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

from backend.models.base import Base


class MonitoredSubreddit(Base):
    __tablename__ = "monitored_subreddits"

    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
    display_name: Mapped[str | None] = mapped_column(String(255))
    description: Mapped[str | None] = mapped_column()
    subscribers: Mapped[int | None] = mapped_column(Integer)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )

    posts: Mapped[list["Post"]] = relationship(back_populates="subreddit")  # noqa: F821
    daily_digests: Mapped[list["DailyDigest"]] = relationship(back_populates="subreddit")  # noqa: F821
    summaries: Mapped[list["Summary"]] = relationship(back_populates="subreddit")  # noqa: F821