import { GlLoadingIcon, GlAlert, GlSprintf } from '@gitlab/ui';
import { shallowMount } from '@vue/test-utils';
import Vue, { nextTick } from 'vue';
import AxiosMockAdapter from 'axios-mock-adapter';
import Vuex from 'vuex';
import { TEST_HOST } from 'helpers/test_constants';
import axios from '~/lib/utils/axios_utils';
import EmptyState from '~/serverless/components/empty_state.vue';
import EnvironmentRow from '~/serverless/components/environment_row.vue';
import functionsComponent from '~/serverless/components/functions.vue';
import { createStore } from '~/serverless/store';
import { mockServerlessFunctions } from '../mock_data';

describe('functionsComponent', () => {
  const statusPath = `${TEST_HOST}/statusPath`;

  let component;
  let store;
  let axiosMock;

  beforeEach(() => {
    axiosMock = new AxiosMockAdapter(axios);
    axiosMock.onGet(statusPath).reply(200);

    Vue.use(Vuex);

    store = createStore({});
    component = shallowMount(functionsComponent, { store, stubs: { GlSprintf } });
  });

  afterEach(() => {
    component.destroy();
    axiosMock.restore();
  });

  it('should render deprecation notice', () => {
    expect(component.findComponent(GlAlert).text()).toBe(
      'Serverless was deprecated in GitLab 14.3.',
    );
  });

  it('should render empty state when Knative is not installed', async () => {
    await store.dispatch('receiveFunctionsSuccess', { knative_installed: false });

    expect(component.findComponent(EmptyState).exists()).toBe(true);
  });

  it('should render a loading component', async () => {
    await store.dispatch('requestFunctionsLoading');

    expect(component.findComponent(GlLoadingIcon).exists()).toBe(true);
  });

  it('should render empty state when there is no function data', async () => {
    await store.dispatch('receiveFunctionsNoDataSuccess', { knative_installed: true });

    expect(
      component.vm.$el
        .querySelector('.empty-state, .js-empty-state')
        .classList.contains('js-empty-state'),
    ).toBe(true);

    expect(component.vm.$el.querySelector('.state-title, .text-center').innerHTML.trim()).toEqual(
      'No functions available',
    );
  });

  it('should render functions and a loader when functions are partially fetched', async () => {
    await store.dispatch('receiveFunctionsPartial', {
      ...mockServerlessFunctions,
      knative_installed: 'checking',
    });

    expect(component.find('.js-functions-wrapper').exists()).toBe(true);
    expect(component.find('.js-functions-loader').exists()).toBe(true);
  });

  it('should render the functions list', async () => {
    store = createStore({ clustersPath: 'clustersPath', helpPath: 'helpPath', statusPath });

    await component.vm.$store.dispatch('receiveFunctionsSuccess', mockServerlessFunctions);

    await nextTick();
    expect(component.findComponent(EnvironmentRow).exists()).toBe(true);
  });
});