{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}

module ExceptionSpec (main, spec) where

#if __GLASGOW_HASKELL__ < 709
import Control.Applicative
#endif
import Control.Concurrent.Async (withAsync)
import Control.Exception
import Control.Monad
import qualified Data.Streaming.Network as N
import Network.HTTP.Types hiding (Header)
import Network.Socket (close)
import Network.Wai hiding (Response, responseStatus)
import Network.Wai.Handler.Warp
import Network.Wai.Internal (Request (..))
import Test.Hspec

import HTTP

main :: IO ()
main = hspec spec

withTestServer :: (Int -> IO a) -> IO a
withTestServer inner = bracket
    (N.bindRandomPortTCP "127.0.0.1")
    (close . snd)
    $ \(prt, lsocket) -> do
        withAsync (runSettingsSocket defaultSettings lsocket testApp) $
            \_ -> inner prt

testApp :: Application
testApp (Network.Wai.Internal.Request{pathInfo = [x]}) f
    | x == "statusError" =
        f $ responseLBS undefined [] "foo"
    | x == "headersError" =
        f $ responseLBS ok200 undefined "foo"
    | x == "headerError" =
        f $ responseLBS ok200 [undefined] "foo"
    | x == "bodyError" =
        f $ responseLBS ok200 [] undefined
    | x == "ioException" = do
        void $ fail "ioException"
        f $ responseLBS ok200 [] "foo"
testApp _ f =
    f $ responseLBS ok200 [] "foo"

spec :: Spec
spec = describe "responds even if there is an exception" $ do
    {- Disabling these tests. We can consider forcing evaluation in Warp.
    it "statusError" $ do
        sc <- responseStatus <$> sendGET "http://127.0.0.1:2345/statusError"
        sc `shouldBe` internalServerError500
    it "headersError" $ do
        sc <- responseStatus <$> sendGET "http://127.0.0.1:2345/headersError"
        sc `shouldBe` internalServerError500
    it "headerError" $ do
        sc <- responseStatus <$> sendGET "http://127.0.0.1:2345/headerError"
        sc `shouldBe` internalServerError500
    it "bodyError" $ do
        sc <- responseStatus <$> sendGET "http://127.0.0.1:2345/bodyError"
        sc `shouldBe` internalServerError500
    -}
    it "ioException" $ withTestServer $ \prt -> do
        sc <-
            responseStatus <$> sendGET ("http://127.0.0.1:" ++ show prt ++ "/ioException")
        sc `shouldBe` internalServerError500
