import { Event } from '@sanar/payments-sdk';
import { HttpRequestService } from './http.request.service';

require('dotenv/config');

export class SubscriptionsService {
  private static instance: SubscriptionsService;

  private httpService: HttpRequestService;

  constructor() {
    this.httpService = new HttpRequestService(
      process.env.SUBSCRIPTIONS_URL,
    );
  }

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

    return SubscriptionsService.instance;
  }

  async listCustomerSubscriptions(customer_id: number | string) : Promise<Event.Subscription[]> {
    const result = await this.httpService.get('/subscriptions', {
      params: {
        where: {
          customer_id,
          platform: 'resmed',
        },
      },
    });

    if (!(result.data.subscriptions?.length > 0)) {
      throw new Error('Customer not found');
    }

    const compare = (a, b) => {
      if (a.created_at > b.created_at) return -1;
      if (a.created_at < b.created_at) return 1;
      return 0;
    };

    return result.data.subscriptions.sort(compare);
  }

  async findSubscriptions(filter: any = {}) {
    const result = await this.httpService.get('/subscriptions', {
      params: filter,
    });

    const { data } = result;
    if (data && data.subscriptions) {
      return data.subscriptions;
    }

    return [];
  }
}