import { GlFormRadioGroup, GlFormRadio, GlFormInputGroup } from '@gitlab/ui';
import { shallowMount } from '@vue/test-utils';
import Vue, { nextTick } from 'vue';
import Vuex from 'vuex';
import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
import { TEST_HOST } from 'helpers/test_constants';
import { extendedWrapper } from 'helpers/vue_test_utils_helper';
import ErrorTrackingSettings from '~/error_tracking_settings/components/app.vue';
import ErrorTrackingForm from '~/error_tracking_settings/components/error_tracking_form.vue';
import ProjectDropdown from '~/error_tracking_settings/components/project_dropdown.vue';
import createStore from '~/error_tracking_settings/store';

Vue.use(Vuex);

const TEST_GITLAB_DSN = 'https://gitlab.example.com/123456';

describe('error tracking settings app', () => {
  let store;
  let wrapper;

  const defaultProps = {
    initialEnabled: 'true',
    initialIntegrated: 'false',
    initialApiHost: TEST_HOST,
    initialToken: 'someToken',
    initialProject: null,
    listProjectsEndpoint: TEST_HOST,
    operationsSettingsEndpoint: TEST_HOST,
    gitlabDsn: TEST_GITLAB_DSN,
  };

  function mountComponent({
    glFeatures = { integratedErrorTracking: false },
    props = defaultProps,
  } = {}) {
    wrapper = extendedWrapper(
      shallowMount(ErrorTrackingSettings, {
        store, // Override the imported store
        propsData: { ...props },
        provide: {
          glFeatures,
        },
        stubs: {
          GlFormInputGroup, // we need this non-shallow to query for a component within a slot
        },
      }),
    );
  }

  const findBackendSettingsSection = () => wrapper.findByTestId('tracking-backend-settings');
  const findBackendSettingsRadioGroup = () =>
    findBackendSettingsSection().findComponent(GlFormRadioGroup);
  const findBackendSettingsRadioButtons = () =>
    findBackendSettingsRadioGroup().findAllComponents(GlFormRadio);
  const findElementWithText = (wrappers, text) => wrappers.filter((item) => item.text() === text);
  const findSentrySettings = () => wrapper.findByTestId('sentry-setting-form');
  const findDsnSettings = () => wrapper.findByTestId('gitlab-dsn-setting-form');
  const findEnabledCheckbox = () => wrapper.findByTestId('error-tracking-enabled');

  const enableGitLabErrorTracking = async () => {
    findBackendSettingsRadioGroup().vm.$emit('change', true);
    await nextTick();
  };

  beforeEach(() => {
    store = createStore();

    mountComponent();
  });

  describe('section', () => {
    it('renders the form and dropdown', () => {
      expect(wrapper.findComponent(ErrorTrackingForm).exists()).toBe(true);
      expect(wrapper.findComponent(ProjectDropdown).exists()).toBe(true);
    });

    it('renders the Save Changes button', () => {
      expect(wrapper.find('.js-error-tracking-button').exists()).toBe(true);
    });

    it('enables the button by default', () => {
      expect(wrapper.find('.js-error-tracking-button').attributes('disabled')).toBeUndefined();
    });

    it('disables the button when saving', async () => {
      store.state.settingsLoading = true;

      await nextTick();
      expect(wrapper.find('.js-error-tracking-button').attributes('disabled')).toBeDefined();
    });
  });

  describe('tracking-backend settings', () => {
    it('does not contain backend settings section', () => {
      expect(findBackendSettingsSection().exists()).toBe(false);
    });

    it('shows the sentry form', () => {
      expect(findSentrySettings().exists()).toBe(true);
    });

    describe('enabled setting is true', () => {
      describe('integrated setting is true', () => {
        beforeEach(() => {
          mountComponent({
            props: { ...defaultProps, initialEnabled: 'true', initialIntegrated: 'true' },
          });
        });

        it('displays enabled as false', () => {
          expect(findEnabledCheckbox().attributes('checked')).toBeUndefined();
        });
      });

      describe('integrated setting is false', () => {
        beforeEach(() => {
          mountComponent({
            props: { ...defaultProps, initialEnabled: 'true', initialIntegrated: 'false' },
          });
        });

        it('displays enabled as true', () => {
          expect(findEnabledCheckbox().attributes('checked')).toBe('true');
        });
      });
    });

    describe('integrated_error_tracking feature flag enabled', () => {
      beforeEach(() => {
        mountComponent({
          glFeatures: { integratedErrorTracking: true },
        });
      });

      it('contains a form-group with the correct label', () => {
        expect(findBackendSettingsSection().attributes('label')).toBe('Error tracking backend');
      });

      it('contains a radio group', () => {
        expect(findBackendSettingsRadioGroup().exists()).toBe(true);
      });

      it('contains the correct radio buttons', () => {
        expect(findBackendSettingsRadioButtons()).toHaveLength(2);

        expect(findElementWithText(findBackendSettingsRadioButtons(), 'Sentry')).toHaveLength(1);
        expect(findElementWithText(findBackendSettingsRadioButtons(), 'GitLab')).toHaveLength(1);
      });

      it('hides the Sentry settings when GitLab is selected as a tracking-backend', async () => {
        expect(findSentrySettings().exists()).toBe(true);

        await enableGitLabErrorTracking();

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

      describe('GitLab DSN section', () => {
        it('is visible when GitLab is selected as a tracking-backend and DSN is present', async () => {
          expect(findDsnSettings().exists()).toBe(false);

          await enableGitLabErrorTracking();

          expect(findDsnSettings().exists()).toBe(true);
        });

        it('contains copy-to-clipboard functionality for the GitLab DSN string', async () => {
          await enableGitLabErrorTracking();

          const clipBoardInput = findDsnSettings().findComponent(GlFormInputGroup);
          const clipBoardButton = findDsnSettings().findComponent(ClipboardButton);

          expect(clipBoardInput.props('value')).toBe(TEST_GITLAB_DSN);
          expect(clipBoardInput.attributes('readonly')).toBe('');
          expect(clipBoardButton.props('text')).toBe(TEST_GITLAB_DSN);
        });
      });

      it.each([true, false])(
        'calls the `updateIntegrated` action when the setting changes to `%s`',
        (integrated) => {
          jest.spyOn(store, 'dispatch').mockImplementation();

          expect(store.dispatch).toHaveBeenCalledTimes(0);

          findBackendSettingsRadioGroup().vm.$emit('change', integrated);

          expect(store.dispatch).toHaveBeenCalledTimes(1);
          expect(store.dispatch).toHaveBeenCalledWith('updateIntegrated', integrated);
        },
      );
    });
  });
});