import { Pilet, PiletApi, PiletApiCreator, PiletApp, PiletMetadata } from './runtime';
import { PiletEntries, PiletEntry } from './service';
/**
 * The interface describing a function capable of fetching pilets.
 */
export interface PiletRequester {
    /**
     * Gets the raw pilets (e.g., from a server) asynchronously.
     */
    (): Promise<PiletEntries>;
}
/**
 * The record containing all available dependencies.
 */
export interface AvailableDependencies {
    [name: string]: any;
}
/**
 * The callback to be used when pilets have been loaded.
 */
export interface PiletsLoaded {
    (error: Error | undefined, pilets: Array<Pilet>): void;
}
/**
 * The callback to be used when pilets are loading.
 */
export interface PiletsLoading {
    (error: Error | undefined, pilets: Array<Pilet>, loaded: boolean): void;
}
/**
 * The strategy for how pilets are loaded at runtime.
 */
export interface PiletLoadingStrategy {
    (options: LoadPiletsOptions, pilets: PiletsLoaded): PromiseLike<void>;
}
/**
 * The callback to be used to load a single pilet.
 */
export interface PiletLoader {
    (entry: PiletEntry): Promise<Pilet>;
}
/**
 * Defines the spec identifiers for custom loading.
 */
export type CustomSpecLoaders = Record<string, PiletLoader>;
/**
 * A set of pipeline hooks used by the Piral loading orchestrator.
 */
export interface PiletLifecycleHooks {
    /**
     * Hook fired before a pilet is loaded.
     */
    loadPilet?(pilet: PiletMetadata): void;
    /**
     * Hook fired before a pilet is being set up.
     */
    setupPilet?(pilet: Pilet): void;
    /**
     * Hook fired before a pilet is being cleaned up.
     */
    cleanupPilet?(pilet: Pilet): void;
}
/**
 * The options for loading pilets.
 */
export interface LoadPiletsOptions {
    /**
     * The callback function for creating an API object.
     * The API object is passed on to a specific pilet.
     */
    createApi: PiletApiCreator;
    /**
     * The callback for fetching the dynamic pilets.
     */
    fetchPilets: PiletRequester;
    /**
     * Optionally, some already existing evaluated pilets, e.g.,
     * helpful when debugging or in SSR scenarios.
     */
    pilets?: Array<Pilet>;
    /**
     * Optionally, configures the default loader.
     */
    config?: DefaultLoaderConfig;
    /**
     * Optionally, defines the default way how to load a pilet.
     */
    loadPilet?: PiletLoader;
    /**
     * Optionally, defines loaders for custom specifications.
     */
    loaders?: CustomSpecLoaders;
    /**
     * Optionally, defines a set of loading hooks to be used.
     */
    hooks?: PiletLifecycleHooks;
    /**
     * Gets the map of globally available dependencies with their names
     * as keys and their evaluated pilet content as value.
     */
    dependencies?: AvailableDependencies;
    /**
     * Optionally, defines the loading strategy to use.
     */
    strategy?: PiletLoadingStrategy;
}
/**
 * Shape to be used by a Pilet API extension that requires other
 * APIs or some metadata to work properly.
 */
export interface PiletApiExtender<T> {
    /**
     * Extends the base API of a module with new functionality.
     * @param api The API created by the base layer.
     * @param target The target the API is created for.
     * @returns The extended API.
     */
    (api: PiletApi, target: PiletMetadata): T;
}
export interface PiletRunner {
    (app: PiletApp, apiFactory: PiletApiCreator, hooks: PiletLifecycleHooks): Promise<void>;
}
/**
 * Additional configuration options for the default loader.
 */
export interface DefaultLoaderConfig {
    /**
     * Sets the cross-origin attribute of potential script tags.
     * For pilets v1 this may be useful. Otherwise, only pilets that
     * have an integrity defined will be set to "anonymous".
     */
    crossOrigin?: string;
    /**
     * Sets the override function for attaching a stylesheet.
     * This option will only affect `v3` pilets.
     * @param pilet The pilet containing the style sheet reference.
     * @param url The style sheet reference URL.
     */
    attachStyles?(pilet: Pilet, url: string): void;
}