"""
Configuration module for RAG Book Chatbot.
Loads configuration from environment variables.
"""

import os
from typing import Dict, Any


def get_config() -> Dict[str, Any]:
    """
    Get configuration from environment variables.

    Returns:
        Dictionary containing all required configuration

    Raises:
        ValueError: If required environment variables are missing
    """
    config = {
        "openai_api_key": os.getenv("OPENAI_API_KEY"),
        "cohere_api_key": os.getenv("COHERE_API_KEY"),
        "qdrant_url": os.getenv("QDRANT_URL"),
        "qdrant_api_key": os.getenv("QDRANT_API_KEY"),
        "qdrant_collection": os.getenv("QDRANT_COLLECTION", "book_embeddings"),
    }

    # Validate required keys
    required_keys = ["cohere_api_key", "qdrant_url", "qdrant_api_key"]
    missing_keys = [key for key in required_keys if not config[key]]

    if missing_keys:
        raise ValueError(
            f"Missing required environment variables: {', '.join(missing_keys)}"
        )

    return config