import { AnimationBlendMode } from "../constants.js";
import { EventDispatcher } from "../core/EventDispatcher.js";
import { Object3D } from "../core/Object3D.js";
import { AnimationAction } from "./AnimationAction.js";
import { AnimationClip } from "./AnimationClip.js";
import { AnimationObjectGroup } from "./AnimationObjectGroup.js";

export interface AnimationMixerEventMap {
    loop: { action: AnimationAction; loopDelta: number };
    finished: { action: AnimationAction; direction: number };
}

export class AnimationMixer extends EventDispatcher<AnimationMixerEventMap> {
    constructor(root: Object3D | AnimationObjectGroup);

    /**
     * @default 0
     */
    time: number;

    /**
     * @default 1.0
     */
    timeScale: number;

    clipAction(
        clip: AnimationClip,
        root?: Object3D | AnimationObjectGroup,
        blendMode?: AnimationBlendMode,
    ): AnimationAction;
    existingAction(clip: AnimationClip, root?: Object3D | AnimationObjectGroup): AnimationAction | null;
    stopAllAction(): AnimationMixer;
    update(deltaTime: number): AnimationMixer;
    setTime(timeInSeconds: number): AnimationMixer;
    getRoot(): Object3D | AnimationObjectGroup;
    uncacheClip(clip: AnimationClip): void;
    uncacheRoot(root: Object3D | AnimationObjectGroup): void;
    uncacheAction(clip: AnimationClip, root?: Object3D | AnimationObjectGroup): void;
}