from sqlalchemy import Column, DateTime, ForeignKey, Integer, String
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.db.session import Base


class Backup(Base):
    __tablename__ = "backups"

    id = Column(Integer, primary_key=True, index=True)
    router_id = Column(Integer, ForeignKey("routers.id"), nullable=False, index=True)
    file_path = Column(String(500), nullable=False)
    file_name = Column(String(255), nullable=False)
    backup_type = Column(String(50), nullable=False, default="export")
    checksum = Column(String(64), nullable=True)
    created_at = Column(DateTime, server_default=func.now(), nullable=False)

    router = relationship("Router", back_populates="backups")