from datetime import datetime
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy import String, Text, Integer, DateTime, func
from models.base import Base


class Article(Base):
    __tablename__ = "t_article"

    id: Mapped[int] = mapped_column(
        Integer,
        primary_key=True,
        autoincrement=True,
        comment="自动递增的唯一内容ID"
    )

    title: Mapped[str] = mapped_column(
        String(256),
        nullable=False,
        index=True,
        comment="标题"
    )

    keywords: Mapped[str | None] = mapped_column(
        Text,
        nullable=True,
        comment="关键词"
    )

    content: Mapped[str | None] = mapped_column(
        Text,
        nullable=True,
        comment="内容"
    )

    create_time: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False,
        comment="创建时间"
    )

    used: Mapped[bool] = mapped_column(
        default=False,
        nullable=False,
        comment="是否已被使用"
    )

    def __repr__(self):
        return f"<Article id={self.id} title={self.title!r} used={self.used!r}>"