# Bonsai - OpenBIM Blender Add-on
# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
#
# This file is part of Bonsai.
#
# Bonsai is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Bonsai 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Bonsai.  If not, see <http://www.gnu.org/licenses/>.

import bpy
import ifcopenshell
import ifcopenshell.api.project
import ifcopenshell.api.root
import ifcopenshell.api.unit

import bonsai.core.tool
import bonsai.tool as tool
from bonsai.tool.polyline import Polyline as subject
from test.bim.bootstrap import NewFile


class TestImplementsTool(NewFile):
    def test_run(self):
        assert isinstance(subject(), bonsai.core.tool.Polyline)


class TestValidateInput(NewFile):
    def test_simple_units(self):
        ifc = ifcopenshell.api.project.create_file()
        tool.Ifc.set(ifc)
        ifcopenshell.api.root.create_entity(ifc, ifc_class="IfcProject")
        unit = ifcopenshell.api.unit.add_si_unit(ifc, unit_type="LENGTHUNIT", prefix=None)
        ifcopenshell.api.unit.assign_unit(ifc, [unit])
        unit_settings = bpy.context.scene.unit_settings
        unit_settings.system = "METRIC"
        assert subject.validate_input("25", "D") == (True, "25.0")
        unit.Prefix = "MILLI"
        unit_settings.length_unit = "MILLIMETERS"
        assert subject.validate_input("25", "D") == (True, "0.025")

        unit_settings.system = "IMPERIAL"
        unit = ifcopenshell.api.unit.add_conversion_based_unit(ifc, name="foot")
        ifcopenshell.api.unit.assign_unit(ifc, [unit])
        assert subject.validate_input("25", "D") == (True, "7.62")
        assert subject.validate_input("25'", "D") == (True, "7.62")
        assert subject.validate_input('25"', "D") == (True, "0.635")

        # Angle.
        assert subject.validate_input("25", "A") == (True, "25.0")


class TestCalculateDistanceAndAngle(NewFile):
    def test_it_does_not_crash_when_distance_is_zero_and_should_round(self, monkeypatch):
        # Regression test for #8597: right after placing the first polyline
        # point, the initial mouse sample can equal the last placed point
        # (distance == 0), e.g. entering the viewport on a YZ plane wall.
        # angle_round_threshold used to only be assigned in the
        # `distance > 0` branch, crashing when should_round reads it here.
        # get_increment_snap_value requires a real 3D viewport rv3d, which
        # is unrelated to this bug, so it's stubbed out for a headless run.
        monkeypatch.setattr(tool.Snap, "get_increment_snap_value", classmethod(lambda cls, context: 1.0))

        polyline_props = tool.Model.get_polyline_props()
        mouse_point = polyline_props.snap_mouse_point.add()
        mouse_point.x, mouse_point.y, mouse_point.z = 0, 0, 0

        tool_state = subject.create_tool_state()
        tool_state.is_input_on = False
        tool_state.use_default_container = False
        tool_state.plane_method = "YZ"

        input_ui = subject.create_input_ui(input_options=["D", "A", "X", "Y", "Z"])

        subject.calculate_distance_and_angle(bpy.context, input_ui, tool_state, should_round=True)

        assert input_ui.get_number_value("D") == 0
        assert input_ui.get_number_value("A") == 0