# IfcOpenShell - IFC toolkit and geometry engine
# Copyright (C) 2023 Dion Moult <dion@thinkmoult.com>
#
# This file is part of IfcOpenShell.
#
# IfcOpenShell is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# IfcOpenShell is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
import ifcopenshell


def remove_styled_representation(file: ifcopenshell.file, representation: ifcopenshell.entity_instance) -> None:
    """Removes a styled representation

    Styled representations are typically associated with materials. This
    removes the representation but not the underlying styles.

    :param representation: The IfcStyledRepresentation to remove.
    :return: None

    Example:

    .. code:: python

        # Remove a styled representation
        ifcopenshell.api.style.remove_styled_representation(model, representation=representation)
    """
    for inverse in file.get_inverse(representation):
        if inverse.is_a("IfcMaterialDefinitionRepresentation") and len(inverse.Representations) == 1:
            file.remove(inverse)

    for item in representation.Items:
        if item.is_a("IfcStyledItem") and file.get_total_inverses(item) == 1:
            for style in item.Styles:
                if style.is_a("IfcPresentationStyleAssignment"):
                    file.remove(style)
            file.remove(item)

    file.remove(representation)