"""Plan 套餐模型。"""

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

from app.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin


class Plan(UUIDPrimaryKeyMixin, TimestampMixin, Base):
    """用户套餐（免费/基础/专业等）。

    技术审查 §2.2：plans 表。
    """

    __tablename__ = "plans"

    code: Mapped[str] = mapped_column(
        String(32),
        unique=True,
        nullable=False,
        comment="套餐代码 (free/basic/pro)",
    )
    name: Mapped[str] = mapped_column(
        String(64),
        nullable=False,
        comment="套餐名称",
    )
    storage_quota: Mapped[int] = mapped_column(
        Integer,
        nullable=False,
        comment="存储配额 (字节)",
    )
    max_file_size: Mapped[int] = mapped_column(
        Integer,
        nullable=False,
        comment="单文件大小上限 (字节)",
    )
    is_active: Mapped[bool] = mapped_column(
        Boolean,
        default=True,
        nullable=False,
        comment="是否可用",
    )

    # 关系
    users = relationship("User", back_populates="plan", lazy="selectin")

    def __repr__(self) -> str:
        return f"<Plan {self.code!r} ({self.name!r})>"