from fontTools import ttLib
from pathlib import Path
import pytest
import re


NAME_ID_FAMILY = 1
NAME_ID_UNIQUE_ID = 3
NAME_ID_FULLNAME = 4
NAME_ID_POSTSCRIPT_NAME = 6


def test_consistent_version():
    fonts_dir = Path("fonts")
    assert fonts_dir.is_dir()

    name5_re = re.compile(r"^Version (\d+.\d+);GOOG;noto-emoji:\d+:[a-z0-9]+$")

    debug_versions = []
    versions = set()
    for font_file in fonts_dir.rglob("*.ttf"):
        font = ttLib.TTFont(font_file)
        head_ver = f"{font['head'].fontRevision:.03f}"
        versions.add(head_ver)
        debug_versions.append(f"{font_file.name} head {head_ver}")
        for name in font["name"].names:
            # name 5 is version
            if name.nameID != 5:
                continue
            if not name.isUnicode():
                continue
            match = name5_re.match(name.toUnicode())
            assert match is not None, f"{name.toUnicode()} is malformed"
            versions.add(match.group(1))
            debug_versions.append(f"{font_file.name} name {match.group(1)}")
    debug_versions = "\n".join(debug_versions)
    assert (
        len(versions) == 1
    ), f"Should have a consistent version, found\n{debug_versions}"


def test_consistent_fstype():
    fonts_dir = Path("fonts")
    assert fonts_dir.is_dir()

    name5_re = re.compile(r"^Version (\d+.\d+);GOOG;noto-emoji:\d+:[a-z0-9]+$")

    debug_fstypes = []
    fstypes = set()
    for font_file in fonts_dir.rglob("*.ttf"):
        font = ttLib.TTFont(font_file)
        fstype = font["OS/2"].fsType
        fstypes.add(fstype)
        debug_fstypes.append(f"{font_file.name} fsType {fstype}")
    debug_fstypes = "\n".join(debug_fstypes)
    assert fstypes == {0}, f"All fsType's should be 0, found\n{debug_fstypes}"


def test_has_emojicompat():
    fonts_dir = Path("fonts")
    assert fonts_dir.is_dir()

    ec_fonts = set(fonts_dir.rglob("*-emojicompat.ttf"))
    assert {f.name for f in ec_fonts} == {
        "Noto-COLRv1-emojicompat.ttf",
        "NotoColorEmoji-emojicompat.ttf",
    }

    for font_file in ec_fonts:
        font = ttLib.TTFont(font_file)
        assert "meta" in font, f"{font_file.name} should have a meta table"
        assert (
            "Emji" in font["meta"].data
        ), f"{font_file.name} should have emojicompat data"


def name(font, name_id):
    values = set()
    for name in font["name"].names:
        if name.nameID == name_id:
            values.add(name.toUnicode())
    assert len(values) == 1, f"{name_id} has multiple definitions: {values}"
    return next(iter(values))


def test_flagsonly_name():
    fonts_dir = Path("fonts")
    assert fonts_dir.is_dir()
    font_file = fonts_dir / "NotoColorEmoji-flagsonly.ttf"
    font = ttLib.TTFont(font_file)
    assert [
        "Noto Color Emoji Flags",
        "Noto Color Emoji Flags",
        "Noto Color Emoji Flags",
        "NotoColorEmojiFlags",
    ] == [
        name(font, NAME_ID_FAMILY),
        name(font, NAME_ID_FULLNAME),
        name(font, NAME_ID_UNIQUE_ID),
        name(font, NAME_ID_POSTSCRIPT_NAME),
    ]