"""技能标签模型"""
from .base import Base
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy import BigInteger, VARCHAR, Boolean, Integer, Text
from typing import List, Optional


class SkillTag(Base):
    __tablename__ = "skill_tags"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    name: Mapped[str] = mapped_column(VARCHAR(255), nullable=False)
    slug: Mapped[str] = mapped_column(VARCHAR(80), nullable=False, index=True)
    category: Mapped[str] = mapped_column(VARCHAR(100), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    is_system: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0)

    user_bindings: Mapped[List["UserSkillBinding"]] = relationship(
        "UserSkillBinding", back_populates="skill_tag", cascade="all, delete-orphan"
    )