{-# LANGUAGE CPP #-}
{-
 Copyright (c) 2005-2006 Lemmih <lemmih@gmail.com>

 Permission to use, copy, modify, and distribute this software for any
 purpose with or without fee is hereby granted, provided that the above
 copyright notice and this permission notice appear in all copies.

 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-}
-----------------------------------------------------------------------------
-- C O N J U R E
--
-- How small a Bittorrent implementation can you actually do?
--
-- The current Bittorrent implementation is about 10.000 lines. Let us
-- beat that by lengths.
-----------------------------------------------------------------------------
module Main (main,run) where

import Conjure.Torrent
import Conjure.Network.Client
import Conjure.FileSystem.Interface as Interface
import Conjure.Logic.PeerManager
import Conjure.Network.Server
import Conjure.UI.Http
import Conjure.OptionParser
import Conjure.Utils.Logger
import Conjure.Debug

import Control.Concurrent
import Control.Concurrent.STM
import System.Environment (getArgs)
import Control.Monad (when)
import Control.Exception (finally)
#ifndef mingw32_HOST_OS
import System.Posix
#endif

import qualified Data.Map as Map
-- import Data.Map (Map)

-- FIXME: Logger options and log mask should be configurable.
main = do putStrLn "Conjure!"
#ifndef mingw32_HOST_OS
          installHandler sigPIPE Ignore Nothing
#endif
          openlog [PError] "conjure"
          initSTMLogger
          (args, files) <- (getArgs >>= getOpts)
          when (not $ null files) (run $ head files)
          closelog
          return ()

-- FIXME: This is only a temporary function.
--        We only need a single connPeer list, server, wantedDownload, wantedUploads and torrentMap
--        for all torrents.
run torrentPath
    = do mbTorrent <- readTorrentFile torrentPath
         case mbTorrent of
           Left err -> putStrLn err
           Right torrent
               -> do connectedPeers <- atomically $ newTVar []
                     seedingPeers <- atomically $ newTVar []
                     torrentMap <- atomically $ newTVar (Map.empty)
                     nSecs      <- atomically $ newTVar 10
                     -- Options:   Max peers, max downloads, max uploads, min optimistic
                     opts       <- atomically $ newTVar (50, 20, 10, 2)
                     forkIO (runMainChoker nSecs connectedPeers opts)
                     forkIO (httpServer connectedPeers torrentMap uiPort)
                     tid <- forkIO $ runServer connectedPeers torrentMap port
                     backend <- Interface.defaultOpen torrent
                     runClient port connectedPeers torrentMap torrent backend
                     atomically retry
                       `finally` do putStrLn "Shutting down."
                                    killThread tid
                                    shutdownAll torrentMap
                                    putStrLn "Done."
    where port = 3000
          uiPort = 3080