\begin{code}
-- | 
-- Maintainer : silva.samuel@alumni.uminho.pt
-- Stability  : experimental
-- Portability: portable
-- This module implements 
module Main  where
import qualified Text.XML.MusicXML as MusicXML
--import Music.Analysis.MusicXML2Haskore
--import Music.Analysis.MusicXML.Functions
import Control.Monad
import Data.List
import System.IO
import System.Environment
import System.Console.GetOpt

\end{code}

\begin{code}
-- |
warn :: String -> IO ()
warn msg = putStrLn msg >> hFlush stdout
-- |
version :: String
version = "0.1.2"
\end{code}

\begin{code}
-- |
data Option = Unknown
--            | MusicXML | Abstract | ABC | Lilypond | Haskore
--            | Format
--            | MusicXML2Abstract
--            | Abstract2ABC
--            | Abstract2Lilypond
--            | MusicXML2Haskore
            | Help 
            | Version
              deriving (Eq, Show)

-- |
options :: [OptDescr Option]
options = [
      Option ['v','V'] ["version"] (NoArg Version) "show version number"
    , Option ['h','H','?'] ["help"] (NoArg Help) "show help"
    
    ] 

-- |
header :: String -> String
header prog = "Usage: "++ prog ++" [OPTIONS...] FILES..."
\end{code}

\begin{code}
--Nothing Nothing
importMusicXML :: FilePath -> IO (Maybe MusicXML.MusicXMLDoc)
importMusicXML input = do
    musicxml <- MusicXML.read_FILE MusicXML.read_MusicXMLDoc input
    case MusicXML.isOK musicxml of
        True -> return (Just (MusicXML.fromOK musicxml))
        False -> putStrLn ("Can't read "++show input) >> return Nothing

\end{code}

\begin{code}
main :: IO ()
main = do
    argv <- getArgs
    prog <- getProgName
    case getOpt Permute options argv of
        (o,n,[]) | Help`elem`o -> putStrLn (usageInfo (header prog) options)
                 | Version`elem`o -> putStrLn (unwords [prog, version])
                 | otherwise -> mapM_ (\input -> do importMusicXML input) n
        (_,_,errs) -> putStrLn (unlines errs ++ usageInfo (header prog) options)
\end{code}

\begin{nocode}
-- |
main :: IO ()
main = do
    argv <- getArgs
    prog <- getProgName
    curdir <- getCurrentDirectory    
    case getOpt Permute options' argv of
       (o,n,[]) | Help'`elem`o -> putStrLn (usageInfo (header prog) options')
                | Version'`elem`o -> putStrLn (unwords [prog, version])
                | Check`elem`o -> 
                    mapM_ (maybe (return ()) 
                            (either (procScriptFile True) setCurrentDirectory) . 
                           parseOptions) (o ++ map Input' n) 
                    >> setCurrentDirectory curdir
                | otherwise -> 
                    mapM_ (maybe (return ()) 
                            (either (procScriptFile False) setCurrentDirectory) . 
                           parseOptions) (o ++ map Input' n) 
                    >> setCurrentDirectory curdir
       (_,_,errs) -> putStrLn (unlines errs ++ usageInfo (header prog) options')
\end{nocode}