from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from ..database import get_db
from ..deps import get_current_user, require_admin
from ..models import Group, User
from ..schemas import GroupCreate, GroupOut

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


@router.get("", response_model=list[GroupOut])
def list_groups(
    db: Session = Depends(get_db), _: User = Depends(get_current_user)
) -> list[Group]:
    return db.query(Group).order_by(Group.name).all()


@router.post("", response_model=GroupOut, status_code=status.HTTP_201_CREATED)
def create_group(
    payload: GroupCreate,
    db: Session = Depends(get_db),
    _: User = Depends(require_admin),
) -> Group:
    if db.query(Group).filter(Group.name == payload.name).first():
        raise HTTPException(status.HTTP_409_CONFLICT, "Gruppe existiert bereits")
    group = Group(name=payload.name, min_stock=payload.min_stock)
    db.add(group)
    db.commit()
    db.refresh(group)
    return group


@router.delete("/{group_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_group(
    group_id: int,
    db: Session = Depends(get_db),
    _: User = Depends(require_admin),
) -> None:
    group = db.get(Group, group_id)
    if group is None:
        raise HTTPException(status.HTTP_404_NOT_FOUND, "Gruppe nicht gefunden")
    db.delete(group)
    db.commit()