"""Pinecone client singleton."""
from pinecone import Pinecone
from config import PINECONE_API_KEY, PINECONE_INDEX_NAME
from utils.logging import get_logger

logger = get_logger(__name__)

# Pinecone singleton
_pc_client = None
_index = None

def get_index():
    """
    Get Pinecone index instance (singleton pattern).

    Returns:
        Pinecone index instance
    """
    global _pc_client, _index

    if _index is None:
        logger.info("Initializing Pinecone client")
        _pc_client = Pinecone(api_key=PINECONE_API_KEY)
        _index = _pc_client.Index(PINECONE_INDEX_NAME)
        logger.info(f"Connected to Pinecone index: {PINECONE_INDEX_NAME}")

    return _index