module Main where


import Data.Char
import Data.List
import System.Directory
import System.FilePath
import System.FilePath.Find as F
import System.Info
import System.IO.Temp
import System.Process


main :: IO ()
main = putStrLn "-- Creating venzone release --\n" >>

       if isWin
         then error "Sorry, this packing script doesn't yet work on Windows."
       else

       -- rebuild
       callCommand "cabal new-clean"         >>
       callCommand "cabal new-build venzone" >>

       -- find exe
       F.find always exec "dist-newstyle" >>= \(e:_) ->

       -- temp folder
       withSystemTempDirectory
            "vpack"
            (callb e) >>
       return ()

    where
          exec :: FindClause Bool
          exec = -- correct name
                 ( fileName ==? "venzone" ||?
                   fileName ==? "venzone.exe" ) &&?
                 -- correct filetype
                 fileType ==? RegularFile

          -- exe filepath, tmpdir path
          callb :: FilePath -> FilePath -> IO ()
          callb we fp =
                -- crea dir structure
                let rd = fp </> "venzone"
                    sd = rd </> "stories" in
                createDirectory rd >>
                createDirectory sd >>

                -- muovi eseguibile qui
                copyFile we (rd </> "venzone") >>

                -- muovi readme qui
                copyFile ("." </> "assets" </> "readme.txt")
                         (rd </> "readme.txt") >>

                -- muovi livelli qui
                let ls = "." </> "stories"
                    f lp = copyFile (ls </> lp) (sd </> lp) in
                listDirectory ls >>= \ss ->
                mapM_ f ss       >>

                -- elimina gymnasium
                removeFile (sd </> "t_gymnasium.vns") >>

                sysCompress fp >>
                return ()


-- tmp-dir
sysCompress :: FilePath -> IO ()
sysCompress fp =
        withCurrentDirectory fp stripZip        >>
        copyFile (fp </> aName) ("." </> aName) >>
        putStrLn ("\n" ++ aName ++ " created!")
    where
          aName :: String
          aName = "venzone-" ++ os ++ "-" ++ arch ++ ".zip"

          stripZip :: IO ()
          stripZip =
                strip ("venzone" </> "venzone")                 >>
                callCommand ("zip -r " ++ aName ++ " venzone/")


-- hackish but works on wine
zipCommand :: String -> String -> String
zipCommand an fl
   | isWin     = "\"C:\\Program Files\\7-Zip\\7za.exe\" a -r " ++
                 an ++ " -w " ++ fl ++ " -mem=AES256"
   | otherwise = "zip -r " ++ an ++ " " ++ fl


strip :: FilePath -> IO ()
strip fp | isWin = return ()
         | otherwise = callCommand ("strip " ++ fp)

isWin :: Bool
isWin = isPrefixOf "windows" (map toLower os)