# 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
from typing import Optional


def add_profile(
    file: ifcopenshell.file,
    profile_set: ifcopenshell.entity_instance,
    material: Optional[ifcopenshell.entity_instance] = None,
    profile: Optional[ifcopenshell.entity_instance] = None,
    name: Optional[str] = None,
) -> ifcopenshell.entity_instance:
    """Add a new profile item to a profile set

    A profile item in a profile set represents an extruded 2D profile curve
    that is extruded along the axis of the element. Most commonly there will
    only be a single profile item in a profile set. For example, a beam will
    have a material profile set containing a single profile item, which may
    have a steel material and a I-beam shaped profile curve.

    Note that the "profile item" represents a single extrusion in the
    profile set, whereas the "profile curve" represents a 2D curve used by a
    "profile item".

    Profile is not optional for IfcMaterialProfile but it is optional for this API
    call and can be assigned later with material.assign_profile.

    In some cases, a profiled element (i.e. beam, column) may be a composite
    beam or column and include multiple extrusions. This is rare. The order
    of the profiles does not matter.

    :param profile_set: The IfcMaterialProfileSet that the profile is part of. The
        profile set represents a group of profile items. See
        ifcopenshell.api.material.add_material_set for more information on
        how to add a profile set.
    :param material: The IfcMaterial that the profile item is made out of.
    :param profile: The IfcProfileDef that represents the 2D cross section
        of the the profile item.
    :param name: An optional name of the material profile (not the geometric
        profile).
    :return: The newly created IfcMaterialProfile

    Example:

    .. code:: python

        # Let's imagine we have a steel I-beam. Notice we are assigning to
        # the type only, as all occurrences of that type will automatically
        # inherit the material.
        beam_type = ifcopenshell.api.root.create_entity(model, ifc_class="IfcBeamType", name="B1")

        # First, let's create a material set. This will later be assigned
        # to our beam type element.
        material_set = ifcopenshell.api.material.add_profile_set(model,
            name="B1", set_type="IfcMaterialProfileSet")

        # Create a steel material.
        steel = ifcopenshell.api.material.add_material(model, name="ST01", category="steel")

        # Create an I-beam profile curve. Notice how we name our profiles
        # based on standardised steel profile names.
        hea100 = file.create_entity(
            "IfcIShapeProfileDef", ProfileName="HEA100", ProfileType="AREA",
            OverallWidth=100, OverallDepth=96, WebThickness=5, FlangeThickness=8, FilletRadius=12,
        )

        # Define that steel material and cross section as a single profile
        # item. If this were a composite beam, we might add multiple profile
        # items instead, but this is rarely the case in most construction.
        ifcopenshell.api.material.add_profile(model,
            profile_set=material_set, material=steel, profile=hea100)

        # Great! Let's assign our material set to our beam type.
        ifcopenshell.api.material.assign_material(model, products=[beam_type], material=material_set)
    """
    profiles = list(profile_set.MaterialProfiles or [])
    mat_profile = file.create_entity("IfcMaterialProfile", Name=name)
    if material:
        mat_profile.Material = material
    if profile:
        mat_profile.Profile = profile
    profiles.append(mat_profile)
    profile_set.MaterialProfiles = profiles
    return mat_profile
