from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from datetime import datetime, timezone
from database import Base


def _utcnow():
    return datetime.now(timezone.utc)


class PosSettings(Base):
    __tablename__ = "pos_settings"

    key = Column(String, primary_key=True)
    value = Column(String, nullable=False)
    updated_at = Column(DateTime(timezone=True), default=_utcnow, onupdate=_utcnow, nullable=False)
    updated_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)

    updated_by = relationship("User", foreign_keys=[updated_by_id])