"""Tests for the app registry, glyph library and family style invariants."""

from __future__ import annotations

import pytest

from python_pkg.app_icons import apps, glyphs, style


class TestGlyphLookup:
    def test_known_glyph(self) -> None:
        assert glyphs.get_glyph("barbell").name == "barbell"

    def test_unknown_glyph_lists_alternatives(self) -> None:
        with pytest.raises(KeyError, match="barbell"):
            glyphs.get_glyph("nope")


class TestAppLookup:
    def test_known_app(self) -> None:
        assert apps.get_app("todo").glyph == "checklist"

    def test_unknown_app_lists_alternatives(self) -> None:
        with pytest.raises(KeyError, match="todo"):
            apps.get_app("nope")

    def test_asset_dir_is_under_repo(self) -> None:
        app = apps.get_app("todo")
        assert app.asset_dir == app.repo / "assets" / "icon"


class TestFamilyInvariants:
    def test_every_app_references_a_real_glyph(self) -> None:
        for app in apps.APPS.values():
            assert app.glyph in glyphs.GLYPHS

    def test_accents_are_shared(self) -> None:
        """Every app uses the one family accent; apps differ by glyph only."""
        accents = {app.accent for app in apps.APPS.values()}
        assert accents == {"#B8862E"}

    def test_accents_are_hex_triplets(self) -> None:
        for app in apps.APPS.values():
            assert app.accent.startswith("#")
            assert len(app.accent) == 7
            int(app.accent[1:], 16)

    def test_no_glyph_is_reused(self) -> None:
        """Apps are told apart by glyph; a new app must not borrow one."""
        shared_by_design = {"track-bars"}  # kuhylog + betting_sim, pre-existing
        used = [app.glyph for app in apps.APPS.values()]
        reused = {glyph for glyph in used if used.count(glyph) > 1}
        assert reused <= shared_by_design

    def test_safe_box_fits_inside_canvas(self) -> None:
        assert style.SAFE_BOX < style.CANVAS
        assert style.MIN_NEGATIVE_SPACE == style.STROKE_WIDTH / 2

    def test_no_glyph_paints_the_background_colour(self) -> None:
        """A hole must be cut, not painted.

        ``icon_foreground`` and ``icon_monochrome`` are rendered on
        transparency, so a shape filled with ``style.BACKGROUND`` to fake a
        hole shows up as a charcoal blob on those layers instead of
        disappearing — and on the monochrome layer, which the system
        recolours, in the wrong colour entirely. Holes belong in the path as
        ``fill-rule="evenodd"`` subpaths.
        """
        for glyph in glyphs.GLYPHS.values():
            assert style.BACKGROUND.lower() not in glyph.body.lower(), (
                f"{glyph.name} paints style.BACKGROUND; cut the hole with "
                f'fill-rule="evenodd" instead'
            )


class TestHourglassGlyph:
    def test_daily_limits_uses_it(self) -> None:
        assert apps.get_app("daily_limits").glyph == "hourglass"

    def test_sand_is_filled_in_the_accent(self) -> None:
        """The sand takes the accent marker, so the monochrome layer recolours it."""
        body = glyphs.get_glyph("hourglass").body
        assert f'fill="{style.ACCENT_MARKER}"' in body
        assert 'stroke="none"' in body