import { GlLink, GlModal } from '@gitlab/ui';
import { shallowMount, mount } from '@vue/test-utils';
import Vue from 'vue';
import merge from 'lodash/merge';
import Vuex from 'vuex';
import MetricsImage from 'ee/issues/show/components/incidents/metrics_image.vue';
import createStore from 'ee/issues/show/components/incidents/store';
import waitForPromises from 'helpers/wait_for_promises';

const defaultProps = {
  id: 1,
  filePath: 'test_file_path',
  filename: 'test_file_name',
};

const mockEvent = { preventDefault: jest.fn() };

Vue.use(Vuex);

describe('Metrics upload item', () => {
  let wrapper;
  let store;

  const mountComponent = (options = {}, mountMethod = mount) => {
    store = createStore();

    wrapper = mountMethod(
      MetricsImage,
      merge(
        {
          store,
          propsData: {
            ...defaultProps,
          },
          provide: { canUpdate: true },
        },
        options,
      ),
    );
  };

  afterEach(() => {
    if (wrapper) {
      wrapper.destroy();
      wrapper = null;
    }
  });

  const findImageLink = () => wrapper.findComponent(GlLink);
  const findLabelTextSpan = () => wrapper.find('[data-testid="metric-image-label-span"]');
  const findCollapseButton = () => wrapper.find('[data-testid="collapse-button"]');
  const findMetricImageBody = () => wrapper.find('[data-testid="metric-image-body"]');
  const findModal = () => wrapper.findComponent(GlModal);
  const findEditModal = () => wrapper.find('[data-testid="metric-image-edit-modal"]');
  const findDeleteButton = () => wrapper.find('[data-testid="delete-button"]');
  const findEditButton = () => wrapper.find('[data-testid="edit-button"]');
  const findImageTextInput = () => wrapper.find('[data-testid="metric-image-text-field"]');
  const findImageUrlInput = () => wrapper.find('[data-testid="metric-image-url-field"]');

  const closeModal = () => findModal().vm.$emit('hidden');
  const submitModal = () => findModal().vm.$emit('primary', mockEvent);
  const deleteImage = () => findDeleteButton().vm.$emit('click');
  const closeEditModal = () => findEditModal().vm.$emit('hidden');
  const submitEditModal = () => findEditModal().vm.$emit('primary', mockEvent);
  const editImage = () => findEditButton().vm.$emit('click');

  it('render the metrics image component', () => {
    mountComponent({}, shallowMount);

    expect(wrapper.element).toMatchSnapshot();
  });

  it('shows a link with the correct url', () => {
    const testUrl = 'test_url';
    mountComponent({ propsData: { url: testUrl } });

    expect(findImageLink().attributes('href')).toBe(testUrl);
    expect(findImageLink().text()).toBe(defaultProps.filename);
  });

  it('shows a link with the url text, if url text is present', () => {
    const testUrl = 'test_url';
    const testUrlText = 'test_url_text';
    mountComponent({ propsData: { url: testUrl, urlText: testUrlText } });

    expect(findImageLink().attributes('href')).toBe(testUrl);
    expect(findImageLink().text()).toBe(testUrlText);
  });

  it('shows the url text with no url, if no url is present', () => {
    const testUrlText = 'test_url_text';
    mountComponent({ propsData: { urlText: testUrlText } });

    expect(findLabelTextSpan().text()).toBe(testUrlText);
  });

  describe('expand and collapse', () => {
    beforeEach(() => {
      mountComponent();
    });

    it('the card is expanded by default', () => {
      expect(findMetricImageBody().isVisible()).toBe(true);
    });

    it('the card is collapsed when clicked', async () => {
      findCollapseButton().trigger('click');

      await waitForPromises();

      expect(findMetricImageBody().isVisible()).toBe(false);
    });
  });

  describe('delete functionality', () => {
    it('should open the delete modal when clicked', async () => {
      mountComponent({ stubs: { GlModal: true } });

      deleteImage();

      await waitForPromises();

      expect(findModal().attributes('visible')).toBe('true');
    });

    describe('when the modal is open', () => {
      beforeEach(() => {
        mountComponent(
          {
            data() {
              return { modalVisible: true };
            },
          },
          shallowMount,
        );
      });

      it('should close the modal when cancelled', async () => {
        closeModal();

        await waitForPromises();

        expect(findModal().attributes('visible')).toBeFalsy();
      });

      it('should delete the image when selected', async () => {
        const dispatchSpy = jest.spyOn(store, 'dispatch').mockImplementation(jest.fn());

        submitModal();

        await waitForPromises();

        expect(dispatchSpy).toHaveBeenCalledWith('deleteImage', defaultProps.id);
      });
    });

    describe('canUpdate permission', () => {
      it('delete button is hidden when user lacks update permissions', () => {
        mountComponent({ provide: { canUpdate: false } });

        expect(findDeleteButton().exists()).toBe(false);
      });
    });
  });

  describe('edit functionality', () => {
    it('should open the delete modal when clicked', async () => {
      mountComponent({ stubs: { GlModal: true } });

      editImage();

      await waitForPromises();

      expect(findEditModal().attributes('visible')).toBe('true');
    });

    describe('when the modal is open', () => {
      beforeEach(() => {
        mountComponent({
          data() {
            return { editModalVisible: true };
          },
          propsData: { urlText: 'test' },
          stubs: { GlModal: true },
        });
      });

      it('should close the modal when cancelled', async () => {
        closeEditModal();

        await waitForPromises();

        expect(findEditModal().attributes('visible')).toBeFalsy();
      });

      it('should delete the image when selected', async () => {
        const dispatchSpy = jest.spyOn(store, 'dispatch').mockImplementation(jest.fn());

        submitEditModal();

        await waitForPromises();

        expect(dispatchSpy).toHaveBeenCalledWith('updateImage', {
          imageId: defaultProps.id,
          url: null,
          urlText: 'test',
        });
      });

      it('should clear edits when the modal is closed', async () => {
        await findImageTextInput().setValue('test value');
        await findImageUrlInput().setValue('http://www.gitlab.com');

        expect(findImageTextInput().element.value).toBe('test value');
        expect(findImageUrlInput().element.value).toBe('http://www.gitlab.com');

        closeEditModal();

        await waitForPromises();

        editImage();

        await waitForPromises();

        expect(findImageTextInput().element.value).toBe('test');
        expect(findImageUrlInput().element.value).toBe('');
      });
    });
  });
});