import { type DB } from '../db/client.js';
export interface HybridSearchOptions {
    /**
     * D1 binding OR a pre-built Drizzle client (any schema). v0.7+:
     * normalized internally.
     */
    db: D1Database | DB;
    contentTable: string;
    ftsTable?: string;
    searchColumns: string[];
    filters?: Record<string, unknown>;
    rrfK?: number;
    bm25Weight?: number;
    keywordWeight?: number;
    dedupKey?: (row: Record<string, unknown>) => string;
}
export interface SearchOptions {
    limit?: number;
    filters?: Record<string, unknown>;
}
export interface ScoredRow extends Record<string, unknown> {
    score: number;
    _kw: number;
    _bm: number;
}
export declare class HybridSearch {
    readonly db: DB;
    readonly contentTable: string;
    readonly ftsTable: string;
    readonly searchColumns: string[];
    readonly filters: Record<string, unknown>;
    readonly rrfK: number;
    readonly bm25Weight: number;
    readonly keywordWeight: number;
    readonly dedupKey: (row: Record<string, unknown>) => string;
    constructor({ db, contentTable, ftsTable, searchColumns, filters, rrfK, bm25Weight, keywordWeight, dedupKey, }: HybridSearchOptions);
    search<T extends Record<string, unknown> = Record<string, unknown>>(query: string, { limit, filters }?: SearchOptions): Promise<(T & ScoredRow)[]>;
    bm25<T = Record<string, unknown>>(query: string, limit: number, filters?: Record<string, unknown>): Promise<T[]>;
    like<T = Record<string, unknown>>(query: string, limit: number, filters?: Record<string, unknown>): Promise<T[]>;
    private buildFilterFragment;
    rrf<T extends Record<string, unknown>>(keyword: T[], bm25: T[], limit: number): (T & ScoredRow)[];
}
export interface SearchSchemaArgs {
    contentTable: string;
    ftsTable?: string;
    ftsColumns: string[];
    tokenize?: string;
}
export declare function buildSearchSchema({ contentTable, ftsTable, ftsColumns, tokenize }: SearchSchemaArgs): string[];
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