class GroupAnimation {
    constructor(animations) {
        // Bound to accomadate common `return animation.stop` pattern
        this.stop = () => this.runAll("stop");
        this.animations = animations.filter(Boolean);
    }
    get finished() {
        return Promise.all(this.animations.map((animation) => animation.finished));
    }
    /**
     * TODO: Filter out cancelled or stopped animations before returning
     */
    getAll(propName) {
        return this.animations[0][propName];
    }
    setAll(propName, newValue) {
        for (let i = 0; i < this.animations.length; i++) {
            this.animations[i][propName] = newValue;
        }
    }
    attachTimeline(timeline) {
        const subscriptions = this.animations.map((animation) => animation.attachTimeline(timeline));
        return () => {
            subscriptions.forEach((cancel, i) => {
                cancel && cancel();
                this.animations[i].stop();
            });
        };
    }
    get time() {
        return this.getAll("time");
    }
    set time(time) {
        this.setAll("time", time);
    }
    get speed() {
        return this.getAll("speed");
    }
    set speed(speed) {
        this.setAll("speed", speed);
    }
    get state() {
        return this.getAll("state");
    }
    get startTime() {
        return this.getAll("startTime");
    }
    get duration() {
        return getMax(this.animations, "duration");
    }
    get iterationDuration() {
        return getMax(this.animations, "iterationDuration");
    }
    runAll(methodName) {
        this.animations.forEach((controls) => controls[methodName]());
    }
    play() {
        this.runAll("play");
    }
    pause() {
        this.runAll("pause");
    }
    cancel() {
        this.runAll("cancel");
    }
    complete() {
        this.runAll("complete");
    }
}
function getMax(animations, propName) {
    let max = 0;
    for (let i = 0; i < animations.length; i++) {
        const value = animations[i][propName];
        if (value !== null && value > max) {
            max = value;
        }
    }
    return max;
}

export { GroupAnimation };