from datetime import datetime

from sqlalchemy import Boolean, DateTime, Integer, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column

from app.database import Base


class Storage(Base):
    """备份目标存储（local 路径 或 S3 桶）。

    config_json 是 Fernet 加密的 JSON 字符串，结构因 type 而异：
      - local: {"path": "/data/backups"}
      - s3:    {"endpoint_url": "...", "region": "...", "bucket": "...",
                "access_key": "...", "secret_key": "...", "use_ssl": true,
                "path_prefix": "optional/prefix"}
    """

    __tablename__ = "storages"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    name: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
    type: Mapped[str] = mapped_column(String(16), nullable=False)  # 'local' / 's3'
    config_json: Mapped[str] = mapped_column(Text, nullable=False)
    is_default: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now(), nullable=False
    )