from app.providers.base import AIProvider


def get_provider(ai_config: dict) -> AIProvider:
    """Return an AIProvider instance for the active provider in the config."""
    provider_name = ai_config.get("provider", "lmstudio")
    provider_cfg = ai_config.get(provider_name, {})

    match provider_name:
        case "anthropic":
            from app.providers.anthropic_provider import AnthropicProvider
            return AnthropicProvider(provider_cfg)
        case "ollama" | "lmstudio":
            from app.providers.openai_compat import OpenAICompatProvider
            return OpenAICompatProvider(provider_cfg, provider_name=provider_name)
        case _:
            raise ValueError(f"Unknown AI provider: {provider_name!r}")


__all__ = ["AIProvider", "get_provider"]