import { ComputedRef, Ref } from 'vue';
import { BaseSurfaceMode, BaseSurfaceProps } from './types';
export declare const SURFACE_MOTION_DURATION_MS = 299;
export declare const REFRACTION_PARAM_BLEND_DURATION_MS = 182;
export declare const REFRACTION_MASK_RELEASE_DELAY_AFTER_FALLBACK_MS = 60;
export declare const REFRACTION_RECOVERY_DURATION_FACTOR = 0.35;
export declare const REFRACTION_MASK_RELEASE_DURATION_MS: number;
export declare const REFRACTION_MASK_PEAK_OPACITY = 0.95;
/**
 * Opacity of the dedicated motion cover while a refraction surface moves.
 * Deliberately translucent: the sampling-stale filter layers fade themselves
 * out (layered degradation), so the cover only has to hold the surface's
 * visual weight — it no longer has to HIDE anything, which is what used to
 * force it up to the near-opaque mask peak and made the recovery read as a
 * solid colour slowly draining away.
 */
export declare const REFRACTION_MOTION_COVER_OPACITY = 0.55;
export declare const REFRACTION_MASK_PEAK_RAMP_DURATION_MS = 180;
export declare const REFRACTION_EDGE_REVEAL_DELAY_MS = 60;
export declare const REFRACTION_EDGE_REVEAL_DURATION_MS = 220;
export declare const REFRACTION_MASK_RELEASE_SLOWDOWN = 1;
export declare const REFRACTION_MOVING_PARAM_FLOOR = 0.28;
interface UseBaseSurfaceMotionOptions {
    props: Readonly<BaseSurfaceProps>;
    /** The mode the surface renders, after `autoDetect`'s environment degradation; `props.mode` when absent. */
    mode?: ComputedRef<BaseSurfaceMode>;
    /** Page-wide motion `autoDetect` infers (a fast drag, a moving window), already held for its settle time. */
    environmentMoving?: ComputedRef<boolean>;
    /** How long the surface's own transform signals stay quiet before the motion ends; 140ms by default. */
    autoDetectSettleMs?: number;
    rootRef: Ref<HTMLElement | null>;
    needsFallback: ComputedRef<boolean>;
    settleDelayMs: ComputedRef<number>;
    refractionRecoveryBlendDurationMs: ComputedRef<number>;
    refractionRecoveryTotalDurationMs: ComputedRef<number>;
}
export declare function useBaseSurfaceMotion(options: UseBaseSurfaceMotionOptions): {
    isMoving: ComputedRef<boolean>;
    settling: Ref<boolean, boolean>;
    refractionRecovering: Ref<boolean, boolean>;
    refractionRecoveryProgress: Ref<number, number>;
    refractionRecoveryElapsed: Ref<number, number>;
    refractionMaskPeakRampProgress: Ref<number, number>;
    refractionEdgeRevealProgress: Ref<number, number>;
};
export {};