from langchain_community.llms import OpenAI
from langchain.chains.summarize import load_summarize_chain
from utils import openai_llm


def setup_summary_chain(api_key):
    """Set up a summary chain with a specified LLM."""
    llm = openai_llm(api_key=api_key)
    return load_summarize_chain(llm=llm, chain_type='map_reduce')

def summarize_documents(documents, api_key):
    """Generate summaries for provided documents."""
    summary_chain = setup_summary_chain(api_key)
    return summary_chain.run(documents)