from datetime import datetime
from uuid import uuid4

from sqlalchemy import DateTime, ForeignKey, UniqueConstraint, func
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base import Base


class UserSite(Base):
    __tablename__ = "user_sites"
    __table_args__ = (UniqueConstraint("user_id", "site_id", name="uq_user_sites_user_site"),)

    id: Mapped[str] = mapped_column(UUID(as_uuid=False), primary_key=True, default=lambda: str(uuid4()))
    user_id: Mapped[str] = mapped_column(UUID(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    site_id: Mapped[str] = mapped_column(UUID(as_uuid=False), ForeignKey("sites.id", ondelete="CASCADE"), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False
    )