{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ExistentialQuantification #-}

module Network.MoeSocks.Common where

import Control.Lens
import Control.Monad.Writer hiding (listen)
import Data.Text (Text)
import Data.Text.Strict.Lens (utf8)
import Data.Text.Lens
import Network.MoeSocks.Helper
import Network.MoeSocks.Type
import Network.Socket hiding (send, recv, recvFrom, sendTo)
import Prelude hiding ((-), take)
import qualified Data.List as L
import Network.MoeSocks.Internal.ShadowSocks.Encrypt

getCipher :: Text -> Text -> IO (Cipher, Cipher)
getCipher aMethod aPassword =
  getEncDec aMethod (review utf8 aPassword)

showAddressType :: AddressType -> Text
showAddressType (IPv4_address xs) = view (from _Text) - 
                                      concat - L.intersperse "." - 
                                      map show - xs ^.. each
showAddressType (Domain_name x)   = x 
showAddressType (IPv6_address xs) = view (from _Text) -
                                      concat - L.intersperse ":" - 
                                      map show - xs ^.. each

showConnectionType :: ConnectionType -> String
showConnectionType TCP_IP_stream_connection = "TCP_Stream"
showConnectionType TCP_IP_port_binding      = "TCP_Bind  "
showConnectionType UDP_port                 = "UDP       "

showRequest :: ClientRequest -> String
showRequest _r =  
                   view _Text (showAddressType (_r ^. addressType))
                <> ":"
                <> show (_r ^. portNumber)

initTarget :: ClientRequest -> IO (Socket, SockAddr)
initTarget _clientRequest = do
  let 
      connectionType_To_SocketType :: ConnectionType -> SocketType
      connectionType_To_SocketType TCP_IP_stream_connection = Stream
      connectionType_To_SocketType TCP_IP_port_binding = NoSocketType
      connectionType_To_SocketType UDP_port = Datagram
         
      _socketType = connectionType_To_SocketType -
                      _clientRequest ^. connectionType


      _hostName = _clientRequest ^. addressType . to showAddressType
      _port = _clientRequest ^. portNumber

  
  getSocket _hostName _port _socketType