from fontTools.pens.recordingPen import RecordingPen
from fontTools.pens.reverseContourPen import ReverseContourPen
import pytest


TEST_DATA = [
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("lineTo", ((2, 2),)),
            ("lineTo", ((3, 3),)),  # last not on move, line is implied
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((3, 3),)),
            ("lineTo", ((2, 2),)),
            ("lineTo", ((1, 1),)),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("lineTo", ((2, 2),)),
            ("lineTo", ((0, 0),)),  # last on move, no implied line
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((2, 2),)),
            ("lineTo", ((1, 1),)),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("lineTo", ((2, 2),)),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((2, 2),)),
            ("lineTo", ((1, 1),)),
            ("lineTo", ((0, 0),)),
            ("lineTo", ((0, 0),)),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("curveTo", ((1, 1), (2, 2), (3, 3))),
            ("curveTo", ((4, 4), (5, 5), (0, 0))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("curveTo", ((5, 5), (4, 4), (3, 3))),
            ("curveTo", ((2, 2), (1, 1), (0, 0))),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("curveTo", ((1, 1), (2, 2), (3, 3))),
            ("curveTo", ((4, 4), (5, 5), (6, 6))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((6, 6),)),  # implied line
            ("curveTo", ((5, 5), (4, 4), (3, 3))),
            ("curveTo", ((2, 2), (1, 1), (0, 0))),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),  # this line becomes implied
            ("curveTo", ((2, 2), (3, 3), (4, 4))),
            ("curveTo", ((5, 5), (6, 6), (7, 7))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((7, 7),)),
            ("curveTo", ((6, 6), (5, 5), (4, 4))),
            ("curveTo", ((3, 3), (2, 2), (1, 1))),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("qCurveTo", ((1, 1), (2, 2))),
            ("qCurveTo", ((3, 3), (0, 0))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("qCurveTo", ((3, 3), (2, 2))),
            ("qCurveTo", ((1, 1), (0, 0))),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("qCurveTo", ((1, 1), (2, 2))),
            ("qCurveTo", ((3, 3), (4, 4))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((4, 4),)),
            ("qCurveTo", ((3, 3), (2, 2))),
            ("qCurveTo", ((1, 1), (0, 0))),
            ("closePath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("qCurveTo", ((2, 2), (3, 3))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((3, 3),)),
            ("qCurveTo", ((2, 2), (1, 1))),
            ("closePath", ()),
        ],
    ),
    (
        [("addComponent", ("a", (1, 0, 0, 1, 0, 0)))],
        [("addComponent", ("a", (1, 0, 0, 1, 0, 0)))],
    ),
    ([], []),
    (
        [
            ("moveTo", ((0, 0),)),
            ("endPath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("endPath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 0),)),
            ("endPath", ()),  # single-point paths is always open
        ],
    ),
    (
        [("moveTo", ((0, 0),)), ("lineTo", ((1, 1),)), ("endPath", ())],
        [("moveTo", ((1, 1),)), ("lineTo", ((0, 0),)), ("endPath", ())],
    ),
    (
        [("moveTo", ((0, 0),)), ("curveTo", ((1, 1), (2, 2), (3, 3))), ("endPath", ())],
        [("moveTo", ((3, 3),)), ("curveTo", ((2, 2), (1, 1), (0, 0))), ("endPath", ())],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("curveTo", ((1, 1), (2, 2), (3, 3))),
            ("lineTo", ((4, 4),)),
            ("endPath", ()),
        ],
        [
            ("moveTo", ((4, 4),)),
            ("lineTo", ((3, 3),)),
            ("curveTo", ((2, 2), (1, 1), (0, 0))),
            ("endPath", ()),
        ],
    ),
    (
        [
            ("moveTo", ((0, 0),)),
            ("lineTo", ((1, 1),)),
            ("curveTo", ((2, 2), (3, 3), (4, 4))),
            ("endPath", ()),
        ],
        [
            ("moveTo", ((4, 4),)),
            ("curveTo", ((3, 3), (2, 2), (1, 1))),
            ("lineTo", ((0, 0),)),
            ("endPath", ()),
        ],
    ),
    (
        [("qCurveTo", ((0, 0), (1, 1), (2, 2), None)), ("closePath", ())],
        [("qCurveTo", ((0, 0), (2, 2), (1, 1), None)), ("closePath", ())],
    ),
    (
        [("qCurveTo", ((0, 0), (1, 1), (2, 2), None)), ("endPath", ())],
        [
            ("qCurveTo", ((0, 0), (2, 2), (1, 1), None)),
            ("closePath", ()),  # this is always "closed"
        ],
    ),
    # Test case from:
    # https://github.com/googlei18n/cu2qu/issues/51#issue-179370514
    (
        [
            ("moveTo", ((848, 348),)),
            ("lineTo", ((848, 348),)),  # duplicate lineTo point after moveTo
            ("qCurveTo", ((848, 526), (649, 704), (449, 704))),
            ("qCurveTo", ((449, 704), (248, 704), (50, 526), (50, 348))),
            ("lineTo", ((50, 348),)),
            ("qCurveTo", ((50, 348), (50, 171), (248, -3), (449, -3))),
            ("qCurveTo", ((449, -3), (649, -3), (848, 171), (848, 348))),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((848, 348),)),
            ("qCurveTo", ((848, 171), (649, -3), (449, -3), (449, -3))),
            ("qCurveTo", ((248, -3), (50, 171), (50, 348), (50, 348))),
            ("lineTo", ((50, 348),)),
            ("qCurveTo", ((50, 526), (248, 704), (449, 704), (449, 704))),
            ("qCurveTo", ((649, 704), (848, 526), (848, 348))),
            ("lineTo", ((848, 348),)),  # the duplicate point is kept
            ("closePath", ()),
        ],
    ),
    # Test case from https://github.com/googlefonts/fontmake/issues/572
    # An additional closing lineTo is required to disambiguate a duplicate
    # point at the end of a contour from the implied closing line.
    (
        [
            ("moveTo", ((0, 651),)),
            ("lineTo", ((0, 101),)),
            ("lineTo", ((0, 101),)),
            ("lineTo", ((0, 651),)),
            ("lineTo", ((0, 651),)),
            ("closePath", ()),
        ],
        [
            ("moveTo", ((0, 651),)),
            ("lineTo", ((0, 651),)),
            ("lineTo", ((0, 101),)),
            ("lineTo", ((0, 101),)),
            ("closePath", ()),
        ],
    ),
]


@pytest.mark.parametrize("contour, expected", TEST_DATA)
def test_reverse_pen(contour, expected):
    recpen = RecordingPen()
    revpen = ReverseContourPen(recpen)
    for operator, operands in contour:
        getattr(revpen, operator)(*operands)
    assert recpen.value == expected


def test_reverse_pen_outputImpliedClosingLine():
    recpen = RecordingPen()
    revpen = ReverseContourPen(recpen)
    revpen.moveTo((0, 0))
    revpen.lineTo((10, 0))
    revpen.lineTo((0, 10))
    revpen.lineTo((0, 0))
    revpen.closePath()
    assert len(recpen.value) == 4

    recpen = RecordingPen()
    revpen = ReverseContourPen(recpen, outputImpliedClosingLine=True)
    revpen.moveTo((0, 0))
    revpen.lineTo((10, 0))
    revpen.lineTo((0, 10))
    revpen.lineTo((0, 0))
    revpen.closePath()
    assert len(recpen.value) == 6


@pytest.mark.parametrize("contour, expected", TEST_DATA)
def test_reverse_point_pen(contour, expected):
    from fontTools.ufoLib.pointPen import (
        ReverseContourPointPen,
        PointToSegmentPen,
        SegmentToPointPen,
    )

    recpen = RecordingPen()
    pt2seg = PointToSegmentPen(recpen, outputImpliedClosingLine=True)
    revpen = ReverseContourPointPen(pt2seg)
    seg2pt = SegmentToPointPen(revpen)
    for operator, operands in contour:
        getattr(seg2pt, operator)(*operands)

    # for closed contours that have a lineTo following the moveTo,
    # and whose points don't overlap, our current implementation diverges
    # from the ReverseContourPointPen as wrapped by ufoLib's pen converters.
    # In the latter case, an extra lineTo is added because of
    # outputImpliedClosingLine=True. This is redundant but not incorrect,
    # as the number of points is the same in both.
    if (
        contour
        and contour[-1][0] == "closePath"
        and contour[1][0] == "lineTo"
        and contour[1][1] != contour[0][1]
    ):
        expected = expected[:-1] + [("lineTo", contour[0][1])] + expected[-1:]

    assert recpen.value == expected