import React, {
  type JSX,
  memo,
  useCallback,
  useEffect,
  useId,
  useMemo,
  useRef,
} from 'react';
import type {
  IPageInfo,
  IPageToDeleteWithMeta,
  IPageToRenameWithMeta,
} from '@growi/core';
import {
  isIPageInfoForEmpty,
  isIPageInfoForEntity,
  isIPageInfoForOperation,
} from '@growi/core';
import { useRect } from '@growi/ui/dist/utils';
import { useTranslation } from 'next-i18next';
import { DropdownItem } from 'reactstrap';

import { toggleLike, toggleSubscribe } from '~/client/services/page-operation';
import { toastError } from '~/client/util/toastr';
import OpenDefaultAiAssistantButton from '~/features/openai/client/components/AiAssistant/OpenDefaultAiAssistantButton';
import {
  useIsGuestUser,
  useIsReadOnlyUser,
  useIsSearchPage,
} from '~/states/context';
import { useCurrentPagePath } from '~/states/page';
import { useDeviceLargerThanMd } from '~/states/ui/device';
import { EditorMode, useEditorMode } from '~/states/ui/editor';
import type { IPageForPageDuplicateModal } from '~/states/ui/modal/page-duplicate';
import { useTagEditModalActions } from '~/states/ui/modal/tag-edit';
import { useSetPageControlsX } from '~/states/ui/page';
import loggerFactory from '~/utils/logger';

import { useSWRxPageInfo, useSWRxTagsInfo } from '../../../stores/page';
import { useSWRxUsersList } from '../../../stores/user';
import type {
  AdditionalMenuItemsRendererProps,
  ForceHideMenuItems,
} from '../Common/Dropdown/PageItemControl';
import {
  MenuItemType,
  PageItemControl,
} from '../Common/Dropdown/PageItemControl';
import { BookmarkButtons } from './BookmarkButtons';
import LikeButtons from './LikeButtons';
import SearchButton from './SearchButton';
import SeenUserInfo from './SeenUserInfo';
import SubscribeButton from './SubscribeButton';

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

const logger = loggerFactory('growi:components/PageControls');

type TagsProps = {
  onClickEditTagsButton: () => void;
};

const Tags = (props: TagsProps): JSX.Element => {
  const { onClickEditTagsButton } = props;
  const { t } = useTranslation();

  return (
    <div className="grw-tag-labels-container d-flex align-items-center">
      <button
        type="button"
        className="btn btn-sm btn-outline-neutral-secondary"
        onClick={onClickEditTagsButton}
      >
        <span className="material-symbols-outlined">local_offer</span>
        <span className="d-none d-sm-inline ms-1">{t('Tags')}</span>
      </button>
    </div>
  );
};

type WideViewMenuItemProps = AdditionalMenuItemsRendererProps & {
  onClick: () => void;
  expandContentWidth?: boolean;
};

const WideViewMenuItem = (props: WideViewMenuItemProps): JSX.Element => {
  const { t } = useTranslation();

  const { onClick, expandContentWidth } = props;
  const wideViewId = useId();

  return (
    <DropdownItem
      className="grw-page-control-dropdown-item dropdown-item"
      onClick={onClick}
      toggle={false}
    >
      <div className="form-check form-switch ms-1">
        <input
          className="form-check-input pe-none"
          type="checkbox"
          id={wideViewId}
          checked={expandContentWidth}
          onChange={() => {}}
        />
        <label className="form-check-label pe-none" htmlFor={wideViewId}>
          {t('wide_view')}
        </label>
      </div>
    </DropdownItem>
  );
};

type CommonProps = {
  pageId?: string;
  shareLinkId?: string | null;
  revisionId?: string | null;
  path?: string | null;
  expandContentWidth?: boolean;
  disableSeenUserInfoPopover?: boolean;
  hideSubControls?: boolean;
  showPageControlDropdown?: boolean;
  forceHideMenuItems?: ForceHideMenuItems;
  additionalMenuItemRenderer?: React.FunctionComponent<AdditionalMenuItemsRendererProps>;
  onClickDuplicateMenuItem?: (
    pageToDuplicate: IPageForPageDuplicateModal,
  ) => void;
  onClickRenameMenuItem?: (pageToRename: IPageToRenameWithMeta) => void;
  onClickDeleteMenuItem?: (pageToDelete: IPageToDeleteWithMeta) => void;
  onClickSwitchContentWidth?: (pageId: string, value: boolean) => void;
};

type PageControlsSubstanceProps = CommonProps & {
  pageInfo: IPageInfo | undefined;
  onClickEditTagsButton: () => void;
};

const PageControlsSubstance = (
  props: PageControlsSubstanceProps,
): JSX.Element => {
  const {
    pageInfo,
    pageId,
    revisionId,
    path,
    shareLinkId,
    expandContentWidth,
    disableSeenUserInfoPopover,
    hideSubControls,
    showPageControlDropdown,
    forceHideMenuItems,
    additionalMenuItemRenderer,
    onClickEditTagsButton,
    onClickDuplicateMenuItem,
    onClickRenameMenuItem,
    onClickDeleteMenuItem,
    onClickSwitchContentWidth,
  } = props;

  const isGuestUser = useIsGuestUser();
  const isReadOnlyUser = useIsReadOnlyUser();
  const { editorMode } = useEditorMode();
  const [isDeviceLargerThanMd] = useDeviceLargerThanMd();
  const isSearchPage = useIsSearchPage();
  const currentPagePath = useCurrentPagePath();

  const { mutate: mutatePageInfo } = useSWRxPageInfo(pageId, shareLinkId);

  const likerIds = isIPageInfoForEntity(pageInfo)
    ? (pageInfo.likerIds ?? []).slice(0, 15)
    : [];
  const seenUserIds = isIPageInfoForEntity(pageInfo)
    ? (pageInfo.seenUserIds ?? []).slice(0, 15)
    : [];

  const setPageControlsX = useSetPageControlsX();

  const pageControlsRef = useRef<HTMLDivElement>(null);
  const [pageControlsRect] = useRect(pageControlsRef);

  useEffect(() => {
    if (pageControlsRect?.x == null) {
      return;
    }
    setPageControlsX(pageControlsRect.x);
  }, [pageControlsRect?.x, setPageControlsX]);

  // Put in a mixture of seenUserIds and likerIds data to make the cache work
  const { data: usersList } = useSWRxUsersList([...likerIds, ...seenUserIds]);
  const likers =
    usersList != null
      ? usersList.filter(({ _id }) => likerIds.includes(_id)).slice(0, 15)
      : [];
  const seenUsers =
    usersList != null
      ? usersList.filter(({ _id }) => seenUserIds.includes(_id)).slice(0, 15)
      : [];

  const subscribeClickhandler = useCallback(async () => {
    if (isGuestUser) {
      logger.warn('Guest users cannot subscribe to pages');
      return;
    }
    if (!isIPageInfoForOperation(pageInfo) || pageId == null) {
      logger.warn('PageInfo is not for operation or pageId is null');
      return;
    }

    await toggleSubscribe(pageId, pageInfo.subscriptionStatus);
    mutatePageInfo();
  }, [isGuestUser, mutatePageInfo, pageId, pageInfo]);

  const likeClickhandler = useCallback(async () => {
    if (isGuestUser) {
      logger.warn('Guest users cannot like pages');
      return;
    }
    if (!isIPageInfoForOperation(pageInfo) || pageId == null) {
      logger.warn('PageInfo is not for operation or pageId is null');
      return;
    }

    await toggleLike(pageId, pageInfo.isLiked);
    mutatePageInfo();
  }, [isGuestUser, mutatePageInfo, pageId, pageInfo]);

  const duplicateMenuItemClickHandler = useCallback(async (): Promise<void> => {
    if (onClickDuplicateMenuItem == null || pageId == null || path == null) {
      logger.warn(
        'Cannot duplicate the page because onClickDuplicateMenuItem, pageId or path is null',
      );
      return;
    }
    const page: IPageForPageDuplicateModal = { pageId, path };

    onClickDuplicateMenuItem(page);
  }, [onClickDuplicateMenuItem, pageId, path]);

  const renameMenuItemClickHandler = useCallback(async (): Promise<void> => {
    if (onClickRenameMenuItem == null || pageId == null || path == null) {
      logger.warn(
        'Cannot rename the page because onClickRenameMenuItem, pageId or path is null',
      );
      return;
    }

    const page: IPageToRenameWithMeta = {
      data: {
        _id: pageId,
        revision: revisionId ?? null,
        path,
      },
      meta: pageInfo,
    };

    onClickRenameMenuItem(page);
  }, [onClickRenameMenuItem, pageId, pageInfo, path, revisionId]);

  const deleteMenuItemClickHandler = useCallback(async (): Promise<void> => {
    if (onClickDeleteMenuItem == null || pageId == null || path == null) {
      logger.warn(
        'Cannot delete the page because onClickDeleteMenuItem, pageId or path is null',
      );
      return;
    }

    const pageToDelete: IPageToDeleteWithMeta = {
      data: {
        _id: pageId,
        revision: revisionId ?? null,
        path,
      },
      meta: pageInfo,
    };

    onClickDeleteMenuItem(pageToDelete);
  }, [onClickDeleteMenuItem, pageId, pageInfo, path, revisionId]);

  const switchContentWidthClickHandler = useCallback(() => {
    if (isGuestUser || isReadOnlyUser) {
      logger.warn('Guest or read-only users cannot switch content width');
      return;
    }

    if (onClickSwitchContentWidth == null || pageId == null) {
      logger.warn(
        'Cannot switch content width because onClickSwitchContentWidth or pageId is null',
      );
      return;
    }
    if (!isIPageInfoForEntity(pageInfo)) {
      logger.warn('PageInfo is not for entity');
      return;
    }

    try {
      const newValue = !expandContentWidth;
      onClickSwitchContentWidth(pageId, newValue);
    } catch (err) {
      toastError(err);
    }
  }, [
    expandContentWidth,
    isGuestUser,
    isReadOnlyUser,
    onClickSwitchContentWidth,
    pageId,
    pageInfo,
  ]);

  const isEnableActions = useMemo(() => {
    if (isGuestUser) {
      return false;
    }

    if (currentPagePath == null) {
      return false;
    }

    return true;
  }, [currentPagePath, isGuestUser]);

  const additionalMenuItemOnTopRenderer = useMemo(() => {
    if (!isIPageInfoForEntity(pageInfo)) {
      return undefined;
    }
    if (onClickSwitchContentWidth == null) {
      return undefined;
    }

    const wideviewMenuItemRenderer = (props: WideViewMenuItemProps) => {
      return (
        <WideViewMenuItem
          {...props}
          onClick={switchContentWidthClickHandler}
          expandContentWidth={expandContentWidth}
        />
      );
    };
    return wideviewMenuItemRenderer;
  }, [
    pageInfo,
    expandContentWidth,
    onClickSwitchContentWidth,
    switchContentWidthClickHandler,
  ]);

  const forceHideMenuItemsWithAdditions = [
    ...(forceHideMenuItems ?? []),
    MenuItemType.BOOKMARK,
    MenuItemType.REVERT,
  ];

  const isViewMode = editorMode === EditorMode.View;

  return (
    <div
      className={`${styles['grw-page-controls']} hstack gap-2`}
      ref={pageControlsRef}
    >
      {isViewMode && isDeviceLargerThanMd && !isSearchPage && !isSearchPage && (
        <>
          <SearchButton />
          <OpenDefaultAiAssistantButton />
        </>
      )}

      {revisionId != null && !isViewMode && (
        <Tags onClickEditTagsButton={onClickEditTagsButton} />
      )}

      {!hideSubControls && (
        <div className={`hstack gap-1 ${!isViewMode && 'd-none d-lg-flex'}`}>
          {isIPageInfoForOperation(pageInfo) && (
            <SubscribeButton
              status={pageInfo.subscriptionStatus}
              onClick={subscribeClickhandler}
            />
          )}
          {isIPageInfoForOperation(pageInfo) && (
            <LikeButtons
              onLikeClicked={likeClickhandler}
              sumOfLikers={pageInfo.sumOfLikers}
              isLiked={pageInfo.isLiked}
              likers={likers}
            />
          )}
          {(isIPageInfoForOperation(pageInfo) ||
            isIPageInfoForEmpty(pageInfo)) &&
            pageId != null && (
              <BookmarkButtons
                pageId={pageId}
                isBookmarked={pageInfo.isBookmarked}
                bookmarkCount={pageInfo.bookmarkCount}
              />
            )}
          {isIPageInfoForEntity(pageInfo) && !isSearchPage && (
            <SeenUserInfo
              seenUsers={seenUsers}
              sumOfSeenUsers={pageInfo.sumOfSeenUsers}
              disabled={disableSeenUserInfoPopover}
            />
          )}
        </div>
      )}

      {showPageControlDropdown && (
        <PageItemControl
          pageId={pageId}
          pageInfo={pageInfo}
          isEnableActions={isEnableActions}
          isReadOnlyUser={!!isReadOnlyUser}
          forceHideMenuItems={forceHideMenuItemsWithAdditions}
          additionalMenuItemOnTopRenderer={
            !isReadOnlyUser ? additionalMenuItemOnTopRenderer : undefined
          }
          additionalMenuItemRenderer={additionalMenuItemRenderer}
          onClickRenameMenuItem={renameMenuItemClickHandler}
          onClickDuplicateMenuItem={duplicateMenuItemClickHandler}
          onClickDeleteMenuItem={deleteMenuItemClickHandler}
        />
      )}
    </div>
  );
};

type PageControlsProps = CommonProps;

export const PageControls = memo((props: PageControlsProps): JSX.Element => {
  const { pageId, revisionId, shareLinkId, ...rest } = props;

  const { data: pageInfo, error } = useSWRxPageInfo(
    pageId ?? null,
    shareLinkId,
  );
  const { data: tagsInfoData } = useSWRxTagsInfo(pageId);
  const { open: openTagEditModal } = useTagEditModalActions();

  const onClickEditTagsButton = useCallback(() => {
    if (tagsInfoData == null || pageId == null || revisionId == null) {
      return;
    }
    openTagEditModal(tagsInfoData.tags, pageId, revisionId);
  }, [pageId, revisionId, tagsInfoData, openTagEditModal]);

  if (error != null) {
    return <></>;
  }

  return (
    <PageControlsSubstance
      pageInfo={pageInfo}
      pageId={pageId}
      revisionId={revisionId}
      onClickEditTagsButton={onClickEditTagsButton}
      {...rest}
    />
  );
});