from typing import Optional
from schemas.enums import NotificationLevel
from schemas.models import NotificationModel
from database.db import DatabaseManager
from telemetry.event_bus import EventBus


class NotificationEngine:
    """Central notification center managing persisted system alerts and WS events."""

    def __init__(self, db: DatabaseManager, event_bus: EventBus):
        self.db = db
        self.event_bus = event_bus

    async def notify(self, level: NotificationLevel, title: str, message: str, mission_id: Optional[str] = None) -> NotificationModel:
        notif = NotificationModel(level=level, title=title, message=message, mission_id=mission_id)
        await self.db.save_notification(notif)
        await self.event_bus.emit("NotificationCreated", mission_id or "system", "NotificationEngine", notif.model_dump())
        return notif