from io import BytesIO
from logging import getLogger
from typing import List

import requests
from PIL import Image

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

logger = getLogger(__name__)


class SourceURLStage(BaseStage):
    def run(
        self,
        _worker: WorkerContext,
        _server: ServerContext,
        _stage: StageParams,
        _params: ImageParams,
        sources: List[Image.Image],
        *,
        source_urls: List[str],
        stage_source: Image.Image,
        **kwargs,
    ) -> List[Image.Image]:
        logger.info("loading image from URL source")

        if len(sources) > 0:
            logger.warn(
                "a source image was passed to a source stage, and will be discarded"
            )

        outputs = []
        for url in source_urls:
            response = requests.get(url)
            output = Image.open(BytesIO(response.content))

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

        return outputs