/*
 * 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 {ConnectorClient as Client} from '@openstapps/api/lib/connectorClient';
import {SCMessage, SCThingOriginType, SCThingType} from '@openstapps/core';

export class MinimalConnector {
  // Data is mocked inside of getItems()
  private items: SCMessage[] = [];

  /**
   * Provides "fetched" items (e.g. messages)
   * 
   * @returns {Promise<SCMessage[]>}
   * @memberof MinimalConnector
   */
  async getItems(): Promise<SCMessage[]> {
    // reset items
    this.items.length = 0;

    // sample items (messages) "fetched" from some source
    const importedItems: SCMessage[] = [
      {
        audiences: ['students', 'employees'],
        description: 'Some description 1' ,
        message: 'Some message 1',
        name: 'Some name 1',
        origin: {
          indexed: (new Date()).toISOString(),
          name: 'minimal connector',
          type: SCThingOriginType.Remote,
        },
        type: SCThingType.Message,
        uid: '',
      },
      {
        audiences: ['students', 'employees'],
        description: 'Some description 2',
        message: 'Some message 2',
        name: 'Some name 2',
        origin: {
          indexed: (new Date()).toISOString(),
          name: 'minimal connector',
          type: SCThingOriginType.Remote,
        },
        type: SCThingType.Message,
        uid: '',
      },
      {
        audiences: ['students', 'employees'],
        description: 'Some description 3',
        message: 'Some message 3',
        name: 'Some name 3',
        origin: {
          indexed: (new Date()).toISOString(),
          name: 'minimal connector',
          type: SCThingOriginType.Remote,
        },
        type: SCThingType.Message,
        uid: '',
      },
    ];

    // create a universally unique identifier for each item
    for (const item of importedItems) {
      // each uid is generated by a string and the namespace id of your university
      item.uid = Client.makeUUID(JSON.stringify(item), 'f-u');
      this.items.push(item);
    }

    return this.items;
  }
}