export interface GeoLocation {
    lat: number;
    lng: number;
}
export interface ContentWithLocation {
    id: string;
    title: string;
    type: string;
    primary_area: string;
    locations: Array<{
        area_id: string;
        lat: number;
        lng: number;
        relevance?: number;
    }>;
    primary_location: GeoLocation;
    [key: string]: any;
}
export interface SearchResult {
    content: ContentWithLocation;
    distance: number;
    nearestLocation: {
        area_id: string;
        lat: number;
        lng: number;
    };
    relevanceScore: number;
}
/**
 * Calculate distance between two points using Haversine formula
 * @returns Distance in miles
 */
export declare function calculateDistance(lat1: number, lng1: number, lat2: number, lng2: number): number;
/**
 * Determine if radius should be expanded based on results
 */
export declare function expandRadius(params: {
    currentRadius: number;
    resultsCount: number;
    minThreshold: number;
    maxRadius: number;
}): {
    shouldExpand: boolean;
    newRadius: number;
};
/**
 * Calculate relevance score based on distance
 * Uses exponential decay: score = 1 / (1 + distance * decayFactor)
 */
export declare function calculateRelevanceScore(params: {
    distanceMiles: number;
    decayFactor?: number;
}): number;
/**
 * Find content within a radius from user location
 */
export declare function findContentWithinRadius(params: {
    userLat: number;
    userLng: number;
    content: ContentWithLocation[];
    radiusMiles: number;
}): SearchResult[];
/**
 * Extract locations from text content
 */
export declare function extractLocationsFromText(text: string): Array<{
    area_id: string;
    lat: number;
    lng: number;
    relevance: number;
}>;
/**
 * Generate geohash for efficient geo queries
 * Implementation of simple geohash algorithm
 */
export declare function generateGeohash(lat: number, lng: number, precision?: number): string;
/**
 * Progressive search with radius expansion
 */
export declare function progressiveGeoSearch(params: {
    userLat: number;
    userLng: number;
    content: ContentWithLocation[];
    initialRadius?: number;
    maxRadius?: number;
    minResults?: number;
    radiusSteps?: number[];
}): Promise<{
    results: SearchResult[];
    finalRadius: number;
    expansions: number;
}>;
/**
 * Get geohash bounds for a circular area
 * This creates a bounding box that contains the circle
 */
export declare function getGeohashBounds(lat: number, lng: number, radiusMiles: number): Array<{
    lower: string;
    upper: string;
}>;