import { render, screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';

import { DataSourceInstanceSettings } from '@grafana/data';
import { selectors } from '@grafana/e2e-selectors';
import { mockDataSource } from 'app/features/alerting/unified/mocks';
import { DataSourceType } from 'app/features/alerting/unified/utils/datasource';

import { Props, QueryEditorRowHeader } from './QueryEditorRowHeader';

const mockDS = mockDataSource({
  name: 'CloudManager',
  type: DataSourceType.Alertmanager,
});

const mockVariable = mockDataSource({
  name: '${dsVariable}',
  type: 'datasource',
});

jest.mock('@grafana/runtime/src/services/dataSourceSrv', () => {
  return {
    getDataSourceSrv: () => ({
      get: () => Promise.resolve(mockDS),
      getList: ({ variables }: { variables: boolean }) => (variables ? [mockDS, mockVariable] : [mockDS]),
      getInstanceSettings: () => mockDS,
    }),
  };
});

describe('QueryEditorRowHeader', () => {
  it('Can edit title', async () => {
    const scenario = renderScenario({});
    await userEvent.click(screen.getByTestId('query-name-div'));

    const input = screen.getByTestId('query-name-input');
    await userEvent.clear(input);
    await userEvent.type(input, 'new name');

    // blur the field
    await userEvent.click(document.body);

    expect(jest.mocked(scenario.props.onChange).mock.calls[0][0].refId).toBe('new name');
  });

  it('Show error when other query with same name exists', async () => {
    renderScenario({});

    await userEvent.click(screen.getByTestId('query-name-div'));
    const input = screen.getByTestId('query-name-input');
    await userEvent.clear(input);
    await userEvent.type(input, 'B');
    const alert = await screen.findByRole('alert');

    expect(alert.textContent).toBe('Query name already exists');
  });

  it('Show error when empty name is specified', async () => {
    renderScenario({});

    await userEvent.click(screen.getByTestId('query-name-div'));
    const input = screen.getByTestId('query-name-input');
    await userEvent.clear(input);
    const alert = await screen.findByRole('alert');

    expect(alert.textContent).toBe('An empty query name is not allowed');
  });

  it('should show data source picker when callback is passed', async () => {
    renderScenario({ onChangeDataSource: () => {} });

    expect(screen.queryByTestId(selectors.components.DataSourcePicker.container)).not.toBeNull();
  });

  it('should not show data source picker when no callback is passed', async () => {
    renderScenario({ onChangeDataSource: undefined });

    expect(screen.queryByTestId(selectors.components.DataSourcePicker.container)).toBeNull();
  });

  it('should render variables in the data source picker', async () => {
    renderScenario({ onChangeDataSource: () => {} });

    const dsSelect = screen.getByTestId(selectors.components.DataSourcePicker.container).querySelector('input')!;
    await userEvent.click(dsSelect);
    expect(await screen.findByText('${dsVariable}')).toBeInTheDocument();
  });
});

function renderScenario(overrides: Partial<Props>) {
  const props: Props = {
    query: {
      refId: 'A',
    },
    queries: [
      {
        refId: 'A',
      },
      {
        refId: 'B',
      },
    ],
    dataSource: {} as DataSourceInstanceSettings,
    hidden: false,
    onChange: jest.fn(),
    onClick: jest.fn(),
    collapsedText: '',
  };

  Object.assign(props, overrides);

  return {
    props,
    renderResult: render(<QueryEditorRowHeader {...props} />),
  };
}
