module DeriveNounTests (tests) where

import Data.Acquire
import Test.QuickCheck       hiding ((.&.))
import Test.Tasty
import Test.Tasty.QuickCheck
import Test.Tasty.TH
import UrbitPrelude
import Vere.Log
import Vere.Pier.Types
import Data.Conduit
import Data.Conduit.List

import Control.Concurrent (threadDelay, runInBoundThread)
import Data.LargeWord     (LargeKey(..))
import GHC.Natural        (Natural)

import qualified Vere.Log as Log


-- Sum Types -------------------------------------------------------------------

data Nums = One | Two | TwentyTwo | NineHundredNintyNine
  deriving (Eq, Show, Enum, Bounded)

data ThreeWords = ThreeWords Word Word Word
  deriving (Eq, Show)

data FooBar = FooBarQueenAlice Word Word
            | FooBarBob Word
            | FooBarCharlie
  deriving (Eq, Show)

data BarZaz = BZQueenAlice Word Word
            | BZBob Word
            | BZCharlie
  deriving (Eq, Show)

data ZazBaz = QueenAlice Word Word
            | Bob Word
            | Charlie
  deriving (Eq, Show)

data Empty

data Poly a b = PLeft a
              | PRite b
  deriving (Eq, Show)

deriveNoun ''Nums
deriveNoun ''ThreeWords
deriveNoun ''FooBar
deriveNoun ''BarZaz
deriveNoun ''ZazBaz
deriveNoun ''Empty
deriveNoun ''Poly

instance Arbitrary ThreeWords where
  arbitrary = ThreeWords <$> arbitrary <*> arbitrary <*> arbitrary

instance Arbitrary Nums where
  arbitrary = oneof (pure <$> [ minBound .. maxBound ])

instance Arbitrary FooBar where
  arbitrary = oneof [ FooBarQueenAlice <$> arbitrary <*> arbitrary
                    , FooBarBob        <$> arbitrary
                    , pure FooBarCharlie
                    ]

instance Arbitrary BarZaz where
  arbitrary = oneof [ BZQueenAlice <$> arbitrary <*> arbitrary
                    , BZBob        <$> arbitrary
                    , pure BZCharlie
                    ]

instance Arbitrary ZazBaz where
  arbitrary = oneof [ QueenAlice <$> arbitrary <*> arbitrary
                    , Bob        <$> arbitrary
                    , pure Charlie
                    ]

instance (Arbitrary a, Arbitrary b) => Arbitrary (Poly a b) where
  arbitrary = oneof [ PLeft <$> arbitrary
                    , PRite <$> arbitrary
                    ]


-- Utils -----------------------------------------------------------------------

roundTrip :: forall a. (Eq a, ToNoun a, FromNoun a) => a -> Bool
roundTrip x = Just x == fromNoun (toNoun x)

throughNoun :: (ToNoun a, FromNoun b) => a -> Maybe b
throughNoun = fromNoun . toNoun

nounEquiv :: (Eq a, Eq b, ToNoun a, ToNoun b, FromNoun a, FromNoun b)
          => (a -> b) -> a -> Bool
nounEquiv cvt x =
    and [ Just x == throughNoun y
        , Just y == throughNoun x
        ]
  where y = cvt x


-- Sanity Checks ---------------------------------------------------------------

enumSanity :: Nums -> Bool
enumSanity x = toNoun x == byHand x
  where
    byHand = \case
      One                  -> toNoun (Cord "one")
      Two                  -> toNoun (Cord "two")
      TwentyTwo            -> toNoun (Cord "twenty-two")
      NineHundredNintyNine -> toNoun (Cord "nine-hundred-ninty-nine")

recSanity :: ThreeWords -> Bool
recSanity x = toNoun x == byHand x
  where
    byHand (ThreeWords x y z) = toNoun (x, y, z)

sumSanity :: ZazBaz -> Bool
sumSanity x = toNoun x == byHand x
  where
    byHand = \case
      QueenAlice x y       -> toNoun (Cord "queen-alice", x, y)
      Bob x                -> toNoun (Cord "bob", x)
      Charlie              -> toNoun (Cord "charlie")

abbrPrefixSanity :: BarZaz -> Bool
abbrPrefixSanity x = toNoun x == byHand x
  where
    byHand = \case
      BZQueenAlice x y -> toNoun (Cord "queen-alice", x, y)
      BZBob x          -> toNoun (Cord "bob", x)
      BZCharlie        -> toNoun (Cord "charlie")

typePrefixSanity :: FooBar -> Bool
typePrefixSanity x = toNoun x == byHand x
  where
    byHand = \case
      FooBarQueenAlice x y -> toNoun (Cord "queen-alice", x, y)
      FooBarBob x          -> toNoun (Cord "bob", x)
      FooBarCharlie        -> toNoun (Cord "charlie")


-- Strip Sum Prefixes ----------------------------------------------------------

barZazBaz :: BarZaz -> Bool
barZazBaz = nounEquiv $ \case BZQueenAlice x y -> QueenAlice x y
                              BZBob x          -> Bob x
                              BZCharlie        -> Charlie

fooBarBaz :: FooBar -> Bool
fooBarBaz = nounEquiv $ \case FooBarQueenAlice x y -> QueenAlice x y
                              FooBarBob x          -> Bob x
                              FooBarCharlie        -> Charlie


--------------------------------------------------------------------------------

tests :: TestTree
tests =
  testGroup "Log"
    [ testProperty "Enum Sanity"                 $ enumSanity
    , testProperty "Sum Sanity"                  $ sumSanity
    , testProperty "Record Sanity"               $ recSanity
    , testProperty "Type-Prefix Sanity"          $ abbrPrefixSanity
    , testProperty "Abbrv-Prefix Sanity"         $ typePrefixSanity
    , testProperty "Round Trip Rec (Poly)"       $ roundTrip @(Poly Bool Bool)
    , testProperty "Round Trip Rec (ThreeWords)" $ roundTrip @ThreeWords
    , testProperty "Round Trip Enum (Nums)"      $ roundTrip @Nums
    , testProperty "Round Trip Sum (FooBar)"     $ roundTrip @FooBar
    , testProperty "Round Trip Sum (BarZaz)"     $ roundTrip @BarZaz
    , testProperty "Round Trip Sum (ZazBaz)"     $ roundTrip @ZazBaz
    , testProperty "Prefix Test 1"               $ barZazBaz
    , testProperty "Prefix Test 2"               $ fooBarBaz
    ]


-- Generate Arbitrary Values ---------------------------------------------------

arb :: Arbitrary a => Gen a
arb = arbitrary