# Copyright (c) 2010-2022, Manfred Moitzi
# License: MIT License
import pytest
from math import radians
from ezdxf.math import xround, Vec2
from ezdxf.math.construct2d import *


def test_left_of_line():
    assert is_point_left_of_line(Vec2(-1, 0), Vec2(0, 0), Vec2(0.1, 1)) is True
    assert is_point_left_of_line(Vec2(1, 0), Vec2(0, 0), Vec2(0, -1)) is True
    assert is_point_left_of_line(Vec2(-1, -1), Vec2(0, 0), Vec2(0.1, 1)) is True


def test_point_to_line_relation_left():
    assert point_to_line_relation(Vec2(-1, 0), Vec2(0, 0), Vec2(0.1, 1)) == -1
    assert point_to_line_relation(Vec2(1, 0), Vec2(0, 0), Vec2(0, -1)) == -1
    assert point_to_line_relation(Vec2(-1, -1), Vec2(0, 0), Vec2(0.1, 1)) == -1


def test_left_of_line_or_on_the_line():
    # vertical line
    assert (
        is_point_left_of_line(Vec2(1, 0), Vec2(0, 0), Vec2(0, 1), colinear=True)
        is False
    )
    assert (
        is_point_left_of_line(
            Vec2(0, 0.5), Vec2(0, 0), Vec2(0, 1), colinear=True
        )
        is True
    )
    assert (
        is_point_left_of_line(
            Vec2(-1, 0.5), Vec2(0, 0), Vec2(0, 1), colinear=True
        )
        is True
    )
    # horizontal line
    assert (
        is_point_left_of_line(Vec2(0, 1), Vec2(0, 0), Vec2(1, 0), colinear=True)
        is True
    )
    assert (
        is_point_left_of_line(Vec2(0, 0), Vec2(0, 0), Vec2(1, 0), colinear=True)
        is True
    )
    assert (
        is_point_left_of_line(
            Vec2(0, -1), Vec2(0, 0), Vec2(1, 0), colinear=True
        )
        is False
    )
    # 45 deg line
    assert (
        is_point_left_of_line(Vec2(0, 0), Vec2(0, 0), Vec2(1, 1), colinear=True)
        is True
    )
    assert (
        is_point_left_of_line(
            Vec2(0.5, 0.5), Vec2(0, 0), Vec2(1, 1), colinear=True
        )
        is True
    )
    assert (
        is_point_left_of_line(Vec2(1, 1), Vec2(0, 0), Vec2(1, 1), colinear=True)
        is True
    )
    assert (
        is_point_left_of_line(
            Vec2(0.5, 0.49), Vec2(0, 0), Vec2(1, 1), colinear=True
        )
        is False
    )


def test_point_ot_line_relation_on_line():
    # vertical line
    assert point_to_line_relation(Vec2(0, 2), Vec2(0, 0), Vec2(0, 1)) == 0
    assert point_to_line_relation(Vec2(0, -1), Vec2(0, 0), Vec2(0, 1)) == 0
    assert point_to_line_relation(Vec2(0, 0.5), Vec2(0, 0), Vec2(0, 1)) == 0
    # horizontal line
    assert point_to_line_relation(Vec2(1, 0), Vec2(0, 0), Vec2(1, 0)) == 0
    assert point_to_line_relation(Vec2(-1, 0), Vec2(0, 0), Vec2(1, 0)) == 0
    assert point_to_line_relation(Vec2(0, 0), Vec2(0, 0), Vec2(1, 0)) == 0
    # 45 deg line
    assert point_to_line_relation(Vec2(0, 0), Vec2(0, 0), Vec2(1, 1)) == 0
    assert point_to_line_relation(Vec2(0.5, 0.5), Vec2(0, 0), Vec2(1, 1)) == 0
    assert point_to_line_relation(Vec2(1, 1), Vec2(0, 0), Vec2(1, 1)) == 0
    assert point_to_line_relation(Vec2(-0.5, -0.5), Vec2(0, 0), Vec2(1, 1)) == 0


def test_xround():
    assert xround(9.999, 0.0) == 10
    assert xround(9.999, 0.5) == 10
    assert xround(9.75, 0.5) == 10
    assert xround(9.74, 0.5) == 9.5
    assert xround(9.74, 0.25) == 9.75
    assert xround(9.626, 0.25) == 9.75
    assert xround(9.624, 0.25) == 9.50
    assert xround(9.624, 0.1) == 9.6
    assert xround(9.624, 0.01) == 9.62
    assert xround(9.626, 0.01) == 9.63
    assert xround(9.626, 0.05) == 9.65

    assert xround(19.1, 1.0) == 19
    assert xround(19.1, 2.0) == 20
    assert xround(18.9, 2.0) == 18
    assert xround(18.9, 5.0) == 20
    assert xround(18.9, 10) == 20
    assert xround(1234, 10) == 1230
    assert xround(1236, 10) == 1240


def test_enclosing_angles():
    assert (
        enclosing_angles(
            radians(45),
            start_angle=radians(45),
            end_angle=radians(45),
            ccw=True,
        )
        is True
    )
    assert (
        enclosing_angles(
            radians(45),
            start_angle=radians(45),
            end_angle=radians(45),
            ccw=False,
        )
        is True
    )

    assert (
        enclosing_angles(
            radians(90),
            start_angle=radians(45),
            end_angle=radians(135),
            ccw=True,
        )
        is True
    )
    assert (
        enclosing_angles(
            radians(90),
            start_angle=radians(45),
            end_angle=radians(135),
            ccw=False,
        )
        is False
    )

    assert (
        enclosing_angles(
            radians(0),
            start_angle=radians(45),
            end_angle=radians(135),
            ccw=True,
        )
        is False
    )
    assert (
        enclosing_angles(
            radians(0),
            start_angle=radians(45),
            end_angle=radians(135),
            ccw=False,
        )
        is True
    )

    assert (
        enclosing_angles(
            radians(45),
            start_angle=radians(50),
            end_angle=radians(40),
            ccw=True,
        )
        is False
    )
    assert (
        enclosing_angles(
            radians(45),
            start_angle=radians(50),
            end_angle=radians(40),
            ccw=False,
        )
        is True
    )

    assert (
        enclosing_angles(
            radians(90),
            start_angle=radians(135),
            end_angle=radians(45),
            ccw=True,
        )
        is False
    )
    assert (
        enclosing_angles(
            radians(90),
            start_angle=radians(135),
            end_angle=radians(45),
            ccw=False,
        )
        is True
    )

    assert (
        enclosing_angles(
            radians(270),
            start_angle=radians(135),
            end_angle=radians(45),
            ccw=True,
        )
        is True
    )
    assert (
        enclosing_angles(
            radians(270),
            start_angle=radians(135),
            end_angle=radians(45),
            ccw=False,
        )
        is False
    )


def test_no_points():
    assert closest_point((0, 0), []) is None


def test_one_points():
    assert closest_point((0, 0), [(1, 1)]) == (1, 1)


def test_two_points():
    assert closest_point((0, 0), [(0, 0, 1), (1, 1, 1)]) == (0, 0, 1)


def test_more_points():
    assert closest_point(
        (0, 0), [(0, 0, 1), (1, 1, 1), (2, 2, 2), (0, 0, -0.5)]
    ) == (0, 0, -0.5)


def test_decdeg2dms():
    ss = 1.0 / 3600.0
    mm = 1.0 / 60.0
    for value in linspace(-2, 2, 71):
        d, m, s = decdeg2dms(value)
        result = d + m * mm + s * ss
        assert value == pytest.approx(result)
    assert decdeg2dms(-1) == (-1, 0, 0)
    assert decdeg2dms(0) == (0, 0, 0)
    assert decdeg2dms(1) == (1, 0, 0)


def test_linspace():
    assert list(linspace(1, 4, num=4)) == [1, 2, 3, 4]
    assert list(linspace(1, 4, num=1)) == [1]
    assert list(linspace(1, 4, num=0)) == []
    assert list(linspace(1, 5, num=4, endpoint=False)) == [1, 2, 3, 4]
    assert list(linspace(2, -2, num=5)) == [2, 1, 0, -1, -2]
    with pytest.raises(ValueError):
        list(linspace(1, 4, num=-1))


def test_area():
    assert area([(4, 6), (4, -4), (8, -4), (8, -8), (-4, -8), (-4, 6)]) == 128
