"""Station config router: read/update the singleton station branding config."""

from fastapi import APIRouter, Depends, HTTPException, status

from app.auth import get_current_admin_user
from app.database import get_session
from app.models import StationConfig
from app.schemas import StationConfigResponse, StationConfigUpdate
from app.user_models import User
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

router = APIRouter()


@router.get("", response_model=StationConfigResponse)
async def get_station_config(session: AsyncSession = Depends(get_session)):
    """Return the singleton station config. Public endpoint."""
    result = await session.execute(
        select(StationConfig).where(StationConfig.key == "default")
    )
    config = result.scalar_one_or_none()
    if config is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Station config not found. Run seed to initialize.",
        )
    return config


@router.put("", response_model=StationConfigResponse)
async def update_station_config(
    payload: StationConfigUpdate,
    session: AsyncSession = Depends(get_session),
    current_user: User = Depends(get_current_admin_user),
):
    """Partial update of station config. Admin only."""
    result = await session.execute(
        select(StationConfig).where(StationConfig.key == "default")
    )
    config = result.scalar_one_or_none()
    if config is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Station config not found")

    for key, value in payload.model_dump(exclude_unset=True).items():
        setattr(config, key, value)

    await session.commit()
    await session.refresh(config)
    return config