import { PrismaClient } from '@prisma/client';
import type { Station, Route, StationRef, AlarmWithRelations, CreateAlarmInput, CreateOnceAlarmInput, UpdateAlarmInput } from './types.js';
/**
 * Initialise PrismaClient singleton.
 * Automatically runs `prisma migrate deploy` so the DB schema is up-to-date.
 */
export declare function initDb(): Promise<PrismaClient>;
/** Return the initialised PrismaClient. Throws if `initDb()` has not been called. */
export declare function getDb(): PrismaClient;
/** Disconnect PrismaClient and reset the singleton. */
export declare function closeDb(): Promise<void>;
/** Upsert an array of stations, returning the mapped results. */
export declare function upsertStations(stations: Station[]): Promise<Station[]>;
/** Upsert an array of routes, returning the mapped results. */
export declare function upsertRoutes(routes: Route[]): Promise<Route[]>;
/** Find a station by id and return a lightweight StationRef. */
export declare function findStationById(stationId: string): Promise<StationRef | null>;
/** Create an alarm with nested schedules and channels. */
export declare function createAlarm(input: CreateAlarmInput): Promise<AlarmWithRelations>;
/** List all alarms with their station, route, schedules, and channels. */
export declare function listAlarms(): Promise<AlarmWithRelations[]>;
/** Find a single alarm by id, or return null. */
export declare function findAlarm(alarmId: string): Promise<AlarmWithRelations | null>;
/**
 * Update an alarm. If `schedules` or `channels` are provided in the input
 * the existing child rows are deleted and recreated.
 */
export declare function updateAlarm(alarmId: string, input: UpdateAlarmInput): Promise<AlarmWithRelations>;
/** Delete an alarm by id. Cascading deletes handle children. */
export declare function deleteAlarm(alarmId: string): Promise<void>;
/** Create a one-time alarm (no schedules). */
export declare function createOnceAlarm(input: CreateOnceAlarmInput): Promise<AlarmWithRelations>;
/** Mark a one-time alarm as fired. */
export declare function markAlarmFired(alarmId: string): Promise<void>;
/**
 * List all *active* alarms whose schedule matches the given `now` timestamp.
 *
 * "Active" means:
 *   - RECURRING: `enabled` is true and at least one schedule row matches now.
 *   - ONCE: `enabled` is true, `firedAt` is null, and `activeUntil` is null or >= now.
 */
export declare function listActiveAlarms(now: Date): Promise<AlarmWithRelations[]>;
/**
 * Check whether a notification log exists for the given alarm + vehicle
 * combination since the provided timestamp.
 */
export declare function hasRecentNotification(alarmId: string, vehicleId: string, since: Date): Promise<boolean>;
/** Create a notification log entry. */
export declare function createNotificationLog(input: {
    alarmId: string;
    vehicleId: string;
    message: string;
    channel: string;
}): Promise<void>;
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