from sqlmodel import SQLModel, Field, Relationship


class HackathonParticipant(SQLModel, table=True):
    """Регистрация участника на хакатон (many-to-many: User <-> Hackathon)."""

    __tablename__ = "hackathon_participants"

    id: int | None = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="users.id")
    hackathon_id: int = Field(foreign_key="hackathons.id")
    is_confirmed: bool = Field(default=False)

    # Relationships
    user: "User" = Relationship(back_populates="registrations")
    hackathon: "Hackathon" = Relationship(back_populates="participants")