import collections
import inspect

import obnamlib


def get_modules(module):
    objs = [getattr(module, name) for name in dir(module)]
    return [x for x in objs if inspect.ismodule(x)]


def get_modules_recursively(module):
    result = []
    queue = get_modules(module)
    while queue:
        item = queue.pop()
        if item not in result:
            result.append(item)
            queue.extend(get_modules(item))
    return result


def get_obnam_errors(module):

    def is_obnam_error(obj):
        return (type(obj) is type and
                issubclass(x, obnamlib.ObnamError) and
                hasattr(x, 'msg'))

    objs = [getattr(module, name) for name in dir(module)]
    return [x for x in objs if is_obnam_error(x)]


def get_obnam_errors_recursively(module):
    modules = get_modules_recursively(obnamlib)
    errors = set()
    for module in modules:
        for error in get_obnam_errors(module):
            errors.add(error)
    return errors


def dump(msg, things):
    print msg
    for x in things:
        print '  ', repr(x)



for error_class in get_obnam_errors_recursively(obnamlib):
    e = error_class()
    print e.id, e.msg