from fastapi import Depends, File, UploadFile, APIRouter
from sqlalchemy.ext.asyncio import AsyncSession
from starlette.responses import FileResponse

from app.database.session import get_db
from app.domain.entities.contest_carousel_photo import ContestCarouselPhotoEntity
from app.infrastructure.contest_carousel_photos_service import ContestCarouselPhotosService

router = APIRouter()

@router.get(
    "/contests/{contest_id}/",
    response_model=list[ContestCarouselPhotoEntity],
    summary="Get all carousel photos metadata for a contest",
    description="Returns metadata of all carousel photos for the given contest_id",
)
async def get_photos_by_contest_id(
        contest_id: int,
        db: AsyncSession = Depends(get_db),
):
    service = ContestCarouselPhotosService(db)
    return await service.get_photos_by_contest_id(contest_id)


@router.get(
    "/{photo_id}/file",
    response_class=FileResponse,
    summary="Download carousel photo file by photo ID",
    description="Returns the image file for the given carousel photo ID",
)
async def download_photo_file(
        photo_id: int,
        db: AsyncSession = Depends(get_db),
):
    service = ContestCarouselPhotosService(db)
    return await service.get_photo_file_by_id(photo_id)


@router.post(
    "/contests/{contest_id}/upload",
    response_model=ContestCarouselPhotoEntity,
    summary="Upload a new carousel photo for a contest",
    description="Uploads a new photo file and associates it with the given contest ID",
)
async def upload_photo(
        contest_id: int,
        file: UploadFile = File(...),
        db: AsyncSession = Depends(get_db),
):
    service = ContestCarouselPhotosService(db)
    return await service.upload_photo(contest_id, file)


@router.delete(
    "/{photo_id}/",
    response_model=ContestCarouselPhotoEntity,
    summary="Delete a carousel photo by ID",
    description="Deletes a carousel photo and its file from storage",
)
async def delete_photo(
        photo_id: int,
        db: AsyncSession = Depends(get_db),
):

    service = ContestCarouselPhotosService(db)

    return await service.delete_photo(photo_id)