module Crypto.Secp256k1.Tests (tests) where

import           Crypto.Secp256k1
import qualified Data.ByteString.Base16               as B16
import qualified Data.ByteString.Char8                as B8
import           Test.Framework                       (Test, testGroup)
import           Test.Framework.Providers.HUnit       (testCase)
import           Test.Framework.Providers.QuickCheck2 (testProperty)
import           Test.HUnit                           (Assertion, assertEqual)

tests :: [Test]
tests =
    [ testGroup "Signing"
        [ testProperty "Signing messages" signMsgTest
        , testProperty "Bad signatures" badSignatureTest
        ]
    , testGroup "Serialization"
        [ testProperty "Serialize public key" serializePubKeyTest
        , testProperty "Serialize signature" serializeSigTest
        , testProperty "Serialize secret key" serializeSecKeyTest
        ]
    , testGroup "Tweaks"
        [ testCase "Tweak add secret key" tweakAddSecKeyTest
        , testCase "Tweak multiply secret key" tweakMulSecKeyTest
        , testCase "Tweak add public key" tweakAddPubKeyTest
        , testCase "Tweak multiply public key" tweakMulPubKeyTest
        , testCase "Combine public keys" combinePubKeyTest
        ]
    ]

signMsgTest :: (Msg, SecKey) -> Bool
signMsgTest (fm, fk) = verifySig fp fg fm where
    fp = pubKey fk
    fg = signMsg fk fm

badSignatureTest :: (Msg, SecKey, PubKey) -> Bool
badSignatureTest (fm, fk, fp) =
    not $ verifySig fp fg fm
  where
    fg = signMsg fk fm

serializePubKeyTest :: (PubKey, Bool) -> Bool
serializePubKeyTest (fp, b) =
    case importPubKey $ exportPubKey b fp of
        Just fp' -> fp == fp'
        Nothing -> False

serializeSigTest :: (Msg, SecKey) -> Bool
serializeSigTest (fm, fk) =
    case importSig $ exportSig fg of
        Just fg' -> fg == fg'
        Nothing -> False
  where
    fg = signMsg fk fm

serializeSecKeyTest :: (SecKey, Bool) -> Bool
serializeSecKeyTest (fk, b) =
    case importSecKey $ exportSecKey b fk of
        Just fk' -> fk == fk'
        Nothing -> False

tweakAddSecKeyTest :: Assertion
tweakAddSecKeyTest =
    assertEqual "tweaked keys match" expected tweaked
  where
    tweaked = do
        key <- secKey $ fst $ B16.decode $ B8.pack $
            "f65255094d7773ed8dd417badc9fc045c1f80fdc5b2d25172b031ce6933e039a"
        twk <- tweak $ fst $ B16.decode $ B8.pack $
            "f5cbe7d88182a4b8e400f96b06128921864a18187d114c8ae8541b566c8ace00"
        tweakAddSecKey key twk
    expected = secKey $ fst $ B16.decode $ B8.pack $
        "ec1e3ce1cefa18a671d51125e2b249688d934b0e28f5d1665384d9b02f929059"

tweakMulSecKeyTest :: Assertion
tweakMulSecKeyTest =
    assertEqual "tweaked keys match" expected tweaked
  where
    tweaked = do
        key <- secKey $ fst $ B16.decode $ B8.pack $
            "f65255094d7773ed8dd417badc9fc045c1f80fdc5b2d25172b031ce6933e039a"
        twk <- tweak $ fst $ B16.decode $ B8.pack $
            "f5cbe7d88182a4b8e400f96b06128921864a18187d114c8ae8541b566c8ace00"
        tweakMulSecKey key twk
    expected = secKey $ fst $ B16.decode $ B8.pack $
        "a96f5962493acb179f60a86a9785fc7a30e0c39b64c09d24fe064d9aef15e4c0"

tweakAddPubKeyTest :: Assertion
tweakAddPubKeyTest =
    assertEqual "tweaked keys match" expected tweaked
  where
    tweaked = do
        pub <- importPubKey $ fst $ B16.decode $ B8.pack $
            "04dded4203dac96a7e85f2c374a37ce3e9c9a155a72b64b4551b0bfe779dd44705\
            \12213d5ed790522c042dee8e85c4c0ec5f96800b72bc5940c8bc1c5e11e4fcbf"
        twk <- tweak $ fst $ B16.decode $ B8.pack $
            "f5cbe7d88182a4b8e400f96b06128921864a18187d114c8ae8541b566c8ace00"
        tweakAddPubKey pub twk
    expected = importPubKey $ fst $ B16.decode $ B8.pack $
        "04441c3982b97576646e0df0c96736063df6b42f2ee566d13b9f6424302d1379e518fd\
        \c87a14c5435bff7a5db4552042cb4120c6b86a4bbd3d0643f3c14ad01368"

tweakMulPubKeyTest :: Assertion
tweakMulPubKeyTest =
    assertEqual "tweaked keys match" expected tweaked
  where
    tweaked = do
        pub <- importPubKey $ fst $ B16.decode $ B8.pack $
            "04dded4203dac96a7e85f2c374a37ce3e9c9a155a72b64b4551b0bfe779dd44705\
            \12213d5ed790522c042dee8e85c4c0ec5f96800b72bc5940c8bc1c5e11e4fcbf"
        twk <- tweak $ fst $ B16.decode $ B8.pack $
            "f5cbe7d88182a4b8e400f96b06128921864a18187d114c8ae8541b566c8ace00"
        tweakMulPubKey pub twk
    expected = importPubKey $ fst $ B16.decode $ B8.pack $
        "04f379dc99cdf5c83e433defa267fbb3377d61d6b779c06a0e4ce29ae3ff5353b12ae4\
        \9c9d07e7368f2ba5a446c203255ce912322991a2d6a9d5d5761c61ed1845"

combinePubKeyTest :: Assertion
combinePubKeyTest =
    assertEqual "combined keys match" expected combined
  where
    combined = do
        pub1 <- importPubKey $ fst $ B16.decode $ B8.pack
            "04dded4203dac96a7e85f2c374a37ce3e9c9a155a72b64b4551b0bfe779dd44705\
            \12213d5ed790522c042dee8e85c4c0ec5f96800b72bc5940c8bc1c5e11e4fcbf"
        pub2 <- importPubKey $ fst $ B16.decode $ B8.pack
            "0487d82042d93447008dfe2af762068a1e53ff394a5bf8f68a045fa642b99ea5d1\
            \53f577dd2dba6c7ae4cfd7b6622409d7edd2d76dd13a8092cd3af97b77bd2c77"
        pub3 <- importPubKey $ fst $ B16.decode $ B8.pack
            "049b101edcbe1ee37ff6b2318526a425b629e823d7d8d9154417880595a28000ee\
            \3febd908754b8ce4e491aa6fe488b41fb5d4bb3788e33c9ff95a7a9229166d59"
        combinePubKeys [pub1, pub2, pub3]
    expected = importPubKey $ fst $ B16.decode $ B8.pack
        "043d9a7ec70011efc23c33a7e62d2ea73cca87797e3b659d93bea6aa871aebde56c3bc\
        \6134ca82e324b0ab9c0e601a6d2933afe7fb5d9f3aae900f5c5dc6e362c8"