import ifcopenshell
import ifcopenshell.api


class Usecase:
    def __init__(self, file, **settings):
        self.file = file
        self.settings = {
            "ifc_class": "IfcBuildingElementProxy",
            "predefined_type": None,
            "name": None,
        }
        for key, value in settings.items():
            self.settings[key] = value

    def execute(self):
        element = self.file.create_entity(self.settings["ifc_class"], **{
            "GlobalId": ifcopenshell.guid.new(),
            "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file)
        })
        element.Name = self.settings["name"] or None
        if self.settings["predefined_type"]:
            if hasattr(element, "PredefinedType"):
                try:
                    element.PredefinedType = self.settings["predefined_type"]
                except:
                    element.PredefinedType = "USERDEFINED"
                    if hasattr(element, "ObjectType"):
                        element.ObjectType = self.settings["predefined_type"]
                    elif hasattr(element, "ElementType"):
                        element.ElementType = self.settings["predefined_type"]
            elif hasattr(element, "ObjectType"):
                element.ObjectType = self.settings["predefined_type"]
        if self.file.schema == "IFC2X3":
            self.handle_2x3_defaults(element)
        return element

    def handle_2x3_defaults(self, element):
        if element.is_a("IfcSpatialStructureElement"):
            element.CompositionType = "ELEMENT"
        elif element.is_a("IfcRoof"):
            element.ShapeType = "NOTDEFINED"
