# IfcOpenShell - IFC toolkit and geometry engine
# Copyright (C) 2022 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.util.unit


class Usecase:
    def __init__(self, file, **settings):
        self.file = file
        self.settings = {
            "context": None,  # IfcGeometricRepresentationContext
            "axis": [],  # A list of ordered coordinates for the axis
        }
        for key, value in settings.items():
            self.settings[key] = value

    def execute(self):
        self.settings["unit_scale"] = ifcopenshell.util.unit.calculate_unit_scale(self.file)
        points = [self.convert_si_to_unit(p) for p in self.settings["axis"]]
        if self.file.schema == "IFC2X3":
            curve = self.file.createIfcPolyline([self.file.createIfcCartesianPoint(p) for p in points])
        else:
            curve = self.file.createIfcIndexedPolyCurve(self.file.createIfcCartesianPointList3D(points))
        return self.file.createIfcShapeRepresentation(
            self.settings["context"],
            self.settings["context"].ContextIdentifier,
            "Curve2D" if len(self.settings["axis"][0]) == 2 else "Curve3D",
            [curve],
        )

    def convert_si_to_unit(self, co):
        if isinstance(co, (tuple, list)):
            return [self.convert_si_to_unit(o) for o in co]
        return co / self.settings["unit_scale"]