import pytest


def get_all_router_modules():
    """Dynamically discover all router modules, including submodules."""
    import importlib
    import pkgutil

    import src.backend.routers

    def walk_modules(package):
        modules = []
        for module_info in pkgutil.iter_modules(package.__path__):
            full_name = f"{package.__name__}.{module_info.name}"
            if module_info.ispkg:
                subpkg = importlib.import_module(full_name)
                modules.extend(walk_modules(subpkg))
            else:
                modules.append(full_name)
        return modules

    found = walk_modules(src.backend.routers)
    assert found, "No router modules found!"
    return found


@pytest.mark.parametrize("router_module", get_all_router_modules())
def test_router_module_has_route_defined(router_module):
    """Ensure route module has a ROUTE defined."""
    module = __import__(router_module, fromlist=[""])
    assert hasattr(module, "ROUTE"), f"Module {router_module} does not define ROUTE"
    assert isinstance(module.ROUTE, str), f"ROUTE in {router_module} is not a string"
    assert module.ROUTE.startswith(
        "/"
    ), f"ROUTE in {router_module} does not start with '/'"