import { 
  IconRefresh,
  IconUpload,
  IconDownload,
  IconDeviceFloppy,
  IconPlayerPlay,
  IconBolt,
  IconEraser,
  IconDots,
  IconEye
} from '@tabler/icons-react';
import PortalDropdown from './PortalDropdown.jsx';
import { IconClock } from '@tabler/icons-react';
import { formatDateTimeWithRelative } from '../lib/datetime.js';

function PageHeaderActions({
  loading = false,
  onPreview,
  disablePreview = false,
  onRefresh,
  disableRefresh = false,
  onImport,
  onExport,
  disableExport = false,
  onClear,
  disableClear = false,
  onClearCommunities,
  disableClearCommunities = false,
  onSave,
  disableSave = false,
  onHistory,
  lastModified,
  onOnlineUpdate,
  onBackgroundUpdate,
}) {
  const secondaryButtons = Boolean(onPreview || onImport || onExport || onClear || onClearCommunities || onHistory);
  // Рендер плейсхолдеров во время загрузки/перезагрузки страницы
  if (loading) {
    const showUpdateGroup = Boolean(onBackgroundUpdate || onOnlineUpdate);
    const placeholderBtn = (width = 120) => (
      <span
        className="btn disabled placeholder me-2"
        style={{ height: 38, width }}
        aria-hidden="true"
      />
    );
    return (
      <div className="header-actions" role="toolbar" aria-label="Действия страницы (загрузка)">
        <div className="btn-group">
          {showUpdateGroup && (
            <div className="btn-group">
              {placeholderBtn(170)}
            </div>
          )}
        </div>
        <span className="vr d-none d-lg-inline" />
        <div className="btn-group">
          {onRefresh && placeholderBtn(120)}
          {(onImport || onExport) && placeholderBtn(160)}
          {onClear && placeholderBtn(130)}
          {onClearCommunities && placeholderBtn(180)}
          {onSave && placeholderBtn(140)}
          {onHistory && placeholderBtn(110)}
        </div>
      </div>
    );
  }
  return (
    <div className="header-actions" role="toolbar" aria-label="Действия страницы">
      <div className="btn-group">
        {(onBackgroundUpdate || onOnlineUpdate) && (
          <div className="btn-group">
            {/* Дефолтное действие — фоновое обновление */}
            <button 
              className="btn btn-outline-success" 
              type="button" 
              onClick={onBackgroundUpdate || onOnlineUpdate}
              title="Фоновое обновление BGP (POST)"
            >
              <IconPlayerPlay className="me-1" /> Фоновое обновление
            </button>
            {(onBackgroundUpdate && onOnlineUpdate) && (
              <PortalDropdown
                buttonClassName="btn btn-outline-success dropdown-toggle dropdown-toggle-split"
                buttonProps={{ 'aria-label': 'Другие варианты обновления' }}
                align="right"
                buttonContent={null}
              >
                <button className="dropdown-item" type="button" onClick={onBackgroundUpdate}>
                  <IconPlayerPlay className="me-1" /> Фоновое обновление
                </button>
                <button className="dropdown-item" type="button" onClick={onOnlineUpdate}>
                  <IconBolt className="me-1" /> Online-обновление
                </button>
              </PortalDropdown>
            )}
          </div>
        )}
      </div>
      <span className="vr d-none d-lg-inline" />
      <div className="btn-group d-none d-sm-inline-flex">
        {onPreview && (
          <button className="btn btn-outline-primary" type="button" onClick={onPreview} disabled={disablePreview} title="Предпросмотр изменений">
            <IconEye className="me-1" /> Предпросмотр
          </button>
        )}
        {onRefresh && (
          <button className="btn btn-outline-secondary" type="button" onClick={onRefresh} disabled={disableRefresh} title="Обновить данные">
            <IconRefresh className={loading ? 'spin me-1' : 'me-1'} /> Обновить
          </button>
        )}
        {(onImport || onExport) && (
          <div className="dropdown">
            <PortalDropdown
              buttonClassName="btn btn-outline-primary dropdown-toggle"
              buttonProps={{ title: 'Импорт/Экспорт' }}
              align="left"
              buttonContent={<><IconDownload className="me-1" /> Импорт/Экспорт</>}
            >
              {onImport && (
                <button className="dropdown-item" type="button" onClick={onImport}>
                  <IconUpload className="me-1" /> Импорт
                </button>
              )}
              {onExport && (
                <button className="dropdown-item" type="button" onClick={onExport} disabled={disableExport}>
                  <IconDownload className="me-1" /> Экспорт
                </button>
              )}
            </PortalDropdown>
          </div>
        )}
        {onClear && (
          <button className="btn btn-outline-secondary" type="button" onClick={onClear} disabled={disableClear} title="Очистить пустые/невалидные">
            Очистить
          </button>
        )}
        {onClearCommunities && (
          <button className="btn btn-outline-secondary" type="button" onClick={onClearCommunities} disabled={disableClearCommunities} title="Удалить все записи выбранного community">
            <IconEraser className="me-1" /> Очистить community
          </button>
        )}
        {onSave && (
          <button className="btn btn-primary" type="button" onClick={onSave} disabled={disableSave} title="Сохранить">
            {loading ? (
              <>
                <span className="spinner-border spinner-border-sm me-2" role="status"></span>
                Сохранение...
              </>
            ) : (
              <>
                <IconDeviceFloppy className="me-1" /> Сохранить
              </>
            )}
          </button>
        )}
        {onHistory && (
          <div className="btn-group">
            <button className="btn btn-outline-secondary" type="button" onClick={onHistory} title="История версий">История</button>
            {lastModified && (
              <button className="btn btn-outline-secondary" type="button" onClick={onHistory} title={`Последние изменения: ${formatDateTimeWithRelative(lastModified)}`}>
                <IconClock className="me-1" />
                <span className="d-none d-sm-inline">{formatDateTimeWithRelative(lastModified)}</span>
                <span className="d-inline d-sm-none">{formatDateTimeWithRelative(lastModified)}</span>
              </button>
            )}
          </div>
        )}
      </div>
      {/* Компактное меню для маленьких экранов */}
      {secondaryButtons && (
        <div className="btn-group d-inline-flex d-sm-none">
          <PortalDropdown
            buttonClassName="btn btn-outline-secondary"
            buttonProps={{ title: 'Ещё действия' }}
            align="left"
            buttonContent={<><IconDots className="me-1" /> Ещё</>}
          >
            {onPreview && (
              <button className="dropdown-item" type="button" onClick={onPreview} disabled={disablePreview}>
                <IconEye className="me-1" /> Предпросмотр
              </button>
            )}
            {onRefresh && (
              <button className="dropdown-item" type="button" onClick={onRefresh} disabled={disableRefresh}>
                <IconRefresh className="me-1" /> Обновить
              </button>
            )}
            {onImport && (
              <button className="dropdown-item" type="button" onClick={onImport}>
                <IconUpload className="me-1" /> Импорт
              </button>
            )}
            {onExport && (
              <button className="dropdown-item" type="button" onClick={onExport} disabled={disableExport}>
                <IconDownload className="me-1" /> Экспорт
              </button>
            )}
            {onClear && (
              <button className="dropdown-item" type="button" onClick={onClear} disabled={disableClear}>
                Очистить
              </button>
            )}
            {onClearCommunities && (
              <button className="dropdown-item" type="button" onClick={onClearCommunities} disabled={disableClearCommunities}>
                <IconEraser className="me-1" /> Очистить community
              </button>
            )}
            {onHistory && (
              <button className="dropdown-item" type="button" onClick={onHistory}>
                История
              </button>
            )}
          </PortalDropdown>
        </div>
      )}
    </div>
  );
}

export default PageHeaderActions;