import type React from 'react';
import type { FC } from 'react';
import { useCallback, useRef, useState } from 'react';
import { LoadingSpinner } from '@growi/ui/dist/components';
import { format } from 'date-fns/format';
import { useAtomValue } from 'jotai';
import { useTranslation } from 'react-i18next';

import type { IClearable } from '~/client/interfaces/clearable';
import { toastError } from '~/client/util/toastr';
import type { SupportedActionType } from '~/interfaces/activity';
import { useGrowiAppIdForGrowiCloud, useGrowiCloudUri } from '~/states/global';
import {
  auditLogAvailableActionsAtom,
  auditLogEnabledAtom,
} from '~/states/server-configurations';
import { useSWRxActivity } from '~/stores/activity';

import PaginationWrapper from '../PaginationWrapper';
import { ActivityTable } from './AuditLog/ActivityTable';
import { AuditLogDisableMode } from './AuditLog/AuditLogDisableMode';
import { AuditLogExportModal } from './AuditLog/AuditLogExportModal';
import { AuditLogSettings } from './AuditLog/AuditLogSettings';
import { DateRangePicker } from './AuditLog/DateRangePicker';
import { SearchUsernameTypeahead } from './AuditLog/SearchUsernameTypeahead';
import { SelectActionDropdown } from './AuditLog/SelectActionDropdown';

const formatDate = (date: Date | null) => {
  if (date == null) {
    return '';
  }
  return format(new Date(date), 'yyyy-MM-dd');
};

const PAGING_LIMIT = 10;

export const AuditLogManagement: FC = () => {
  const { t } = useTranslation('admin');

  const growiCloudUri = useGrowiCloudUri();
  const growiAppIdForGrowiCloud = useGrowiAppIdForGrowiCloud();

  const isCloud = growiCloudUri != null && growiAppIdForGrowiCloud != null;

  const typeaheadRef = useRef<IClearable>(null);

  const auditLogAvailableActionsData = useAtomValue(
    auditLogAvailableActionsAtom,
  );

  /*
   * State
   */
  const [isSettingPage, setIsSettingPage] = useState<boolean>(false);
  const [activePageNumber, setActivePageNumber] = useState<number>(1);
  const [jumpPageNumber, setJumpPageNumber] = useState<number>(1);
  const offset = (activePageNumber - 1) * PAGING_LIMIT;
  const [startDate, setStartDate] = useState<Date | null>(null);
  const [endDate, setEndDate] = useState<Date | null>(null);
  const [selectedUsernames, setSelectedUsernames] = useState<string[]>([]);
  const [actionMap, setActionMap] = useState(
    new Map<SupportedActionType, boolean>(
      auditLogAvailableActionsData != null
        ? auditLogAvailableActionsData.map((action) => [action, true])
        : [],
    ),
  );

  /*
   * Fetch
   */
  const selectedDate = {
    startDate: formatDate(startDate),
    endDate: formatDate(endDate),
  };
  const selectedActionList = Array.from(actionMap.entries())
    .filter((v) => v[1])
    .map((v) => v[0]);
  const searchFilter = {
    actions: selectedActionList,
    dates: selectedDate,
    usernames: selectedUsernames,
  };

  const {
    data: activityData,
    mutate: mutateActivity,
    error,
  } = useSWRxActivity(PAGING_LIMIT, offset, searchFilter);
  const activityList = activityData?.docs != null ? activityData.docs : [];
  const totalActivityNum =
    activityData?.totalDocs != null ? activityData.totalDocs : 0;
  const totalPagingPages =
    activityData?.totalPages != null ? activityData.totalPages : 0;
  const isLoading = activityData === undefined && error == null;

  if (error != null) {
    toastError('Failed to get Audit Log');
  }

  const auditLogEnabled = useAtomValue(auditLogEnabledAtom);

  /*
   * Functions
   */
  const setActivePageHandler = useCallback((selectedPageNum: number) => {
    setActivePageNumber(selectedPageNum);
  }, []);

  const datePickerChangedHandler = useCallback((dateList: Date[] | null[]) => {
    setActivePageNumber(1);
    setStartDate(dateList[0]);
    setEndDate(dateList[1]);
  }, []);

  const actionCheckboxChangedHandler = useCallback(
    (action: SupportedActionType) => {
      setActivePageNumber(1);
      actionMap.set(action, !actionMap.get(action));
      setActionMap(new Map(actionMap.entries()));
    },
    [actionMap],
  );

  const multipleActionCheckboxChangedHandler = useCallback(
    (actions: SupportedActionType[], isChecked) => {
      setActivePageNumber(1);
      actions.forEach((action) => {
        actionMap.set(action, isChecked);
      });
      setActionMap(new Map(actionMap.entries()));
    },
    [actionMap],
  );

  const setUsernamesHandler = useCallback((usernames: string[]) => {
    setActivePageNumber(1);
    setSelectedUsernames(usernames);
  }, []);

  const clearButtonPushedHandler = useCallback(() => {
    setActivePageNumber(1);
    setStartDate(null);
    setEndDate(null);
    setSelectedUsernames([]);
    typeaheadRef.current?.clear();

    if (auditLogAvailableActionsData != null) {
      setActionMap(
        new Map<SupportedActionType, boolean>(
          auditLogAvailableActionsData.map((action) => [action, true]),
        ),
      );
    }
  }, [auditLogAvailableActionsData]);

  const reloadButtonPushedHandler = useCallback(() => {
    setActivePageNumber(1);
    mutateActivity();
  }, [mutateActivity]);

  const jumpPageInputChangeHandler = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      const inputNumber = Number(e.target.value);
      const isNan = Number.isNaN(inputNumber);

      if (!isNan) {
        const jumpPageNumber =
          inputNumber > totalPagingPages
            ? totalPagingPages
            : inputNumber <= 0
              ? activePageNumber
              : inputNumber;
        setJumpPageNumber(jumpPageNumber);
      } else {
        setJumpPageNumber(activePageNumber);
      }
    },
    [totalPagingPages, activePageNumber],
  );

  const jumpPageInputKeyDownHandler = useCallback(
    (e) => {
      if (e.key === 'Enter') {
        setActivePageNumber(jumpPageNumber);
      }
    },
    [jumpPageNumber],
  );

  const jumpPageButtonPushedHandler = useCallback(() => {
    setActivePageNumber(jumpPageNumber);
  }, [jumpPageNumber]);

  const [isExportModalOpen, setIsExportModalOpen] = useState<boolean>(false);

  const startIndex = activityList.length === 0 ? 0 : offset + 1;
  const endIndex = activityList.length === 0 ? 0 : offset + activityList.length;

  if (!auditLogEnabled) {
    return <AuditLogDisableMode />;
  }

  return (
    <div data-testid="admin-auditlog">
      <button
        type="button"
        className="btn btn-outline-secondary mb-4"
        onClick={() => setIsSettingPage(!isSettingPage)}
      >
        {isSettingPage ? (
          <>
            <span className="material-symbols-outlined">arrow_left_alt</span>
            {t('admin:audit_log_management.return')}
          </>
        ) : (
          <>
            <span className="material-symbols-outlined">settings</span>
            {t('admin:audit_log_management.settings')}
          </>
        )}
      </button>

      {isCloud && (
        <a
          href={`${growiCloudUri}/my/apps/${growiAppIdForGrowiCloud}`}
          className="btn btn-outline-secondary mb-4 ms-2"
        >
          <span className="material-symbols-outlined me-1">share</span>
          {t('cloud_setting_management.to_cloud_settings')}
        </a>
      )}

      <h2 className="admin-setting-header mb-3">
        <span>
          {isSettingPage
            ? t('audit_log_management.audit_log_settings')
            : t('audit_log_management.audit_log')}
        </span>
        {!isSettingPage && (
          <button
            type="button"
            className="btn btn-sm ms-auto grw-btn-reload"
            onClick={reloadButtonPushedHandler}
          >
            <span className="material-symbols-outlined">refresh</span>
          </button>
        )}
      </h2>

      {isSettingPage ? (
        <AuditLogSettings />
      ) : (
        <>
          <div className="row row-cols-lg-auto mb-3 g-3">
            <div className="col-12">
              <SearchUsernameTypeahead
                ref={typeaheadRef}
                onChange={setUsernamesHandler}
              />
            </div>

            <div className="col-12">
              <DateRangePicker
                startDate={startDate}
                endDate={endDate}
                onChange={datePickerChangedHandler}
              />
            </div>

            <div className="col-12">
              <SelectActionDropdown
                actionMap={actionMap}
                availableActions={auditLogAvailableActionsData || []}
                onChangeAction={actionCheckboxChangedHandler}
                onChangeMultipleAction={multipleActionCheckboxChangedHandler}
              />
            </div>

            <div className="col-12">
              <button
                type="button"
                className="btn btn-link"
                onClick={clearButtonPushedHandler}
              >
                {t('admin:audit_log_management.clear')}
              </button>
            </div>

            <div className="col-12">
              <button
                type="button"
                className="btn btn-outline-secondary"
                onClick={() => setIsExportModalOpen(true)}
              >
                <span className="material-symbols-outlined me-1">download</span>
                {t('admin:audit_log_management.export')}
              </button>
            </div>
          </div>

          <p className="ms-2">
            <strong>{startIndex}</strong> - <strong>{endIndex}</strong> of{' '}
            <strong>{totalActivityNum}</strong>
          </p>

          {isLoading ? (
            <div className="text-muted text-center mb-5">
              <LoadingSpinner className="me-1 fs-3" />
            </div>
          ) : (
            <ActivityTable activityList={activityList} />
          )}

          <div className="d-flex flex-row justify-content-center">
            <PaginationWrapper
              activePage={activePageNumber}
              changePage={setActivePageHandler}
              totalItemsCount={totalActivityNum}
              pagingLimit={PAGING_LIMIT}
              align="center"
              size="sm"
            />

            <div className="admin-audit-log ms-3">
              <label
                htmlFor="jumpPageInput"
                className="form-label me-1 text-secondary"
              >
                Jump To Page
              </label>
              <input
                id="jumpPageInput"
                type="text"
                className="jump-page-input"
                onChange={jumpPageInputChangeHandler}
                onKeyDown={jumpPageInputKeyDownHandler}
              />
              <button
                className="btn btn-sm"
                type="button"
                onClick={jumpPageButtonPushedHandler}
              >
                <b>Go</b>
              </button>
            </div>
          </div>

          <AuditLogExportModal
            isOpen={isExportModalOpen}
            onClose={() => setIsExportModalOpen(false)}
            initialStartDate={startDate}
            initialEndDate={endDate}
            initialSelectedUsernames={selectedUsernames}
            initialActionMap={actionMap}
          />
        </>
      )}
    </div>
  );
};