module NixTree.Clipboard
  ( copy,
  )
where

import Control.Exception (try)
import System.Exit
import qualified System.Process.Typed as P
import System.Timeout

cmds :: [(FilePath, [String])]
cmds =
  [ ("xsel", ["-i", "-b"]),
    ("xclip", ["-selection", "clipboard"]),
    ("wl-copy", []),
    ("pbcopy", [])
  ]

runCmd :: Text -> (FilePath, [String]) -> IO (Either Text ())
runCmd txt (cmd, args) =
  P.proc (toString cmd) (map toString args)
    & P.setStdin (P.byteStringInput $ encodeUtf8 txt)
    & P.readProcess
    & timeout 1_000_000
    & try
    <&> \case
      Right (Just (ExitSuccess, _, _)) -> Right ()
      Right (Just (ExitFailure e, out, err)) ->
        Left $
          "failed with exit code "
            <> show e
            <> ", "
            <> "stdout: "
            <> decodeUtf8 (toStrict out)
            <> ", "
            <> "stderr: "
            <> decodeUtf8 (toStrict err)
      Right Nothing ->
        Left $ "timed out"
      Left (ex :: SomeException) ->
        Left $ "failed with exception: " <> show ex
    <&> \case
      Right () -> Right ()
      Left err -> Left ("Running " <> show (cmd, args) <> " " <> err <> ".")

copy :: Text -> IO (Either [Text] ())
copy txt = go cmds []
  where
    go [] errs = return $ Left errs
    go (x : xs) errs =
      runCmd txt x >>= \case
        Right () -> return $ Right ()
        Left err -> go xs (err : errs)