from app.config import settings
from app.services.llm.base import LLMProvider


def get_llm_provider() -> LLMProvider:
    provider = settings.llm_provider.lower()
    if provider == "anthropic":
        from app.services.llm.anthropic import AnthropicProvider
        return AnthropicProvider()
    elif provider == "openai":
        from app.services.llm.openai_provider import OpenAIProvider
        return OpenAIProvider()
    elif provider == "ollama":
        from app.services.llm.ollama import OllamaProvider
        return OllamaProvider()
    else:
        raise ValueError(f"Unknown LLM provider: {provider}. Must be 'anthropic', 'openai', or 'ollama'.")