from abc import ABC, abstractmethod
from typing import List, Dict, Any

class BaseEngine(ABC):
    @abstractmethod
    def process(self, image_path: str) -> Any:
        pass

class BaseOCR(BaseEngine):
    @abstractmethod
    def extract_text(self, image_path: str) -> str:
        pass

class BaseVLM(BaseEngine):
    @abstractmethod
    def extract_structured_data(self, image_path: str, prompt: str) -> Dict[str, Any]:
        pass

class BaseNER(BaseEngine):
    @abstractmethod
    def extract_entities(self, text: str, labels: List[str]) -> Dict[str, List[str]]:
        pass