import React, { type JSX, memo, useCallback, useEffect } from 'react';
import { type IPageHasId, isPopulated } from '@growi/core';
import { DevidedPagePath } from '@growi/core/dist/models';
import { UserPicture } from '@growi/ui/dist/components';
import { useTranslation } from 'react-i18next';

import FormattedDistanceDate from '~/client/components/FormattedDistanceDate';
import InfiniteScroll from '~/client/components/InfiniteScroll';
import { PagePathHierarchicalLink } from '~/components/Common/PagePathHierarchicalLink';
import LinkedPagePath from '~/models/linked-page-path';
import { useSetSearchKeyword } from '~/states/search';
import { useSWRINFxRecentlyUpdated } from '~/stores/page-listing';
import loggerFactory from '~/utils/logger';

import { SidebarHeaderReloadButton } from '../SidebarHeaderReloadButton';

import styles from './RecentChangesSubstance.module.scss';

const formerLinkClass = styles['grw-former-link'];
const pageItemLowerClass = styles['grw-recent-changes-item-lower'];

// eslint-disable-next-line @typescript-eslint/no-unused-vars
const logger = loggerFactory('growi:History');

type PageItemLowerProps = {
  page: IPageHasId;
};

type PageItemProps = PageItemLowerProps & {
  isSmall: boolean;
  onClickTag?: (tagName: string) => void;
};

const PageItemLower = memo(({ page }: PageItemLowerProps): JSX.Element => {
  return (
    <div
      className={`${pageItemLowerClass} d-flex justify-content-between grw-recent-changes-item-lower`}
    >
      <div className="d-flex align-items-center">
        <div className="">
          <span className="material-symbols-outlined p-0">footprint</span>
          <span className="grw-list-counts ms-1">{page.seenUsers.length}</span>
        </div>
        <div className="ms-2">
          <span className="material-symbols-outlined p-0">chat</span>
          <span className="grw-list-counts ms-1">{page.commentCount}</span>
        </div>
      </div>
      <div
        className="grw-formatted-distance-date mt-auto"
        data-vrt-blackout-datetime
      >
        <FormattedDistanceDate id={page._id} date={page.updatedAt} />
      </div>
    </div>
  );
});
PageItemLower.displayName = 'PageItemLower';

type PageTagsProps = PageItemProps;
const PageTags = memo((props: PageTagsProps): JSX.Element => {
  const { page, isSmall, onClickTag } = props;

  if (isSmall || page.tags.length === 0) {
    return <></>;
  }

  return (
    <>
      {page.tags.map((tag) => {
        if (!isPopulated(tag)) {
          return <></>;
        }
        return (
          <button
            key={tag.name}
            type="button"
            className="grw-tag badge me-2"
            onClick={() => onClickTag?.(tag.name)}
          >
            {tag.name}
          </button>
        );
      })}
    </>
  );
});
PageTags.displayName = 'PageTags';

const PageItem = memo(
  ({ page, isSmall, onClickTag }: PageItemProps): JSX.Element => {
    const dPagePath = new DevidedPagePath(page.path, false, true);
    const linkedPagePathFormer = new LinkedPagePath(dPagePath.former);
    const linkedPagePathLatter = new LinkedPagePath(dPagePath.latter);
    const formerLink = (
      <div
        className={`${formerLinkClass} ${isSmall ? 'text-truncate small' : ''}`}
      >
        <PagePathHierarchicalLink linkedPagePath={linkedPagePathFormer} />
      </div>
    );

    let locked: JSX.Element | null = null;
    if (page.grant !== 1) {
      locked = (
        <span className="material-symbols-outlined ms-2 fs-6">lock</span>
      );
    }

    const isTagElementsRendered = !(isSmall || page.tags.length === 0);

    return (
      <li className={`list-group-item ${styles['list-group-item']} py-2 px-0`}>
        <div className="d-flex w-100">
          <div>
            <UserPicture
              user={page.lastUpdateUser}
              size="md"
              className="d-inline-block"
            />
          </div>

          <div className="flex-grow-1 ms-2">
            <div className={`row ${isSmall ? 'gy-0' : 'gy-1'}`}>
              <div className="col-12">{!dPagePath.isRoot && formerLink}</div>

              <h6
                className={`col-12 d-flex align-items-center ${isSmall ? 'mb-0 text-truncate' : 'mb-0'}`}
              >
                <PagePathHierarchicalLink
                  linkedPagePath={linkedPagePathLatter}
                  basePath={dPagePath.isRoot ? undefined : dPagePath.former}
                />
                {page.wip && (
                  <span className="wip-page-badge badge rounded-pill text-bg-secondary ms-2">
                    WIP
                  </span>
                )}
                {locked}
              </h6>

              {isTagElementsRendered && (
                <div className="col-12">
                  <PageTags
                    isSmall={isSmall}
                    page={page}
                    onClickTag={onClickTag}
                  />
                </div>
              )}

              <div className="col-12">
                <PageItemLower page={page} />
              </div>
            </div>
          </div>
        </div>
      </li>
    );
  },
);
PageItem.displayName = 'PageItem';

type HeaderProps = {
  isSmall: boolean;
  onSizeChange: (isSmall: boolean) => void;
  isWipPageShown: boolean;
  onWipPageShownChange: () => void;
};

export const RecentChangesHeader = ({
  isSmall,
  onSizeChange,
  isWipPageShown,
  onWipPageShownChange,
}: HeaderProps): JSX.Element => {
  const { t } = useTranslation();

  const { mutate } = useSWRINFxRecentlyUpdated(isWipPageShown, {
    suspense: true,
  });

  const retrieveSizePreferenceFromLocalStorage = useCallback(() => {
    if (window.localStorage.isRecentChangesSidebarSmall === 'true') {
      onSizeChange(true);
    }
  }, [onSizeChange]);

  const changeSizeHandler = useCallback(() => {
    onSizeChange(!isSmall);
    window.localStorage.setItem('isRecentChangesSidebarSmall', String(isSmall));
  }, [isSmall, onSizeChange]);

  // componentDidMount
  useEffect(() => {
    retrieveSizePreferenceFromLocalStorage();
  }, [retrieveSizePreferenceFromLocalStorage]);

  return (
    <>
      <SidebarHeaderReloadButton onClick={() => mutate()} />

      <div className="me-1">
        <button
          color="transparent"
          className="btn p-0 border-0"
          type="button"
          data-bs-toggle="dropdown"
          data-bs-auto-close="outside"
          aria-expanded="false"
        >
          <span className="material-symbols-outlined">more_horiz</span>
        </button>

        <ul className="dropdown-menu">
          <li>
            <button
              type="button"
              className="dropdown-item"
              onClick={changeSizeHandler}
            >
              <div
                className={`${styles['grw-recent-changes-resize-button']} form-check form-switch mb-0`}
              >
                <input
                  id="recent-changes-resize-toggle"
                  className="form-check-input pe-none"
                  type="checkbox"
                  checked={isSmall}
                  onChange={() => {}}
                />
                <label
                  className="form-check-label pe-none"
                  htmlFor="recent-changes-resize-toggle"
                  aria-disabled="true"
                >
                  {t('sidebar_header.compact_view')}
                </label>
              </div>
            </button>
          </li>

          <li>
            <button
              type="button"
              className="dropdown-item"
              onClick={onWipPageShownChange}
            >
              <div className="form-check form-switch mb-0">
                <input
                  id="recent-changes-wip-toggle"
                  className="form-check-input"
                  type="checkbox"
                  checked={isWipPageShown}
                  onChange={() => {}}
                />
                <label
                  className="form-check-label pe-none"
                  htmlFor="recent-changes-wip-toggle"
                >
                  {t('sidebar_header.show_wip_page')}
                </label>
              </div>
            </button>
          </li>
        </ul>
      </div>
    </>
  );
};

type ContentProps = {
  isSmall: boolean;
  isWipPageShown: boolean;
};

export const RecentChangesContent = ({
  isSmall,
  isWipPageShown,
}: ContentProps): JSX.Element => {
  const swrInifinitexRecentlyUpdated = useSWRINFxRecentlyUpdated(
    isWipPageShown,
    { suspense: true },
  );
  const { data } = swrInifinitexRecentlyUpdated;

  const setSearchKeyword = useSetSearchKeyword();
  const isEmpty = data?.[0]?.pages.length === 0;
  const lastPageIndex = data?.length ? data.length - 1 : 0;
  const isReachingEnd =
    isEmpty ||
    (data != null &&
      lastPageIndex > 0 &&
      data[lastPageIndex]?.pages.length <
        data[lastPageIndex - 1]?.pages.length);
  return (
    <div className="grw-recent-changes">
      <ul className="list-group list-group-flush">
        <InfiniteScroll
          swrInifiniteResponse={swrInifinitexRecentlyUpdated}
          isReachingEnd={isReachingEnd}
        >
          {data != null &&
            data
              .flatMap((apiResult) => apiResult.pages)
              .map((page) => (
                <PageItem
                  key={page._id}
                  page={page}
                  isSmall={isSmall}
                  onClickTag={(tagName) => setSearchKeyword(`tag:${tagName}`)}
                />
              ))}
        </InfiniteScroll>
      </ul>
    </div>
  );
};