import type { AnimationGroup } from "@babylonjs/core/Animations/animationGroup.js";
import type { CapabilityDescription, ImportedAnimationSelection, SceneAnimationCancellationReason } from "@skenora/contracts";
import type { ManagedImportedAnimationPorts } from "./managed-imported-animation.js";
export interface AnimationCrossfadeOptions {
    durationMs?: number;
    speedRatio?: number;
    loop?: boolean;
    signal?: AbortSignal;
}
export interface AnimationMixerState {
    status: "idle" | "running" | "paused" | "completed" | "cancelled" | "failed";
    elapsedMs: number;
    weight: number;
    from?: ImportedAnimationSelection;
    to?: ImportedAnimationSelection;
    reason?: string;
}
export declare class AnimationMixerError extends Error {
    readonly code: "animation-mixer-invalid" | "animation-mixer-unavailable" | "animation-mixer-target-lost";
    constructor(code: "animation-mixer-invalid" | "animation-mixer-unavailable" | "animation-mixer-target-lost", message: string);
}
/** Bounded two-group pose crossfade, sampled by Babylon and composed with Babylon math. */
export declare class ManagedAnimationMixer {
    #private;
    readonly ports: ManagedImportedAnimationPorts;
    constructor(ports: ManagedImportedAnimationPorts);
    crossfade(from: AnimationGroup, to: AnimationGroup, options?: AnimationCrossfadeOptions): Promise<AnimationMixerState>;
    getState(): AnimationMixerState;
    pause(): boolean;
    resume(): boolean;
    /** Seek the two playback cursors and crossfade in accepted simulation milliseconds; leaves paused. */
    seek(elapsedMs: number): AnimationMixerState;
    stop(reason?: SceneAnimationCancellationReason): void;
    reset(reason?: SceneAnimationCancellationReason, restore?: boolean): void;
    dispose(): void;
}
export declare function describeAnimationMixerCapability(): CapabilityDescription;
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