/**
 * MRT Exit Service
 * Provides MRT station exit information for precise navigation
 */
import { CacheService } from './cache.js';
export interface MRTExit {
    stationName: string;
    exitCode: string;
    coordinates: {
        latitude: number;
        longitude: number;
    };
    distance?: number;
}
export interface MRTExitRecommendation {
    stationName: string;
    recommendedExit: MRTExit;
    alternativeExits: MRTExit[];
    walkingDistance: number;
    walkingTime: number;
    reason: string;
}
export declare class MRTExitService {
    private cache;
    private mrtExitData;
    private dataLoaded;
    constructor(cache: CacheService);
    /**
     * Load MRT exit data from Singapore's open data
     */
    loadMRTExitData(): Promise<void>;
    /**
     * Find the best MRT exit for a destination
     */
    findBestMRTExit(stationName: string, destinationLat: number, destinationLng: number): Promise<MRTExitRecommendation | null>;
    /**
     * Get all exits for a specific station
     */
    getStationExits(stationName: string): Promise<MRTExit[]>;
    /**
     * Find nearby MRT exits within a radius
     */
    findNearbyMRTExits(latitude: number, longitude: number, radiusMeters?: number): Promise<MRTExit[]>;
    private normalizeStationName;
    private calculateDistance;
    private generateExitReason;
}