/*
 * Copyright (C) 2018 StApps
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <https://www.gnu.org/licenses/>.
 */
import {Api} from '@openstapps/gitlab-api';
import {asyncPool} from 'async-pool-native/dist/async-pool';
import {flatten2dArray, logger} from '../common';
import {GROUPS, NOTE_PREFIX} from '../configuration';

/**
 * Remove label `meeting` from closed issues
 *
 * @param api Instance of GitLabAPI to send requests with
 */
export async function unlabel(api: Api) {
  const issueResults = await asyncPool(3, GROUPS, (groupId) => {
    return api.getIssues({
      groupId: groupId,
      state: 'closed',
    });
  });

  const issues = flatten2dArray(issueResults);

  logger.log('Fetched ' + issues.length + ' closed issue(s).');

  await asyncPool(1, issues, async (issue) => {
    if (issue.labels.indexOf('meeting') >= 0) {
      logger.info(`Issue ${issue.title} is closed and has label "meeting". Removing it.`);

      await api.createNote(
        issue.project_id,
        issue.iid,
        `${NOTE_PREFIX} Removed label \`meeting\` automatically.
/unlabel ~meeting`,
      );
    }
  });

  logger.ok('Label `meeting` has been removed from closed issues.');
}