-----------------------------------------------------------------------------
-- |
-- Module      :  System.Dir
-- Copyright   :  (c) 2020-2021 EMQ Technologies Co., Ltd.
-- License     :  BSD-style (see the LICENSE file)
--
-- Maintainer  :  Feng Lee, feng@emqx.io
--                Yang M, yangm@emqx.io
-- Stability   :  experimental
-- Portability :  portable
--
-- The System Directory module.
--
-----------------------------------------------------------------------------
module System.Dir
  ( makeDir
  , makeDirs
  , listDir
  , deleteDir
  , deleteDirRecursively
  , renameDir
  , getCwd
  , setCwd
  , copyFile
  , deleteFile
  , renameFile
  , getFileSize
  , makeLink
  , makeSymLink
  , deleteLink
  , getLastModified
  , module System.IO.Types
  ) where

import Control.Monad (IO)
import Data.DateTime (DateTime) -- FIXME later
import Data.Unit (Unit)
import Foreign (ffiIO1)
import System.IO.Types (FilePath)

-----------------------------------------------------------------------------
-- | Directory operations
-----------------------------------------------------------------------------

-- | Create directory.
foreign import makeDir :: FilePath -> IO ()

-- | Create directory recursively.
foreign import makeDirs :: FilePath -> IO ()

-- | List directories.
foreign import listDir :: FilePath -> IO [FilePath]

-- | Delete directory.
foreign import deleteDir :: FilePath -> IO ()

-- | Delete directory recursively.
-- | OTP 23.0
foreign import deleteDirRecursively :: FilePath -> IO ()

-- | Rename a directory.
renameDir :: FilePath -> FilePath -> IO ()
renameDir = renameFile

-----------------------------------------------------------------------------
-- | Current, home, and temporary directories
-----------------------------------------------------------------------------

-- TODO: os.chdir()

-- | Returns the current working directory.
foreign import getCwd :: IO FilePath

-- | Set the current working directory.
foreign import setCwd :: FilePath -> IO ()

{-
foreign import getHomeDir :: IO FilePath
foreign import getTempDir :: IO FilePath
-}

-----------------------------------------------------------------------------
-- | File operations
-----------------------------------------------------------------------------

-- | Copy a file.
foreign import copyFile :: FilePath -> FilePath -> IO ()

-- | Delete a File.
foreign import deleteFile :: FilePath -> IO ()

-- | Rename a directory.
foreign import renameFile :: FilePath -> FilePath -> IO ()

getFileSize :: FilePath -> IO Integer
getFileSize = ffiIO1 :filelib :file_size

-- foreign import makeAbsolute :: FilePath -> IO FilePath

-----------------------------------------------------------------------------
-- | Symbolic links
-----------------------------------------------------------------------------

foreign import makeLink :: FilePath -> FilePath -> IO ()

foreign import makeSymLink :: FilePath -> FilePath -> IO ()

deleteLink :: FilePath -> IO ()
deleteLink = deleteFile

-----------------------------------------------------------------------------
-- | File timestamps
-----------------------------------------------------------------------------

foreign import getLastModified :: FilePath -> IO DateTime