import uuid
from datetime import datetime, timezone

from sqlalchemy import DateTime, String, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


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


class Championship(Base):
    __tablename__ = "championships"

    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
    title: Mapped[str] = mapped_column(String(500), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    location: Mapped[str | None] = mapped_column(String(500))
    event_date: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    registration_open_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    registration_close_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    status: Mapped[str] = mapped_column(String(30), nullable=False, default="draft")
    # 'draft' | 'open' | 'closed' | 'completed'
    source: Mapped[str] = mapped_column(String(20), nullable=False, default="manual")
    # 'manual' | 'instagram'
    instagram_media_id: Mapped[str | None] = mapped_column(String(100), unique=True)
    image_url: Mapped[str | None] = mapped_column(String(1000))
    raw_caption_text: 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
    )

    registrations: Mapped[list["Registration"]] = relationship(
        back_populates="championship", cascade="all, delete-orphan"
    )
    participant_list: Mapped["ParticipantList | None"] = relationship(
        back_populates="championship", cascade="all, delete-orphan"
    )