from abc import ABC, abstractmethod
from typing import Any, Sequence

from PIL import Image

from services.image.ImageGenerationResult import ImageGenerationResult
from services.progress import ProgressCallback
from services.services import GenerationService, TaskType


class ImageGenerator(GenerationService, ABC):
    """Base class for image generation backends."""

    task_type = TaskType.IMAGE

    @abstractmethod
    def generate(
            self,
            prompt: str,
            images: Sequence[Image.Image] | None = None,
            *,
            progress: ProgressCallback | None = None,
            aspect_ratio: str | None = None,
            **kwargs: Any,
    ) -> ImageGenerationResult:

        """Generate images from a prompt and optional images. """
        
        raise NotImplementedError