# IfcOpenShell - IFC toolkit and geometry engine
# Copyright (C) 2021 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.util.element


def remove_prop_template(file: ifcopenshell.file, prop_template: ifcopenshell.entity_instance) -> None:
    """Removes a property template

    Note that a property set template should always have at least one
    property template to be valid, so take care when removing property
    templates.

    :param prop_template: The IfcSimplePropertyTemplate to remove.
    :type prop_template: ifcopenshell.entity_instance
    :return: None
    :rtype: None

    Example:

    .. code:: python

        template = ifcopenshell.api.pset_template.add_pset_template(model, name="ABC_RiskFactors")

        # Here's two propertes with just default values.
        prop1 = ifcopenshell.api.pset_template.add_prop_template(model, pset_template=template)
        prop2 = ifcopenshell.api.pset_template.add_prop_template(model, pset_template=template)

        # Let's remove the second one.
        ifcopenshell.api.pset_template.remove_prop_template(model, prop_template=prop2)
    """
    settings = {"prop_template": prop_template}

    for inverse in file.get_inverse(settings["prop_template"]):
        if len(inverse.HasPropertyTemplates) == 1:
            inverse.HasPropertyTemplates = []
        else:
            has_property_templates = list(inverse.HasPropertyTemplates)
            has_property_templates.remove(settings["prop_template"])
            inverse.HasPropertyTemplates = has_property_templates
    ifcopenshell.util.element.remove_deep(file, settings["prop_template"])
