{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedLists #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeApplications #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}

module NtfClient where

import Control.Monad
import Control.Monad.Except (runExceptT)
import Control.Monad.IO.Unlift
import Data.Aeson (FromJSON (..), ToJSON (..), (.:))
import qualified Data.Aeson as J
import qualified Data.Aeson.Types as JT
import Data.ByteString.Builder (lazyByteString)
import Data.ByteString.Char8 (ByteString)
import Data.List.NonEmpty (NonEmpty)
import Data.Text (Text)
import GHC.Generics (Generic)
import Network.HTTP.Types (Status)
import qualified Network.HTTP.Types as N
import qualified Network.HTTP2.Server as H
import Network.Socket
import SMPClient (serverBracket)
import Simplex.Messaging.Client (chooseTransportHost, defaultNetworkConfig)
import Simplex.Messaging.Client.Agent (defaultSMPClientAgentConfig)
import qualified Simplex.Messaging.Crypto as C
import Simplex.Messaging.Encoding
import Simplex.Messaging.Notifications.Server (runNtfServerBlocking)
import Simplex.Messaging.Notifications.Server.Env
import Simplex.Messaging.Notifications.Server.Push.APNS
import Simplex.Messaging.Notifications.Server.Push.APNS.Internal
import Simplex.Messaging.Notifications.Transport
import Simplex.Messaging.Protocol
import Simplex.Messaging.Transport
import Simplex.Messaging.Transport.Client
import Simplex.Messaging.Transport.HTTP2 (HTTP2Body (..), http2TLSParams)
import Simplex.Messaging.Transport.HTTP2.Server
import Simplex.Messaging.Transport.Server
import Test.Hspec
import UnliftIO.Async
import UnliftIO.Concurrent
import qualified UnliftIO.Exception as E
import UnliftIO.STM

testHost :: NonEmpty TransportHost
testHost = "localhost"

ntfTestPort :: ServiceName
ntfTestPort = "6001"

ntfTestPort2 :: ServiceName
ntfTestPort2 = "6002"

apnsTestPort :: ServiceName
apnsTestPort = "6010"

testKeyHash :: C.KeyHash
testKeyHash = "LcJUMfVhwD8yxjAiSaDzzGF3-kLG4Uh0Fl_ZIjrRwjI="

ntfTestStoreLogFile :: FilePath
ntfTestStoreLogFile = "tests/tmp/ntf-server-store.log"

testNtfClient :: (Transport c, MonadUnliftIO m, MonadFail m) => (THandle c -> m a) -> m a
testNtfClient client = do
  Right host <- pure $ chooseTransportHost defaultNetworkConfig testHost
  runTransportClient defaultTransportClientConfig Nothing host ntfTestPort (Just testKeyHash) $ \h -> do
    g <- liftIO C.newRandom
    ks <- atomically $ C.generateKeyPair g
    liftIO (runExceptT $ ntfClientHandshake h ks testKeyHash supportedNTFServerVRange) >>= \case
      Right th -> client th
      Left e -> error $ show e

ntfServerCfg :: NtfServerConfig
ntfServerCfg =
  NtfServerConfig
    { transports = [],
      subIdBytes = 24,
      regCodeBytes = 32,
      clientQSize = 1,
      subQSize = 1,
      pushQSize = 1,
      smpAgentCfg = defaultSMPClientAgentConfig,
      apnsConfig =
        defaultAPNSPushClientConfig
          { apnsPort = apnsTestPort,
            caStoreFile = "tests/fixtures/ca.crt"
          },
      subsBatchSize = 900,
      inactiveClientExpiration = Just defaultInactiveClientExpiration,
      storeLogFile = Nothing,
      -- CA certificate private key is not needed for initialization
      caCertificateFile = "tests/fixtures/ca.crt",
      privateKeyFile = "tests/fixtures/server.key",
      certificateFile = "tests/fixtures/server.crt",
      -- stats config
      logStatsInterval = Nothing,
      logStatsStartTime = 0,
      serverStatsLogFile = "tests/ntf-server-stats.daily.log",
      serverStatsBackupFile = Nothing,
      transportConfig = defaultTransportServerConfig
    }

withNtfServerStoreLog :: ATransport -> (ThreadId -> IO a) -> IO a
withNtfServerStoreLog t = withNtfServerCfg ntfServerCfg {storeLogFile = Just ntfTestStoreLogFile, transports = [(ntfTestPort, t)]}

withNtfServerThreadOn :: ATransport -> ServiceName -> (ThreadId -> IO a) -> IO a
withNtfServerThreadOn t port' = withNtfServerCfg ntfServerCfg {transports = [(port', t)]}

withNtfServerCfg :: HasCallStack => NtfServerConfig -> (ThreadId -> IO a) -> IO a
withNtfServerCfg cfg@NtfServerConfig {transports} =
  case transports of
    [] -> error "no transports configured"
    _ ->
      serverBracket
        (\started -> runNtfServerBlocking started cfg)
        (pure ())

withNtfServerOn :: ATransport -> ServiceName -> IO a -> IO a
withNtfServerOn t port' = withNtfServerThreadOn t port' . const

withNtfServer :: ATransport -> IO a -> IO a
withNtfServer t = withNtfServerOn t ntfTestPort

runNtfTest :: forall c a. Transport c => (THandle c -> IO a) -> IO a
runNtfTest test = withNtfServer (transport @c) $ testNtfClient test

ntfServerTest ::
  forall c smp.
  (Transport c, Encoding smp) =>
  TProxy c ->
  (TransmissionAuth, ByteString, ByteString, smp) ->
  IO (TransmissionAuth, ByteString, ByteString, BrokerMsg)
ntfServerTest _ t = runNtfTest $ \h -> tPut' h t >> tGet' h
  where
    tPut' :: THandle c -> (TransmissionAuth, ByteString, ByteString, smp) -> IO ()
    tPut' h@THandle {sessionId} (sig, corrId, queueId, smp) = do
      let t' = smpEncode (sessionId, corrId, queueId, smp)
      [Right ()] <- tPut h [Right (sig, t')]
      pure ()
    tGet' h = do
      [(TAuthNone, _, (CorrId corrId, qId, Right cmd))] <- tGet h
      pure (TAuthNone, corrId, qId, cmd)

ntfTest :: Transport c => TProxy c -> (THandle c -> IO ()) -> Expectation
ntfTest _ test' = runNtfTest test' `shouldReturn` ()

data APNSMockRequest = APNSMockRequest
  { notification :: APNSNotification,
    sendApnsResponse :: APNSMockResponse -> IO ()
  }

data APNSMockResponse = APNSRespOk | APNSRespError Status Text

data APNSMockServer = APNSMockServer
  { action :: Async (),
    apnsQ :: TBQueue APNSMockRequest,
    http2Server :: HTTP2Server
  }

apnsMockServerConfig :: HTTP2ServerConfig
apnsMockServerConfig =
  HTTP2ServerConfig
    { qSize = 1,
      http2Port = apnsTestPort,
      bufferSize = 16384,
      bodyHeadSize = 16384,
      serverSupported = http2TLSParams,
      caCertificateFile = "tests/fixtures/ca.crt",
      privateKeyFile = "tests/fixtures/server.key",
      certificateFile = "tests/fixtures/server.crt",
      transportConfig = defaultTransportServerConfig
    }

withAPNSMockServer :: (APNSMockServer -> IO ()) -> IO ()
withAPNSMockServer = E.bracket (getAPNSMockServer apnsMockServerConfig) closeAPNSMockServer

deriving instance Generic APNSAlertBody

instance FromJSON APNSAlertBody where
  parseJSON (J.Object v) = do
    title <- v .: "title"
    subtitle <- v .: "subtitle"
    body <- v .: "body"
    pure APNSAlertObject {title, subtitle, body}
  parseJSON (J.String v) = pure $ APNSAlertText v
  parseJSON invalid = JT.prependFailure "parsing Coord failed, " (JT.typeMismatch "Object" invalid)

deriving instance Generic APNSNotificationBody

instance FromJSON APNSNotificationBody where parseJSON = J.genericParseJSON apnsJSONOptions {J.rejectUnknownFields = True}

deriving instance Generic APNSNotification

deriving instance FromJSON APNSNotification

deriving instance Generic APNSErrorResponse

deriving instance ToJSON APNSErrorResponse

getAPNSMockServer :: HTTP2ServerConfig -> IO APNSMockServer
getAPNSMockServer config@HTTP2ServerConfig {qSize} = do
  http2Server <- getHTTP2Server config
  apnsQ <- newTBQueueIO qSize
  action <- async $ runAPNSMockServer apnsQ http2Server
  pure APNSMockServer {action, apnsQ, http2Server}
  where
    runAPNSMockServer apnsQ HTTP2Server {reqQ} = forever $ do
      HTTP2Request {reqBody = HTTP2Body {bodyHead}, sendResponse} <- atomically $ readTBQueue reqQ
      let sendApnsResponse = \case
            APNSRespOk -> sendResponse $ H.responseNoBody N.ok200 []
            APNSRespError status reason ->
              sendResponse . H.responseBuilder status [] . lazyByteString $ J.encode APNSErrorResponse {reason}
      case J.decodeStrict' bodyHead of
        Just notification ->
          atomically $ writeTBQueue apnsQ APNSMockRequest {notification, sendApnsResponse}
        _ -> do
          putStrLn $ "runAPNSMockServer J.decodeStrict' error, reqBody: " <> show bodyHead
          sendApnsResponse $ APNSRespError N.badRequest400 "bad_request_body"

closeAPNSMockServer :: APNSMockServer -> IO ()
closeAPNSMockServer APNSMockServer {action, http2Server} = do
  closeHTTP2Server http2Server
  uninterruptibleCancel action