from behave import step
from utils import IfcFile, assert_attribute, assert_type

@step('The element {guid} is an {ifc_class} only')
def step_impl(context, guid, ifc_class):
    element = IfcFile.by_guid(guid)
    assert_type(element, ifc_class, is_exact=True)


@step('The element {guid} is an {ifc_class}')
def step_impl(context, guid, ifc_class):
    element = IfcFile.by_guid(guid)
    assert_type(element, ifc_class)


@step('The element {guid} is further defined as a {predefined_type}')
def step_impl(context, guid, predefined_type):
    element = IfcFile.by_guid(guid)
    if hasattr(element, 'PredefinedType') \
            and element.PredefinedType == 'USERDEFINED' \
            and hasattr(element,'ObjectType'):
        assert_attribute(element, 'ObjectType', predefined_type)
    elif hasattr(element, 'PredefinedType'):
        assert_attribute(element, 'PredefinedType', predefined_type)
    else:
        assert False, 'The element {} does not have a PredefinedType or ObjectType attribute'.format(element)


@step('The element {guid} should not exist because {reason}')
def step_impl(context, guid, reason):
    try:
        element = IfcFile.get().by_id(guid)
    except:
        return
    assert False, 'This element {} should be reevaluated.'.format(element)