from typing import Dict, Any

SERVICE_REGISTRY: Dict[str, Dict[str, Any]] = {}


def register_service(service_type: str, provider_name: str, implementation: Any):
    SERVICE_REGISTRY.setdefault(service_type, {})[provider_name] = implementation


def get_service(service_type: str, provider_name: str):
    provider_dict = SERVICE_REGISTRY.get(service_type, {})
    service_class = provider_dict.get(provider_name)
    if service_class is None:
        raise ValueError(
            f"未找到服务类型 '{service_type}' 和提供商 '{provider_name}' 对应的实现。"
        )
    return service_class