import L from 'leaflet';
import marker2x from 'leaflet/dist/images/marker-icon-2x.png';
import marker from 'leaflet/dist/images/marker-icon.png';
import markerShadow from 'leaflet/dist/images/marker-shadow.png';
import {
  stateFlagTimeout as stateFlagTimeoutFactory,
  determineOrderDir,
  fixLeafletIcons,
  rangeOf,
  roundTen,
} from '../../src/utils/utils';

describe('utils', () => {
  describe('stateFlagTimeout', () => {
    it('sets state and initializes timeout with provided delay', () => {
      const setTimeout = jest.fn((callback) => callback());
      const setState = jest.fn();
      const stateFlagTimeout = stateFlagTimeoutFactory(setTimeout);
      const delay = 5000;

      stateFlagTimeout(setState, 'foo', false, delay);

      expect(setState).toHaveBeenCalledTimes(2);
      expect(setState).toHaveBeenNthCalledWith(1, { foo: false });
      expect(setState).toHaveBeenNthCalledWith(2, { foo: true });
      expect(setTimeout).toHaveBeenCalledTimes(1);
      expect(setTimeout).toHaveBeenCalledWith(expect.anything(), delay);
    });
  });

  describe('determineOrderDir', () => {
    it('returns ASC when current order field and selected field are different', () => {
      expect(determineOrderDir('foo', 'bar')).toEqual('ASC');
      expect(determineOrderDir('bar', 'foo')).toEqual('ASC');
    });

    it('returns ASC when no current order dir is provided', () => {
      expect(determineOrderDir('foo', 'foo')).toEqual('ASC');
      expect(determineOrderDir('bar', 'bar')).toEqual('ASC');
    });

    it('returns DESC when current order field and selected field are equal and current order dir is ASC', () => {
      expect(determineOrderDir('foo', 'foo', 'ASC')).toEqual('DESC');
      expect(determineOrderDir('bar', 'bar', 'ASC')).toEqual('DESC');
    });

    it('returns undefined when current order field and selected field are equal and current order dir is DESC', () => {
      expect(determineOrderDir('foo', 'foo', 'DESC')).toBeUndefined();
      expect(determineOrderDir('bar', 'bar', 'DESC')).toBeUndefined();
    });
  });

  describe('fixLeafletIcons', () => {
    it('updates icons used by leaflet', () => {
      fixLeafletIcons();

      const { iconRetinaUrl, iconUrl, shadowUrl } = L.Icon.Default.prototype.options;

      expect(iconRetinaUrl).toEqual(marker2x);
      expect(iconUrl).toEqual(marker);
      expect(shadowUrl).toEqual(markerShadow);
    });
  });

  describe('rangeOf', () => {
    const func = (i) => `result_${i}`;
    const size = 5;

    it('builds a range of specified size invike provided function', () => {
      expect(rangeOf(size, func)).toEqual([
        'result_1',
        'result_2',
        'result_3',
        'result_4',
        'result_5',
      ]);
    });

    it('builds a range starting at provided pos', () => {
      const startAt = 3;

      expect(rangeOf(size, func, startAt)).toEqual([
        'result_3',
        'result_4',
        'result_5',
      ]);
    });
  });

  describe('roundTen', () => {
    it('rounds provided number to the next multiple of ten', () => {
      const expectationsPairs = [
        [ 10, 10 ],
        [ 12, 20 ],
        [ 158, 160 ],
        [ 5, 10 ],
        [ -42, -40 ],
      ];

      expect.assertions(expectationsPairs.length);
      expectationsPairs.forEach(([ number, expected ]) => {
        expect(roundTen(number)).toEqual(expected);
      });
    });
  });
});