{-# language BangPatterns #-}
{-# language ScopedTypeVariables #-}
{-# language TypeApplications #-}
{-# language OverloadedStrings #-}

import Control.Monad.ST (runST)
import Data.ByteArray.Builder
import Data.Primitive (PrimArray)
import Data.Word
import Data.Char (ord,chr)
import Data.Primitive (ByteArray)
import Test.Tasty (defaultMain,testGroup,TestTree)
import Test.QuickCheck ((===))
import Text.Printf (printf)
import Test.Tasty.HUnit ((@=?))

import qualified Arithmetic.Nat as Nat
import qualified Data.ByteString as ByteString
import qualified Data.ByteString.Builder as BB
import qualified Data.ByteString.Lazy.Char8 as LB
import qualified Data.Bytes.Chunks as Chunks
import qualified Data.List as L
import qualified Data.Primitive as PM
import qualified Data.Text as T
import qualified Data.Text.Encoding as TE
import qualified GHC.Exts as Exts
import qualified Test.Tasty.HUnit as THU
import qualified Test.Tasty.QuickCheck as TQC

import qualified HexWord64
import qualified Word16Tree

main :: IO ()
main = defaultMain tests

tests :: TestTree
tests = testGroup "Tests"
  [ testGroup "live"
    [ TQC.testProperty "word64Dec" $ \w ->
        runConcat 1 (word64Dec w) === pack (show w)
    , TQC.testProperty "word64Dec-x3" $ \x y z ->
        runConcat 1 (word64Dec x <> word64Dec y <> word64Dec z)
        ===
        pack (show x ++ show y ++ show z)
    , TQC.testProperty "int64Dec-x3" $ \x y z ->
        runConcat 1 (int64Dec x <> int64Dec y <> int64Dec z)
        ===
        pack (show x ++ show y ++ show z)
    , TQC.testProperty "word64BE-x3" $ \x y z ->
        runConcat 1 (word64BE x <> word64BE y <> word64BE z)
        ===
        pack (LB.unpack (BB.toLazyByteString (BB.word64BE x <> BB.word64BE y <> BB.word64BE z)))
    , TQC.testProperty "word64PaddedUpperHex" $ \w ->
        runConcat 1 (word64PaddedUpperHex w)
        ===
        pack (showWord64PaddedUpperHex w)
    , TQC.testProperty "word8Dec" $ \w ->
        runConcat 1 (word8Dec w)
        ===
        pack (show w)
    , TQC.testProperty "consLength32BE" $ \w ->
        runConcat 1 (consLength32BE (word8Dec w))
        ===
        pack ('\x00' : '\x00' : '\x00' : chr (L.length (show w)) : show w)
    , TQC.testProperty "consLength64BE-uni" $ \w ->
        pack
          ( '\x00' : '\x00' : '\x00' : '\x00'
          : '\x00' : '\x00' : '\x00' : chr (L.length (show w))
          : show w
          )
        ===
        runConcat 1 (consLength64BE (word16Dec w))
    , TQC.testProperty "consLength64BE-multi" $ \w ->
        pack
          ( '\x00' : '\x00' : '\x00' : '\x00'
          : '\x00' : '\x00' : '\x00' : chr (1 + L.length (show w))
          : '\x42' : show w
          )
        ===
        runConcat 1 (consLength64BE (word8 0x42 <> flush 2 <> word16Dec w))
    , THU.testCase "stringUtf8" $
        packUtf8 "¿Cómo estás? I am doing well." @=?
          runConcat 1 (stringUtf8 "¿Cómo estás? I am doing well.")
    , THU.testCase "doubleDec-A" $
        pack (show (2 :: Int)) @=? runConcat 1 (doubleDec 2.0)
    , THU.testCase "doubleDec-B" $
        pack (show (2.5 :: Double)) @=? runConcat 1 (doubleDec 2.5)
    , THU.testCase "doubleDec-C" $
        pack ("1e+15") @=? runConcat 1 (doubleDec 1e15)
    , THU.testCase "doubleDec-D" $
        pack ("-42") @=? runConcat 1 (doubleDec (-42))
    , THU.testCase "doubleDec-E" $
        pack ("-8.88888888888888e+14") @=? runConcat 1 (doubleDec (-888888888888888.8888888))
    , THU.testCase "doubleDec-F" $
        pack ("42") @=? runConcat 1 (doubleDec 42)
    , THU.testCase "doubleDec-G" $
        pack ("0") @=? runConcat 1 (doubleDec 0)
    , THU.testCase "doubleDec-H" $
        pack ("0.5") @=? runConcat 1 (doubleDec 0.5)
    , THU.testCase "doubleDec-I" $
        pack ("-0.5") @=? runConcat 1 (doubleDec (-0.5))
    , THU.testCase "doubleDec-J" $
        pack ("999999999") @=? runConcat 1 (doubleDec 999999999)
    , THU.testCase "doubleDec-K" $
        pack ("-99999999") @=? runConcat 1 (doubleDec (-99999999))
    , THU.testCase "shortTextJsonString-A" $
        pack ("\"hello\"") @=? runConcat 1 (shortTextJsonString "hello")
    , THU.testCase "shortTextJsonString-B" $
        pack ("\"\\\\_\\\"_/\"") @=? runConcat 1 (shortTextJsonString "\\_\"_/")
    , THU.testCase "shortTextJsonString-C" $
        pack ("\"Hi\\r\\nLo\"") @=? runConcat 1 (shortTextJsonString "Hi\r\nLo")
    , THU.testCase "shortTextJsonString-D" $
        pack ("\"Hi\\u001BLo\"") @=? runConcat 1 (shortTextJsonString "Hi\ESCLo")
    , THU.testCase "word-16-tree" $
        Word16Tree.expectedSmall @=? runConcat 1
          (Word16Tree.encode Word16Tree.exampleSmall)
    , THU.testCase "byteArray-small" $
        let a = replicateByte 3 0x50
            b = replicateByte 5 0x51
         in mconcat [a,b] @=? runConcat 1
              ( byteArray a <> byteArray b )
    , THU.testCase "byteArray-big" $
        let a = replicateByte 2105 0x50
            b = replicateByte 725 0x51
            c = replicateByte 900 0x52
            d = replicateByte 800 0x53
            e = replicateByte 700 0x54
            f = replicateByte 950 0x55
            g = replicateByte 975 0x56
            h = replicateByte 3000 0x57
            i = replicateByte 125 0x58
         in mconcat [a,b,c,d,e,f,g,h,i] @=? runConcat 1
              ( byteArray a <> byteArray b <> byteArray c <>
                byteArray d <> byteArray e <> byteArray f <>
                byteArray g <> byteArray h <> byteArray i
              )
    , TQC.testProperty "word16ArrayLE" $ \(xs :: [Word16]) ->
        let ys = Exts.fromList xs :: PrimArray Word16
         in runConcat 1 (foldMap word16LE xs)
            ===
            runConcat 1 (word16ArrayLE ys 0 (Prelude.length xs))
    , TQC.testProperty "word16ArrayBE" $ \(xs :: [Word16]) ->
        let ys = Exts.fromList xs :: PrimArray Word16
         in runConcat 1 (foldMap word16BE xs)
            ===
            runConcat 1 (word16ArrayBE ys 0 (Prelude.length xs))
    , TQC.testProperty "word32ArrayLE" $ \(xs :: [Word32]) ->
        let ys = Exts.fromList xs :: PrimArray Word32
         in runConcat 1 (foldMap word32LE xs)
            ===
            runConcat 1 (word32ArrayLE ys 0 (Prelude.length xs))
    , TQC.testProperty "word32ArrayBE" $ \(xs :: [Word32]) ->
        let ys = Exts.fromList xs :: PrimArray Word32
         in runConcat 1 (foldMap word32BE xs)
            ===
            runConcat 1 (word32ArrayBE ys 0 (Prelude.length xs))
    , TQC.testProperty "word64ArrayLE" $ \(xs :: [Word64]) ->
        let ys = Exts.fromList xs :: PrimArray Word64
         in runConcat 1 (foldMap word64LE xs)
            ===
            runConcat 1 (word64ArrayLE ys 0 (Prelude.length xs))
    , TQC.testProperty "word64ArrayBE" $ \(xs :: [Word64]) ->
        let ys = Exts.fromList xs :: PrimArray Word64
         in runConcat 1 (foldMap word64BE xs)
            ===
            runConcat 1 (word64ArrayBE ys 0 (Prelude.length xs))
    ]
  , testGroup "alternate"
    [ TQC.testProperty "HexWord64" $ \x y ->
        runConcat 1
          (  fromBounded Nat.constant (HexWord64.word64PaddedUpperHex x)
          <> fromBounded Nat.constant (HexWord64.word64PaddedUpperHex y)
          )
        ===
        pack (showWord64PaddedUpperHex x <> showWord64PaddedUpperHex y)
    ]
  ]

replicateByte :: Int -> Word8 -> ByteArray
replicateByte n w = runST $ do
  m <- PM.newByteArray n
  PM.setByteArray m 0 n w
  PM.unsafeFreezeByteArray m

pack :: String -> ByteArray
pack = Exts.fromList . map (fromIntegral @Int @Word8 . ord)

packUtf8 :: String -> ByteArray
packUtf8 = Exts.fromList . ByteString.unpack . TE.encodeUtf8 . T.pack

showWord64PaddedUpperHex :: Word64 -> String
showWord64PaddedUpperHex = printf "%016X" 

runConcat :: Int -> Builder -> ByteArray
runConcat n = Chunks.concat . run n