import { TrackedError } from './TrackedError';
import { TryCatchFinallyContext, TryCatchFinallyHook } from './wrapTryCatchFinallyPromisable';
export type OperationStatsContext<TContext extends TryCatchFinallyContext = TryCatchFinallyContext> = TContext & {
    tags: string[];
    sharedContext: {
        tags: string[];
    };
    decoratorArgs?: {
        shouldStats?: (args: OperationStatsEventArgs) => boolean | void;
    };
};
export declare abstract class OperationStats<TContext extends OperationStatsContext = OperationStatsContext> implements TryCatchFinallyHook<TContext> {
    static getTryCatchFinallyHook(_ctx: OperationStatsContext): TryCatchFinallyHook<OperationStatsContext>;
    abstract stats(args: StatsArgs): void;
    getMetricName(ctx: OperationStatsContext): string | undefined;
    onTry(ctx: OperationStatsContext): () => void;
    mergeTags(...tagSets: (StatsTags | undefined)[]): string[];
    mergeTags(distinct: boolean, ...tagSets: StatsTags[]): string[];
    tagsMapToArray(tags: StatsTagsMap): string[];
    tagsArrayToMap(tags: string[]): StatsTagsMap;
    statsOperationEvent(args: OperationStatsEventArgs): void;
    onCatch(ctx: OperationStatsContext): void;
    onFinally(ctx: OperationStatsContext): () => void;
    getHistogramMetric(ctx: OperationStatsContext): string | undefined;
    extractTagsFromError(error: TrackedError, ctx: OperationStatsContext): string[];
    getErrorOperationNameTag(error: TrackedError, ctx: OperationStatsContext): string | undefined;
    getOperationNameTag(ctx: OperationStatsContext): string | undefined;
}
export type StatsMethod = 'incr' | 'histogram' | 'set';
export type StatsArgs = {
    method?: StatsMethod;
    metric: string;
    value?: number;
    tags?: StatsTags;
};
export type StatsTagsMap = Record<string, string | number | boolean | undefined>;
export type StatsTags = string[] | StatsTagsMap;
export type OperationStatsEvent = OperationStatsContext['stage'] | 'duration';
export interface OperationStatsEventArgs {
    event: OperationStatsEvent;
    context: OperationStatsContext;
    stats: StatsArgs;
    shouldStats: boolean;
}