/**
 * sanarlink.service.ts
 * Copyright (C) 2021 Sanar
 *
 * @author Edgard Leal <edgard.leal@sanar.com>
 * @module sanarlink.service.ts
 */

import { HttpRequestService } from '../http.request.service';
import { SanarLinkResponse } from './SanarLinkResponse';
import { SanarLinkInput } from './TrialLinkInput';

const RESMED_URL = process.env.RESMED_URL || 'http://sanarmed.com/residenciamedica';

export class SanarLinkService {
  static instance: SanarLinkService;

  static getInstance(): SanarLinkService {
    if (!SanarLinkService.instance) {
      SanarLinkService.instance = new SanarLinkService();
    }
    return SanarLinkService.instance;
  }

  private httpClient: HttpRequestService;

  constructor() {
    this.httpClient = new HttpRequestService<SanarLinkResponse>(
      process.env.SANARLINK_URL,
    );
  }

  public async upsertLink(input: SanarLinkInput): Promise<string> {
    const url = `${RESMED_URL}/trial/${input.course_slug}?origin=tgt-${input.user_id}`;
    const response = await this.httpClient.get('/api.php', {
      params: {
        url,
      },
    });
    return response.url;
  }
}