from datetime import date
from io import BytesIO

from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.responses import StreamingResponse

from ..config import Config, get_config
from ._image import AdventImage
from ._misc import get_image, shuffle
from .user import user_is_admin

router = APIRouter(prefix="/days", tags=["days"])


@router.on_event("startup")
async def startup() -> None:
    cfg = await get_config()
    print(cfg.solution)
    print("".join(await shuffle(cfg.solution)))


@router.get("/letter/{index}")
async def get_letter(
    index: int,
    cfg: Config = Depends(get_config),
) -> str:
    return (await shuffle(cfg.solution))[index]


@router.get("/date")
async def get_date() -> str:
    return date.today().isoformat()


async def user_can_view(
    index: int,
) -> bool:
    today = date.today()

    if today.month in (1, 2, 3):
        return True

    elif today.month == 12:
        return index < today.day

    return False


@router.get(
    "/image/{index}",
    response_class=StreamingResponse,
)
async def get_image_for_day(
    image: AdventImage = Depends(get_image),
    can_view: bool = Depends(user_can_view),
    is_admin: bool = Depends(user_is_admin),
) -> StreamingResponse:
    """
    Bild für einen Tag erstellen
    """

    if not (can_view or is_admin):
        raise HTTPException(status.HTTP_401_UNAUTHORIZED, "Wie unhöflich!!!")

    # Bilddaten in Puffer laden
    img_buffer = BytesIO()
    image.img.save(img_buffer, format="JPEG", quality=85)
    img_buffer.seek(0)

    return StreamingResponse(
        content=img_buffer,
        media_type="image/jpeg",
    )