from behave import step
from utils import IfcFile

@step('The IFC file "{file}" must be provided')
def step_impl(context, file):
    try:
        IfcFile.load(file)
    except:
        assert False, f'The file {file} could not be loaded'


@step('IFC data must use the {schema} schema')
def step_impl(context, schema):
    assert IfcFile.get().schema == schema, \
        'We expected a schema of {} but instead got {}'.format(
            schema, IfcFile.get().schema)


@step('The IFC file "{file}" is exempt from being provided')
def step_impl(context, file):
    pass


@step('No further requirements are specified because {reason}')
def step_impl(context, reason):
    pass


@step('The project name, code, or short identifier must be "{value}"')
def step_impl(context, value):
    project_value = getattr(IfcFile.get().by_type('IfcProject')[0], 'Name')
    assert project_value == value, 'We expected a value of "{}" but instead got "{}"'.format(
        value, project_value)


@step('The project must have a longer form name of "{value}"')
def step_impl(context, value):
    project_value = getattr(IfcFile.get().by_type('IfcProject')[0], 'LongName')
    assert project_value == value, 'We expected a value of "{}" but instead got "{}"'.format(
        value, project_value)


@step('The project must be described as "{value}"')
def step_impl(context, value):
    project_value = getattr(IfcFile.get().by_type('IfcProject')[0], 'Description')
    assert project_value == value, 'We expected a value of "{}" but instead got "{}"'.format(
        value, project_value)


@step('The project must be categorised under "{value}"')
def step_impl(context, value):
    project_value = getattr(IfcFile.get().by_type('IfcProject')[0], 'ObjectType')
    assert project_value == value, 'We expected a value of "{}" but instead got "{}"'.format(
        value, project_value)


@step('The project must contain information about the "{value}" phase')
def step_impl(context, value):
    project_value = getattr(IfcFile.get().by_type('IfcProject')[0], 'Phase')
    assert project_value == value, 'We expected a value of "{}" but instead got "{}"'.format(
        value, project_value)


@step('The project must contain 3D geometry representing the shape of objects')
def step_impl(context):
    assert get_subcontext('Body', 'Model', 'MODEL_VIEW')


@step('The project must contain 3D geometry representing clearance zones')
def step_impl(context):
    assert get_subcontext('Clearance', 'Model', 'MODEL_VIEW')


@step('The project must contain 3D geometry representing the center of gravity of objects')
def step_impl(context):
    assert get_subcontext('CoG', 'Model', 'MODEL_VIEW')


@step('The project must contain 3D geometry representing the object bounding boxes')
def step_impl(context):
    assert get_subcontext('Box', 'Model', 'MODEL_VIEW')


def get_subcontext(identifier, type, target_view):
    project = IfcFile.get().by_type('IfcProject')[0]
    for rep_context in project.RepresentationContexts:
        for subcontext in rep_context.HasSubContexts:
            if subcontext.ContextIdentifier == identifier \
                    and subcontext.ContextType == type \
                    and subcontext.TargetView == target_view:
                return True
    assert False, 'The subcontext with identifier {}, type {}, and target view {} could not be found'.format(
        identifier, type, target_view)