from fontTools.pens.recordingPen import RecordingPen
from fontTools.svgLib import parse_path

import pytest


@pytest.mark.parametrize(
    "pathdef, expected",
    [

        # Examples from the SVG spec

        (
            "M 100 100 L 300 100 L 200 300 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # for Z command behavior when there is multiple subpaths
        (
            "M 0 0 L 50 20 M 100 100 L 300 100 L 200 300 z",
            [
                ("moveTo", ((0.0, 0.0),)),
                ("lineTo", ((50.0, 20.0),)),
                ("endPath", ()),
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        (
            "M100,200 C100,100 250,100 250,200 S400,300 400,200",
            [
                ("moveTo", ((100.0, 200.0),)),
                ("curveTo", ((100.0, 100.0),
                             (250.0, 100.0),
                             (250.0, 200.0))),
                ("curveTo", ((250.0, 300.0),
                             (400.0, 300.0),
                             (400.0, 200.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M100,200 C100,100 400,100 400,200",
            [
                ("moveTo", ((100.0, 200.0),)),
                ("curveTo", ((100.0, 100.0),
                             (400.0, 100.0),
                             (400.0, 200.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M100,500 C25,400 475,400 400,500",
            [
                ("moveTo", ((100.0, 500.0),)),
                ("curveTo", ((25.0, 400.0),
                             (475.0, 400.0),
                             (400.0, 500.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M100,800 C175,700 325,700 400,800",
            [
                ("moveTo", ((100.0, 800.0),)),
                ("curveTo", ((175.0, 700.0),
                             (325.0, 700.0),
                             (400.0, 800.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M600,200 C675,100 975,100 900,200",
            [
                ("moveTo", ((600.0, 200.0),)),
                ("curveTo", ((675.0, 100.0),
                             (975.0, 100.0),
                             (900.0, 200.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M600,500 C600,350 900,650 900,500",
            [
                ("moveTo", ((600.0, 500.0),)),
                ("curveTo", ((600.0, 350.0),
                             (900.0, 650.0),
                             (900.0, 500.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M600,800 C625,700 725,700 750,800 S875,900 900,800",
            [
                ("moveTo", ((600.0, 800.0),)),
                ("curveTo", ((625.0, 700.0),
                             (725.0, 700.0),
                             (750.0, 800.0))),
                ("curveTo", ((775.0, 900.0),
                             (875.0, 900.0),
                             (900.0, 800.0))),
                ("endPath", ()),
            ]
        ),
        (
            "M200,300 Q400,50 600,300 T1000,300",
            [
                ("moveTo", ((200.0, 300.0),)),
                ("qCurveTo", ((400.0, 50.0),
                              (600.0, 300.0))),
                ("qCurveTo", ((800.0, 550.0),
                              (1000.0, 300.0))),
                ("endPath", ()),
            ]
        ),
        # End examples from SVG spec

        # Relative moveto
        (
            "M 0 0 L 50 20 m 50 80 L 300 100 L 200 300 z",
            [
                ("moveTo", ((0.0, 0.0),)),
                ("lineTo", ((50.0, 20.0),)),
                ("endPath", ()),
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # Initial smooth and relative curveTo
        (
            "M100,200 s 150,-100 150,0",
            [
                ("moveTo", ((100.0, 200.0),)),
                ("curveTo", ((100.0, 200.0),
                             (250.0, 100.0),
                             (250.0, 200.0))),
                ("endPath", ()),
            ]
        ),
        # Initial smooth and relative qCurveTo
        (
            "M100,200 t 150,0",
            [
                ("moveTo", ((100.0, 200.0),)),
                ("qCurveTo", ((100.0, 200.0),
                              (250.0, 200.0))),
                ("endPath", ()),
            ]
        ),
        # relative l command
        (
            "M 100 100 L 300 100 l -100 200 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # relative q command
        (
            "M200,300 q200,-250 400,0",
            [
                ("moveTo", ((200.0, 300.0),)),
                ("qCurveTo", ((400.0, 50.0),
                              (600.0, 300.0))),
                ("endPath", ()),
            ]
        ),
        # absolute H command
        (
            "M 100 100 H 300 L 200 300 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # relative h command
        (
            "M 100 100 h 200 L 200 300 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((300.0, 100.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # absolute V command
        (
            "M 100 100 V 300 L 200 300 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((100.0, 300.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
        # relative v command
        (
            "M 100 100 v 200 L 200 300 z",
            [
                ("moveTo", ((100.0, 100.0),)),
                ("lineTo", ((100.0, 300.0),)),
                ("lineTo", ((200.0, 300.0),)),
                ("lineTo", ((100.0, 100.0),)),
                ("closePath", ()),
            ]
        ),
    ]
)
def test_parse_path(pathdef, expected):
    pen = RecordingPen()
    parse_path(pathdef, pen)

    assert pen.value == expected


@pytest.mark.parametrize(
    "pathdef1, pathdef2",
    [
        # don't need spaces between numbers and commands
        (
            "M 100 100 L 200 200",
            "M100 100L200 200",
        ),
        # repeated implicit command
        (
            "M 100 200 L 200 100 L -100 -200",
            "M 100 200 L 200 100 -100 -200"
        ),
        # don't need spaces before a minus-sign
        (
            "M100,200c10-5,20-10,30-20",
            "M 100 200 c 10 -5 20 -10 30 -20"
        ),
        # closed paths have an implicit lineTo if they don't
        # end on the same point as the initial moveTo
        (
            "M 100 100 L 300 100 L 200 300 z",
            "M 100 100 L 300 100 L 200 300 L 100 100 z"
        )
    ]
)
def test_equivalent_paths(pathdef1, pathdef2):
    pen1 = RecordingPen()
    parse_path(pathdef1, pen1)

    pen2 = RecordingPen()
    parse_path(pathdef2, pen2)

    assert pen1.value == pen2.value


def test_exponents():
    # It can be e or E, the plus is optional, and a minimum of +/-3.4e38 must be supported.
    pen = RecordingPen()
    parse_path("M-3.4e38 3.4E+38L-3.4E-38,3.4e-38", pen)
    expected = [
        ("moveTo", ((-3.4e+38, 3.4e+38),)),
        ("lineTo", ((-3.4e-38, 3.4e-38),)),
        ("endPath", ()),
    ]

    assert pen.value == expected


def test_invalid_implicit_command():
    with pytest.raises(ValueError) as exc_info:
        parse_path("M 100 100 L 200 200 Z 100 200", RecordingPen())
    assert exc_info.match("Unallowed implicit command")


def test_arc_to_cubic_bezier():
    pen = RecordingPen()
    parse_path("M300,200 h-150 a150,150 0 1,0 150,-150 z", pen)
    expected = [
        ('moveTo', ((300.0, 200.0),)),
        ('lineTo', ((150.0, 200.0),)),
        (
            'curveTo',
            (
                (150.0, 282.842),
                (217.157, 350.0),
                (300.0, 350.0)
            )
        ),
        (
            'curveTo',
            (
                (382.842, 350.0),
                (450.0, 282.842),
                (450.0, 200.0)
            )
        ),
        (
            'curveTo',
            (
                (450.0, 117.157),
                (382.842, 50.0),
                (300.0, 50.0)
            )
        ),
        ('lineTo', ((300.0, 200.0),)),
        ('closePath', ())
    ]

    result = list(pen.value)
    assert len(result) == len(expected)
    for (cmd1, points1), (cmd2, points2) in zip(result, expected):
        assert cmd1 == cmd2
        assert len(points1) == len(points2)
        for pt1, pt2 in zip(points1, points2):
            assert pt1 == pytest.approx(pt2, rel=1e-5)


class ArcRecordingPen(RecordingPen):

    def arcTo(self, rx, ry, rotation, arc_large, arc_sweep, end_point):
        self.value.append(
            ("arcTo", (rx, ry, rotation, arc_large, arc_sweep, end_point))
        )


def test_arc_pen_with_arcTo():
    pen = ArcRecordingPen()
    parse_path("M300,200 h-150 a150,150 0 1,0 150,-150 z", pen)
    expected = [
        ('moveTo', ((300.0, 200.0),)),
        ('lineTo', ((150.0, 200.0),)),
        ('arcTo', (150.0, 150.0, 0.0, True, False, (300.0, 50.0))),
        ('lineTo', ((300.0, 200.0),)),
        ('closePath', ())
    ]

    assert pen.value == expected


@pytest.mark.parametrize(
    "path, expected",
    [
        (
            "M1-2A3-4-1.0 01.5.7",
            [
                ("moveTo", ((1.0, -2.0),)),
                ("arcTo", (3.0, -4.0, -1.0, False, True, (0.5, 0.7))),
                ("endPath", ()),
            ],
        ),
        (
            "M21.58 7.19a2.51 2.51 0 10-1.77-1.77",
            [
                ("moveTo", ((21.58, 7.19),)),
                ("arcTo", (2.51, 2.51, 0.0, True, False, (19.81, 5.42))),
                ("endPath", ()),
            ],
        ),
        (
            "M22 12a25.87 25.87 0 00-.42-4.81",
            [
                ("moveTo", ((22.0, 12.0),)),
                ("arcTo", (25.87, 25.87, 0.0, False, False, (21.58, 7.19))),
                ("endPath", ()),
            ],
        ),
        (
            "M0,0 A1.2 1.2 0 012 15.8",
            [
                ("moveTo", ((0.0, 0.0),)),
                ("arcTo", (1.2, 1.2, 0.0, False, True, (2.0, 15.8))),
                ("endPath", ()),
            ],
        ),
        (
            "M12 7a5 5 0 105 5 5 5 0 00-5-5",
            [

                ("moveTo", ((12.0, 7.0),)),
                ("arcTo", (5.0, 5.0, 0.0, True, False, (17.0, 12.0))),
                ("arcTo", (5.0, 5.0, 0.0, False, False, (12.0, 7.0))),
                ("endPath", ()),
            ],
        )
    ],
)
def test_arc_flags_without_spaces(path, expected):
    pen = ArcRecordingPen()
    parse_path(path, pen)
    assert pen.value == expected


@pytest.mark.parametrize(
    "path", ["A", "A0,0,0,0,0,0", "A 0 0 0 0 0 0 0 0 0 0 0 0 0"]
)
def test_invalid_arc_not_enough_args(path):
    pen = ArcRecordingPen()
    with pytest.raises(ValueError, match="Invalid arc command") as e:
        parse_path(path, pen)

    assert isinstance(e.value.__cause__, ValueError)
    assert "Not enough arguments" in str(e.value.__cause__)


def test_invalid_arc_argument_value():
    pen = ArcRecordingPen()
    with pytest.raises(ValueError, match="Invalid arc command") as e:
        parse_path("M0,0 A0,0,0,2,0,0,0", pen)

    cause = e.value.__cause__
    assert isinstance(cause, ValueError)
    assert "Invalid argument for 'large-arc-flag' parameter: '2'" in str(cause)

    pen = ArcRecordingPen()
    with pytest.raises(ValueError, match="Invalid arc command") as e:
        parse_path("M0,0 A0,0,0,0,-2.0,0,0", pen)

    cause = e.value.__cause__
    assert isinstance(cause, ValueError)
    assert "Invalid argument for 'sweep-flag' parameter: '-2.0'" in str(cause)