import { Envelope } from '@cucumber/messages';
import { ArrayValues, Promisable } from 'type-fest';
import { IRunEnvironment } from '../environment';
import { ILogger } from '../environment';
import { IFilterablePickle } from '../filter';
import { IResolvedPaths } from '../paths';
import { coordinatorTransformKeys, coordinatorVoidKeys } from './events';
export type Operation = 'loadSources' | 'loadSupport' | 'runCucumber';
export type CoordinatorPluginEnvironment = Required<Pick<IRunEnvironment, 'cwd' | 'stderr' | 'env'>>;
export type CoordinatorPluginVoidEventKey = ArrayValues<typeof coordinatorVoidKeys>;
export type CoordinatorPluginTransformEventKey = ArrayValues<typeof coordinatorTransformKeys>;
export type CoordinatorPluginEventKey = CoordinatorPluginVoidEventKey | CoordinatorPluginTransformEventKey;
export type CoordinatorPluginEventValues = {
    message: Readonly<Envelope>;
    'paths:resolve': Readonly<IResolvedPaths>;
    'pickles:filter': Readonly<Array<IFilterablePickle>>;
    'pickles:order': Readonly<Array<IFilterablePickle>>;
};
export type CoordinatorPluginEventHandler<K extends CoordinatorPluginEventKey> = (value: CoordinatorPluginEventValues[K]) => K extends CoordinatorPluginTransformEventKey ? Promisable<CoordinatorPluginEventValues[K]> : void;
export interface CoordinatorPluginContext<OptionsType> {
    operation: Operation;
    on: <EventKey extends CoordinatorPluginEventKey>(event: EventKey, handler: CoordinatorPluginEventHandler<EventKey>) => void;
    options: OptionsType;
    logger: ILogger;
    environment: CoordinatorPluginEnvironment;
}
export type CoordinatorPluginFunction<OptionsType> = (context: CoordinatorPluginContext<OptionsType>) => Promisable<PluginCleanup | void>;
export type PluginCleanup = () => Promisable<void>;
/**
 * A plugin to implement Cucumber built-in functionality.
 *
 * Uses the same events and mechanisms as user-authored plugins, but is free to require configuration and context from
 * inside of Cucumber as its `options`, whereas user-authored plugins will be limited to `pluginOptions` from the
 * project configuration.
 */
export interface InternalPlugin<OptionsType = any> {
    type: 'plugin';
    coordinator: CoordinatorPluginFunction<OptionsType>;
}
export interface FormatterPluginContext<OptionsType> {
    on: (key: 'message', handler: (value: Envelope) => void) => void;
    options: OptionsType;
    logger: ILogger;
    write: (buffer: string | Uint8Array) => void;
    directory?: string;
}
export type FormatterPluginFunction<OptionsType> = (context: FormatterPluginContext<OptionsType>) => Promisable<PluginCleanup | void>;
export interface FormatterPlugin<OptionsType = any> {
    type: 'formatter';
    formatter: FormatterPluginFunction<OptionsType>;
    optionsKey?: string;
}