from datetime import datetime, timezone
from sqlalchemy import String, Integer, DateTime
from sqlalchemy.orm import Mapped, mapped_column, relationship

from backend.models.base import Base


class Author(Base):
    __tablename__ = "authors"

    id: Mapped[int] = mapped_column(primary_key=True)
    username: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
    first_seen_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )
    last_seen_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )
    total_posts: Mapped[int] = mapped_column(Integer, default=0)
    total_comments: Mapped[int] = mapped_column(Integer, default=0)

    posts: Mapped[list["Post"]] = relationship(back_populates="author")  # noqa: F821
    comments: Mapped[list["Comment"]] = relationship(back_populates="author")  # noqa: F821