import           Control.Concurrent           (forkIO, threadDelay)
import           Control.Concurrent.Async     (wait)
import           Control.Monad                (unless)
import           System.Console.AsciiProgress

main :: IO ()
main = displayConsoleRegions $ do
    pg1 <- newProgressBar def { pgWidth = 100
                              , pgOnCompletion = Just "pg 1 is Done!"
                              }
    _ <- forkIO $ loop pg1 (100 * 1000)

    pg2 <- newProgressBar def { pgWidth = 100
                              , pgOnCompletion = Just "pg 2 is Done!"
                              }
    _ <- forkIO $ loop pg2 (400 * 1000)

    pg3 <- newProgressBar def { pgWidth = 100
                              , pgOnCompletion = Just "pg 3 is Done!"
                              }
    _ <- forkIO $ loop pg3 (200 * 1000)

    wait $ pgFuture pg1
    wait $ pgFuture pg2
    wait $ pgFuture pg3
  where
    loop pg ts = do
        b <- isComplete pg
        unless b $ do
            threadDelay ts
            tick pg
            loop pg ts