import { EventEmitter } from 'events';
import type { TaskReporterCompleteTaskStatus, TaskReporterTaskStatus } from './types/TaskReporterTaskStatus.js';
export interface TaskReporterTaskResult {
    status: TaskReporterCompleteTaskStatus;
    /** Main message for the task. */
    message?: string;
    errors?: string[];
    warnings?: string[];
    /** Extra details, shown with verbose or debug logging. */
    details?: string;
    /** Even more information (beyond `details`), only shown with debug logging. */
    extended?: string;
    /** Log this task's completion even if `TaskReporterOptions.showCompleted` is false. */
    forceShow?: boolean;
}
/** Mapping from custom event name to args */
interface TaskEvents {
    start: [];
    complete: [TaskReporterTaskResult];
}
export interface CompletedTaskReporterTask {
    name: string;
    /** Task duration in milliseconds, or undefined if it was canceled or never started */
    duration: number | undefined;
    endedAt: Date;
    result: TaskReporterTaskResult;
}
/**
 * Task recorded and reported by a TaskReporter.
 * Use `reporter.addTask()` to create a new task.
 */
export declare class TaskReporterTask extends EventEmitter {
    readonly name: string;
    private _result?;
    private _timeStarted?;
    private _timeEnded?;
    private _endedAt?;
    /**
     * For TaskReporter use only. Use `reporter.addTask()` to create a new task.
     * @internal
     */
    constructor(name: string);
    /**
     * Current status:
     * - `"pending"` if not started yet
     * - `"running"` if started but not completed
     * - result status if completed
     */
    get status(): TaskReporterTaskStatus;
    /** Get the task duration in ms, or undefined if not finished yet */
    get duration(): number | undefined;
    /** End date, only if completed */
    get endedAt(): Date | undefined;
    /** Result, only if completed */
    get result(): Readonly<TaskReporterTaskResult> | undefined;
    /** Start the task and emit the `'start'` event to the TaskReporter. */
    start(): void;
    /**
     * Complete the task. No-op if called multiple times.
     * @param result - Task result. If `result.status` is unset, defaults to `'complete'` (success).
     */
    complete(result?: Partial<TaskReporterTaskResult>): void;
    toCompletedJson(): CompletedTaskReporterTask;
    /** Used by TaskReporter to listen for events */
    on<K extends keyof TaskEvents>(event: K, listener: (...args: TaskEvents[K]) => void): this;
    /** For internal use only */
    private _emit;
}
export {};
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