{-# LANGUAGE OverloadedStrings, OverloadedLabels #-}
module Main where

import System.IO

import QuoteSource.DataImport
import Control.Concurrent hiding (readChan, writeChan)
import Control.Monad
import Control.Exception
import Control.Error.Util
import qualified GI.Gtk as Gtk
import Data.GI.Base
import Control.Concurrent.BoundedChan
import ATrade.Types
import QuoteSource.TableParsers.AllParamsTableParser
import QuoteSource.TableParser
import ATrade.QuoteSource.Server

import ATrade.Broker.TradeSinks.ZMQTradeSink
import ATrade.Broker.TradeSinks.TelegramTradeSink
import ATrade.Broker.Server
import Broker.PaperBroker
import Broker.QuikBroker

import System.Directory
import System.Timeout
import System.Log.Logger
import System.Log.Handler.Simple
import System.Log.Handler (setFormatter)
import System.Log.Formatter
import System.ZMQ4
import System.ZMQ4.ZAP

import qualified Data.Text as T
import Data.Maybe

import Control.Monad.Trans.Except

import Config

forkBoundedChan :: Int -> BoundedChan Tick -> IO (ThreadId, BoundedChan Tick, BoundedChan QuoteSourceServerData)
forkBoundedChan size sourceChan = do
  sink <- newBoundedChan size
  sinkQss <- newBoundedChan size
  tid <- forkIO $ forever $ do
      v <- readChan sourceChan
      writeChan sink v
      writeChan sinkQss (QSSTick v)

  return (tid, sink, sinkQss)


initLogging :: IO ()
initLogging = do
  handler <- streamHandler stderr DEBUG >>=
    (\x -> return $
      setFormatter x (simpleLogFormatter "$utcTime\t {$loggername} <$prio> -> $msg"))

  hSetBuffering stderr LineBuffering
  updateGlobalLogger rootLoggerName (setLevel DEBUG)
  updateGlobalLogger rootLoggerName (setHandlers [handler])

main :: IO ()
main = do
  initLogging
  infoM "main" "Loading config"
  config <- readConfig "quik-connector.config.json"

  infoM "main" "Config loaded"
  chan <- newBoundedChan 10000
  infoM "main" "Starting data import server"
  _ <- initDataImportServer [MkTableParser $ mkAllParamsTableParser "allparams"] chan "atrade"

  (forkId, c1, c2) <- forkBoundedChan 10000 chan

  broker <- mkPaperBroker c1 1000000 ["demo"]
  eitherBrokerQ <- runExceptT $ mkQuikBroker (dllPath config) (quikPath config) (quikAccounts config)
  case eitherBrokerQ of
    Left errmsg -> warningM "main" $ "Can't load quik broker: " ++ T.unpack errmsg
    Right brokerQ ->
      withContext (\ctx -> do
        withZapHandler ctx (\zap -> do
          zapSetWhitelist zap $ whitelist config
          zapSetBlacklist zap $ blacklist config

          case brokerClientCertificateDir config of
            Just certFile -> do
              certs <- loadCertificatesFromDirectory certFile
              forM_ certs (\cert -> zapAddClientCertificate zap cert)
            Nothing -> return ()

          serverCert <- case brokerServerCertPath config of
            Just certFile -> do
              eitherCert <- loadCertificateFromFile certFile
              case eitherCert of
                Left errorMessage -> do
                  warningM "main" $ "Unable to load server certificate: " ++ errorMessage
                  return Nothing
                Right cert -> return $ Just cert
            Nothing -> return Nothing
          let serverParams = defaultServerSecurityParams { sspDomain = Just "global",
            sspCertificate = serverCert }

          withZMQTradeSink ctx (tradeSink config) (\zmqTradeSink -> do
            withTelegramTradeSink (telegramToken config) (telegramChatId config) (\telegramTradeSink -> do
              bracket (startQuoteSourceServer c2 ctx (T.pack $ quotesourceEndpoint config)) stopQuoteSourceServer (\_ -> do
                bracket (startBrokerServer [broker, brokerQ] ctx (T.pack $ brokerserverEndpoint config) [telegramTradeSink, zmqTradeSink] serverParams) stopBrokerServer (\_ -> do
                  void $ Gtk.init Nothing
                  window <- new Gtk.Window [ #title := "Quik connector" ]
                  void $ on window #destroy Gtk.mainQuit
                  #showAll window
                  Gtk.main)
                infoM "main" "BRS down")
              debugM "main" "QS done")
            debugM "main" "TGTS done")
          debugM "main" "ZMQTS done")
        debugM "main" "ZAP done")
  void $ timeout 1000000 $ killThread forkId
  infoM "main" "Main thread done"

loadCertificatesFromDirectory :: FilePath -> IO [CurveCertificate]
loadCertificatesFromDirectory filepath = do
  files <- listDirectory filepath
  catMaybes <$> forM files (\file -> hush <$> loadCertificateFromFile file)