import { mount, shallowMount } from '@vue/test-utils';
import MockAdapter from 'axios-mock-adapter';
import axios from '~/lib/utils/axios_utils';
import Container from '~/environments/components/container.vue';
import EmptyState from '~/environments/components/empty_state.vue';
import EnvironmentsApp from '~/environments/components/environments_app.vue';
import { environment, folder } from './mock_data';

describe('Environment', () => {
  let mock;
  let wrapper;

  const mockData = {
    endpoint: 'environments.json',
    canCreateEnvironment: true,
    canReadEnvironment: true,
    newEnvironmentPath: 'environments/new',
    helpPagePath: 'help',
    canaryDeploymentFeatureId: 'canary_deployment',
    showCanaryDeploymentCallout: true,
    userCalloutsPath: '/callouts',
    lockPromotionSvgPath: '/assets/illustrations/lock-promotion.svg',
    helpCanaryDeploymentsPath: 'help/canary-deployments',
  };

  const mockRequest = (response, body) => {
    mock.onGet(mockData.endpoint).reply(response, body, {
      'X-nExt-pAge': '2',
      'x-page': '1',
      'X-Per-Page': '1',
      'X-Prev-Page': '',
      'X-TOTAL': '37',
      'X-Total-Pages': '2',
    });
  };

  const createWrapper = (shallow = false) => {
    const fn = shallow ? shallowMount : mount;
    wrapper = fn(EnvironmentsApp, { propsData: mockData });
    return axios.waitForAll();
  };

  beforeEach(() => {
    mock = new MockAdapter(axios);
  });

  afterEach(() => {
    wrapper.destroy();
    mock.restore();
  });

  describe('successful request', () => {
    describe('without environments', () => {
      beforeEach(() => {
        mockRequest(200, { environments: [] });
        return createWrapper();
      });

      it('should render the empty state', () => {
        expect(wrapper.find(EmptyState).exists()).toBe(true);
      });

      describe('when it is possible to enable a review app', () => {
        beforeEach(() => {
          mockRequest(200, { environments: [], review_app: { can_setup_review_app: true } });
          return createWrapper();
        });

        it('should render the enable review app button', () => {
          expect(wrapper.find('.js-enable-review-app-button').text()).toContain(
            'Enable review app',
          );
        });
      });
    });

    describe('with paginated environments', () => {
      const environmentList = [environment];

      beforeEach(() => {
        mockRequest(200, {
          environments: environmentList,
          stopped_count: 1,
          available_count: 0,
        });
        return createWrapper();
      });

      it('should render a conatiner table with environments', () => {
        const containerTable = wrapper.find(Container);

        expect(containerTable.exists()).toBe(true);
        expect(containerTable.props('environments').length).toEqual(environmentList.length);
        expect(containerTable.find('.environment-name').text()).toEqual(environmentList[0].name);
      });

      describe('pagination', () => {
        it('should render pagination', () => {
          expect(wrapper.findAll('.gl-pagination li').length).toEqual(9);
        });

        it('should make an API request when page is clicked', () => {
          jest.spyOn(wrapper.vm, 'updateContent').mockImplementation(() => {});

          wrapper.find('.gl-pagination li:nth-child(3) .page-link').trigger('click');
          expect(wrapper.vm.updateContent).toHaveBeenCalledWith({ scope: 'available', page: '2' });
        });

        it('should make an API request when using tabs', () => {
          jest.spyOn(wrapper.vm, 'updateContent').mockImplementation(() => {});
          wrapper.find('.js-environments-tab-stopped').trigger('click');
          expect(wrapper.vm.updateContent).toHaveBeenCalledWith({ scope: 'stopped', page: '1' });
        });
      });
    });
  });

  describe('unsuccessful request', () => {
    beforeEach(() => {
      mockRequest(500, {});
      return createWrapper();
    });

    it('should render empty state', () => {
      expect(wrapper.find(EmptyState).exists()).toBe(true);
    });
  });

  describe('expandable folders', () => {
    beforeEach(() => {
      mockRequest(200, {
        environments: [folder],
        stopped_count: 1,
        available_count: 0,
      });

      mock.onGet(environment.folder_path).reply(200, { environments: [environment] });

      return createWrapper().then(() => {
        // open folder
        wrapper.find('.folder-name').trigger('click');
        return axios.waitForAll();
      });
    });

    it('should open a closed folder', () => {
      expect(wrapper.find('.folder-icon.ic-chevron-right').exists()).toBe(false);
    });

    it('should close an opened folder', () => {
      expect(wrapper.find('.folder-icon.ic-chevron-down').exists()).toBe(true);

      // close folder
      wrapper.find('.folder-name').trigger('click');
      wrapper.vm.$nextTick(() => {
        expect(wrapper.find('.folder-icon.ic-chevron-down').exists()).toBe(false);
      });
    });

    it('should show children environments', () => {
      expect(wrapper.findAll('.js-child-row').length).toEqual(1);
    });

    it('should show a button to show all environments', () => {
      expect(wrapper.find('.text-center > a.btn').text()).toContain('Show all');
    });
  });
});