import React from 'react';
import PropTypes from 'prop-types';
import ReactDOM from 'react-dom';
import { createClass, omitProps } from '../../util/component-types';
import { lucidClassNames } from '../../util/style-helpers';

const cx = lucidClassNames.bind('&-Portal');

const { any, node, string } = PropTypes;

/**
 *
 * {"categories": ["utility"]}
 *
 * A Portal component is used to render content in a container that is appended
 * to `document.body`.
 */
const Portal = createClass({
	displayName: 'Portal',
	propTypes: {
		/**
		 * any valid React children
		 */
		children: node,
		/**
		 * Appended to the component-specific class names set on the root
		 * element. Value is run through the `classnames` library.
		 */
		className: any,
		/**
		 * The `id` of the portal element that is appended to `document.body`.
		 */
		portalId: string.isRequired,
	},
	render: () => null,
	componentDidMount() {
		const { portalId } = this.props;

		let portalElement = window.document.getElementById(portalId);
		if (!portalElement) {
			portalElement = window.document.createElement('div');
			portalElement.id = portalId;
			window.document.body.appendChild(portalElement);
		}
		this.portalElement = portalElement;
		this.componentDidUpdate();
	},
	componentWillUnmount() {
		window.document.body.removeChild(this.portalElement);
	},
	componentDidUpdate() {
		ReactDOM.render(
			<div
				{...omitProps(this.props, Portal)}
				className={cx('&', this.props.className)}
			>
				{this.props.children}
			</div>,
			this.portalElement
		);
	},
});

export default Portal;