/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import fetchMock from 'fetch-mock';

import callApiAndParseWithTimeout from '../../../src/connection/callApi/callApiAndParseWithTimeout';

// we import these via * so that we can spy on the 'default' property of the object
import * as callApi from '../../../src/connection/callApi/callApi';
import * as parseResponse from '../../../src/connection/callApi/parseResponse';
import * as rejectAfterTimeout from '../../../src/connection/callApi/rejectAfterTimeout';

import { LOGIN_GLOB } from '../fixtures/constants';

describe('callApiAndParseWithTimeout()', () => {
  beforeAll(() => {
    fetchMock.get(LOGIN_GLOB, { result: '1234' });
  });

  afterAll(fetchMock.restore);

  const mockGetUrl = '/mock/get/url';
  const mockGetPayload = { get: 'payload' };
  fetchMock.get(mockGetUrl, mockGetPayload);

  afterEach(() => {
    fetchMock.reset();
    jest.useRealTimers();
  });

  describe('callApi', () => {
    it('calls callApi()', () => {
      const callApiSpy = jest.spyOn(callApi, 'default');
      callApiAndParseWithTimeout({ url: mockGetUrl, method: 'GET' });

      expect(callApiSpy).toHaveBeenCalledTimes(1);
      callApiSpy.mockClear();
    });
  });

  describe('parseResponse', () => {
    it('calls parseResponse()', async () => {
      const parseSpy = jest.spyOn(parseResponse, 'default');

      await callApiAndParseWithTimeout({
        url: mockGetUrl,
        method: 'GET',
      });

      expect(parseSpy).toHaveBeenCalledTimes(1);
      parseSpy.mockClear();
    });
  });

  describe('timeout', () => {
    it('does not create a rejection timer if no timeout passed', () => {
      const rejectionSpy = jest.spyOn(rejectAfterTimeout, 'default');
      callApiAndParseWithTimeout({ url: mockGetUrl, method: 'GET' });

      expect(rejectionSpy).toHaveBeenCalledTimes(0);
      rejectionSpy.mockClear();
    });

    it('creates a rejection timer if a timeout passed', () => {
      jest.useFakeTimers(); // prevents the timeout from rejecting + failing test
      const rejectionSpy = jest.spyOn(rejectAfterTimeout, 'default');
      callApiAndParseWithTimeout({
        url: mockGetUrl,
        method: 'GET',
        timeout: 10,
      });

      expect(rejectionSpy).toHaveBeenCalledTimes(1);
      rejectionSpy.mockClear();
    });

    it('rejects if the request exceeds the timeout', async () => {
      expect.assertions(2);
      jest.useFakeTimers();

      const mockTimeoutUrl = '/mock/timeout/url';
      const unresolvingPromise = new Promise(() => {});
      let error;
      fetchMock.get(mockTimeoutUrl, () => unresolvingPromise);

      try {
        const promise = callApiAndParseWithTimeout({
          url: mockTimeoutUrl,
          method: 'GET',
          timeout: 1,
        });
        jest.advanceTimersByTime(2);
        await promise;
      } catch (err) {
        error = err;
      } finally {
        expect(fetchMock.calls(mockTimeoutUrl)).toHaveLength(1);
        expect(error).toEqual({
          error: 'Request timed out',
          statusText: 'timeout',
          timeout: 1,
        });
      }
    });

    it('resolves if the request does not exceed the timeout', async () => {
      expect.assertions(1);
      const { json } = await callApiAndParseWithTimeout({
        url: mockGetUrl,
        method: 'GET',
        timeout: 100,
      });
      expect(json).toEqual(mockGetPayload);
    });
  });
});