'use client';
import * as React from 'react';
import { getReactElementRef, useMergedRefs } from '@fluentui/react-utilities';
const CHILD_ERROR_MESSAGE = [
    '@fluentui/react-motion: Invalid child element.',
    '\n',
    'Motion factories require a single child element to be passed. ',
    'That element element should support ref forwarding i.e. it should be either an intrinsic element (e.g. div) or a component that uses React.forwardRef().'
].join('');
/**
 * Validates the child and returns a cloned child element with a ref.
 *
 * Throws an error if the child is not a valid React element, similar to "React.Children.only".
 * Logs a warning in development mode if the ref is not set as the component remains functional.
 */ export function useChildElement(children, mounted = true) {
    const childRef = React.useRef(null);
    React.useEffect(()=>{
        if (process.env.NODE_ENV !== 'production') {
            if (mounted && !childRef.current) {
                // eslint-disable-next-line no-console
                console.error(CHILD_ERROR_MESSAGE);
            }
        }
    }, [
        mounted
    ]);
    try {
        const child = React.Children.only(children);
        if (React.isValidElement(child)) {
            return [
                React.cloneElement(child, {
                    ref: useMergedRefs(childRef, getReactElementRef(child))
                }),
                childRef
            ];
        }
    } catch  {
    /* empty */ }
    throw new Error(CHILD_ERROR_MESSAGE);
}