import { Observable } from "../../../infrastructure/observer/Observable";
import { BaseTheme } from "../types/theme/BaseTheme";
/**
 * Service interface for managing themes and their CSS custom properties in the application.
 * @template ThemeName Theme identifier type, defaults to never if not specified.
 * @template PropName CSS custom property name type, defaults to string if not specified.
 */
export interface IThemeService<ThemeName extends string = never, PropName extends string = string> {
    /**
     * Observable that emits the current active theme configuration.
     */
    readonly currentTheme: Observable<BaseTheme<ThemeName>>;
    /**
     * Provides access to CSS custom properties as var() references.
     * @returns A mapped object where each key is a CSS custom property name and value is its var() reference.
     */
    get var(): {
        [K in PropName]: `var(--${K})`;
    };
}