import { ComponentStyles } from "@microsoft/fast-jss-manager";
import { JSSManagerSubscriber, JSSStyleSheet } from "./jss-manager";
export declare type SheetTracker = [JSSStyleSheet, number];
export declare type DesignSystemRegistry = WeakMap<object, SheetTracker>;
export declare type SheetRegistry = WeakMap<ComponentStyles<unknown, unknown>, DesignSystemRegistry>;
export interface JSSSheetOptions {
    meta?: string;
    index?: number;
    generateClassName?: (sheet: unknown, rules: unknown) => string;
}
/**
 * A class for managing instance of stylesheets. The SheetManager
 * tracks and associates compiled stylesheets with their style/design-system inputs,
 * as well as tracking number of times a style/design-system combination has been used.
 * Tracking this allows us to memoize compiled stylesheets and only compile a new sheet
 * when one does not already exist.
 */
export default class SheetManager {
    jss: any;
    private registry;
    private subscribers;
    /**
     * Creates a new JSS stylesheet from a stylesheet and design-system.
     * If a JSS style sheet has been created with this stylesheet and design system already,
     * then simply track that another instance has been added
     */
    add(styles: ComponentStyles<unknown, unknown>, designSystem: any, options?: JSSSheetOptions): void;
    /**
     * Return the compiled jss stylesheet associated with a given style object and design system
     */
    get(styles: ComponentStyles<unknown, unknown>, designSystem: any): JSSStyleSheet | void;
    /**
     * Removes a reference for a stylesheet and designSystem and adds a new reference. Useful
     * when the design system changes and the stylesheet should be associated with a new
     * design system
     */
    update(styles: ComponentStyles<unknown, unknown>, previousDesignSystem: any, nextDesignSystem: any): void;
    /**
     * Reduces the internal count for a stylesheet and designsystem. If the count becomes zero,
     * the sheet will be detached
     */
    remove(styles: ComponentStyles<unknown, unknown>, designSystem: any): void;
    /**
     * Returns the number of components using a stylesheet with a designSystem
     */
    count(styles: ComponentStyles<unknown, unknown>, designSystem: object): number;
    /**
     * Removes all entries
     */
    clean(): void;
    /**
     * Retrieve the sheet tracker tracking the styles and design system
     */
    private getTracker;
    /**
     * Creates a JSS StyleSheet and attaches it to the DOM
     */
    private createStyleSheet;
    private notify;
    /**
     * Subscribe to add, update, and remove events taken by the sheet manager.
     * @param subscriber The subscription function to invoke
     */
    subscribe(subscriber: JSSManagerSubscriber): () => void;
    unsubscribe(subscriber: JSSManagerSubscriber): void;
}