import os
import inspect
import globals
import sys

# the debug levels:
# 0 = minimum output (default)
# 1 = major stages
# 2 = verbose
# n = custom setting

def check(check,str):
    (frame, filename, line_number, function_name, lines,
     index) = inspect.getouterframes(inspect.currentframe())[1]
    if not check:
        sys.stderr.write("ERROR: file {0}: line {1}: {2}\n".format(os.path.basename(filename),line_number,str))
        assert 0

def error(str,return_value=0):
    (frame, filename, line_number, function_name, lines,
     index) = inspect.getouterframes(inspect.currentframe())[1]
    sys.stderr.write("ERROR: file {0}: line {1}: {2}\n".format(os.path.basename(filename),line_number,str))
    assert return_value==0

def warning(str):
    (frame, filename, line_number, function_name, lines,
     index) = inspect.getouterframes(inspect.currentframe())[1]
    sys.stderr.write("WARNING: file {0}: line {1}: {2}\n".format(os.path.basename(filename),line_number,str))


def info(lev, str):
    from globals import OPTS
    if (OPTS.debug_level >= lev):
        frm = inspect.stack()[1]
        mod = inspect.getmodule(frm[0])
        #classname = frm.f_globals['__name__']
        if mod.__name__ == None:
            class_name=""
        else:
            class_name=mod.__name__
        print("[{0}/{1}]: {2}".format(class_name,frm[0].f_code.co_name,str))