import uuid
from datetime import datetime, timezone
from sqlmodel import SQLModel, Field, Column
from sqlalchemy import JSON


class Notification(SQLModel, table=True):
    __tablename__ = "notifications"

    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    user_id: uuid.UUID = Field(foreign_key="users.id", index=True)
    type: str = Field(
        max_length=32
    )  # zone_captured | leaderboard_change | streak_risk | friend_joined | raid_weekend
    payload: dict = Field(default_factory=dict, sa_column=Column(JSON))
    sent_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
    read_at: datetime | None = None