from logging import getLogger
from typing import Callable

from PIL import Image

from ..params import ImageParams, Size, StageParams
from ..server import ServerContext
from ..worker import WorkerContext
from .stage import BaseStage

logger = getLogger(__name__)


class SourceNoiseStage(BaseStage):
    def run(
        self,
        _job: WorkerContext,
        _server: ServerContext,
        _stage: StageParams,
        _params: ImageParams,
        source: Image.Image,
        *,
        size: Size,
        noise_source: Callable,
        stage_source: Image.Image,
        **kwargs,
    ) -> Image.Image:
        source = stage_source or source
        logger.info("generating image from noise source")

        if source is not None:
            logger.warn(
                "a source image was passed to a noise stage, but will be discarded"
            )

        output = noise_source(source, (size.width, size.height), (0, 0))

        logger.info("final output image size: %sx%s", output.width, output.height)
        return output