import {getTestBed, inject, TestBed} from '@angular/core/testing';
import {HttpClientTestingModule, HttpTestingController} from '@angular/common/http/testing';
import {NetworkService} from './network.service';
import {Message} from '../../../../common/entities/Message';
import {SlimLoadingBarService} from 'ng2-slim-loading-bar';


describe('NetworkService Success tests', () => {

  const testUrl = '/test/url';
  const testData = {data: 'testData'};
  const testResponse = 'testResponse';
  const testResponseMessage = new Message(null, testResponse);
  let injector;
  let httpMock: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [
        SlimLoadingBarService,
        NetworkService
      ]
    });
    injector = getTestBed();
    httpMock = injector.get(HttpTestingController);
  });

  afterEach(() => {
    httpMock.verify();
  });

  it('should call GET', inject([NetworkService], (networkService: NetworkService) => {

    networkService.getJson(testUrl).then((res: string) => {
      expect(res).toBe(testResponse);
    }).catch((err) => {
      console.error(err);
      expect(err).toBeUndefined();
    });

    const mockReq = httpMock.expectOne({method: 'GET'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    mockReq.flush(testResponseMessage);
  }));

  it('should call POST', inject([NetworkService], (networkService: NetworkService) => {

    networkService.postJson(testUrl, testData).then((res: string) => {
      expect(res).toBe(testResponse);
    }).catch((err) => {
      console.error(err);
      expect(err).toBeUndefined();
    });

    let mockReq = httpMock.expectOne('/api' + testUrl);
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    mockReq.flush(testResponseMessage);
    expect(mockReq.request.body).toBe(testData);

    networkService.postJson(testUrl).then((res: string) => {
      expect(res).toBe(testResponse);
    }).catch((err) => {
      console.error(err);
      expect(err).toBeUndefined();
    });

    mockReq = httpMock.expectOne('/api' + testUrl);
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    expect(mockReq.request.body).toEqual({});
    mockReq.flush(testResponseMessage);


  }));


  it('should call DELETE', inject([NetworkService], (networkService: NetworkService) => {

    networkService.deleteJson(testUrl).then((res: any) => {
      expect(res).toBe(testResponse);
    });

    const mockReq = httpMock.expectOne({method: 'DELETE'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    mockReq.flush(testResponseMessage);
  }));

  it('should call PUT', inject([NetworkService], (networkService: NetworkService) => {

    networkService.putJson(testUrl, testData).then((res: any) => {
      expect(res).toBe(testResponse);
    });


    let mockReq = httpMock.expectOne({});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    expect(mockReq.request.body).toEqual(testData);
    mockReq.flush(testResponseMessage);


    networkService.putJson(testUrl).then((res: any) => {
      expect(res).toBe(testResponse);
    });

    mockReq = httpMock.expectOne({});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    expect(mockReq.request.body).toEqual({});
    mockReq.flush(testResponseMessage);

  }));

});


describe('NetworkService Fail tests', () => {

  const testUrl = '/test/url';
  const testData = {data: 'testData'};
  const testError = 'testError';
  let injector;
  let httpMock: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [
        SlimLoadingBarService,
        NetworkService
      ]
    });
    injector = getTestBed();
    httpMock = injector.get(HttpTestingController);
  });

  afterEach(() => {
    httpMock.verify();
  });

  it('should call GET with error', inject([NetworkService], (networkService: NetworkService) => {

    networkService.getJson(testUrl).then((res: any) => {
      expect(res).toBe(null);
    }).catch((err) => {
      expect(err).toBe('Http failure response for /api/test/url: 0 ' + testError);
    });


    const mockReq = httpMock.expectOne({method: 'GET'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    mockReq.error(null, {statusText: testError});
  }));

  it('should call POST with error', inject([NetworkService], (networkService: NetworkService) => {

    networkService.postJson(testUrl, testData).then((res: any) => {
      expect(res).toBe(null);
    }).catch((err) => {
      expect(err).toBe('Http failure response for /api/test/url: 0 ' + testError);
    });

    const mockReq = httpMock.expectOne({method: 'POST'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    expect(mockReq.request.body).toEqual(testData);
    mockReq.error(null, {statusText: testError});
  }));

  it('should call PUT with error', inject([NetworkService], (networkService: NetworkService) => {

    networkService.putJson(testUrl, testData).then((res: any) => {
      expect(res).toBe(null);
    }).catch((err) => {
      expect(err).toBe('Http failure response for /api/test/url: 0 ' + testError);
    });


    const mockReq = httpMock.expectOne({method: 'PUT'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    expect(mockReq.request.body).toEqual(testData);
    mockReq.error(null, {statusText: testError});

  }));

  it('should call DELETE with error', inject([NetworkService], (networkService: NetworkService) => {

    networkService.deleteJson(testUrl).then((res: any) => {
      expect(res).toBe(null);
    }).catch((err) => {
      expect(err).toBe('Http failure response for /api/test/url: 0 ' + testError);
    });

    const mockReq = httpMock.expectOne({method: 'DELETE'});
    expect(mockReq.cancelled).toBeFalsy();
    expect(mockReq.request.responseType).toEqual('json');
    mockReq.error(null, {statusText: testError});
  }));
});