"""Global tests: no orphan formulae, no duplicate formula names."""
import pytest

from tests.conftest import FONT_FILES_DIR, FORMULA_DIR, get_font_dir_names


def test_every_formula_has_matching_font_folder():
    """Every Formula/font-*.rb has a matching font_files/font-<name>/ directory."""
    formula_files = sorted(FORMULA_DIR.glob("font-*.rb"))
    for formula_path in formula_files:
        name = formula_path.stem  # e.g. font-acrylic-hand
        font_dir = FONT_FILES_DIR / name
        assert font_dir.is_dir(), (
            f"Orphan formula: {formula_path.name} has no matching font folder {font_dir}"
        )


def test_no_duplicate_formula_names():
    """Only one formula file per font-<name> (no duplicate basenames)."""
    formula_files = list(FORMULA_DIR.glob("font-*.rb"))
    names = [p.stem for p in formula_files]
    seen = set()
    for n in names:
        assert n not in seen, f"Duplicate formula name: {n}.rb"
        seen.add(n)


def test_formula_count_matches_font_count():
    """Number of font-*.rb formulae equals number of font-* directories."""
    font_names = get_font_dir_names()
    formula_count = len(list(FORMULA_DIR.glob("font-*.rb")))
    assert formula_count == len(font_names), (
        f"Formula count ({formula_count}) != font dir count ({len(font_names)})"
    )