"""strategy 表（M8.3）。"""

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 StrategyModel(Base):
    __tablename__ = "strategy"

    id: Mapped[str] = mapped_column(String(32), primary_key=True)
    name: Mapped[str] = mapped_column(String(64), unique=True)
    description: Mapped[str] = mapped_column(String(300), default="")
    # 2026-09 重构后策略库只存选股策略，新行一律 selection（历史行的 backtest 由数据迁移收敛）
    spec_type: Mapped[str] = mapped_column(String(16), default="selection")
    config_json: Mapped[str] = mapped_column(Text)
    version: Mapped[str] = mapped_column(String(16), default="1")
    created_at: Mapped[datetime] = mapped_column(DateTime)