import uuid
from datetime import datetime
from sqlalchemy import String, DateTime
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship
from ..database import Base


class User(Base):
    __tablename__ = "users"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    owned_rooms = relationship("Room", back_populates="owner", cascade="all, delete-orphan")
    uploaded_tracks = relationship("Track", back_populates="uploader")
    messages = relationship("Message", back_populates="user")
    room_participations = relationship("RoomParticipant", back_populates="user", cascade="all, delete-orphan")