import { Mock } from 'ts-mockery';
import reducer, {
  GET_OVERVIEW_START,
  GET_OVERVIEW_ERROR,
  GET_OVERVIEW,
  GetVisitsOverviewAction,
  VisitsOverview,
  loadVisitsOverview,
} from '../../../src/visits/reducers/visitsOverview';
import { CREATE_VISITS, CreateVisitsAction } from '../../../src/visits/reducers/visitCreation';
import ShlinkApiClient from '../../../src/api/services/ShlinkApiClient';
import { ShlinkVisitsOverview } from '../../../src/api/types';
import { ShlinkState } from '../../../src/container/types';
import { CreateVisit, OrphanVisit, Visit } from '../../../src/visits/types';

describe('visitsOverviewReducer', () => {
  describe('reducer', () => {
    const action = (type: string) =>
      Mock.of<GetVisitsOverviewAction>({ type }) as GetVisitsOverviewAction & CreateVisitsAction;
    const state = (payload: Partial<VisitsOverview> = {}) => Mock.of<VisitsOverview>(payload);

    it('returns loading on GET_OVERVIEW_START', () => {
      const { loading } = reducer(state({ loading: false, error: false }), action(GET_OVERVIEW_START));

      expect(loading).toEqual(true);
    });

    it('stops loading and returns error on GET_OVERVIEW_ERROR', () => {
      const { loading, error } = reducer(state({ loading: true, error: false }), action(GET_OVERVIEW_ERROR));

      expect(loading).toEqual(false);
      expect(error).toEqual(true);
    });

    it('return visits overview on GET_OVERVIEW', () => {
      const { loading, error, visitsCount } = reducer(
        state({ loading: true, error: false }),
        { type: GET_OVERVIEW, visitsCount: 100 } as unknown as GetVisitsOverviewAction & CreateVisitsAction,
      );

      expect(loading).toEqual(false);
      expect(error).toEqual(false);
      expect(visitsCount).toEqual(100);
    });

    it.each([
      [ 50, 53 ],
      [ 0, 3 ],
      [ undefined, 3 ],
    ])('returns updated amounts on CREATE_VISITS', (providedOrphanVisitsCount, expectedOrphanVisitsCount) => {
      const { visitsCount, orphanVisitsCount } = reducer(
        state({ visitsCount: 100, orphanVisitsCount: providedOrphanVisitsCount }),
        {
          type: CREATE_VISITS,
          createdVisits: [
            Mock.of<CreateVisit>({ visit: Mock.all<Visit>() }),
            Mock.of<CreateVisit>({ visit: Mock.all<Visit>() }),
            Mock.of<CreateVisit>({
              visit: Mock.of<OrphanVisit>({ visitedUrl: '' }),
            }),
            Mock.of<CreateVisit>({
              visit: Mock.of<OrphanVisit>({ visitedUrl: '' }),
            }),
            Mock.of<CreateVisit>({
              visit: Mock.of<OrphanVisit>({ visitedUrl: '' }),
            }),
          ],
        } as unknown as GetVisitsOverviewAction & CreateVisitsAction,
      );

      expect(visitsCount).toEqual(102);
      expect(orphanVisitsCount).toEqual(expectedOrphanVisitsCount);
    });
  });

  describe('loadVisitsOverview', () => {
    const buildApiClientMock = (returned: Promise<ShlinkVisitsOverview>) => Mock.of<ShlinkApiClient>({
      getVisitsOverview: jest.fn(async () => returned),
    });
    const dispatchMock = jest.fn();
    const getState = () => Mock.of<ShlinkState>();

    beforeEach(() => dispatchMock.mockReset());

    it('dispatches start and error when promise is rejected', async () => {
      const ShlinkApiClient = buildApiClientMock(Promise.reject());

      await loadVisitsOverview(() => ShlinkApiClient)()(dispatchMock, getState);

      expect(dispatchMock).toHaveBeenCalledTimes(2);
      expect(dispatchMock).toHaveBeenNthCalledWith(1, { type: GET_OVERVIEW_START });
      expect(dispatchMock).toHaveBeenNthCalledWith(2, { type: GET_OVERVIEW_ERROR });
      expect(ShlinkApiClient.getVisitsOverview).toHaveBeenCalledTimes(1);
    });

    it('dispatches start and success when promise is resolved', async () => {
      const resolvedOverview = Mock.of<ShlinkVisitsOverview>({ visitsCount: 50 });
      const shlinkApiClient = buildApiClientMock(Promise.resolve(resolvedOverview));

      await loadVisitsOverview(() => shlinkApiClient)()(dispatchMock, getState);

      expect(dispatchMock).toHaveBeenCalledTimes(2);
      expect(dispatchMock).toHaveBeenNthCalledWith(1, { type: GET_OVERVIEW_START });
      expect(dispatchMock).toHaveBeenNthCalledWith(2, { type: GET_OVERVIEW, visitsCount: 50 });
      expect(shlinkApiClient.getVisitsOverview).toHaveBeenCalledTimes(1);
    });
  });
});
