import React, { useCallback } from 'react';

import { PagePathLabel, UserPicture } from '@growi/ui/dist/components';
import { useDebounce } from 'usehooks-ts';

import { useSWRxSearch } from '~/stores/search';

import type { GetItemProps } from '../interfaces/downshift';

import { SearchMenuItem } from './SearchMenuItem';

type Props = {
  activeIndex: number | null,
  searchKeyword: string,
  getItemProps: GetItemProps,
}
export const SearchResultMenuItem = (props: Props): JSX.Element => {
  const { activeIndex, searchKeyword, getItemProps } = props;

  const debouncedKeyword = useDebounce(searchKeyword, 500);

  const isEmptyKeyword = searchKeyword.trim().length === 0;

  const { data: searchResult, isLoading } = useSWRxSearch(isEmptyKeyword ? null : debouncedKeyword, null, { limit: 10 });

  /**
   *  SearchMenu is a combination of a list of SearchMethodMenuItem and SearchResultMenuItem (this component).
   *  If no keywords are entered into SearchForm, SearchMethodMenuItem returns a single item. Conversely, when keywords are entered, three items are returned.
   *  For these reasons, the starting index of SearchResultMemuItem changes depending on the presence or absence of the searchKeyword.
   */
  const getFiexdIndex = useCallback((index: number) => {
    return (isEmptyKeyword ? 1 : 3) + index;
  }, [isEmptyKeyword]);

  if (isLoading) {
    return (
      <>
        <div className="border-top mt-2 mb-2" />
        Searching...
        <div className="border-top" />
      </>
    );
  }

  if (isEmptyKeyword || searchResult == null || searchResult.data.length === 0) {
    return <></>;
  }

  return (
    <div>
      <div className="border-top mt-2 mb-2" />
      {searchResult?.data
        .map((item, index) => (
          <SearchMenuItem
            key={item.data._id}
            index={getFiexdIndex(index)}
            isActive={getFiexdIndex(index) === activeIndex}
            getItemProps={getItemProps}
            url={item.data._id}
          >
            <UserPicture user={item.data.creator} />

            <span className="ms-3 text-break text-wrap">
              <PagePathLabel path={item.data.path} />
            </span>

            <span className="text-body-tertiary ms-2 d-flex justify-content-center align-items-center">
              <span className="material-symbols-outlined fs-6 p-0">footprint</span>
              <span className="fs-6">{item.data.seenUsers.length}</span>
            </span>
          </SearchMenuItem>
        ))
      }
    </div>
  );
};