import type { AutomationClient } from "@mochabug/adapt-core";
import type { CapWidgetI18n } from "./types.js";
/**
 * `<adapt-cap>` custom element for Cap.js proof-of-work challenges.
 *
 * Renders a Cap.js widget that handles challenge creation, solving, and redemption.
 * The widget is styled through CSS custom properties. Avoid styling Cap.js
 * internals directly; this package only touches Cap's attribution node so
 * Adapt embeds do not show Cap branding.
 *
 * The widget initializes when both `automation-id` (attribute) and `client` (JS property)
 * are set. It auto-destroys after a successful solve.
 *
 * @example
 * ```html
 * <adapt-cap automation-id="auto-123" dark-mode></adapt-cap>
 *
 * <script type="module">
 *   import '@mochabug/adapt-web/elements';
 *   import { createConnectClient } from '@mochabug/adapt-core/connect';
 *
 *   const el = document.querySelector('adapt-cap');
 *   el.client = createConnectClient({ id: 'auto-123' });
 *
 *   el.addEventListener('adapt-cap-solve', (e) => {
 *     console.log('Token:', e.detail.token);
 *   });
 * </script>
 * ```
 *
 * @fires adapt-cap-solve - Dispatched when the challenge is solved. `detail: { token: string, expires: Date }`
 * @fires adapt-cap-error - Dispatched on error. `detail: { error: Error }`
 */
declare const BaseElement: {
    new (): HTMLElement;
    prototype: HTMLElement;
};
export declare class AdaptCapElement extends BaseElement {
    constructor();
    static get observedAttributes(): readonly string[];
    private _widget;
    private _client;
    /**
     * Custom label overrides for the Cap.js widget.
     * Must be set before `client` — changing after init has no effect.
     */
    i18n: CapWidgetI18n | undefined;
    /**
     * Called when the challenge is solved (alternative to the `adapt-cap-solve` event).
     *
     * @param token - Challenge token to pass to `startSession` / `run`
     * @param expires - When the token expires
     */
    onSolveCallback: ((token: string, expires: Date) => void) | undefined;
    /**
     * Called when solving fails (alternative to the `adapt-cap-error` event).
     */
    onErrorCallback: ((error: Error) => void) | undefined;
    /**
     * The automation client used for challenge API calls.
     * Created via `createConnectClient({ id })` from `@mochabug/adapt-core/connect`.
     *
     * Setting this property (re)initializes the widget when `automation-id` is also present.
     */
    get client(): AutomationClient | undefined;
    set client(v: AutomationClient | undefined);
    /**
     * Reflects the `automation-id` attribute. Changing this recreates the widget.
     */
    get automationId(): string | null;
    set automationId(v: string | null);
    /**
     * Reflects the `dark-mode` attribute. Can be toggled at runtime.
     */
    get darkMode(): boolean;
    set darkMode(v: boolean);
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void;
    private _tryInit;
    private _destroyWidget;
}
export {};