{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}

module Snap.Util.FileServe.Tests
  ( tests ) where

import           Control.Monad
import           Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as B
import qualified Data.ByteString.Lazy.Char8 as L
import           Data.IORef
import qualified Data.Map as Map
import           Data.Maybe
import           Prelude hiding (take)
import           Test.Framework
import           Test.Framework.Providers.HUnit
import           Test.HUnit hiding (Test, path)

import           Snap.Internal.Http.Types
import           Snap.Internal.Types
import           Snap.Util.FileServe
import           Snap.Iteratee

tests :: [Test]
tests = [ testFs ]


expect404 :: IO Response -> IO ()
expect404 m = do
    r <- m
    assertBool "expected 404" (rspStatus r == 404)


getBody :: Response -> IO L.ByteString
getBody r = liftM fromWrap ((rspBodyToEnum $ rspBody r) stream2stream >>= run)


go :: Snap a -> ByteString -> IO Response
go m s = do
    rq <- mkRequest s
    liftM snd (run $ runSnap m (const $ return ()) rq)

goIfModifiedSince :: Snap a -> ByteString -> ByteString -> IO Response
goIfModifiedSince m s lm = do
    rq <- mkRequest s
    let r = setHeader "if-modified-since" lm rq
    liftM snd (run $ runSnap m (const $ return ()) r)


mkRequest :: ByteString -> IO Request
mkRequest uri = do
    enum <- newIORef $ SomeEnumerator return
    return $ Request "foo" 80 "foo" 999 "foo" 1000 "foo" False Map.empty
                     enum Nothing GET (1,1) [] "" uri "/"
                     (B.concat ["/",uri]) "" Map.empty

fs :: Snap ()
fs = fileServe "data/fileServe"

testFs :: Test
testFs = testCase "fileServe" $ do
    r1 <- go fs "foo.bin"
    b1 <- getBody r1

    assertEqual "foo.bin" "FOO\n" b1
    assertEqual "foo.bin content-type"
                (Just "application/octet-stream")
                (getHeader "content-type" r1)

    assertEqual "foo.bin size" (Just 4) (rspContentLength r1)

    assertBool "last-modified header" (isJust $ getHeader "last-modified" r1)
    let !lm = fromJust $ getHeader "last-modified" r1

    -- check last modified stuff
    r2 <- goIfModifiedSince fs "foo.bin" lm
    assertEqual "foo.bin 304" 304 $ rspStatus r2

    r3 <- goIfModifiedSince fs "foo.bin" "Wed, 15 Nov 1995 04:58:08 GMT"
    assertEqual "foo.bin 200" 200 $ rspStatus r3
    b3 <- getBody r3
    assertEqual "foo.bin 2" "FOO\n" b3

    r4 <- go fs "foo.txt"
    b4 <- getBody r4

    assertEqual "foo.txt" "FOO\n" b4
    assertEqual "foo.txt content-type"
                (Just "text/plain")
                (getHeader "content-type" r4)
    
    r5 <- go fs "foo.html"
    b5 <- getBody r5

    assertEqual "foo.html" "FOO\n" b5
    assertEqual "foo.html content-type"
                (Just "text/html")
                (getHeader "content-type" r5)
    
    r6 <- go fs "foo.bin.bin.bin"
    b6 <- getBody r6

    assertEqual "foo.bin.bin.bin" "FOO\n" b6
    assertEqual "foo.bin.bin.bin content-type"
                (Just "application/octet-stream")
                (getHeader "content-type" r6)

    expect404 $ go fs "jfldksjflksd"
    expect404 $ go fs "dummy/../foo.txt"
    expect404 $ go fs "/etc/password"

    coverMimeMap


coverMimeMap :: (Monad m) => m ()
coverMimeMap = mapM_ f $ Map.toList defaultMimeTypes
  where
    f (!k,!v) = return $ case k `seq` v `seq` () of () -> ()