import type { Profile } from '@remixproject/plugin-utils';
import { Plugin, PluginOptions } from './abstract';
export declare class Engine {
    private plugins;
    private events;
    private listeners;
    private eventMemory;
    private manager;
    onRegistration?(plugin: Plugin): void;
    /** Update the options of the plugin when being registered */
    setPluginOption?(profile: Profile): PluginOptions;
    /**
     * Broadcast an event to the plugin listening
     * @param emitter Plugin name that emits the event
     * @param event The name of the event
     * @param payload The content of the event
     */
    private broadcast;
    /**
     * Start listening on an event from another plugin
     * @param listener The name of the plugin that listen on the event
     * @param emitter The name of the plugin that emit the event
     * @param event The name of the event
     * @param cb Callback function to trigger when the event is trigger
     */
    private addListener;
    /**
     * Remove an event from the list of a listener's events
     * @param listener The name of the plugin that was listening on the event
     * @param emitter The name of the plugin that emitted the event
     * @param event The name of the event
     */
    private removeListener;
    /**
     * Create a listener that listen only once on an event
     * @param listener The name of the plugin that listen on the event
     * @param emitter The name of the plugin that emitted the event
     * @param event The name of the event
     * @param cb Callback function to trigger when event is triggered
     */
    private listenOnce;
    /**
     * Call a method of a plugin from another
     * @param caller The name of the plugin that calls the method
     * @param path The path of the plugin that manages the method
     * @param method The name of the method
     * @param payload The argument to pass to the method
     */
    private callMethod;
    /**
     * Create an object to easily access any registered plugin
     * @param name Name of the caller plugin
     * @note This method creates a snapshot at the time of activation
     */
    private createApp;
    /**
     * Activate a plugin by making its method and event available
     * @param name The name of the plugin
     * @note This method is trigger by the plugin manager when a plugin has been activated
     */
    private activatePlugin;
    /**
     * Deactivate a plugin by removing all its event listeners and making it inaccessible
     * @param name The name of the plugin
     * @note This method is trigger by the plugin manager when a plugin has been deactivated
     */
    private deactivatePlugin;
    /**
     * Update error message when trying to call a method when not activated
     * @param plugin The deactivated plugin to update the methods from
     */
    private updateErrorHandler;
    /**
     * Register a plugin to the engine and update the manager
     * @param plugin The plugin
     */
    register(plugins: Plugin | Plugin[]): string | string[];
    /** Register the manager */
    private registerManager;
    /** Remove plugin(s) from engine */
    remove(names: string | string[]): Promise<void> | Promise<void[]>;
    /**
     * Check is a name is already registered
     * @param name Name of the plugin
     */
    isRegistered(name: string): boolean;
}