import importlib
import pkgutil
import subprocess
import sys
from pathlib import Path

import pytest

import app

ROOT = Path(app.__file__).resolve().parent.parent
MODULES = sorted(info.name for info in pkgutil.walk_packages(app.__path__, "app."))
TOP_LEVEL = sorted({name.split(".")[1] for name in MODULES} | {"main"})
FRESH_IMPORT_TIMEOUT = 60


@pytest.mark.parametrize("name", MODULES)
def test_module_imports(name):
    importlib.import_module(name)


@pytest.mark.parametrize("name", TOP_LEVEL)
def test_top_level_import_in_fresh_interpreter(name):
    # Zyklen zeigen sich oft nur, wenn ein Modul als erstes importiert wird.
    result = subprocess.run([sys.executable, "-c", f"import app.{name}"], cwd=ROOT, capture_output=True,
                            text=True, timeout=FRESH_IMPORT_TIMEOUT)
    assert result.returncode == 0, result.stderr[-2000:]