{-# LANGUAGE DataKinds           #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications    #-}

module Arbor.File.Format.Asif.ByteString.BuilderSpec
  ( spec
  ) where

import Arbor.File.Format.Asif.Segment
import Conduit
import Control.Lens
import Data.Generics.Product
import HaskellWorks.Hspec.Hedgehog
import Hedgehog
import System.IO                      (openTempFile)
import Test.Hspec

import qualified Arbor.File.Format.Asif.ByteString.Builder as LB
import qualified Data.Attoparsec.ByteString                as AP
import qualified Data.ByteString                           as BS
import qualified Data.ByteString.Lazy                      as LBS
import qualified Hedgehog.Gen                              as G
import qualified Hedgehog.Range                            as R
import qualified System.IO                                 as IO

{-# ANN module ("HLint: ignore Redundant do"  :: String) #-}

spec :: Spec
spec = describe "App.ByteString.Lazy.Builder" $ do
  it "should extract segments" $ require $ withTests 1 $ property $ do
    b1 :: LBS.ByteString <- forAll $ flip LBS.replicate 65 <$> G.int64 (R.linear 0 10)
    b2 :: LBS.ByteString <- forAll $ flip LBS.replicate 66 <$> G.int64 (R.linear 0 10)
    b3 :: LBS.ByteString <- forAll $ flip LBS.replicate 67 <$> G.int64 (R.linear 0 10)

    (_, h1) <- liftIO $ openTempFile "/tmp" "h1.tmp"
    (_, h2) <- liftIO $ openTempFile "/tmp" "h2.tmp"
    (_, h3) <- liftIO $ openTempFile "/tmp" "h3.tmp"

    (_, he) <- liftIO $ openTempFile "/tmp" "he.tmp"

    liftIO $ BS.hPut h1 (LBS.toStrict b1)
    liftIO $ BS.hPut h2 (LBS.toStrict b2)
    liftIO $ BS.hPut h3 (LBS.toStrict b3)

    let segs = LB.segmentsRawC "wxyz"
          [ h1
          , h2
          , h3
          ]

    liftIO $ runConduit $ segs .| sinkHandle he

    liftIO $ IO.hSeek he IO.AbsoluteSeek 0

    contents <- liftIO $ LBS.hGetContents he

    _ <- forAll $ pure $ LBS.unpack contents

    let Right segments = extractSegments (AP.string "seg:wxyz") contents

    ((^. the @"payload") <$> segments) === [b1, b2, b3]