// -- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// 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; either version 2
// of the License, or (at your option) any later version.
//
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
// ++

import {opWorkPackagesModule} from '../../../angular-modules';
import {ActivityEntryInfo} from './activity-entry-info';


export class WorkPackagesActivityService {

  constructor(public ConfigurationService,
              public $filter,
              public $q) {
  }

  public get order() {
    return this.isReversed ? 'desc' : 'asc';
  }

  public get isReversed() {
    return this.ConfigurationService.commentsSortedInDescendingOrder();
  }

  /**
   * Aggregate user and revision activities for the given work package resource.
   * Resolves both promises and returns a sorted list of activities
   * whose order depends on the 'commentsSortedInDescendingOrder' property.
   */
  public aggregateActivities(workPackage):any[] {
    var aggregated = [], promises = [];

    var add = function (data) {
      aggregated.push(data.elements);
    };

    promises.push(workPackage.activities.$load().then(add));

    if (workPackage.revisions) {
      promises.push(workPackage.revisions.$load().then(add));
    }

    return this.$q.all(promises).then(() => {
      return this.$filter('orderBy')(
        _.flatten(aggregated),
        'createdAt',
        this.isReversed
      );
    });
  }

  public info(activities, activity, index) {
    return new ActivityEntryInfo(this.$filter, this.isReversed, activities, activity, index);
  };
}

opWorkPackagesModule.service('wpActivity', WorkPackagesActivityService);