# 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
import ifcopenshell.api
import ifcopenshell.api.aggregate
import ifcopenshell.util.element


def remove_work_plan(file: ifcopenshell.file, work_plan: ifcopenshell.entity_instance) -> None:
    """Removes a work plan

    Note that schedules that are grouped under the work plan are not
    removed.

    :param work_plan: The IfcWorkPlan to remove.
    :type work_plan: ifcopenshell.entity_instance
    :return: None
    :rtype: None

    Example:

    .. code:: python

        # This will hold all our construction schedules
        work_plan = ifcopenshell.api.run("sequence.add_work_plan", model, name="Construction")

        # And remove it immediately
        ifcopenshell.api.run("sequence.remove_work_plan", model, work_plan=work_plan)
    """
    settings = {"work_plan": work_plan}

    ifcopenshell.api.run(
        "project.unassign_declaration",
        file,
        definitions=[settings["work_plan"]],
        relating_context=file.by_type("IfcContext")[0],
    )

    related_objects = [obj for rel in work_plan.IsDecomposedBy for obj in rel.RelatedObjects]
    if related_objects:
        ifcopenshell.api.aggregate.unassign_object(file, related_objects)

    history = settings["work_plan"].OwnerHistory
    file.remove(settings["work_plan"])
    if history:
        ifcopenshell.util.element.remove_deep2(file, history)