from __future__ import annotations

import pytest

from PIL import Image, ImageDraw, ImageFont, ImageText

from .helper import assert_image_similar_tofile, skip_unless_feature

FONT_PATH = "Tests/fonts/FreeMono.ttf"


@pytest.fixture(
    scope="module",
    params=[
        pytest.param(ImageFont.Layout.BASIC),
        pytest.param(ImageFont.Layout.RAQM, marks=skip_unless_feature("raqm")),
    ],
)
def layout_engine(request: pytest.FixtureRequest) -> ImageFont.Layout:
    return request.param


@pytest.fixture(scope="module")
def font(layout_engine: ImageFont.Layout) -> ImageFont.FreeTypeFont:
    return ImageFont.truetype(FONT_PATH, 20, layout_engine=layout_engine)


def test_get_length(font: ImageFont.FreeTypeFont) -> None:
    assert ImageText.Text("A", font).get_length() == 12
    assert ImageText.Text("AB", font).get_length() == 24
    assert ImageText.Text("M", font).get_length() == 12
    assert ImageText.Text("y", font).get_length() == 12
    assert ImageText.Text("a", font).get_length() == 12


def test_get_bbox(font: ImageFont.FreeTypeFont) -> None:
    assert ImageText.Text("A", font).get_bbox() == (0, 4, 12, 16)
    assert ImageText.Text("AB", font).get_bbox() == (0, 4, 24, 16)
    assert ImageText.Text("M", font).get_bbox() == (0, 4, 12, 16)
    assert ImageText.Text("y", font).get_bbox() == (0, 7, 12, 20)
    assert ImageText.Text("a", font).get_bbox() == (0, 7, 12, 16)


def test_standard_embedded_color(layout_engine: ImageFont.Layout) -> None:
    font = ImageFont.truetype(FONT_PATH, 40, layout_engine=layout_engine)
    text = ImageText.Text("Hello World!", font)
    text.embed_color()

    im = Image.new("RGB", (300, 64), "white")
    draw = ImageDraw.Draw(im)
    draw.text((10, 10), text, "#fa6")

    assert_image_similar_tofile(im, "Tests/images/standard_embedded.png", 3.1)


@skip_unless_feature("freetype2")
def test_stroke() -> None:
    for suffix, stroke_fill in {"same": None, "different": "#0f0"}.items():
        # Arrange
        im = Image.new("RGB", (120, 130))
        draw = ImageDraw.Draw(im)
        font = ImageFont.truetype(FONT_PATH, 120)
        text = ImageText.Text("A", font)
        text.stroke(2, stroke_fill)

        # Act
        draw.text((12, 12), text, "#f00")

        # Assert
        assert_image_similar_tofile(
            im, "Tests/images/imagedraw_stroke_" + suffix + ".png", 3.1
        )