import uuid
from datetime import datetime, timezone

from sqlalchemy import Boolean, DateTime, ForeignKey, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


def _now() -> datetime:
    return datetime.now(timezone.utc)


class ParticipantList(Base):
    __tablename__ = "participant_lists"

    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
    championship_id: Mapped[uuid.UUID] = mapped_column(
        ForeignKey("championships.id", ondelete="CASCADE"), unique=True, nullable=False
    )
    published_by: Mapped[uuid.UUID] = mapped_column(
        ForeignKey("users.id"), nullable=False
    )
    is_published: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    notes: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=_now, onupdate=_now
    )

    championship: Mapped["Championship"] = relationship(back_populates="participant_list")
    organizer: Mapped["User"] = relationship()