module Main where

import Control.Monad
import System.Environment
import System.Exit

-- import AST
import Interpreter
import Parser


main :: IO ()
main = do
    args <- getArgs
    when (length args == 0) $ die "Pass source file as parameter"
    let fname = head args
    src <- readFile fname
    let eprog = parseProgram (Just fname) src
    prog <- either (die . show) return eprog
    -- print prog
    -- putStrLn $ astPretty prog
    let (merr, output, _) = interpret prog

    maybe (putStrLn "[No errors]") (putStrLn . ("ERROR: " ++)) merr
    putStrLn "OUTPUT:"
    putStrLn output