from __future__ import annotations

from abc import ABC, abstractmethod

from PIL import Image

from src.schemas.segmentation import MaskResult


class Segmenter(ABC):
    """Segments a detected finding given its bounding box (Stage 2)."""

    @abstractmethod
    def segment(
        self,
        image: Image.Image,
        bbox_normalized: list[int],
        finding_label: str,
        image_path: str,
        image_index: int,
    ) -> MaskResult:
        """Return a MaskResult for one finding on one image view.

        bbox_normalized: [y0, x0, y1, x1] in [0, 1000] space (matches BBox.box_2d).
        """