import { Firestore } from '@google-cloud/firestore';
export interface GeohashQueryResult {
    id: string;
    distance: number;
    data: any;
}
export declare class GeohashFirestoreQuery {
    private geohashService;
    constructor();
    /**
     * Perform efficient geohash-based query on Firestore
     */
    queryByRadius(db: Firestore, collection: string, centerLat: number, centerLng: number, radius: number, filters?: Record<string, any>): Promise<GeohashQueryResult[]>;
    /**
     * Execute a single range query
     */
    private executeRangeQuery;
    /**
     * Deduplicate results and filter by exact radius
     */
    private deduplicateAndFilter;
    /**
     * Calculate distance between two points
     */
    private haversineDistance;
    /**
     * Progressive radius search - start small and expand if needed
     */
    progressiveRadiusSearch(db: Firestore, collection: string, centerLat: number, centerLng: number, options?: {
        initialRadius?: number;
        maxRadius?: number;
        minResults?: number;
        filters?: Record<string, any>;
    }): Promise<GeohashQueryResult[]>;
}