import * as i0 from '@angular/core';
import { Signal } from '@angular/core';

/** Public state of the loading bar. */
type WrLoadingState = 'idle' | 'running' | 'completing';

/**
 * @license
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/thekhegay/ngwr/blob/main/LICENSE
 */

/**
 * Singleton state machine for a top-of-page progress indicator. Driven
 * by router events out of the box, plus a manual `start()` / `complete()`
 * API for HTTP-interceptor-style usage.
 *
 * Pair with `<wr-loading-bar>` to render the bar at the top of your shell.
 *
 * @example
 * ```ts
 * // From an HttpInterceptor:
 * const bar = inject(WrLoadingBar);
 * bar.start();
 * return next(req).pipe(finalize(() => bar.complete()));
 * ```
 *
 * @see https://ngwr.dev/services/loading-bar
 */
declare class WrLoadingBar {
    private readonly router;
    /** Live count of pending "tasks" (manual + router). */
    private readonly count;
    /** Tween value `[0, 1]` — the bar's actual width. */
    private readonly _progress;
    readonly progress: Signal<number>;
    readonly state: Signal<WrLoadingState>;
    private timer;
    constructor();
    /** Reserve a slot. The bar starts trickling as long as `count > 0`. */
    start(): void;
    /** Release a slot. When the last one closes, the bar fast-forwards to 100% then resets. */
    complete(): void;
    /** Cancel without animating the bar to 100%. Resets immediately. */
    reset(): void;
    private beginTrickle;
    private stopTrickle;
    private finish;
    static ɵfac: i0.ɵɵFactoryDeclaration<WrLoadingBar, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<WrLoadingBar>;
}

/**
 * Thin progress bar fixed to the top of the viewport.
 *
 * Drop one at the root of your shell. Reads the singleton {@link WrLoadingBar}
 * — every router navigation drives it automatically; HTTP interceptors
 * can call `start()` / `complete()` to add their own slots.
 *
 * @example
 * ```html
 * <wr-loading-bar />               <!-- top, primary color -->
 * <wr-loading-bar color="#9b51e0" height="3px" />
 * ```
 */
declare class WrLoadingBarComponent {
    /** Bar colour. Defaults to the primary brand colour. */
    readonly color: i0.InputSignal<string>;
    /** Bar height. */
    readonly height: i0.InputSignal<string>;
    protected readonly bar: WrLoadingBar;
    protected readonly active: i0.Signal<boolean>;
    static ɵfac: i0.ɵɵFactoryDeclaration<WrLoadingBarComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<WrLoadingBarComponent, "wr-loading-bar", never, { "color": { "alias": "color"; "required": false; "isSignal": true; }; "height": { "alias": "height"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}

export { WrLoadingBar, WrLoadingBarComponent };
export type { WrLoadingState };