{-# LANGUAGE BinaryLiterals            #-}
{-# LANGUAGE CPP                       #-}
{-# LANGUAGE FlexibleContexts          #-}
{-# LANGUAGE FlexibleInstances         #-}
{-# LANGUAGE MultiParamTypeClasses     #-}
{-# LANGUAGE NegativeLiterals          #-}
{-# LANGUAGE NoMonomorphismRestriction #-}
{-# LANGUAGE ScopedTypeVariables       #-}

-- | Tests for the flat module
module Main where

import           Control.Monad
import           Data.Bits
import qualified Data.ByteString       as B
import qualified Data.ByteString.Lazy  as L
import qualified Data.ByteString.Short as SBS
import           Data.Char
import           Data.Either
import           Data.FloatCast
import           Data.Int
import           Data.Proxy
import qualified Data.Sequence         as Seq
import           Data.String           (fromString)
import qualified Data.Text             as T
import           Data.Text.Arbitrary
import           Data.Word
import           Flat
import           Flat.Bits
import           Flat.Decoder
import qualified Flat.Encoder          as E
import qualified Flat.Encoder.Prim     as E
import qualified Flat.Encoder.Strict   as E
import           Flat.Endian
import           Numeric.Natural
import           System.Exit
import           Test.Data
import           Test.Data.Arbitrary   ()
import           Test.Data.Flat
import           Test.Data.Values      hiding (lbs, ns)
import           Test.E
import           Test.E.Arbitrary      ()
import           Test.E.Flat
import           Test.Tasty
import           Test.Tasty.HUnit
import           Test.Tasty.QuickCheck as QC hiding (getSize)
-- import Test.QuickCheck.Arbitrary
import qualified Data.Complex          as B
import qualified Data.IntMap.Lazy      as CL
import qualified Data.IntMap.Strict    as CS
import qualified Data.Map              as C
import qualified Data.Map.Lazy         as CL
import qualified Data.Map.Strict       as CS
import qualified Data.Ratio            as B
-- import           Data.List
-- import           Data.Ord
#if MIN_VERSION_base(4,9,0)
import qualified Data.List.NonEmpty    as BI
#endif

instance Arbitrary UTF8Text where
  arbitrary = UTF8Text <$> arbitrary

  shrink t = UTF8Text <$> shrink (unUTF8 t)

#if! defined (ETA_VERSION)
instance Arbitrary UTF16Text where
  arbitrary = UTF16Text <$> arbitrary

  shrink t = UTF16Text <$> shrink (unUTF16 t)
#endif

-- instance Flat [Int16]
-- instance Flat [Word8]
-- instance Flat [Bool]
main = do
  -- printInfo
  -- print $ flat asciiStrT
  mainTest

  -- print $ flatRaw 18446744073709551615::Word64
  -- print $ B.unpack . flat $ (True,0::Word64,18446744073709551615::Word64)
  -- print (2^56::Word64,fromIntegral (1::Word8) `shiftL` 56 :: Word64,(18446744073709551615::Word64) `shiftR` 1)
  -- mainShow
  -- eWord64E id 0b
mainShow = do
  mapM_ (\_ -> generate (arbitrary :: Gen Int) >>= print) [1 .. 10]
  exitFailure

mainTest = defaultMain tests

tests :: TestTree
tests = testGroup "Tests" [testPrimitives, testEncDec, testFlat]

testPrimitives =
  testGroup "conversion/memory primitives" [testEndian, testFloatingConvert,testShifts ]

testEncDec = testGroup
  "encode/decode primitives"
  [ testEncodingPrim
  , testDecodingPrim
#ifdef TEST_DECBITS
  , testDecBits
#endif
  ]

testFlat = testGroup
  "flat/unflat"
  [testSize, testLargeEnum, testContainers, flatUnflatRT, flatTests]

-- Flat.Endian tests (to run, need to modify imports and cabal file)
testEndian = testGroup
  "Endian"
  [ convBE toBE16 (2 ^ 10 + 3) (2 ^ 9 + 2 ^ 8 + 4)
  , convBE toBE32 (2 ^ 18 + 3) 50332672
  , convBE toBE64 (2 ^ 34 + 3) 216172782180892672
  , convBE toBE16 0x1234 0x3412
  , convBE toBE32 0x11223344 0x44332211
  , convBE toBE64 0x0123456789ABCDEF 0xEFCDAB8967452301]

testFloatingConvert = testGroup
  "Floating conversions"
  [ conv floatToWord (-0.15625) 3189768192
  , conv wordToFloat 3189768192 (-0.15625)
  , conv doubleToWord (-0.15625) 13818169556679524352
  , conv wordToDouble 13818169556679524352 (-0.15625)
  , rt "floatToWord" (prop_float_conv :: RT Float)
  , rt "doubleToWord" (prop_double_conv :: RT Double)]

convBE f v littleEndianE =
  let e = if isBigEndian
          then v
          else littleEndianE
  in testCase (unwords ["conv BigEndian", sshow v, "to", sshow e]) $ f v @?= e

conv f v e = testCase
  (unwords ["conv", sshow v, showB . flat $ v, "to", sshow e])
  $ f v @?= e

testShifts = testGroup "Shifts" $ map tst [0 .. 33]
  where
    tst n = testCase ("shiftR " ++ show n)
      $ let val = 4294967295 :: Word32
            s = val `shift` (-n)
            r = val `shiftR` n
        in r @?= s

-- shR = shiftR
-- shR = unsafeShiftR
shR val 0 = val
shR val n = shift val (-n)

testEncodingPrim = testGroup
  "Encoding Primitives"
  [ encRawWith 1 E.eTrueF [0b10000001]
  , encRawWith 3 (E.eTrueF >=> E.eFalseF >=> E.eTrueF) [0b10100001]
    -- Depends on endianess
    --,encRawWith 32 (E.eWord32E id $ 2^18 + 3) [3,0,4,0,1]
    -- ,encRawWith 64 (E.eWord64E id $ 0x1122334455667788) [0x88,0x77,0x66,0x55,0x44,0x33,0x22,0x11,1]
    --,encRawWith 65 (E.eTrueF >=> E.eWord64E id (2^34 + 3)) [1,0,0,0,2,0,0,128,129]
    --,encRawWith 65 (E.eFalseF >=> E.eWord64E id (2^34 + 3)) [1,0,0,0,2,0,0,0,129]
    -- Big Endian
  , encRawWith 32 (E.eWord32BEF $ 2 ^ 18 + 3) [0, 4, 0, 3, 1]
  , encRawWith 64 (E.eWord64BEF $ 2 ^ 34 + 3) [0, 0, 0, 4, 0, 0, 0, 3, 1]
  , encRawWith
      65
      (E.eTrueF >=> E.eWord64BEF (2 ^ 34 + 3))
      [128, 0, 0, 2, 0, 0, 0, 1, 129]
  , encRawWith
      65
      (E.eFalseF >=> E.eWord64BEF (2 ^ 34 + 3))
      [0, 0, 0, 2, 0, 0, 0, 1, 129]]
  where
    encRawWith sz enc exp = testCase
      (unwords ["encode raw with size", show sz])
      $ flatRawWith sz enc @?= exp

testDecodingPrim = testGroup
  "Decoding Primitives"
  [ dec
      ((,,,) <$> dropBits 13 <*> dBool <*> dBool <*> dBool)
      [0b10111110, 0b10011010]
      ((), False, True, False)
  , dec
      ((,,,) <$> dropBits 1 <*> dBE16 <*> dBool <*> dropBits 6)
      [0b11000000, 0b00000001, 0b01000000]
      ((), 2 ^ 15 + 2, True, ())
  , dec
      ((,,,) <$> dropBits 1 <*> dBE32 <*> dBool <*> dropBits 6)
      [0b11000000, 0b00000000, 0b00000000, 0b00000001, 0b01000000]
      ((), 2 ^ 31 + 2, True, ())
  , dec
      dBE64
      [ 0b10000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000010]
      (2 ^ 63 + 2)
  , dec
      ((,,,) <$> dropBits 1 <*> dBE64 <*> dBool <*> dropBits 6)
      [ 0b11000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000000
      , 0b00000001
      , 0b01000000]
      ((), 2 ^ 63 + 2, True, ())]
  where
    dec decOp v e = testCase (unwords ["decode", sshow v])
      $ unflatRawWith decOp (B.pack v) @?= Right e

testDecBits = testGroup "Decode Bits"
  $ concat
    [ decBitsN dBEBits8
    , decBitsN dBEBits16
    , decBitsN dBEBits32
    , decBitsN dBEBits64]
-- Test dBEBits8/16/32/64, extraction of up to 8/16/32/bits from various positions
  where
    decBitsN :: forall a.
             (Num a, FiniteBits a, Show a, Flat a)
             => (Int -> Get a)
             -> [TestTree]
    decBitsN dec = let s = finiteBitSize (undefined :: a)
                   in [decBits_ dec val numBitsToTake pre
                      | numBitsToTake <- [0 .. s]
                      , val <- [ 0 :: a
                               , 1 + 2 ^ (s - 2) + 2 ^ (s - 5)
                               , fromIntegral $ (2 ^ s :: Integer) - 1]
                      , pre <- [0, 1, 7]]

    decBits_ :: forall a.
             (FiniteBits a, Show a, Flat a)
             => (Int -> Get a)
             -> a
             -> Int
             -> Int
             -> TestTree
    decBits_ deco val numBitsToTake pre =
      -- a sequence composed by pre zero bits followed by the val and zero bits till the next byte boundary
      let vs = B.pack . asBytes . fromBools
            $ replicate pre False ++ toBools (asBits val)
          len = B.length vs
          sz = finiteBitSize (undefined :: a)
          dec :: Get a
          dec = do
            dropBits pre
            r <- deco numBitsToTake
            dropBits (len * 8 - numBitsToTake - pre)
            return r
          -- we expect the first numBitsToTake bits of the value
          expectedD@(Right expected) :: Decoded a = Right
            $ val `shR` (sz - numBitsToTake)
          actualD@(Right actual) :: Decoded a = unflatRawWith dec vs
      in testCase
           (unwords
              [ "take"
              , show numBitsToTake
              , "bits from"
              , show val
              , "of size"
              , show sz
              , "with prefix"
              , show pre
              , "sequence"
              , showB vs
              , show expected
              , show actual
              , show $ val == actual
              , show $ expected == actual
              , show $ expected /= actual
              , show $ show expected == show actual
              , show $ flat expected == flat actual])
         $ actualD @?= expectedD

testSize = testGroup "Size"
  $ concat
    [ sz () 0
    , sz True 1
    , sz One 2
    , sz Two 2
    , sz Three 2
    , sz Four 3
    , sz Five 3
    , sz 'a' 8
    , sz 'à' 16
    , sz '经' 24
    , sz (0 :: Word8) 8
    , sz (1 :: Word8) 8
    , concatMap (uncurry sz) ns
    , concatMap (uncurry sz) nsI
    , concatMap (uncurry sz) nsII
    , sz (1.1 :: Float) 32
    , sz (1.1 :: Double) 64
    , sz "" 1
    , sz "abc" (4 + 3 * 8)
    , sz ((), (), Unit) 0
    , sz (True, False, One, Five) 7
    , sz map1 7
    , sz bs (4 + 3 * 8)
    , sz stBS bsSize
    , sz lzBS bsSize
    , sz shBS bsSize
    , sz tx utf8Size
    , sz (UTF8Text tx) utf8Size
#if ! defined (ETA_VERSION)
    , sz (UTF16Text tx) utf16Size
#endif
    ]
  where
    tx = T.pack "txt"

#if MIN_VERSION_text(2,0,0)
    utf8Size = 8 + 8 + (3 * 8) + 8
#else
    utf8Size = 8 + 8 + (3 * 3 * 8) + 8
#endif
    utf16Size = 8 + 8 + 3 * 16 + 8

    bsSize = 8 + 8 + 3 * 8 + 8

sz v e = let calculated = getSize v
             actual = B.length (flat v) * 8 - 1 -- FIX
         in
          [testCase (unwords ["size of", sshow v]) $ calculated @?= e
          -- ,testCase (unwords ["calculated size <= actual", sshow v]) $ actual <= calculated @? unwords ["calculated size",show calculated,"actual",show actual]
          ]

-- E258_256 = 11111110 _257 = 111111110 _258 = 111111111
testLargeEnum = testGroup "test enum with more than 256 constructors"
  $ concat
    [
#ifdef ENUM_LARGE
      sz E258_256 8
    , sz E258_257 9
    , sz E258_258 9
      -- As encodes are inlined, this is going to take for ever if this is compiled with -O1 or -O2
      -- , encRaw (E258_256) [0b11111110]
      -- , encRaw (E258_257) [0b11111111,0b00000000]
      -- , encRaw (E258_258) [0b11111111,0b10000000]
      -- , encRaw (E258_256,E258_257,E258_258) [0b11111110,0b11111111,0b01111111,0b11000000]
    , map trip [E258_1, E258_256, E258_257, E258_258]
    , map trip [E256_1, E256_134, E256_256]
#endif
    ]

testContainers =
  testGroup "containers" [trip longSeq, trip dataMap, trip listMap]

    -- , trip intMap
flatUnflatRT = testGroup
  "unflat (flat v) == v"
  [ rt "()" (prop_Flat_roundtrip :: RT ())
  , rt "Bool" (prop_Flat_roundtrip :: RT Bool)
  , rt "Char" (prop_Flat_roundtrip :: RT Char)
  , rt "Complex" (prop_Flat_roundtrip :: RT (B.Complex Float))
  , rt "Either N Bool" (prop_Flat_roundtrip :: RT (Either N Bool))
  , rt "Either Int Char" (prop_Flat_roundtrip :: RT (Either Int Char))
  , rt "Int8" (prop_Flat_Large_roundtrip :: RTL Int8)
  , rt "Int16" (prop_Flat_Large_roundtrip :: RTL Int16)
  , rt "Int32" (prop_Flat_Large_roundtrip :: RTL Int32)
  , rt "Int64" (prop_Flat_Large_roundtrip :: RTL Int64)
  , rt "Int" (prop_Flat_Large_roundtrip :: RTL Int)
  , rt "[Int16]" (prop_Flat_roundtrip :: RT [Int16])
  , rt "String" (prop_Flat_roundtrip :: RT String)
#if MIN_VERSION_base(4,9,0)
  , rt "NonEmpty" (prop_Flat_roundtrip :: RT (BI.NonEmpty Bool))
#endif
  , rt "Maybe N" (prop_Flat_roundtrip :: RT (Maybe N))
  , rt "Ratio" (prop_Flat_roundtrip :: RT (B.Ratio Int32))
  , rt "Word8" (prop_Flat_Large_roundtrip :: RTL Word8)
  , rt "Word16" (prop_Flat_Large_roundtrip :: RTL Word16)
  , rt "Word32" (prop_Flat_Large_roundtrip :: RTL Word32)
  , rt "Word64" (prop_Flat_Large_roundtrip :: RTL Word64)
  , rt "Word" (prop_Flat_Large_roundtrip :: RTL Word)
  , rt "Natural" (prop_Flat_roundtrip :: RT Natural)
  , rt "Integer" (prop_Flat_roundtrip :: RT Integer)
  , rt "Float" (prop_Flat_roundtrip :: RT Float)
  , rt "Double" (prop_Flat_roundtrip :: RT Double)
  , rt "Text" (prop_Flat_roundtrip :: RT T.Text)
  , rt "UTF8 Text" (prop_Flat_roundtrip :: RT UTF8Text)
#if! defined (ETA_VERSION)
  , rt "UTF16 Text" (prop_Flat_roundtrip :: RT UTF16Text)
#endif
  , rt "ByteString" (prop_Flat_roundtrip :: RT B.ByteString)
  , rt "Lazy ByteString" (prop_Flat_roundtrip :: RT L.ByteString)
  , rt "Short ByteString" (prop_Flat_roundtrip :: RT SBS.ShortByteString)
  , rt "Map.Strict" (prop_Flat_roundtrip :: RT (CS.Map Int Bool))
  , rt "Map.Lazy" (prop_Flat_roundtrip :: RT (CL.Map Int Bool))
  , rt "IntMap.Strict" (prop_Flat_roundtrip :: RT (CS.IntMap Bool))
  , rt "IntMap.Lazy" (prop_Flat_roundtrip :: RT (CL.IntMap Bool))
  , rt "Unit" (prop_Flat_roundtrip :: RT Unit)
  , rt "Un" (prop_Flat_roundtrip :: RT Un)
  , rt "N" (prop_Flat_roundtrip :: RT N)
  , rt "E2" (prop_Flat_roundtrip :: RT E2)
  , rt "E3" (prop_Flat_roundtrip :: RT E3)
  , rt "E4" (prop_Flat_roundtrip :: RT E4)
  , rt "E8" (prop_Flat_roundtrip :: RT E8)
  , rt "E16" (prop_Flat_roundtrip :: RT E16)
  , rt "E17" (prop_Flat_roundtrip :: RT E17)
  , rt "E32" (prop_Flat_roundtrip :: RT E32)
  , rt "A" (prop_Flat_roundtrip :: RT A)
  , rt "B" (prop_Flat_roundtrip :: RT B)
    -- ,rt "Tree Bool" (prop_Flat_roundtrip:: RT (Tree Bool))
    -- ,rt "Tree N" (prop_Flat_roundtrip:: RT (Tree N))
  , rt "List N" (prop_Flat_roundtrip :: RT (List N))]

rt n = QC.testProperty (unwords ["round trip", n])

flatTests = testGroup "flat/unflat Unit tests"
  $ concat
    [ -- Expected errors
      errDec (Proxy :: Proxy Bool) [] -- no data
    , errDec (Proxy :: Proxy Bool) [128] -- no filler
    , errDec (Proxy :: Proxy Bool) [128 + 1, 1, 2, 4, 8] -- additional bytes
    , errDec (Proxy :: Proxy Text) (B.unpack (flat ((fromString "\x80") :: B.ByteString))) -- invalid UTF-8
    , encRaw () []
    , encRaw ((), (), Unit) []
    , encRaw (Unit, 'a', Unit, 'a', Unit, 'a', Unit) [97, 97, 97]
    , a () [1]
    , a True [128 + 1]
    , a (True, True) [128 + 64 + 1]
    , a (True, False, True) [128 + 32 + 1]
    , a (True, False, True, True) [128 + 32 + 16 + 1]
    , a (True, False, True, True, True) [128 + 32 + 16 + 8 + 1]
    , a (True, False, True, True, True, True) [128 + 32 + 16 + 8 + 4 + 1]
    , a
        (True, False, True, True, True, True, True)
        [128 + 32 + 16 + 8 + 4 + 2 + 1]
    , a
        (True, False, True, True, (True, True, True, True))
        [128 + 32 + 16 + 8 + 4 + 2 + 1, 1]
    , encRaw (True, False, True, True) [128 + 32 + 16]
    , encRaw
        ( (True, True, False, True, False)
        , (False, False, True, False, True, True))
        [128 + 64 + 16 + 1, 64 + 32]
    , encRaw ('\0', '\1', '\127') [0, 1, 127]
    , encRaw (33 :: Word32, 44 :: Word32) [33, 44]
       --,s (Elem True) [64]
       --,s (NECons True (NECons False (Elem True))) [128+64+32+4]
    , encRaw (0 :: Word8) [0]
    , encRaw (1 :: Word8) [1]
    , encRaw (255 :: Word8) [255]
    , encRaw (0 :: Word16) [0]
    , encRaw (1 :: Word16) [1]
    , encRaw (255 :: Word16) [255, 1]
    , encRaw (256 :: Word16) [128, 2]
    , encRaw (65535 :: Word16) [255, 255, 3]
    , encRaw (127 :: Word32) [127]
    , encRaw (128 :: Word32) [128, 1]
    , encRaw (129 :: Word32) [129, 1]
    , encRaw (255 :: Word32) [255, 1]
    , encRaw (16383 :: Word32) [255, 127]
    , encRaw (16384 :: Word32) [128, 128, 1]
    , encRaw (16385 :: Word32) [129, 128, 1]
    , encRaw (32767 :: Word32) [255, 255, 1]
    , encRaw (32768 :: Word32) [128, 128, 2]
    , encRaw (32769 :: Word32) [129, 128, 2]
    , encRaw (65535 :: Word32) [255, 255, 3]
    , encRaw (2097151 :: Word32) [255, 255, 127]
    , encRaw (2097152 :: Word32) [128, 128, 128, 1]
    , encRaw (2097153 :: Word32) [129, 128, 128, 1]
    , encRaw (4294967295 :: Word32) [255, 255, 255, 255, 15]
    , encRaw (255 :: Word64) [255, 1]
    , encRaw (65535 :: Word64) [255, 255, 3]
    , encRaw (4294967295 :: Word64) [255, 255, 255, 255, 15]
    , encRaw
        (18446744073709551615 :: Word64)
        [255, 255, 255, 255, 255, 255, 255, 255, 255, 1]
    , encRaw
        (False, 18446744073709551615 :: Word64)
        [127, 255, 255, 255, 255, 255, 255, 255, 255, 128, 128]
    , encRaw (255 :: Word) [255, 1]
    , encRaw (65535 :: Word) [255, 255, 3]
    , encRaw (4294967295 :: Word) [255, 255, 255, 255, 15]
    , tstI [0 :: Int8, 2, -2]
    , encRaw (127 :: Int8) [254]
    , encRaw (-128 :: Int8) [255]
    , tstI [0 :: Int16, 2, -2, 127, -128]
    , tstI [0 :: Int32, 2, -2, 127, -128]
    , tstI [0 :: Int64, 2, -2, 127, -128]
    , encRaw (-1024 :: Int64) [255, 15]
    , encRaw (maxBound :: Word8) [255]
    , encRaw (True, maxBound :: Word8) [255, 128]
    , encRaw (maxBound :: Word16) [255, 255, 3]
    , encRaw (True, maxBound :: Word16) [255, 255, 129, 128]
    , encRaw (maxBound :: Word32) [255, 255, 255, 255, 15]
    , encRaw (True, maxBound :: Word32) [255, 255, 255, 255, 135, 128]
    , encRaw
        (maxBound :: Word64)
        [255, 255, 255, 255, 255, 255, 255, 255, 255, 1]
    , encRaw
        (True, maxBound :: Word64)
        [255, 255, 255, 255, 255, 255, 255, 255, 255, 128, 128]
    , encRaw
        (minBound :: Int64)
        [255, 255, 255, 255, 255, 255, 255, 255, 255, 1]
    , encRaw
        (maxBound :: Int64)
        [254, 255, 255, 255, 255, 255, 255, 255, 255, 1]
    , tstI [0 :: Int, 2, -2, 127, -128]
    , tstI [0 :: Integer, 2, -2, 127, -128, -256, -512]
    , encRaw (-1024 :: Integer) [255, 15]
    , encRaw (0 :: Float) [0, 0, 0, 0]
    , encRaw (-2 :: Float) [0b11000000, 0, 0, 0]
    , encRaw (0.085 :: Float) [0b00111101, 0b10101110, 0b00010100, 0b01111011]
    , encRaw (0 :: Double) [0, 0, 0, 0, 0, 0, 0, 0]
    , encRaw (-2 :: Double) [0b11000000, 0, 0, 0, 0, 0, 0, 0]
    , encRaw (23 :: Double) [0b01000000, 0b00110111, 0, 0, 0, 0, 0, 0]
    , encRaw (-0.15625 :: Float) [0b10111110, 0b00100000, 0, 0]
    , encRaw (-0.15625 :: Double) [0b10111111, 0b11000100, 0, 0, 0, 0, 0, 0]
    , encRaw
        (-123.2325E-23 :: Double)
        [ 0b10111011
        , 0b10010111
        , 0b01000111
        , 0b00101000
        , 0b01110101
        , 0b01111011
        , 0b01000111
        , 0b10111010]
    , encRaw (Left True :: Either Bool (Double, Double)) [0b01000000]
    , encRaw (-2.1234E15 :: Double) [195, 30, 44, 226, 90, 221, 64, 0]
    , encRaw (1.1234E-22 :: Double) [59, 96, 249, 241, 120, 219, 249, 174]
    , encRaw
        ((False, -2.1234E15) :: (Bool, Double))
        [97, 143, 22, 113, 45, 110, 160, 0, 0]
    , encRaw
        ((True, -2.1234E15) :: (Bool, Double))
        [225, 143, 22, 113, 45, 110, 160, 0, 0]
    , encRaw ((-2.1234E15, 1.1234E-22) :: (Double, Double))
        $ [0b11000011, 30, 44, 226, 90, 221, 64, 0]
        ++ [59, 96, 249, 241, 120, 219, 249, 174]
    , encRaw
        ((True, -2.1234E15, 1.1234E-22) :: (Bool, Double, Double))
        [ 0b11100001
        , 143
        , 22
        , 113
        , 45
        , 110
        , 160
        , 0
        , 29
        , 176
        , 124
        , 248
        , 188
        , 109
        , 252
        , 215
        , 0]
    , encRaw
        (Right (-2.1234E15, 1.1234E-22) :: Either Bool (Double, Double))
        [ 0b11100001
        , 143
        , 22
        , 113
        , 45
        , 110
        , 160
        , 0
        , 29
        , 176
        , 124
        , 248
        , 188
        , 109
        , 252
        , 215
        , 0]
    , encRaw (Left True :: Either Bool Direction) [0b01000000]
    , encRaw (Right West :: Either Bool Direction) [0b11110000]
    , map trip [minBound, maxBound :: Word8]
    , map trip [minBound, maxBound :: Word16]
    , map trip [minBound, maxBound :: Word32]
    , map trip [minBound, maxBound :: Word64]
    , map trip [minBound :: Int8, maxBound :: Int8]
    , map trip [minBound :: Int16, maxBound :: Int16]
    , map trip [minBound :: Int32, maxBound :: Int32]
    , map trip [minBound :: Int64, maxBound :: Int64]
    , map tripShow [0 :: Float, -0 :: Float, 0 / 0 :: Float, 1 / 0 :: Float]
    , map
        tripShow
        [0 :: Double, -0 :: Double, 0 / 0 :: Double, 1 / 0 :: Double]
    , encRaw '\0' [0]
    , encRaw '\1' [1]
    , encRaw '\127' [127]
    , encRaw 'a' [97]
    , encRaw 'à' [224, 1]
    , encRaw '经' [207, 253, 1]
    , [trip [chr 0x10FFFF]]
    , encRaw Unit []
    , encRaw (Un False) [0]
    , encRaw (One, Two, Three) [16 + 8]
    , encRaw (Five, Five, Five) [255, 128]
       --,s (NECons True (Elem True)) [128+64+16]
    , encRaw "" [0]
#ifdef LIST_BIT
    , encRaw "abc" [176, 216, 172, 96]
    , encRaw [False, True, False, True] [128 + 32 + 16 + 8 + 2 + 1, 0]
#elif defined(LIST_BYTE)
    , s "abc" s3
    , s (cs 600) s600
#endif
       -- Aligned structures
       --,s (T.pack "") [1,0]
       --,s (Just $ T.pack "abc") [128+1,3,97,98,99,0]
       --,s (T.pack "abc") (al s3)
       --,s (T.pack $ cs 600) (al s600)
    , encRaw map1 [0b10111000]
    , encRaw (B.pack $ csb 3) (bsl c3)
    , encRaw (B.pack $ csb 600) (bsl s600)
    , encRaw (L.pack $ csb 3) (bsl c3)
      -- Long LazyStrings can have internal sections shorter than 255
      --,s (L.pack $ csb 600) (bsl s600)
    , [trip [1 .. 100 :: Int16]]
      -- See https://github.com/typelead/eta/issues/901
#ifndef ETA_VERSION
    , [trip longAsciiStrT]
    , [trip longBoolListT]
#endif
    , [trip asciiTextT]
    , [trip english]
    , [trip "维护和平正"]
    , [trip (T.pack "abc")]
    , [trip unicodeText]
    , [trip unicodeTextUTF8T]
    , [trip chineseTextUTF8T]
#if ! defined (ETA_VERSION)
    , [trip chineseTextUTF16T]
    , [trip unicodeTextUTF16T]
#endif
    , [trip longBS, trip longLBS]
    , [trip longSBS]
    ]
--al = (1:) -- prealign
  where
    bsl = id -- noalign

    tstI = map ti

    ti v
      | v >= 0 = testCase (unwords ["Int", show v])
        $ teq v (2 * fromIntegral v :: Word64)
      | otherwise = testCase (unwords ["Int", show v])
        $ teq v (2 * fromIntegral (-v) - 1 :: Word64)

    teq a b = ser a @?= ser b

            --,testCase (unwords ["unflat raw",sshow v]) $ desRaw e @?= Right v]
    -- Aligned values unflat to the original value, modulo the added filler.
    a v e = [ testCase (unwords ["flat", sshow v]) $ ser v @?= e
            , testCase (unwords ["unflat", sshow v])
                $ let Right v' = des e
                  in v @?= v']

      -- a v e = [testCase (unwords ["flat postAligned",show v]) $ ser (postAligned v) @?= e
      --         ,testCase (unwords ["unflat postAligned",show v]) $ let Right (PostAligned v' _) = des e in v @?= v']
encRaw :: forall a. (Show a, Flat a) => a -> [Word8] -> [TestTree]
encRaw v e =
  [ testCase (unwords ["flat raw", sshow v, show . B.unpack . flat $ v])
      $ serRaw v @?= e]

trip :: forall a. (Show a, Flat a, Eq a) => a -> TestTree
trip v = testCase (unwords ["roundtrip", sshow v])
  $
  -- direct comparison
  (unflat (flat v :: B.ByteString) :: Decoded a) @?= (Right v :: Decoded a)

tripShow :: forall a. (Show a, Flat a, Eq a) => a -> TestTree
tripShow v = testCase (unwords ["roundtrip", sshow v])
  $
  -- we use show to get Right NaN == Right NaN
  show (unflat (flat v :: B.ByteString) :: Decoded a)
  @?= show (Right v :: Decoded a)

-- Test Data
lzBS = L.pack bs

stBS = B.pack bs

bs = [32, 32, 32 :: Word8]

s3 = [3, 97, 98, 99, 0]

c3a = [3, 99, 99, 99, 0] -- Array Word8

c3 = pre c3a

s600 = pre s600a

pre = (1:)

s600a = concat [[255], csb 255, [255], csb 255, [90], csb 90, [0]]

s600B =
  concat [[55], csb 55, [255], csb 255, [90], csb 90, [200], csb 200, [0]]

longSeq :: Seq.Seq Word8
longSeq = Seq.fromList lbs

longBS = B.pack lbs

longLBS = L.concat $ concat $ replicate 10 [L.pack lbs]

lbs = concat $ replicate 100 [234, 123, 255, 0]

cs n = replicate n 'c' -- take n $ cycle ['a'..'z']

csb = map (fromIntegral . ord) . cs

map1 = C.fromList [(False, True), (True, False)]

ns :: [(Word64, Int)]
ns = [((-) (2 ^ (i * 7)) 1, fromIntegral (8 * i)) | i <- [1 .. 10]]

nsI :: [(Int64, Int)]
nsI = nsI_

nsII :: [(Integer, Int)]
nsII = nsI_

nsI_ = [((-) (2 ^ (((-) i 1) * 7)) 1, fromIntegral (8 * i)) | i <- [1 .. 10]]

shBS = SBS.toShort stBS

longSBS = SBS.toShort longBS

sshow = take 80 . show

showB = show . B.unpack

errDec :: forall a. (Flat a, Eq a, Show a) => Proxy a -> [Word8] -> [TestTree]

--errDec _ bs = [testCase "bad decode" $ let ev = (des bs::Decoded a) in ev @?= Left ""]
errDec _ bs = [ testCase "bad decode"
                  $ let ev = (des bs :: Decoded a)
                    in isRight ev @?= False]

ser :: Flat a => a -> [Word8]
ser = B.unpack . flat

des :: Flat a => [Word8] -> Decoded a
des = unflat

flatRawWith sz enc = B.unpack
  $ E.strictEncoder (sz + 8) (E.Encoding $ enc >=> E.eFillerF)

serRaw :: Flat a => a -> [Word8]

-- serRaw = B.unpack . flatRaw
-- serRaw = L.unpack . flatRaw
serRaw = asBytes . bits

--desRaw :: Flat a => [Word8] -> Decoded a
--desRaw = unflatRaw . L.pack
type RT a = a -> Bool

type RTL a = Large a -> Bool

prop_Flat_roundtrip :: (Flat a, Eq a) => a -> Bool
prop_Flat_roundtrip = roundTripExt

prop_Flat_Large_roundtrip :: (Eq b, Flat b) => Large b -> Bool
prop_Flat_Large_roundtrip (Large x) = roundTripExt x

roundTrip x = unflat (flat x :: B.ByteString) == Right x

-- Test roundtrip for both the value and the value embedded between bools
roundTripExt x = roundTrip x && roundTrip (True, x, False)

prop_double_conv d = wordToDouble (doubleToWord d) == d

prop_float_conv d = wordToFloat (floatToWord d) == d
{-
prop_common_unsigned :: (Num l,Num h,Flat l,Flat h) => l -> h -> Bool
prop_common_unsigned n _ = let n2 :: h = fromIntegral n
                           in flat n == flat n2
-}
-- e :: Stream Bool
-- e = unflatIncremental . flat $ stream1
-- el :: List Bool
-- el = unflatIncremental . flat $ infList
-- deflat = unflat
-- b1 :: BLOB UTF8
-- b1 = BLOB UTF8 (preAligned (List255 [97,98,99]))
-- -- b1 = BLOB (preAligned (UTF8 (List255 [97,98,99])))