import numpy
import pytest
import test.bootstrap
import ifcopenshell.api
import ifcopenshell.util.element
import ifcopenshell.util.placement


class TestRemoveContainer(test.bootstrap.IFC4):
    def test_removing_a_container(self):
        element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcBuilding")
        subelement = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
        ifcopenshell.api.run("spatial.assign_container", self.file, product=subelement, relating_structure=element)
        ifcopenshell.api.run("spatial.remove_container", self.file, product=subelement)
        assert ifcopenshell.util.element.get_container(subelement) is None

    def test_doing_nothing_if_no_container(self):
        subelement = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
        ifcopenshell.api.run("spatial.remove_container", self.file, product=subelement)
        assert ifcopenshell.util.element.get_container(subelement) is None

    def test_updating_the_rel_when_a_container_is_removed_with_multipled_elements(self):
        element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcBuilding")
        subelement1 = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
        subelement2 = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
        ifcopenshell.api.run("spatial.assign_container", self.file, product=subelement1, relating_structure=element)
        ifcopenshell.api.run("spatial.assign_container", self.file, product=subelement2, relating_structure=element)
        ifcopenshell.api.run("spatial.remove_container", self.file, product=subelement1)
        assert self.file.by_type("IfcRelContainedInSpatialStructure")[0].RelatedElements == (subelement2,)

    def test_deleting_the_rel_when_a_container_is_removed_with_no_elements(self):
        element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcBuilding")
        subelement = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
        ifcopenshell.api.run("spatial.assign_container", self.file, product=subelement, relating_structure=element)
        ifcopenshell.api.run("spatial.remove_container", self.file, product=subelement)
        assert len(self.file.by_type("IfcRelContainedInSpatialStructure")) == 0