/**
 * Cache configuration for weather data
 *
 * TTL (Time To Live) values are set based on data volatility:
 * - Historical data: Never changes once recorded
 * - Geographic data: Static (grid coordinates, station locations)
 * - Forecasts: Updated approximately hourly
 * - Current conditions: Observations typically update every 20-60 minutes
 */
export declare const CacheConfig: {
    readonly enabled: boolean;
    readonly maxSize: number;
    readonly apiTimeoutMs: number;
    readonly ttl: {
        readonly gridCoordinates: number;
        readonly geocoding: number;
        readonly stations: number;
        readonly forecast: number;
        readonly currentConditions: number;
        readonly alerts: number;
        readonly recentHistorical: number;
        readonly historicalData: number;
        readonly normals: number;
        readonly serviceStatus: number;
        readonly floodDischarge: number;
        readonly nwpsGaugeDetail: number;
        readonly googlePollen: number;
        readonly records: number;
        readonly recordsStation: number;
        readonly metarObservations: number;
        readonly basemapTiles: number;
        readonly compositeImage: number;
        readonly reverseCountry: number;
        readonly firmsAreaQuery: number;
        readonly firmsRegionalFile: number;
        readonly capDocument: number;
        readonly jmaIndex: number;
        readonly eaLatestReadings: number;
        readonly eaStationDetail: number;
        readonly metnoForecast: number;
    };
};
/**
 * Determine appropriate TTL for historical weather data based on date
 * @param startDate Start date of the historical query
 * @returns TTL in milliseconds
 */
export declare function getHistoricalDataTTL(startDate: string | Date): number;
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