# 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


class Usecase:
    def __init__(self, file, work_calendar=None):
        """Removes a work calendar

        All relationships are also removed, such as if a task is set to use that
        calendar.

        :param work_calendar: The IfcWorkCalendar to remove
        :type work_calendar: ifcopenshell.entity_instance.entity_instance
        :return: None
        :rtype: None

        Example:

        .. code:: python

            # Let's create a new calendar.
            calendar = ifcopenshell.api.run("sequence.add_work_calendar", model, name="5 Day Week")

            # And remove it immediately
            ifcopenshell.api.run("sequence.remove_work_calendar", model, work_calendar=calendar)
        """
        self.file = file
        self.settings = {"work_calendar": work_calendar}

    def execute(self):
        # TODO: do a deep purge
        ifcopenshell.api.run(
            "project.unassign_declaration",
            self.file,
            definition=self.settings["work_calendar"],
            relating_context=self.file.by_type("IfcContext")[0],
        )
        if self.settings["work_calendar"].Controls:
            for rel in self.settings["work_calendar"].Controls:
                for object in rel.RelatedObjects:
                    ifcopenshell.api.run(
                        "control.unassign_control",
                        self.file,
                        **{
                            "relating_control": self.settings["work_calendar"],
                            "related_object": object,
                        }
                    )
        self.file.remove(self.settings["work_calendar"])