import { Prettify } from "../../docs/docs";
export interface EventData {
    name: string;
    handlersNumber: number;
    handlers: {
        normal: NormalHandlers;
        before: EventHandler | undefined;
        after: EventHandler | undefined;
    };
}
export interface NormalHandlers {
    index: number;
    handlers: Map<number, EventHandler>;
    onceHandlers: Map<number, EventHandler>;
}
/**
 * Options for adding an event handler to an EventEmitter.
 */
export interface AddHandlerOptions {
    /**
     * If true, the handler will be invoked only once and then automatically removed.
     * @default false
     */
    once?: boolean;
    /**
    * The type of the event handler.
    *
    * - `"normal"` (default):
    *   Regular handlers that are called in the order they were added each time the event is emitted.
    *
    * - `"beforeAll"`:
    *   A unique handler that is called **before all** normal handlers every time the event is emitted.
    *   Only one `beforeAll` handler can be assigned per event; assigning another will overwrite the previous one.
    *
    * - `"afterAll"`:
    *   A unique handler that is called **after all** normal handlers every time the event is emitted.
    *   Only one `afterAll` handler can be assigned per event; assigning another will overwrite the previous one.
    *
    * These special handlers let you run setup or teardown logic around the normal event handlers.
    */
    type?: 'beforeAll' | 'afterAll' | 'normal';
}
export type EventHandler = (...args: any[]) => any | Promise<any>;
export type GlobalEventHandler<TMap> = (eventName: EventName<TMap>, ...args: any) => any | Promise<any>;
export type EventName<TMap> = Extract<keyof TMap, string>;
export type IsNever<T> = [T] extends [never] ? true : false;
export type ProcessorEventsConfigs = {
    /**
     * The name of the emitted event.
     */
    emittedBy: string;
    /**
     * The internal data of the event.
     */
    data: EventData;
    /**
     * Whether the events are global or not.
     * @default false
     */
    isGlobal?: boolean;
};
export type ProcessorMetaData = Prettify<{
    triggeredBy: ProcessorEventsConfigs['emittedBy'];
} & Pick<ProcessorEventsConfigs, 'isGlobal'>>;