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 SiteRole(Base):
    __tablename__ = "site_roles"
    __table_args__ = (UniqueConstraint("site_id", "role_id", name="uq_site_roles_site_role"),)

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