import type { RunResult } from '../db-adapter/statement.js';
import { type SearchRankerModel } from './ranker-trainer.js';
export type SearchRankerSkippedReason = 'feature_disabled' | 'no_active_model' | 'feature_set_mismatch' | 'quality_gate_failed' | 'insufficient_result_count' | 'llm_reranking_requested';
export interface RankerRescoreAdapter {
    prepare(sql: string): {
        run(...params: unknown[]): RunResult;
        get(...params: unknown[]): unknown;
        all(...params: unknown[]): unknown[];
    };
}
export interface RankerScoredFields {
    ranker_score?: number;
    score_before_ranker?: number;
    final_score?: number;
}
export interface RescoreSearchResultsOptions<T> {
    query: string;
    results: T[];
    featureEnabled?: boolean;
    useReranking?: boolean;
}
export interface RescoreSearchResultsResult<T> {
    results: Array<T & RankerScoredFields>;
    model_id: string | null;
    skipped_reason?: SearchRankerSkippedReason;
}
export declare function loadActiveSearchRankerModel(adapter: RankerRescoreAdapter): SearchRankerModel | null;
export declare function isSearchRankerEnabled(adapter: RankerRescoreAdapter): boolean;
export declare function rescoreSearchResults<T extends Record<string, unknown>>(adapter: RankerRescoreAdapter, options: RescoreSearchResultsOptions<T>): RescoreSearchResultsResult<T>;
export declare function logisticScoreForRow(model: SearchRankerModel, row: Record<string, unknown>, query: string): number;
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