{-# LANGUAGE CPP #-}
module Affection.Logging where

import Debug.Trace

data LogLevel
  = Verbose
  | Debug
  | Warn
  | Error

log :: LogLevel -> String -> a -> a
#if defined(VERBOSE)
log Verbose s = trace ("VERBOSE: " ++ s)
#endif
#if defined(DEBUG) || defined(VERBOSE)
log Debug s = trace ("DEBUG: " ++ s)
#endif
#if defined(WARN) || defined(DEBUG) || defined(VERBOSE)
log Warn s = trace ("WARN: " ++ s)
#endif
#if defined(ERROR) || defined(WARN) || defined(DEBUG) || defined(VERBOSE)
log Error s = trace ("ERROR: " ++ s)
#endif
log _ _ = id

logIO :: LogLevel -> String -> IO ()
#if defined(VERBOSE)
logIO Verbose s = traceIO ("VERBOSE: " ++ s)
#endif
#if defined(DEBUG) || defined(VERBOSE)
logIO Debug s = traceIO ("DEBUG: " ++ s)
#endif
#if defined(WARN) || defined(DEBUG) || defined(VERBOSE)
logIO Warn s = traceIO ("WARN: " ++ s)
#endif
#if defined(ERROR) || defined(WARN) || defined(DEBUG) || defined(VERBOSE)
logIO Error s = traceIO ("ERROR: " ++ s)
#endif
logIO _ _ = return ()