"""管理会计OS — 知识库文章（P1-3 嵌入功能模块用）

与 KnowledgeSummary/KnowledgeEvent（AI摘要系统）不同，此表存储静态的CMA知识文章，
用于在功能模块右侧/底部嵌入展示。
"""
from sqlalchemy import Column, Integer, String, Text, DateTime, func
from app.database import Base


class KnowledgeArticle(Base):
    """知识库文章"""
    __tablename__ = "knowledge_articles"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String(200), nullable=False, comment="文章标题")
    summary = Column(String(500), nullable=True, comment="一句话摘要")
    content = Column(Text, nullable=False, comment="文章正文（支持Markdown）")
    category = Column(String(50), nullable=True, comment="分类: term/formula/practice/faq")
    icon = Column(String(10), default="📖", comment="图标")
    related_page = Column(String(200), nullable=True, comment="关联页面路由，如 /maps/canvas/:id, /kpis, /budget, /deviations, /predict, /maps-review")
    sort_order = Column(Integer, default=0, comment="排序")
    created_at = Column(DateTime, server_default=func.now())
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())