// @flow strict

import * as React from 'react';

import classify from '../../utils/classify';
import {Icon} from '../Icon';
import type {BaseLinkProps} from '../Link';

import css from './Breadcrumbs.module.css';


type ClassNames = $ReadOnly<{wrapper?: string}>;

export type BreadcrumbsProps = {
  classNames?: ClassNames,
  children: React.Node,
  linkComponent?: React.AbstractComponent<BaseLinkProps, ?HTMLAnchorElement>,
};

const BreadcrumbSeparator = (): React.Node => (
  <Icon
    className={css.separator}
    name="chevron-right"
    size="small"
    color="secondary"
  />
);

export const Breadcrumbs: React$AbstractComponent<
  BreadcrumbsProps,
  HTMLDivElement,
> = React.forwardRef<BreadcrumbsProps, HTMLDivElement>(
  ({classNames, children, linkComponent}: BreadcrumbsProps, ref) => {
    const total = React.Children.count(children);

    return (
      <div
        ref={ref}
        data-testid="Breadcrumbs"
        className={classify(css.wrapper, classNames?.wrapper)}
      >
        {React.Children.map(children, (child, idx) => (
          // eslint-disable-next-line react/no-array-index-key
          <React.Fragment key={`crumb-${idx}`}>
            {/*add linkComponent to BreadcrumbLinks only,
            otherwise return original element */}
            {React.isValidElement(child) &&
            child?.type?.displayName === 'BreadcrumbLink'
              ? React.cloneElement(child, {linkComponent})
              : child}

            {/*Add Separator*/}
            {idx < total - 1 && <BreadcrumbSeparator aria-hidden />}
          </React.Fragment>
        ))}
      </div>
    );
  },
);