module Main ()
where

import System.IO
import System.Environment
import System.Exit

import Misc
import Parser
import Evaluator



main	:: IO ()
main	= 	(hSetBuffering stdout NoBuffering) >> getArgs >>= \args ->
			if length args /= 1 then usage
			else readFile (head args) `catch` (\ _ -> putStr "Error: Couldn't open source file.\n" >> exitWith (ExitFailure 1))
				>>= \source ->
					interact (run source)
					
run					:: String -> String -> String
run source input	= nodeTreeToString (evaluate (apply (parse source) (stringToNodeTree input)))
				
						
				
usage	:: IO ()
usage	= putStr "Usage: rhotorhi sourcecode.rho\n"