"""因子组合表（M7.2b）。

factor_composite：可保存/复用的因子组合定义；components 以 JSON 存
（组件方向冗余快照自因子注册表，计算时以注册表为准）。
"""

from __future__ import annotations

from datetime import datetime

from sqlalchemy import DateTime, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.infrastructure.persistence.sqlalchemy.base import Base


class FactorCompositeModel(Base):
    __tablename__ = "factor_composite"

    id: Mapped[str] = mapped_column(String(32), primary_key=True)
    name: Mapped[str] = mapped_column(String(64), unique=True)
    method: Mapped[str] = mapped_column(String(16), default="fixed")
    description: Mapped[str] = mapped_column(String(300), default="")
    components_json: Mapped[str] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime)