import type { VectorRecord, VectorSearchOptions, VectorSearchResult } from './types';
/**
 * 计算 modelId 的 short hash
 */
export declare function hashModelId(modelId: string): string;
/**
 * 向量存储抽象基类
 *
 * 提供公共工具方法，子类实现具体的数据库操作
 */
export declare abstract class VectorStore {
    /** 默认向量维度 */
    protected readonly defaultDimension: number;
    abstract open(): Promise<void>;
    abstract close(): Promise<void>;
    abstract ensureVectorTable(modelId: string): Promise<void>;
    abstract dropVectorTable(modelId: string): Promise<void>;
    abstract hasVectorTable(modelId: string): Promise<boolean>;
    abstract listVectorTables(): Promise<string[]>;
    abstract upsertVector(modelId: string, id: number, embedding: number[]): Promise<void>;
    abstract batchUpsertVectors(modelId: string, records: {
        id: number;
        embedding: number[];
    }[]): Promise<void>;
    abstract getVector(modelId: string, id: number): Promise<VectorRecord | null>;
    abstract deleteVector(modelId: string, id: number): Promise<void>;
    abstract batchDeleteVectors(modelId: string, ids: number[]): Promise<void>;
    abstract search(modelId: string, queryEmbedding: number[], options?: VectorSearchOptions): Promise<VectorSearchResult[]>;
    abstract countVectors(modelId: string): Promise<number>;
    abstract getVectorIds(modelId: string, options?: {
        limit?: number;
        afterId?: number;
    }): Promise<number[]>;
    /**
     * 将各种时间格式转换为 Unix 时间戳（秒）
     */
    protected toTimestamp(value: any): number;
    /**
     * 将 distance 转换为 score [0, 1]
     */
    protected distanceToScore(distance: number): number;
}