{-# LANGUAGE OverloadedStrings #-}

module ConnectSpec (spec) where

import           Control.Monad
import           Data.Aeson
import qualified Data.ByteString           as BS
import qualified Data.ByteString.Lazy      as LBS
import           Test.Hspec
import           Text.Printf
import           Transformers.Transformers
import           Types.Connect
import           Validators.Validators

spec :: Spec
spec = do
  transformationCases
  validationCases

explicitTransformationCases :: [(Connect, BS.ByteString)]
explicitTransformationCases = [
  (
    Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing,
    "CONNECT {\"verbose\": false, \"pedantic\": false, \"tls_required\": false, \"lang\": \"Haskell\", \"version\": \"1\"}"
    ),
  (
    Connect True True True (Just "token") (Just "user") (Just "pass") (Just "name") "Haskell" "1" (Just 3) (Just True) (Just "sig") (Just "jwt") (Just True) (Just True),
    "CONNECT {\"verbose\": true, \"pedantic\": true, \"tls_required\": true, \"auth_token\": \"token\", \"user\": \"user\", \"pass\": \"pass\", \"name\": \"name\", \"lang\": \"Haskell\", \"version\": \"1\", \"protocol\": 3, \"echo\": true, \"sig\": \"sig\", \"jwt\": \"jwt\", \"no_responders\": true, \"headers\": true}"
    ),
  (
    Connect True True True (Just "token") (Just "user") (Just "pass") (Just "name") "Haskell" "1.0.0" (Just 3) (Just True) (Just "sig") (Just "jwt") (Just False) (Just False),
    "CONNECT {\"verbose\": true, \"pedantic\": true, \"tls_required\": true, \"auth_token\": \"token\", \"user\": \"user\", \"pass\": \"pass\", \"name\": \"name\", \"lang\": \"Haskell\", \"version\": \"1.0.0\", \"protocol\": 3, \"echo\": true, \"sig\": \"sig\", \"jwt\": \"jwt\", \"no_responders\": false, \"headers\": false}"
    )
  ]

transformationCases = parallel $ do
  describe "CONNECT transformer" $ do
    forM_ explicitTransformationCases $ \(input, want) -> do
      it (printf "correctly transforms %s" (show input)) $ do
        let wantProto = BS.take 8 want
        let wantJSONString = BS.drop 8 want

        let transformed = transform input
        let gotProto = BS.take 8 transformed
        let gotJSONString = BS.drop 8 transformed

        -- decode both to avoid field ordering issues
        let wantJSON = decode . LBS.fromStrict $ wantJSONString :: Maybe Value
        let gotJSON = decode . LBS.fromStrict $ gotJSONString :: Maybe Value

        gotProto `shouldBe` wantProto
        gotJSON `shouldBe` wantJSON

explicitValidationCases :: [(Connect, Either BS.ByteString ())]
explicitValidationCases = [
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Right ()),
 (Connect False False False (Just "") Nothing Nothing Nothing "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty auth token"),
 (Connect False False False Nothing (Just "") Nothing Nothing "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty user"),
 (Connect False False False Nothing Nothing (Just "") Nothing "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty pass"),
 (Connect False False False Nothing Nothing Nothing (Just "") "Haskell" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty name"),
 (Connect False False False Nothing Nothing Nothing Nothing "" "1" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty lang"),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "" Nothing Nothing Nothing Nothing Nothing Nothing, Left "explicit empty version"),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" (Just 0) Nothing Nothing Nothing Nothing Nothing, Right ()),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" (Just 1) Nothing Nothing Nothing Nothing Nothing, Right ()),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" (Just 2) Nothing Nothing Nothing Nothing Nothing, Left "invalid protocol"),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" Nothing Nothing (Just "") Nothing Nothing Nothing, Left "explicit empty sig"),
 (Connect False False False Nothing Nothing Nothing Nothing "Haskell" "1" Nothing Nothing Nothing (Just "") Nothing Nothing, Left "explicit empty jwt")
 ]

validationCases = parallel $ do
  describe "CONNECT validater" $ do
    forM_ explicitValidationCases $ \(input, want) -> do
      it (printf "correctly validates %s" (show input)) $ do
        validate input `shouldBe` want