import { OnModuleInit, OnModuleDestroy } from '@nestjs/common';
import { IMetricsPluginOptions, IMetricsJson } from '../../../shared/types';
import { IMetricsService } from '../ports/metrics-service.port';
export declare class MetricsService implements IMetricsService, OnModuleInit, OnModuleDestroy {
    private readonly config;
    private readonly registry;
    /** True when the registry is created (and thus fully owned) by this service. */
    private readonly ownRegistry;
    private readonly counters;
    private readonly histograms;
    private readonly gauges;
    private readonly prefix;
    private readonly defaultLabels;
    private readonly latencyBuckets;
    private readonly enabled;
    private defaultMetricsInterval?;
    constructor(config: IMetricsPluginOptions);
    onModuleInit(): void;
    onModuleDestroy(): void;
    private registerStandardMetrics;
    /**
     * Look up a metric by the name the caller emits. Feature packages hardcode
     * canonical `redisx_*` names; when this registry uses a custom prefix the
     * series is registered under that prefix instead — resolve the canonical
     * name against it rather than silently no-oping the emit.
     */
    private resolveMetric;
    incrementCounter(name: string, labels?: Record<string, string>, value?: number): void;
    observeHistogram(name: string, value: number, labels?: Record<string, string>): void;
    startTimer(name: string, labels?: Record<string, string>): () => number;
    setGauge(name: string, value: number, labels?: Record<string, string>): void;
    incrementGauge(name: string, labels?: Record<string, string>, value?: number): void;
    decrementGauge(name: string, labels?: Record<string, string>, value?: number): void;
    getMetrics(): Promise<string>;
    getMetricsJson(): Promise<IMetricsJson[]>;
    registerCounter(name: string, help: string, labelNames?: string[]): void;
    registerHistogram(name: string, help: string, labelNames?: string[], buckets?: number[]): void;
    registerGauge(name: string, help: string, labelNames?: string[]): void;
}
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