-- This file is part of the Wire Server implementation.
--
-- Copyright (C) 2025 Wire Swiss GmbH <opensource@wire.com>
--
-- This program is free software: you can redistribute it and/or modify it under
-- the terms of the GNU Affero General Public License as published by the Free
-- Software Foundation, either version 3 of the License, or (at your option) any
-- later version.
--
-- This program is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-- FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
-- details.
--
-- You should have received a copy of the GNU Affero General Public License along
-- with this program. If not, see <https://www.gnu.org/licenses/>.

module Data.Time.Clock.DiffTime
  ( DiffTime,
    secondsToDiffTime,
    millisecondsToDiffTime,
    picosecondsToDiffTime,
    diffTimeToFullMicroseconds,
    diffTimeToPicoseconds,
  )
where

import Data.Time
import Imports

-- FUTUREWORK: we really should be doing all this with https://hackage.haskell.org/package/units...
millisecondsToDiffTime :: Integer -> DiffTime
millisecondsToDiffTime = picosecondsToDiffTime . (e9 *)

-- | Rounds down. Useful for 'threadDelay', 'timeout', etc.
diffTimeToFullMicroseconds :: DiffTime -> Int
diffTimeToFullMicroseconds = fromInteger . (`div` e6) . diffTimeToPicoseconds

e6, e9 :: Integer
e6 = 1_000_000
e9 = 1_000_000_000
