--
-- Copyright (c) 2009-2012   Stefan Wehr - http://www.stefanwehr.de
--
-- This library is free software; you can redistribute it and/or
-- modify it under the terms of the GNU Lesser General Public
-- License as published by the Free Software Foundation; either
-- version 2.1 of the License, or (at your option) any later version.
--
-- This library is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-- Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public
-- License along with this library; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
--

module Test.Framework.TestConfig (

    TestConfig(..), defaultTestConfig, ReportLevel(..), report
  , useColors

) where

import Data.Char (toLower)
import Control.Monad (unless)
import System.IO

import System.Posix.Terminal
import System.Posix.IO (stdOutput)
import System.Posix.Types (Fd)
import System.Posix.Env (getEnv)

data TestConfig = TestConfig { tc_quiet :: Bool }
                deriving (Read,Show,Eq)

defaultTestConfig :: TestConfig
defaultTestConfig = TestConfig { tc_quiet = False }

data ReportLevel = Debug | Info
                 deriving (Eq,Ord)

reportHandle :: Handle
reportHandle = stdout -- keep in sync with reportFd!

reportFd :: Fd
reportFd = stdOutput -- keep in sync with reportHandle!

report :: TestConfig -> ReportLevel -> String -> IO ()
report tc level msg =
    unless (tc_quiet tc && level < Info) $ do hPutStrLn reportHandle msg
                                              hFlush reportHandle

useColors :: IO Bool
useColors =
    do mterm <- getEnv "TERM"
       case mterm of
         Nothing -> return False
         Just s | map toLower s == "dump" -> return False
         _ -> do mx <- getEnv "HTF_NO_COLORS"
                 case mx of
                   Just s | map toLower s `elem` ["", "1", "y", "yes", "true"] -> return False
                   _ -> queryTerminal reportFd