"""
SSH 密钥 ORM 模型.
"""
from sqlalchemy import String, Integer, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship
from app.database import Base
from typing import Optional, List


class SshKey(Base):
    """
    SSH 密钥模型.

    存储加密的 SSH 私钥，用于 Git 操作.
    """
    __tablename__ = "ssh_keys"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    name: Mapped[str] = mapped_column(String(100), nullable=False, unique=True)
    private_key: Mapped[str] = mapped_column(Text, nullable=False)
    fingerprint: Mapped[Optional[str]] = mapped_column(String(64), nullable=True)
    created_at: Mapped[int] = mapped_column(Integer, nullable=False)

    # 关系
    servers: Mapped[List["Server"]] = relationship("Server", back_populates="ssh_key")

    def __repr__(self) -> str:
        return f"<SshKey(id={self.id}, name='{self.name}', fingerprint='{self.fingerprint}')>"