import { type FullConfig, type FullResult, type Reporter, type Suite, type TestCase, type TestResult, type TestStep } from '@playwright/test/reporter';
import { type Options } from '../types/index.js';
export declare class PerformanceReporter implements Reporter {
    private readonly options;
    /**
     * Maps unique playwright test ids to the computed name
     */
    private readonly idToNameMapping;
    private readonly metricsEngine;
    /**
     * Writer to stream json chunks
     */
    private readonly jsonChunkWriter;
    /**
     * Reference to the unsubscribe function for a hook and test id
     */
    private readonly samplingRunner;
    constructor(options: Options);
    onBegin(config: FullConfig, suite: Suite): void;
    onEnd(result: FullResult): void;
    onTestBegin(test: TestCase, result: TestResult): Promise<void>;
    onTestEnd(test: TestCase, result: TestResult): Promise<void>;
    onStepBegin(test: TestCase, result: TestResult, step: TestStep): Promise<void>;
    onStepEnd(test: TestCase, result: TestResult, step: TestStep): Promise<void>;
    /**
     * Add new `TestPerformance` with identifier
     *
     * @param caseId identifier for case
     * @param stepId identifier for step
     * @param name human friendly identifier
     */
    private createTestPerformance;
    /**
     * Destroys sampling for metrics
     *
     * @param caseId identifier for case
     * @param stepId identifier for step
     * @param hook playwright hook
     */
    private destroySamplingRunner;
    /**
     * Execute metrics gathering for existing metrics and custom metrics
     *
     * @param results result accumulator
     * @param caseId identifier for case
     * @param stepId identifier for step
     * @param hook playwright hook
     * @param hookOrder playwright hook order
     * @param browser which settings and metrics to use
     */
    private executeMetrics;
    /**
     * Setup sampling for existing metrics and custom metrics
     *
     * @param results result accumulator
     * @param caseId identifier for case
     * @param stepId identifier for step
     * @param hook playwright hook
     * @param browser which settings and metrics to use
     */
    private executeSamplingMetrics;
}