from __future__ import annotations
from datetime import datetime
from uuid import uuid4
from sqlalchemy import String, ForeignKey, Boolean, DateTime, Index, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column
from app.security.models import Base, utcnow

class NotificationPreference(Base):
    __tablename__ = "notification_preferences"
    __table_args__ = (
        UniqueConstraint("workspace_id", "user_id", "event_type", name="uq_notification_preference"),
        Index("ix_notification_preferences_workspace_user", "workspace_id", "user_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    event_type: Mapped[str] = mapped_column(String(50), nullable=False)
    enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)