import {ComponentFixture, fakeAsync, flush, TestBed, tick} from '@angular/core/testing';
import {MeasurementsUltrasoundComponent} from './measurements-ultrasound.component';
import {Subject} from 'rxjs';
import {MatIconTestingModule} from '@angular/material/icon/testing';
import {ScanningObservationTable} from '@nspop/gm-web-facade-api';
import {JsonTransformerUtil} from '../../../utils/json-transformer.util';
import {ObservationService} from '../../api/observation.service';
import {HttpClientTestingModule} from '@angular/common/http/testing';

describe('MeasurementsScansComponent', () => {
  let component: MeasurementsUltrasoundComponent;
  let fixture: ComponentFixture<MeasurementsUltrasoundComponent>;
  let observationService: ObservationService;
  let ultraSoundObservationTableSubjectStub: Subject<ScanningObservationTable>;

  beforeEach(async () => {
    ultraSoundObservationTableSubjectStub = new Subject<ScanningObservationTable>();

    observationService = {
      ultrasoundObservationTable$: ultraSoundObservationTableSubjectStub.asObservable()
    } as any;

    await TestBed.configureTestingModule({
      declarations: [ MeasurementsUltrasoundComponent ],
      imports: [MatIconTestingModule, HttpClientTestingModule],
      providers: [
        {provide: ObservationService, useValue: observationService},
      ]
    })
    .compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(MeasurementsUltrasoundComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });

  it('only registers changes if model has structural changes', () => {
    const onChange = jasmine.createSpy('onChange');
    component.writeValue({episodeOfCareIdentifier: '2'} as any);
    component.registerOnChange(onChange);
    component.writeValue({episodeOfCareIdentifier: '2'} as any);
    expect(onChange).not.toHaveBeenCalled();
    component.writeValue({episodeOfCareIdentifier: '1'} as any);
    expect(onChange).toHaveBeenCalled();
  });

  it('updates inner value when ngModel is updated on the outside', () => {
    component.writeValue({episodeOfCareIdentifier: '1'} as any);
    expect(component.value?.asDataCard).toEqual({episodeOfCareIdentifier: '1'} as any);
  });

  it('merges observations correctly into rows', fakeAsync(() => {
    ultraSoundObservationTableSubjectStub.next(JsonTransformerUtil.transformDates(JSON.parse('{\n' + // actual example of response from server
      '        "mother":{\n' +
      '          "rows":[\n' +
      '            {\n' +
      '              "activityId":"3",\n' +
      '              "date":"2021-01-20T14:28:02.187Z",\n' +
      '              "gestationAge":"22+4",\n' +
      '              "amnioticFluid":{\n' +
      '                "value":42,\n' +
      '                "unit":"cm"\n' +
      '              },\n' +
      '              "flow":"??",\n' +
      '              "cervix":{\n' +
      '                "value":10,\n' +
      '                "unit":"cm"\n' +
      '              },\n' +
      '              "dvp":{\n' +
      '                "value":11,\n' +
      '                "unit":"ml"\n' +
      '              },\n' +
      '              "conclusion":"Her en en konklusion"\n' +
      '            },\n' +
      '            {\n' +
      '              "activityId":"7",\n' +
      '              "date":"2021-01-20T14:28:02.187Z",\n' +
      '              "gestationAge":"24+4",\n' +
      '              "amnioticFluid":{\n' +
      '                "value":42,\n' +
      '                "unit":"cm"\n' +
      '              },\n' +
      '              "flow":"??",\n' +
      '              "cervix":{\n' +
      '                "value":7,\n' +
      '                "unit":"cm"\n' +
      '              },\n' +
      '              "dvp":{\n' +
      '                "value":9,\n' +
      '                "unit":"ml"\n' +
      '              },\n' +
      '              "conclusion":"Her en en konklusion"\n' +
      '            }\n' +
      '          ]\n' +
      '        },\n' +
      '        "fetuses":[\n' +
      '          {\n' +
      '            "name":"Foster 1",\n' +
      '            "id":"Foster 1",\n' +
      '            "rows":[\n' +
      '              {\n' +
      '                "activityId":"3",\n' +
      '                "date":"2021-01-20T14:28:02.187Z",\n' +
      '                "gestationAge":"22+4",\n' +
      '                "ulWeight":{\n' +
      '                  "value":1800,\n' +
      '                  "unit":"g"\n' +
      '                },\n' +
      '                "weightDeviation":{\n' +
      '                  "value":10,\n' +
      '                  "unit":"%"\n' +
      '                },\n' +
      '                "fetusPresentation":"H",\n' +
      '                "weeksIntoPregnancy":22.57\n' +
      '              },\n' +
      '              {\n' +
      '                "activityId":"7",\n' +
      '                "date":"2021-01-20T14:28:02.187Z",\n' +
      '                "gestationAge":"24+4",\n' +
      '                "ulWeight":{\n' +
      '                  "value":1400,\n' +
      '                  "unit":"g"\n' +
      '                },\n' +
      '                "weightDeviation":{\n' +
      '                  "value":10,\n' +
      '                  "unit":"%"\n' +
      '                },\n' +
      '                "fetusPresentation":"H",\n' +
      '                "weeksIntoPregnancy":22.57\n' +
      '              }\n' +
      '            ]\n' +
      '          },\n' +
      '          {\n' +
      '            "name":"Foster 2",\n' +
      '            "id":"Foster 2",\n' +
      '            "rows":[\n' +
      '              {\n' +
      '                "activityId":"7",\n' +
      '                "date":"2021-01-20T14:28:02.187Z",\n' +
      '                "gestationAge":"24+4",\n' +
      '                "ulWeight":{\n' +
      '                  "value":1500,\n' +
      '                  "unit":"g"\n' +
      '                },\n' +
      '                "weightDeviation":{\n' +
      '                  "value":7,\n' +
      '                  "unit":"%"\n' +
      '                },\n' +
      '                "fetusPresentation":"H",\n' +
      '                "weeksIntoPregnancy":22.57\n' +
      '              }\n' +
      '            ]\n' +
      '          }\n' +
      '        ]\n' +
      '      }')));
    component.ngOnInit();
    flush();
    expect(component.rows.length).toBe(2);
    expect(component.rows[0].activityId).toEqual('3');
    expect(component.rows[0].gestationAge).toEqual('22+4');
    expect(component.rows[0].dvp).toEqual('11 ml');
    expect(component.rows[0].cervix).toEqual('10 cm');
    expect(component.rows[0].flow).toEqual('??');
    expect(component.rows[0].amnioticFluid).toEqual('42 cm');
    expect(component.rows[0].fetusPresentation).toEqual('H');
    expect(component.rows[0].weightDeviation).toEqual('10 %');
    expect(component.rows[0].ulWeight).toEqual('1800 g');
    expect(component.rows[1].activityId).toEqual('7');
    expect(component.rows[1].gestationAge).toEqual('24+4');
    expect(component.rows[1].dvp).toEqual('9 ml');
    expect(component.rows[1].cervix).toEqual('7 cm');
    expect(component.rows[1].flow).toEqual('??');
    expect(component.rows[1].amnioticFluid).toEqual('42 cm');
    expect(component.rows[1].fetusPresentation).toEqual('H, H');
    expect(component.rows[1].weightDeviation).toEqual('10 %, 7 %');
    expect(component.rows[1].ulWeight).toEqual('1400 g, 1500 g');

  }));

  it('handles no observations', fakeAsync(() => {
    ultraSoundObservationTableSubjectStub.next({
      mother: {rows: []},
      fetuses: [
        {id: '1', name: 'Foster 1', rows: []},
        {id: '2', name: 'Foster 2',  rows: []}
      ]} as any
    );
    component.ngOnInit();
    tick();
    expect(component.rows.length).toBe(0);
  }));

  it('handles missing measurements', fakeAsync(() => {
    const now = new Date();
    ultraSoundObservationTableSubjectStub.next({
      mother: {},
      fetuses: [
        {id: '1', name: 'Foster 1', rows: [{gestationAge: '11+4', date: now, activityId: '1', ulWeight: {value: 1400, unit: 'g'}}]},
        {id: '2', name: 'Foster 2',  rows: []},
        {id: '3', name: 'Foster 3'}
      ]} as any
    );

    component.ngOnInit();
    flush();
    expect(component.rows.length).toBe(1);
    expect(component.rows[0].activityId).toEqual('1');
    expect(component.rows[0].gestationAge).toEqual('11+4');
    expect(component.rows[0].date?.getTime()).toEqual(now.getTime());
    expect(component.rows[0].dvp).toEqual('-');
    expect(component.rows[0].cervix).toEqual('-');
    expect(component.rows[0].flow).toEqual('-');
    expect(component.rows[0].amnioticFluid).toEqual('-');
    expect(component.rows[0].fetusPresentation).toEqual('-');
    expect(component.rows[0].weightDeviation).toEqual('-');
    expect(component.rows[0].ulWeight).toEqual('1400 g');
  }));

  it('adds save listener on init', () => {
    const listeners: any[] = [];
    component.saveListeners = listeners;
    component.ngOnInit();
    expect(listeners.length).toBe(1);
  });

  it('removes save listener on destroy', () => {
    const f = () => undefined;
    const listeners: any[] = ['1', f];
    component.saveListeners = listeners;
    component.ngOnInit();
    expect(listeners.length).toBe(3);
    component.ngOnDestroy();
    expect(listeners.length).toBe(2);
    expect(listeners).toContain(f);
    expect(listeners).toContain('1');
  });
});