import { EventEmitter } from './api';
/**
 * Describes the metadata of a pilet available in its API.
 */
export interface PiletMetadata {
    /**
     * The name of the pilet, i.e., the package id.
     */
    name: string;
    /**
     * The version of the pilet. Should be semantically versioned.
     */
    version: string;
    /**
     * Provides the version of the specification for this pilet.
     */
    spec: string;
    /**
     * Provides some custom metadata for the pilet.
     */
    custom?: any;
    /**
     * Optionally indicates the global require reference, if any.
     */
    requireRef?: string;
    /**
     * Additional shared dependencies from the pilet.
     */
    dependencies: Record<string, string>;
    /**
     * Provides some configuration to be used in the pilet.
     */
    config: Record<string, any>;
    /**
     * The URL of the main script of the pilet.
     */
    link: string;
    /**
     * The base path to the pilet. Can be used to make resource requests
     * and override the public path.
     */
    basePath: string;
}
/**
 * Defines the API accessible from pilets.
 */
export interface PiletApi extends EventEmitter {
    /**
     * Gets the metadata of the current pilet.
     */
    meta: PiletMetadata;
}
/**
 * The creator function for the pilet API.
 */
export interface PiletApiCreator {
    /**
     * Creates an API for the given raw pilet.
     * @param target The raw (meta) content of the pilet.
     * @returns The API object to be used with the pilet.
     */
    (target: PiletMetadata): PiletApi;
}
/**
 * The pilet app, i.e., the functional exports.
 */
export interface SinglePiletApp {
    /**
     * Integrates the evaluated pilet into the application.
     * @param api The API to access the application.
     */
    setup(api: PiletApi): void | Promise<void>;
    /**
     * Optional function for cleanup.
     * @param api The API to access the application.
     */
    teardown?(api: PiletApi): void;
    /**
     * The referenced stylesheets to load / integrate.
     * This would only be used by v3 pilets.
     */
    styles?: Array<string>;
    /**
     * The referenced WebAssembly binaries to load / integrate.
     * This would only be used by v3 pilets.
     */
    assemblies?: Array<string>;
}
/**
 * The pilet app, i.e., the functional exports.
 */
export interface MultiPiletApp {
    /**
     * Integrates the evaluated pilet into the application.
     * @param api The API to access the application.
     */
    setup(apiFactory: PiletApiCreator): void | Promise<void>;
}
/**
 * The application's entry point exported by a pilet.
 */
export type PiletApp = SinglePiletApp | MultiPiletApp;
/**
 * Defines the exports of a pilet.
 */
export interface PiletExports {
    exports: PiletApp | undefined;
}
/**
 * An evaluated single pilet.
 */
export type SinglePilet = SinglePiletApp & PiletMetadata;
/**
 * An evaluated multi pilet.
 */
export type MultiPilet = MultiPiletApp & PiletMetadata;
/**
 * An evaluated pilet, i.e., a full pilet: functionality and metadata.
 */
export type Pilet = SinglePilet | MultiPilet;