module Ribosome.Test.Tmux where

import Chiasma.Command.Pane (sendKeys)
import Chiasma.Data.TmuxError (TmuxError)
import Chiasma.Data.TmuxId (PaneId(PaneId))
import Chiasma.Monad.Stream (runTmux)
import Chiasma.Native.Api (TmuxNative(TmuxNative))
import Chiasma.Test.Tmux (TmuxTestConf)
import qualified Chiasma.Test.Tmux as Chiasma (tmuxGuiSpec, tmuxSpec, tmuxSpec')
import Control.Monad.Trans.Except (runExceptT)
import Data.DeepPrisms (DeepPrisms)
import Data.Default (Default(def))
import Data.Functor (void)
import qualified Neovim.Context.Internal as Internal (Config, newConfig, retypeConfig)
import Neovim.RPC.Common (RPCConfig, SocketType(UnixSocket), createHandle, newRPCConfig)
import System.FilePath ((</>))
import UnliftIO (throwString)
import UnliftIO.Directory (doesPathExist)
import UnliftIO.Exception (bracket)
import UnliftIO.Temporary (withTempDirectory)

import Ribosome.Config.Setting (updateSetting)
import Ribosome.Config.Settings (tmuxSocket)
import Ribosome.Control.Concurrent.Wait (waitIOPredDef)
import Ribosome.Control.Monad.Ribo (Ribo)
import Ribosome.Control.Ribosome (Ribosome(Ribosome), newRibosomeTMVar)
import Ribosome.Error.Report.Class (ReportError)
import Ribosome.Nvim.Api.RpcCall (RpcError)
import Ribosome.Plugin.RpcHandler (RpcHandler)
import Ribosome.Test.Embed (Runner, TestConfig(..), runTest, startHandlers)
import Ribosome.Test.Orphans ()
import Ribosome.Test.Unit (tempDir, uSpec)

startSocketHandlers :: FilePath -> TestConfig -> Internal.Config RPCConfig -> IO (IO ())
startSocketHandlers socket testConfig nvimConf = do
  handle <- createHandle (UnixSocket socket)
  startHandlers handle handle testConfig nvimConf

runTmuxNvim ::
  (RpcHandler e env m, ReportError e) =>
  TestConfig ->
  env ->
  m () ->
  FilePath ->
  IO ()
runTmuxNvim conf ribo specThunk socket = do
  nvimConf <- Internal.newConfig (pure Nothing) newRPCConfig
  let testCfg = Internal.retypeConfig ribo nvimConf
  bracket (startSocketHandlers socket conf nvimConf) id (const $ runTest conf testCfg specThunk)

externalNvimCmdline :: FilePath -> Text
externalNvimCmdline socket =
  "nvim --listen " <> toText socket <> " -n -u NONE -i NONE"

runGui ::
  (RpcHandler e env m, ReportError e) =>
  TmuxNative ->
  FilePath ->
  TestConfig ->
  env ->
  m () ->
  IO ()
runGui api temp conf ribo specThunk = do
  void $ runExceptT @TmuxError $ runTmux api $ sendKeys (PaneId 0) [toString $ externalNvimCmdline socket]
  _ <- waitIOPredDef (pure socket) doesPathExist
  runTmuxNvim conf ribo specThunk socket
  where
    socket = temp </> "nvim-socket"

unsafeGuiSpec ::
  (RpcHandler e env m, ReportError e) =>
  TmuxNative ->
  FilePath ->
  Runner m ->
  TestConfig ->
  env ->
  m () ->
  IO ()
unsafeGuiSpec api temp runner conf s specThunk =
  runGui api temp conf s $ runner conf specThunk

unsafeGuiSpecR ::
  (RpcHandler e (Ribosome env) m, ReportError e) =>
  TmuxNative ->
  FilePath ->
  Runner m ->
  TestConfig ->
  env ->
  m () ->
  IO ()
unsafeGuiSpecR api temp runner conf s specThunk = do
  tv <- newRibosomeTMVar s
  let ribo = Ribosome (tcPluginName conf) tv
  unsafeGuiSpec api temp runner conf ribo specThunk

guiSpec ::
  DeepPrisms e RpcError =>
  ReportError e =>
  TestConfig ->
  TmuxNative ->
  s ->
  Ribo s e () ->
  IO ()
guiSpec conf api env specThunk = do
  socketDir <- tempDir "tmux-socket"
  withTempDirectory socketDir "spec" run
  where
    run tempdir =
      unsafeGuiSpecR api tempdir uSpec conf env specThunk

withTmux ::
  DeepPrisms e RpcError =>
  Ribo s e () ->
  TmuxNative ->
  Ribo s e ()
withTmux thunk (TmuxNative (Just socket)) =
  updateSetting tmuxSocket socket *> thunk
withTmux _ _ =
  throwString "no socket in test tmux"

tmuxSpec ::
  Show s =>
  DeepPrisms e RpcError =>
  ReportError e =>
  Default s =>
  TestConfig ->
  s ->
  Ribo s e () ->
  IO ()
tmuxSpec conf env specThunk =
  Chiasma.tmuxSpec run
  where
    run api = guiSpec conf api env (withTmux specThunk api)

tmuxSpec' ::
  Show s =>
  DeepPrisms e RpcError =>
  ReportError e =>
  Default s =>
  TmuxTestConf ->
  TestConfig ->
  s ->
  Ribo s e () ->
  IO ()
tmuxSpec' tmuxConf conf env specThunk =
  Chiasma.tmuxSpec' tmuxConf run
  where
    run api = guiSpec conf api env (withTmux specThunk api)

tmuxSpecDef ::
  Show s =>
  DeepPrisms e RpcError =>
  ReportError e =>
  Default s =>
  Ribo s e () ->
  IO ()
tmuxSpecDef =
  tmuxSpec def def

tmuxGuiSpec ::
  DeepPrisms e RpcError =>
  ReportError e =>
  Default s =>
  TestConfig ->
  s ->
  Ribo s e () ->
  IO ()
tmuxGuiSpec conf env specThunk =
  Chiasma.tmuxGuiSpec run
  where
    run api = guiSpec conf api env (withTmux specThunk api)

tmuxGuiSpecDef ::
  DeepPrisms e RpcError =>
  ReportError e =>
  Default s =>
  Ribo s e () ->
  IO ()
tmuxGuiSpecDef =
  tmuxGuiSpec def def