"""Startup-Seeds: erster Admin-Benutzer und die eingebauten Einheiten."""

from sqlalchemy.orm import Session

from .config import get_settings
from .models import Role, Unit, UnitKind, User
from .security import hash_password

# (Name, Art, Faktor zur kanonischen Basiseinheit)
BUILTIN_UNITS: list[tuple[str, UnitKind, float]] = [
    ("Stück", UnitKind.count, 1.0),
    ("Gramm", UnitKind.weight, 1.0),
    ("Kilogramm", UnitKind.weight, 1000.0),
    ("Milliliter", UnitKind.volume, 1.0),
    ("Liter", UnitKind.volume, 1000.0),
]


def ensure_builtin_units(db: Session) -> None:
    changed = False
    for name, kind, factor in BUILTIN_UNITS:
        if not db.query(Unit).filter(Unit.name == name).first():
            db.add(Unit(name=name, kind=kind, factor=factor, is_builtin=True))
            changed = True
    if changed:
        db.commit()


def ensure_first_admin(db: Session) -> None:
    settings = get_settings()
    has_users = db.query(User).first() is not None
    if has_users:
        return
    admin = User(
        username=settings.admin_username,
        password_hash=hash_password(settings.admin_password),
        role=Role.admin,
    )
    db.add(admin)
    db.commit()