from __future__ import annotations

from app import db
from app.lab.db_guard import retry_locked
from app.lab.models import LabRecipeRation
from app.models import Recipe


@retry_locked
def ensure_empty_master(recipe_id: str, user_id: str = "system") -> dict:
    recipe = Recipe.query.filter_by(id=recipe_id, is_deleted=False).first()
    if recipe is None:
        raise LookupError("Рецепт не найден")
    existing = LabRecipeRation.query.filter_by(recipe_id=recipe_id, is_deleted=False).first()
    if existing is not None:
        return {"recipeId": recipe_id, "created": False}
    header = LabRecipeRation(recipe_id=recipe_id, created_by=user_id, updated_by=user_id)
    db.session.add(header)
    db.session.commit()
    return {"recipeId": recipe_id, "created": True}