from typing import TYPE_CHECKING, Any

from langchain._api import create_importer

if TYPE_CHECKING:
    from langchain_community.vectorstores import LLMRails
    from langchain_community.vectorstores.llm_rails import LLMRailsRetriever

# Create a way to dynamically look up deprecated imports.
# Used to consolidate logic for raising deprecation warnings and
# handling optional imports.
DEPRECATED_LOOKUP = {
    "LLMRails": "langchain_community.vectorstores",
    "LLMRailsRetriever": "langchain_community.vectorstores.llm_rails",
}

_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)


def __getattr__(name: str) -> Any:
    """Look up attributes dynamically."""
    return _import_attribute(name)


__all__ = [
    "LLMRails",
    "LLMRailsRetriever",
]