import { mount } from '@vue/test-utils';
import SnippetBlobView from '~/snippets/components/snippet_blob_view.vue';
import BlobHeader from '~/blob/components/blob_header.vue';
import BlobEmbeddable from '~/blob/components/blob_embeddable.vue';
import BlobContent from '~/blob/components/blob_content.vue';
import {
  BLOB_RENDER_EVENT_LOAD,
  BLOB_RENDER_EVENT_SHOW_SOURCE,
  BLOB_RENDER_ERRORS,
} from '~/blob/components/constants';
import { RichViewer, SimpleViewer } from '~/vue_shared/components/blob_viewers';
import {
  SNIPPET_VISIBILITY_PRIVATE,
  SNIPPET_VISIBILITY_INTERNAL,
  SNIPPET_VISIBILITY_PUBLIC,
} from '~/snippets/constants';

import { Blob as BlobMock, SimpleViewerMock, RichViewerMock } from 'jest/blob/components/mock_data';

describe('Blob Embeddable', () => {
  let wrapper;
  const snippet = {
    id: 'gid://foo.bar/snippet',
    webUrl: 'https://foo.bar',
    visibilityLevel: SNIPPET_VISIBILITY_PUBLIC,
    blob: BlobMock,
  };
  const dataMock = {
    activeViewerType: SimpleViewerMock.type,
  };

  function createComponent(props = {}, data = dataMock, contentLoading = false) {
    const $apollo = {
      queries: {
        blobContent: {
          loading: contentLoading,
          refetch: jest.fn(),
          skip: true,
        },
      },
    };

    wrapper = mount(SnippetBlobView, {
      propsData: {
        snippet: {
          ...snippet,
          ...props,
        },
      },
      data() {
        return {
          ...data,
        };
      },
      mocks: { $apollo },
    });
  }

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

  describe('rendering', () => {
    it('renders correct components', () => {
      createComponent();
      expect(wrapper.find(BlobEmbeddable).exists()).toBe(true);
      expect(wrapper.find(BlobHeader).exists()).toBe(true);
      expect(wrapper.find(BlobContent).exists()).toBe(true);
    });

    it.each([SNIPPET_VISIBILITY_INTERNAL, SNIPPET_VISIBILITY_PRIVATE, 'foo'])(
      'does not render blob-embeddable by default',
      visibilityLevel => {
        createComponent({
          visibilityLevel,
        });
        expect(wrapper.find(BlobEmbeddable).exists()).toBe(false);
      },
    );

    it('does render blob-embeddable for public snippet', () => {
      createComponent({
        visibilityLevel: SNIPPET_VISIBILITY_PUBLIC,
      });
      expect(wrapper.find(BlobEmbeddable).exists()).toBe(true);
    });

    it('sets simple viewer correctly', () => {
      createComponent();
      expect(wrapper.find(SimpleViewer).exists()).toBe(true);
    });

    it('sets rich viewer correctly', () => {
      const data = { ...dataMock, activeViewerType: RichViewerMock.type };
      createComponent({}, data);
      expect(wrapper.find(RichViewer).exists()).toBe(true);
    });

    it('correctly switches viewer type', () => {
      createComponent();
      expect(wrapper.find(SimpleViewer).exists()).toBe(true);

      wrapper.vm.switchViewer(RichViewerMock.type);

      return wrapper.vm
        .$nextTick()
        .then(() => {
          expect(wrapper.find(RichViewer).exists()).toBe(true);
          wrapper.vm.switchViewer(SimpleViewerMock.type);
        })
        .then(() => {
          expect(wrapper.find(SimpleViewer).exists()).toBe(true);
        });
    });

    it('passes information about render error down to blob header', () => {
      createComponent({
        blob: {
          ...BlobMock,
          simpleViewer: {
            ...SimpleViewerMock,
            renderError: BLOB_RENDER_ERRORS.REASONS.COLLAPSED.id,
          },
        },
      });

      expect(wrapper.find(BlobHeader).props('hasRenderError')).toBe(true);
    });

    describe('URLS with hash', () => {
      beforeEach(() => {
        window.location.hash = '#LC2';
      });

      afterEach(() => {
        window.location.hash = '';
      });

      it('renders simple viewer by default if URL contains hash', () => {
        createComponent({}, {});

        expect(wrapper.vm.activeViewerType).toBe(SimpleViewerMock.type);
        expect(wrapper.find(SimpleViewer).exists()).toBe(true);
      });

      describe('switchViewer()', () => {
        it('switches to the passed viewer', () => {
          createComponent();

          wrapper.vm.switchViewer(RichViewerMock.type);
          return wrapper.vm
            .$nextTick()
            .then(() => {
              expect(wrapper.vm.activeViewerType).toBe(RichViewerMock.type);
              expect(wrapper.find(RichViewer).exists()).toBe(true);

              wrapper.vm.switchViewer(SimpleViewerMock.type);
            })
            .then(() => {
              expect(wrapper.vm.activeViewerType).toBe(SimpleViewerMock.type);
              expect(wrapper.find(SimpleViewer).exists()).toBe(true);
            });
        });
      });
    });
  });

  describe('functionality', () => {
    describe('render error', () => {
      const findContentEl = () => wrapper.find(BlobContent);

      it('correctly sets blob on the blob-content-error component', () => {
        createComponent();
        expect(findContentEl().props('blob')).toEqual(BlobMock);
      });

      it(`refetches blob content on ${BLOB_RENDER_EVENT_LOAD} event`, () => {
        createComponent();

        expect(wrapper.vm.$apollo.queries.blobContent.refetch).not.toHaveBeenCalled();
        findContentEl().vm.$emit(BLOB_RENDER_EVENT_LOAD);
        expect(wrapper.vm.$apollo.queries.blobContent.refetch).toHaveBeenCalledTimes(1);
      });

      it(`sets '${SimpleViewerMock.type}' as active on ${BLOB_RENDER_EVENT_SHOW_SOURCE} event`, () => {
        createComponent(
          {},
          {
            activeViewerType: RichViewerMock.type,
          },
        );

        findContentEl().vm.$emit(BLOB_RENDER_EVENT_SHOW_SOURCE);
        expect(wrapper.vm.activeViewerType).toEqual(SimpleViewerMock.type);
      });
    });
  });
});