from datetime import datetime

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

from app.db.base import Base


class PushSubscription(Base):
    __tablename__ = "push_subscriptions"
    __table_args__ = (UniqueConstraint("user_id", "endpoint", name="uq_push_user_endpoint"),)

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), index=True)
    endpoint: Mapped[str] = mapped_column(Text)
    p256dh: Mapped[str | None] = mapped_column(String(256))
    auth: Mapped[str | None] = mapped_column(String(256))
    user_agent: Mapped[str | None] = mapped_column(String(256))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )

    user = relationship("User", back_populates="push_subscriptions")