// -- 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 {wpServicesModule} from '../../../angular-modules.ts';
import {WorkPackageResourceInterface} from '../../api/api-v3/hal-resources/work-package-resource.service';

export class WpAttachmentsService {
  public attachments:File[] = [];

  constructor(protected $q:ng.IQService,
              protected $timeout:ng.ITimeoutService,
              protected $http:ng.IHttpService,
              protected Upload,
              protected I18n,
              protected NotificationsService) {
  }

  public upload(workPackage:WorkPackageResourceInterface, files:File[]):ng.IPromise<any> {
    const uploadPath:string = workPackage.attachments.href;
    const uploads = _.map(files, (file:File) => {
      var options:Object = {
        fields: {
          metadata: {
            description: (file as any).description,
            fileName: file.name,
          }
        },
        file: file,
        url: uploadPath
      };
      return this.Upload.upload(options);
    });

    // notify the user
    const message = this.I18n.t('js.label_upload_notification', {
      id: workPackage.id,
      subject: workPackage.subject
    });

    const notification = this.NotificationsService.addWorkPackageUpload(message, uploads);
    const allUploadsDone = this.$q.defer();
    this.$q.all(uploads).then(() => {
      this.$timeout(() => { // let the notification linger for a bit
        this.NotificationsService.remove(notification);
        allUploadsDone.resolve();
      }, 700);
    }, function (err) {
      allUploadsDone.reject(err);
    });
    return allUploadsDone.promise;
  }

  public load(workPackage:WorkPackageResourceInterface,
              reload:boolean = false):ng.IPromise<any[]> {
    const loadedAttachments = this.$q.defer();

    const path:string = workPackage.attachments.href;
    this.$http.get(path, {cache: !reload})
      .success((response:any) => {
        _.remove(this.attachments);
        _.extend(this.attachments, response.elements);
        loadedAttachments.resolve(this.attachments);
      })
      .error(err => {
        loadedAttachments.reject(err);
      });

    return loadedAttachments.promise;
  };

  public remove(fileOrAttachment:any):void {
    if (fileOrAttachment._type === 'Attachment') {
      const path:string = fileOrAttachment.href;

      this.$http.delete(path)
        .success(() => {
          _.remove(this.attachments, fileOrAttachment);
        });
    } else {
      // pending attachment
      _.remove(this.attachments, fileOrAttachment);
    }
  };

  public hasAttachments(workPackage:WorkPackageResourceInterface):ng.IPromise<boolean> {
    return this.load(workPackage).then((attachments:any) => {
      return attachments.length > 0;
    });
  };

  public getCurrentAttachments():any[] {
    return this.attachments;
  };

  public resetAttachmentsList():void {
    this.attachments.length = 0;
  };

  // not in use until furinvaders create is merged
  public uploadPendingAttachments = (wp:WorkPackageResourceInterface):ng.IPromise<any> => {
    if (angular.isDefined(wp) && this.attachments.length > 0) {
      return this.upload(wp, this.attachments);
    }
  }
}

wpServicesModule.service('wpAttachments', WpAttachmentsService);