{-# LANGUAGE BangPatterns        #-}
{-# LANGUAGE OverloadedStrings   #-}
{-# LANGUAGE ScopedTypeVariables #-}

module HaskellWorks.Data.Dsv.Lazy.CursorSpec (spec) where

import Data.Semigroup                            ((<>))
import HaskellWorks.Hspec.Hedgehog
import Hedgehog
import Test.Hspec

import qualified Data.ByteString.Lazy                                   as LBS
import qualified Data.Vector                                            as V
import qualified HaskellWorks.Data.Dsv.Lazy.Cursor                      as SVL
import           HaskellWorks.Data.Dsv.Internal.Char (comma)

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

subjectEmpty, subjectSS, subjectSM, subjectMS, subjectMM :: LBS.ByteString
expectedEmpty, expectedSS, expectedSM, expectedMS, expectedMM :: [V.Vector LBS.ByteString]
subjectEmpty = ""
expectedEmpty = mkExpected []
subjectSS = "hello"
expectedSS = mkExpected [["hello"]]
subjectSM = "hello\nyes"
expectedSM = mkExpected [["hello"],["yes"]]
subjectMS = "hello,goodbye"
expectedMS = mkExpected [["hello","goodbye"]]
subjectMM = "hello,goodbye\nyes,no"
expectedMM = mkExpected [["hello","goodbye"],["yes","no"]]

testToListVector :: LBS.ByteString -> [V.Vector LBS.ByteString]
testToListVector = SVL.toListVector . SVL.makeCursor comma

-- Adds a terminal newline to the file
testToListVector' :: LBS.ByteString -> [V.Vector LBS.ByteString]
testToListVector' = testToListVector . (<> "\n")

mkExpected :: [[LBS.ByteString]] -> [V.Vector LBS.ByteString]
mkExpected = fmap V.fromList

spec :: Spec
spec = describe "HaskellWorks.Data.Dsv.Lazy.CursorSpec" $ do
  -- no terminal newline
  it "Case 1" $ requireTest $ do
    testToListVector subjectEmpty === expectedEmpty
  it "Case 2" $ requireTest $ do
    testToListVector subjectSS === expectedSS
  it "Case 3" $ requireTest $ do
    testToListVector subjectSM === expectedSM
  it "Case 4" $ requireTest $ do
    testToListVector subjectMS === expectedMS
  it "Case 5" $ requireTest $ do
    testToListVector subjectMM === expectedMM
  -- terminal newline
  -- the following test does not pass
  --it "Case 6" $ requireTest $ do
    --testToListVector' subjectEmpty === expectedEmpty
  it "Case 7" $ requireTest $ do
    testToListVector' subjectSS === expectedSS
  it "Case 8" $ requireTest $ do
    testToListVector' subjectSM === expectedSM
  it "Case 9" $ requireTest $ do
    testToListVector' subjectMS === expectedMS
  it "Case 10" $ requireTest $ do
    testToListVector' subjectMM === expectedMM