module Main where

import MiniEffects.App (defaultEnv, renderError, runGreetingApp)
import System.Environment (getArgs)
import System.Exit (die)

main :: IO ()
main = do
  args <- getArgs
  let rawName =
        case args of
          [] -> "learner"
          firstArg : _ -> firstArg

  case runGreetingApp defaultEnv rawName of
    Left appError -> die (renderError appError)
    Right greeting -> putStrLn greeting