from abc import ABC, abstractmethod
from typing import List

class ParaphrasingModel(ABC):
    """
    Abstract base class for paraphrasing models (e.g., T5, GPT).
    """
    @abstractmethod
    def paraphrase(self, text: str) -> str:
        """Paraphrase the given text."""
        pass

    def paraphrase_batch(self, texts: List[str]) -> List[str]:
        """
        Paraphrase a list of texts.
        Default implementation loops, but subclasses should override for GPU batching.
        """
        return [self.paraphrase(text) for text in texts]

class TextProcessingMode(ABC):
    """
    Abstract base class for text processing modes (Strategy Pattern).
    Defines HOW the text is broken down and processed (e.g., by paragraph, random sentences).
    """
    @abstractmethod
    def process(self, text: str, paraphraser: ParaphrasingModel) -> str:
        """
        Process a block of text using the provided paraphraser.
        """
        pass