# 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


class Usecase:
    def __init__(self, file):
        """Add a new structural analysis model

        A structural analysis model is a group of all the loads, reactions,
        structural members, and structural connections required to describe a
        structural analysis model.

        A 3D analytical model is assumed.

        :return: The newly created IfcStructuralAnalysisModel
        :rtype: ifcopenshell.entity_instance.entity_instance

        Example:

        .. code:: python

            # Create a fresh blank structural analysis
            analysis = ifcopenshell.api.run("structural.add_structural_analysis_model", model)
        """
        self.file = file
        self.settings = {}

    def execute(self):
        return ifcopenshell.api.run(
            "root.create_entity", self.file, ifc_class="IfcStructuralAnalysisModel", predefined_type="LOADING_3D"
        )