import { act, render, screen, waitFor } from '@testing-library/react';
import { backendSrv } from 'app/core/services/backend_srv';
import { createFetchResponse } from 'test/helpers/createFetchResponse';
import { DataQueryRequest, DataSourceInstanceSettings, dateTime, PluginType } from '@grafana/data';
import { of } from 'rxjs';
import { JaegerDatasource, JaegerJsonData } from '../datasource';
import { JaegerQuery } from '../types';
import React from 'react';
import SearchForm from './SearchForm';
import { testResponse } from '../testResponse';
import userEvent from '@testing-library/user-event';

describe('SearchForm', () => {
  it('should call the `onChange` function on click of the Input', async () => {
    const promise = Promise.resolve();
    const handleOnChange = jest.fn(() => promise);
    const query = {
      ...defaultQuery,
      targets: [
        {
          query: 'a/b',
          refId: '1',
        },
      ],
      refId: '121314',
    };
    const ds = {
      async metadataRequest(url: string, params?: Record<string, any>): Promise<any> {
        if (url === '/api/services') {
          return Promise.resolve(['jaeger-query', 'service2', 'service3']);
        }
      },
    } as JaegerDatasource;
    setupFetchMock({ data: [testResponse] });

    render(<SearchForm datasource={ds} query={query} onChange={handleOnChange} />);

    const asyncServiceSelect = await waitFor(() => screen.getByRole('combobox', { name: 'select-service-name' }));
    expect(asyncServiceSelect).toBeInTheDocument();

    userEvent.click(asyncServiceSelect);

    const jaegerService = await screen.findByText('jaeger-query');
    expect(jaegerService).toBeInTheDocument();
  });

  it('should be able to select operation name if query.service exists', async () => {
    const promise = Promise.resolve();
    const handleOnChange = jest.fn(() => promise);
    const query2 = {
      ...defaultQuery,
      targets: [
        {
          query: 'a/b',
          refId: '1',
        },
      ],
      refId: '121314',
      service: 'jaeger-query',
    };
    setupFetchMock({ data: [testResponse] });

    render(<SearchForm datasource={{} as JaegerDatasource} query={query2} onChange={handleOnChange} />);

    const asyncOperationSelect2 = await waitFor(() => screen.getByRole('combobox', { name: 'select-operation-name' }));
    expect(asyncOperationSelect2).toBeInTheDocument();
  });
});

describe('SearchForm', () => {
  it('should show loader if there is a delay fetching options', async () => {
    const promise = Promise.resolve();
    const handleOnChange = jest.fn(() => {
      setTimeout(() => {
        return promise;
      }, 3000);
    });
    const query = {
      ...defaultQuery,
      targets: [
        {
          query: 'a/b',
          refId: '1',
        },
      ],
      refId: '121314',
      service: 'jaeger-query',
    };
    const ds = new JaegerDatasource(defaultSettings);
    setupFetchMock({ data: [testResponse] });

    render(<SearchForm datasource={ds} query={query} onChange={handleOnChange} />);

    const asyncServiceSelect = screen.getByRole('combobox', { name: 'select-service-name' });
    userEvent.click(asyncServiceSelect);
    const loader = screen.getByText('Loading options...');

    expect(loader).toBeInTheDocument();
    await act(() => promise);
  });
});

function setupFetchMock(response: any, mock?: any) {
  const defaultMock = () => mock ?? of(createFetchResponse(response));

  const fetchMock = jest.spyOn(backendSrv, 'fetch');
  fetchMock.mockImplementation(defaultMock);
  return fetchMock;
}

const defaultSettings: DataSourceInstanceSettings<JaegerJsonData> = {
  id: 0,
  uid: '0',
  type: 'tracing',
  name: 'jaeger',
  url: 'http://grafana.com',
  access: 'proxy',
  meta: {
    id: 'jaeger',
    name: 'jaeger',
    type: PluginType.datasource,
    info: {} as any,
    module: '',
    baseUrl: '',
  },
  jsonData: {
    nodeGraph: {
      enabled: true,
    },
  },
};

const defaultQuery: DataQueryRequest<JaegerQuery> = {
  requestId: '1',
  dashboardId: 0,
  interval: '0',
  intervalMs: 10,
  panelId: 0,
  scopedVars: {},
  range: {
    from: dateTime().subtract(1, 'h'),
    to: dateTime(),
    raw: { from: '1h', to: 'now' },
  },
  timezone: 'browser',
  app: 'explore',
  startTime: 0,
  targets: [
    {
      query: '12345',
      refId: '1',
    },
  ],
};