export { MUX_STREAM_ORIGIN, MUX_IMAGE_ORIGIN } from './mux-origins';
/**
 * Save-Data detection — the ONE source of truth for "is this a metered
 * connection". Consumed by the preload gate below and by `video.tsx`'s
 * default `preload` policy. SSR-safe (returns false on the server).
 */
export declare function saveDataEnabled(): boolean;
/**
 * Preconnect-only variant — fires the three video-bearing origin
 * preconnects (Supabase Storage + Mux stream + Mux image) without
 * setting up the IntersectionObserver subscription or the preload
 * `<link>` injection.
 *
 * Use this when the consumer can't attach a `ref` to the video
 * container (e.g. release detail page, which delegates the player
 * render to a sibling component). Calling the full `useVideoWarmup`
 * from there would subscribe to a never-mounted ref and ship dead
 * preload machinery in the bundle.
 *
 * For consumers that own the video container, use `useVideoWarmup`
 * (which composes this hook + the IO-gated preload step).
 *
 * Reads `supabaseStorageOrigin` from `ChatRuntime.endpoints` by
 * default — callers in hosts that mount `HubRuntimeProvider` (or
 * any equivalent provider that wires the field) get the origin
 * automatically. The explicit `supabaseStorageOrigin` argument
 * overrides the runtime value when set.
 *
 * The hub's `app/layout.tsx` also emits STATIC `<link rel="preconnect">`
 * tags for the same Mux origins (document-parse-time warmup; React
 * dedupes against these runtime calls via the matching
 * crossOrigin="anonymous"). A change to the origin list here must be
 * mirrored there.
 */
export declare function useVideoOriginPreconnect({ supabaseStorageOrigin, }?: {
    supabaseStorageOrigin?: string;
}): void;
interface UseVideoWarmupOptions {
    /**
     * Effective video URL the page renders. Pass null/undefined when
     * there's no video yet (the hook still preconnects). Only URLs on
     * `supabaseStorageOrigin` are preloaded — Mux HLS and YouTube are
     * no-ops on the preload side.
     */
    videoUrl?: string | null;
    /**
     * Supabase storage origin (e.g. `https://xyz.supabase.co`). When
     * omitted, falls back to `ChatRuntime.endpoints.supabaseStorageOrigin`
     * — hosts that mount `HubRuntimeProvider` (or any equivalent
     * provider) get the origin automatically. When neither is set, the
     * preload step is skipped (preconnect to Mux still fires).
     */
    supabaseStorageOrigin?: string;
    /**
     * IO root margin gate for the preload step. Default `'1000px'` —
     * about one viewport's worth of lookahead on desktop.
     */
    nearMargin?: string;
}
export interface UseVideoWarmupResult<T extends Element = HTMLDivElement> {
    ref: (node: T | null) => void;
    isNear: boolean;
}
export declare function useVideoWarmup<T extends Element = HTMLDivElement>({ videoUrl, supabaseStorageOrigin, nearMargin, }?: UseVideoWarmupOptions): UseVideoWarmupResult<T>;
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