{-# LANGUAGE OverloadedStrings #-}
module Main where

import Control.Monad
import Control.Exception
import Control.Concurrent
import Control.Concurrent.Async

import Data.Int
import Data.Monoid
import qualified Data.ByteString.Lazy as LBS

import System.Socket
import System.Socket.Family.Inet as Inet

main :: IO ()
main = do
  bracket
      ( do  server <- socket `onException` print "E01" :: IO (Socket Inet Stream TCP)
            client <- socket `onException` print "E02" :: IO (Socket Inet Stream TCP)
            return (server, client)
      )
      (\(server,client)-> do
            close server                                        `onException` print "E03"
            close client                                        `onException` print "E04"
      )
      (\(server,client)-> do
            bind server addr                                    `onException` print "E06"
            listen server 5                                     `onException` print "E07"

            connect client addr                                 `onException` print "E08"
            (peerSock, _) <- accept server                      `onException` print "E09"
            _ <- send client "This should be received." mempty  `onException` print "E10"
            _ <- receive peerSock 4096 mempty                   `onException` print "E11"
            close peerSock                                      `onException` print "E12"

            threadDelay 1000000

            e1 <- try $ send client "This might fail."  mempty  `onException` print "E13"
            case e1 of
              Right _ -> return ()
              Left  e -> if e == ePipe
                           then return ()
                           else throwIO e                       `onException` print "E14"

            threadDelay 1000000

            e2 <- try $ send client "This should fail." mempty  `onException` print "E15"
            case e2 of
              Right _ -> error "E16"
              Left e  -> if e == ePipe
                           then return ()
                           else throwIO e                       `onException` print "E17"
      )
  where
    addr          = SocketAddressInet Inet.loopback 7777