/**
 * Sliding-window analytics rollups.
 *
 * Maintains O(1) counters for the dashboard:
 *  - throughput by level over 60 one-second buckets (last minute)
 *  - errors-by-source over the last 5 minutes
 *  - latency histogram from HTTP-level logs over the last 5 minutes
 *
 * All buckets evict by wall-clock time. No background timers — eviction
 * happens lazily on every update/read, so the module is self-cleaning
 * without leaking intervals.
 */
import { LogLevelName } from '../constants';
export interface RollupSnapshot {
    generatedAt: number;
    throughput: {
        windowSeconds: number;
        series: Array<{
            t: number;
            counts: Partial<Record<LogLevelName, number>>;
        }>;
        totalLastMinute: number;
        totalLastMinuteByLevel: Partial<Record<LogLevelName, number>>;
    };
    latency: {
        windowSeconds: number;
        samples: number;
        p50: number | null;
        p95: number | null;
        p99: number | null;
    };
    errors: {
        windowSeconds: number;
        total: number;
        topSources: Array<{
            source: string;
            count: number;
        }>;
    };
}
export interface IngestInput {
    level: LogLevelName;
    timestamp?: number;
    metadata?: Record<string, any> | null;
    message?: string;
    /** Logger-wide default for source attribution (e.g. consolePrefix). */
    defaultSource?: string;
}
export declare class Rollups {
    private throughput;
    private latency;
    private errors;
    ingest(input: IngestInput): void;
    snapshot(): RollupSnapshot;
    private evict;
    private recordThroughput;
    private recordError;
    private recordLatencyFromHttp;
}