import { Observable } from 'rxjs';
import { Theme } from './theme.model';
import * as i0 from "@angular/core";
export declare class ThemeService {
    private $themes;
    private $currentTheme;
    constructor();
    get themes(): Theme[];
    get themesObservable(): Observable<Theme[]>;
    get currentTheme(): Theme;
    set currentTheme(t: Theme);
    get themeName(): string;
    get currentThemeObservable(): Observable<Theme>;
    get darkness(): boolean;
    /**
     * check if there is saved theme, then looks it up at theme repository
     */
    getDefaultTheme(): Theme;
    /**
     * Find theme by specified theme
     * Always returns 'light' theme if no results
     */
    findTheme(name: string): Theme;
    /**
     * returns current theme index
     */
    getCurrentThemeIndex(): number;
    /**
     * Switch to next theme, find current index
     * and if (current + 1) is out of index expression just go to themes[0]
     */
    nextTheme(): void;
    /**
     * Sets specified specified theme by name
     *
     * @param name is required
     */
    setTheme(name: string): void;
    /**
     * Gets value of specified theme property
     *
     * @param propName is required
     */
    getProperty(propName: string): string;
    /**
     * Registers new theme in service memory
     * @param theme contains new Theme references
     * cannot be named as `light`, `dark` or any default themes
     */
    registerTheme(theme: Theme): void;
    updateTheme(t: Theme): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ThemeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ThemeService>;
}