import { Subject } from 'rxjs';
import { Controller as BaseController } from 'sourcegraph/module/client/controller';
import { ExecuteCommandParams } from 'sourcegraph/module/client/providers/command';
import { MessageTransports } from 'sourcegraph/module/protocol/jsonrpc2/connection';
import { Notification } from '../app/notifications/notification';
import { Context } from '../context';
import { ConfiguredExtension } from '../extensions/extension';
import { ConfigurationCascade, ConfigurationSubject, Settings } from '../settings';
/**
 * Extends the {@link BaseController} class to add functionality that is useful to this package's consumers.
 */
export declare class Controller<S extends ConfigurationSubject, C extends Settings> extends BaseController<ConfiguredExtension, ConfigurationCascade<S, C>> {
    /**
     * Global notification messages that should be displayed to the user, from the following sources:
     *
     * - window/showMessage notifications from extensions
     * - Errors thrown or returned in command invocation
     */
    readonly notifications: Subject<Notification>;
    /**
     * Executes the command (registered in the CommandRegistry) specified in params. If an error is thrown, the
     * error is returned *and* emitted on the {@link Controller#notifications} observable.
     *
     * All callers should execute commands using this method instead of calling
     * {@link sourcegraph:CommandRegistry#executeCommand} directly (to ensure errors are
     * emitted as notifications).
     */
    executeCommand(params: ExecuteCommandParams): Promise<any>;
}
/**
 * React props or state containing the controller. There should be only a single controller for the whole
 * application.
 */
export interface ControllerProps<S extends ConfigurationSubject, C extends Settings> {
    /**
     * The controller, which is used to communicate with the extensions and manages extensions based on the
     * environment.
     */
    extensionsController: Controller<S, C>;
}
declare global {
    interface Window {
        sx: any;
        sxenv: any;
    }
}
/**
 * Creates the controller, which handles all communication between the React app and Sourcegraph extensions.
 *
 * There should only be a single controller for the entire application. The controller's environment represents all
 * of the application state that the controller needs to know.
 *
 * It receives state updates via calls to the setEnvironment method from React components. It provides results to
 * React components via its registries and the showMessages, etc., observables.
 */
export declare function createController<S extends ConfigurationSubject, C extends Settings>(context: Context<S, C>, createMessageTransports: (extension: ConfiguredExtension) => Promise<MessageTransports>): Controller<S, C>;