module Update.UpdateTimer
  ( TimerAction(..)
  , updateTimer
  ) where

import Model.Timer (..)
import Model.Id (..)

type TimerAction =
  Restart
  | ToggleRunning
  | Stop

updateTimer : TimerAction -> Timer -> Timer
updateTimer action timer =
  case action of
    ToggleRunning ->
      { timer | isRunning <- timer.currentTime > 0.0 && not timer.isRunning }
    Restart ->
      { timer
      | isRunning <- True
      , currentTime <- initTime timer.initialTime
      }
    Stop ->
      { timer
      | isRunning <- False
      , currentTime <- initTime timer.initialTime
      }