import { CurrentRateService } from '@ghostfolio/api/app/portfolio/current-rate.service';
import { ExchangeRateDataService } from '@ghostfolio/api/services/exchange-rate-data/exchange-rate-data.service';
import { parseDate } from '@ghostfolio/common/helper';

import Big from 'big.js';

import { CurrentRateServiceMock } from './current-rate.service.mock';
import { PortfolioCalculator } from './portfolio-calculator';

jest.mock('@ghostfolio/api/app/portfolio/current-rate.service', () => {
  return {
    // eslint-disable-next-line @typescript-eslint/naming-convention
    CurrentRateService: jest.fn().mockImplementation(() => {
      return CurrentRateServiceMock;
    })
  };
});

describe('PortfolioCalculator', () => {
  let currentRateService: CurrentRateService;
  let exchangeRateDataService: ExchangeRateDataService;

  beforeEach(() => {
    currentRateService = new CurrentRateService(null, null);

    exchangeRateDataService = new ExchangeRateDataService(
      null,
      null,
      null,
      null
    );
  });

  describe('get current positions', () => {
    it('with no orders', async () => {
      const portfolioCalculator = new PortfolioCalculator({
        currentRateService,
        exchangeRateDataService,
        currency: 'CHF',
        orders: []
      });

      portfolioCalculator.computeTransactionPoints();

      const spy = jest
        .spyOn(Date, 'now')
        .mockImplementation(() => parseDate('2021-12-18').getTime());

      const chartData = await portfolioCalculator.getChartData({
        start: new Date()
      });

      const currentPositions = await portfolioCalculator.getCurrentPositions(
        new Date()
      );

      const investments = portfolioCalculator.getInvestments();

      const investmentsByMonth = portfolioCalculator.getInvestmentsByGroup({
        data: chartData,
        groupBy: 'month'
      });

      spy.mockRestore();

      expect(currentPositions).toEqual({
        currentValue: new Big(0),
        grossPerformance: new Big(0),
        grossPerformancePercentage: new Big(0),
        grossPerformancePercentageWithCurrencyEffect: new Big(0),
        grossPerformanceWithCurrencyEffect: new Big(0),
        hasErrors: false,
        netPerformance: new Big(0),
        netPerformancePercentage: new Big(0),
        netPerformancePercentageWithCurrencyEffect: new Big(0),
        netPerformanceWithCurrencyEffect: new Big(0),
        positions: [],
        totalInvestment: new Big(0)
      });

      expect(investments).toEqual([]);

      expect(investmentsByMonth).toEqual([]);
    });
  });
});