import {Query} from 'history';
import cloneDeep from 'lodash/cloneDeep';
import pick from 'lodash/pick';

import {GlobalSelection} from 'app/types';
import {getUtcDateString} from 'app/utils/dates';
import EventView from 'app/utils/discover/eventView';

import {DashboardDetails, DisplayType, Widget, WidgetQuery} from './types';

export function cloneDashboard(dashboard: DashboardDetails): DashboardDetails {
  return cloneDeep(dashboard);
}

export function eventViewFromWidget(
  title: string,
  query: WidgetQuery,
  selection: GlobalSelection,
  widgetType?: DisplayType
): EventView {
  const {start, end, period: statsPeriod} = selection.datetime;
  const {projects, environments} = selection;

  // World Map requires an additional column (geo.country_code) to display in discover when navigating from the widget
  const fields =
    widgetType === DisplayType.WORLD_MAP
      ? ['geo.country_code', ...query.fields]
      : query.fields;
  const conditions =
    widgetType === DisplayType.WORLD_MAP
      ? `${query.conditions} has:geo.country_code`
      : query.conditions;

  return EventView.fromSavedQuery({
    id: undefined,
    name: title,
    version: 2,
    fields,
    query: conditions,
    orderby: query.orderby,
    projects,
    range: statsPeriod,
    start: start ? getUtcDateString(start) : undefined,
    end: end ? getUtcDateString(end) : undefined,
    environment: environments,
  });
}

function coerceStringToArray(value?: string | string[] | null) {
  return typeof value === 'string' ? [value] : value;
}

export function constructWidgetFromQuery(query?: Query): Widget | undefined {
  if (query) {
    const queryNames = coerceStringToArray(query.queryNames);
    const queryConditions = coerceStringToArray(query.queryConditions);
    const queryFields = coerceStringToArray(query.queryFields);
    const queries: WidgetQuery[] = [];
    if (
      queryConditions &&
      queryNames &&
      queryFields &&
      typeof query.queryOrderby === 'string'
    )
      queryConditions.forEach((condition, index) => {
        queries.push({
          name: queryNames[index],
          conditions: condition,
          fields: queryFields,
          orderby: query.queryOrderby as string,
        });
      });
    if (query.title && query.displayType && query.interval && queries.length > 0) {
      const newWidget: Widget = {
        ...(pick(query, ['title', 'displayType', 'interval']) as {
          title: string;
          displayType: DisplayType;
          interval: string;
        }),
        queries,
      };
      return newWidget;
    }
  }
  return undefined;
}