/* skip-links-container.tsx generated by @compiled/babel-plugin v0.38.1 */
import "./skip-links-container.compiled.css";
import * as React from 'react';
import { ax, ix } from "@compiled/react/runtime";
import { useMemo } from 'react';
import { Text } from '@atlaskit/primitives/compiled';
import { SkipLink } from './skip-link';
const styles = {
  root: "_zulp1b66 _2rko12b0 _1rjcutpp _18zrutpp _1e0c1txw _2lx21bp4 _kqsw1n9t _1e02v47k _152tv47k _bfhk1bhr _16qs1cd0 _1pby1mrw _tzy4idpf _lcxvglyw _1digjh3g _1mygkb7n _18eu1wug",
  skipLinkList: "_zulp1b66 _1e0c1txw _2lx21bp4 _1x8w11lx _2mzuglyw _1pfhze3t _bozgze3t"
};

/**
 * Keydown handler to hide the skip links when escape is pressed.
 *
 * TODO: consider removing this, it doesn't make a lot of sense.
 * The skip links look like a popup but in reality they aren't.
 * Even though we hide them when the user presses Escape, when
 * they press TAB it will reopen the list and move to the next one...
 *
 * One potential option is to use a tree walker to focus on the
 * next focusable element in the DOM (outside the skip links
 * container).
 */
const closeOnEscape = event => {
  if (event.key !== 'Escape') {
    return;
  }
  const activeElement = document.activeElement;
  if (activeElement instanceof HTMLElement) {
    activeElement.blur();
  }
};
const assignIndex = (num, arr) => {
  if (!arr.includes(num)) {
    return num;
  }
  return assignIndex(num + 1, arr);
};

/**
 * Sorts an array of skip links by list indexes.
 *
 * Skip links with custom list indexes are positioned first, followed by regular skip links,
 * which are automatically assigned available index positions to avoid conflicts.
 */
function sortSkipLinks(arr) {
  const customLinks = arr.filter(link => Number.isInteger(link.listIndex));
  if (customLinks.length === 0) {
    return arr;
  }
  const usedIndexes = customLinks.map(a => a.listIndex);
  const regularLinksWithIndex = arr.filter(link => link.listIndex === undefined).map((link, index) => {
    const listIndex = assignIndex(index, usedIndexes);
    usedIndexes.push(listIndex);
    return {
      ...link,
      listIndex
    };
  });
  return [...customLinks, ...regularLinksWithIndex].sort((a, b) => a.listIndex - b.listIndex);
}
const isOnlyWhitespaceRegex = /^\s*$/;

/**
 * A container element for the skip links.
 *
 * The container element is always rendered in the DOM, but is only visible when
 * focus is within the container.
 *
 * The label is used as the heading of the skip links container. If the provided label is a string
 * comprised only of only whitespace (e.g. '' or ' '), the skip link heading element will be removed.
 *
 * The links prop is only used when the feature flag is enabled.
 */
export function SkipLinksContainer({
  label,
  testId,
  links
}) {
  const sortedLinks = useMemo(() => {
    return sortSkipLinks(links);
  }, [links]);
  if (sortedLinks.length === 0) {
    return null;
  }
  const isEmptyLabel = isOnlyWhitespaceRegex.test(label);
  return /*#__PURE__*/React.createElement("div", {
    onKeyDown: closeOnEscape,
    "data-testid": testId ? `${testId}--skip-links-container` : undefined,
    className: ax([styles.root])
  }, !isEmptyLabel && /*#__PURE__*/React.createElement(Text, {
    weight: "bold",
    testId: testId ? `${testId}--skip-links-container--label` : undefined
  }, label), /*#__PURE__*/React.createElement("ol", {
    className: ax([styles.skipLinkList])
  }, sortedLinks.map(({
    id,
    label,
    onBeforeNavigate
  }) => /*#__PURE__*/React.createElement(SkipLink, {
    key: id,
    id: id,
    onBeforeNavigate: onBeforeNavigate
  }, label))));
}