/**
 * SQLiteMetricsCollector — SQLite-backed metrics persistence
 *
 * Drop-in replacement for the in-memory MetricsCollector.
 * Persists metric records to SQLite for survival across restarts.
 */
import Database from 'better-sqlite3';
import type { AggregatedMetrics, TimeWindow } from './metrics-types.js';
export interface SQLiteMetricsCollectorOptions {
    db: Database.Database;
}
export declare class SQLiteMetricsCollector {
    private readonly db;
    constructor(options: SQLiteMetricsCollectorOptions);
    private initSchema;
    recordSearch(query: string, resultCount: number): void;
    recordGapDetection(totalQuestions: number, coveredQuestions: number): void;
    recordDistribution(ruleId: string, targetCount: number, successCount: number, failureCount: number): void;
    recordConflict(produced: number, resolved: number, pending: number): void;
    aggregate(window?: TimeWindow): AggregatedMetrics;
    getRawRecords(): {
        search: {
            timestamp: Date;
            query: string;
            resultCount: number;
            hit: boolean;
        }[];
        gapDetection: {
            timestamp: Date;
            totalQuestions: number;
            coveredQuestions: number;
            uncoveredQuestions: number;
        }[];
        distribution: {
            timestamp: Date;
            ruleId: string;
            targetCount: number;
            successCount: number;
            failureCount: number;
        }[];
        conflict: {
            timestamp: Date;
            produced: number;
            resolved: number;
            pending: number;
        }[];
    };
    clear(): void;
}
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