from types import SimpleNamespace

from da3_compat import resolve_da3_class


def test_da3_resolver_prefers_api_module():
    marker = object()
    modules = {"depth_anything_3.api": SimpleNamespace(DepthAnything3=marker)}
    def importer(location):
        if location not in modules:
            raise ModuleNotFoundError(location)
        return modules[location]
    cls, location = resolve_da3_class(importer)
    assert cls is marker
    assert location == "depth_anything_3.api"


def test_da3_resolver_supports_package_root_and_reports_failures():
    marker = object()
    modules = {"depth_anything_3": SimpleNamespace(DepthAnything3=marker)}
    def importer(location):
        if location not in modules:
            raise ModuleNotFoundError(location)
        return modules[location]
    cls, location = resolve_da3_class(importer)
    assert cls is marker
    assert location == "depth_anything_3"

    try:
        resolve_da3_class(lambda location: (_ for _ in ()).throw(ModuleNotFoundError(location)))
    except ImportError as exc:
        assert "depth_anything_3.api" in str(exc)
        assert "depth_anything_3" in str(exc)
    else:
        raise AssertionError("missing DA3 modules should raise ImportError")