type Metric = "angular" | "euclidean" | "manhattan" | "dot";
interface NearestNeighborsResult {
    neighbors: number[];
    distances: number[];
}
declare class AnnoyIndex {
    private index;
    constructor(f: number, metric?: Metric);
    addItem(index: number, vector: number[]): void;
    build(numTrees: number, numThreads?: number): void;
    unbuild(): void;
    save(filename: string, prefault?: boolean): void;
    load(filename: string, prefault?: boolean): void;
    unload(): void;
    getDistance(i: number, j: number): number;
    getNnsByItem(item: number, n: number, searchK: number, includeDistances: true): NearestNeighborsResult;
    getNnsByItem(item: number, n: number, searchK?: number, includeDistances?: false): number[];
    getNnsByVector(vector: number[], n: number, searchK: number, includeDistances: true): NearestNeighborsResult;
    getNnsByVector(vector: number[], n: number, searchK?: number, includeDistances?: false): number[];
    getNItems(): number;
    getNTrees(): number;
    getItem(item: number): number[];
    setSeed(seed: number): void;
    onDiskBuild(filename: string): void;
    verbose(v: boolean): void;
    getF(): number;
}

export { AnnoyIndex, type Metric, type NearestNeighborsResult, AnnoyIndex as default };