Generics.Encode.OneHot (OneHot, mkOH)

-- | Primitive types
--
-- NB : this is just a convenience for unityping the dataframe contents, but it should not be exposed to the library users 
data VP =
     VPInt    { _vpInt :: Int }    -- ^ 'Int'
   | VPInt8   Int8  -- ^ 'Int8'
   | VPInt16   Int16  -- ^ 'Int16'
   | VPInt32   Int32 -- ^ 'Int32'
   | VPInt64   Int64 -- ^ 'Int64'
   | VPWord   Word   -- ^ 'Word'
   | VPWord8   Word8  -- ^ 'Word8'
   | VPWord16   Word16 -- ^ 'Word16'
   | VPWord32   Word32 -- ^ 'Word32'
   | VPWord64   Word64   -- ^ 'Word64'
   | VPBool   { _vpBool :: Bool } -- ^ 'Bool'
   | VPFloat  { _vpFloat :: Float } -- ^ 'Float'
   | VPDouble { _vpDouble :: Double } -- ^ 'Double'
   | VPScientific { _vpScientific :: Scientific } -- ^ 'Scientific'
   | VPChar   { _vpChar :: Char } -- ^ 'Char'
   | VPString { _vpString :: String } -- ^ 'String'
   | VPText   { _vpText :: Text } -- ^ 'Text'
   | VPOH     { _vpOneHot :: OneHot Int }  -- ^ 1-hot encoding of an enum value
   | VPUnit
   deriving (Eq, Ord, G.Generic)
instance Hashable VP
makeLenses ''VP

instance Show VP where
  show = \case
    VPInt x -> show x
    VPInt8 x -> show x
    VPInt16 x -> show x
    VPInt32 x -> show x
    VPInt64 x -> show x
    VPWord x -> show x
    VPWord8 x -> show x
    VPWord16 x -> show x
    VPWord32 x -> show x
    VPWord64 x -> show x
    VPBool b   -> show b
    VPFloat f -> show f
    VPDouble d -> show d
    VPScientific s -> show s
    VPChar d -> pure d
    VPString s -> s
    VPText t -> unpack t
    VPOH oh -> show oh
    VPUnit -> show ()