"""Tests for formula content: correct paths and valid Ruby class name."""
import re

import pytest

from tests.conftest import FONT_FILES_DIR, FORMULA_DIR, get_font_dir_names


def formula_name_to_class(formula_name: str) -> str:
    """Same logic as generator: formula name to PascalCase (no hyphens)."""
    parts = re.split(r"[-_]+", formula_name)
    return "".join(p.capitalize() for p in parts if p)


@pytest.mark.parametrize("font_name", get_font_dir_names())
def test_formula_references_correct_font_path(font_name):
    """Generated formula contains the correct font_files/font-<name>/ path."""
    formula_path = FORMULA_DIR / f"{font_name}.rb"
    content = formula_path.read_text()
    # Install block should reference this font path
    assert f"font_files/{font_name}/" in content, (
        f"{font_name}: formula does not reference font_files/{font_name}/"
    )


@pytest.mark.parametrize("font_name", get_font_dir_names())
def test_formula_class_name_valid_and_matches(font_name):
    """Formula defines class Font<PascalCase> with no hyphens (valid Ruby)."""
    formula_path = FORMULA_DIR / f"{font_name}.rb"
    content = formula_path.read_text()
    formula_name = font_name.replace("font-", "", 1)
    expected_class = "Font" + formula_name_to_class(formula_name)
    # Class line: class FontSomething < Formula
    match = re.search(r"class\s+(Font\w+)\s+<\s+Formula", content)
    assert match, f"{font_name}: no 'class Font... < Formula' found"
    actual_class = match.group(1)
    assert "-" not in actual_class, (
        f"{font_name}: Ruby class name must not contain hyphens (got {actual_class})"
    )
    assert actual_class == expected_class, (
        f"{font_name}: expected class {expected_class}, got {actual_class}"
    )