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

from backend.models.base import Base


class Summary(Base):
    __tablename__ = "summaries"

    id: Mapped[int] = mapped_column(primary_key=True)
    subreddit_id: Mapped[int] = mapped_column(
        ForeignKey("monitored_subreddits.id"), nullable=False
    )
    summary_type: Mapped[str] = mapped_column(String(50), nullable=False)
    content: Mapped[str | None] = mapped_column()
    metadata_: Mapped[dict | None] = mapped_column("metadata", JSON)
    period_start: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    period_end: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    provider: Mapped[str | None] = mapped_column(String(100))
    generated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )

    subreddit: Mapped["MonitoredSubreddit"] = relationship(back_populates="summaries")  # noqa: F821