import {ComponentFixture, TestBed} from '@angular/core/testing';

import {MedicalHistoryComponent} from './medical-history.component';
import {DataCard} from '@nspop/gm-web-facade-api';
import {JsonTransformerUtil} from '../../../utils/json-transformer.util';
import {AppModule} from '../../app.module';

describe('MedicalHistoryComponent', () => {
  let component: MedicalHistoryComponent;
  let fixture: ComponentFixture<MedicalHistoryComponent>;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [ MedicalHistoryComponent ],
      imports: [AppModule]
    })
    .compileComponents();
  });

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

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

  it('only registers changes if model has structural changes', () => {
    const dataCard1 = {
      previousAbortionsSection: {
        abortions: []
      },
      previousBirthsSection: {
        births: []
      }
    } as any as DataCard;
    const dataCard2 = JsonTransformerUtil.transformDates(JSON.parse(JSON.stringify(dataCard1))) as any as DataCard;
    // tslint:disable-next-line:no-non-null-assertion It's not null because it's a copy of dataCard1 which has the property set...
    dataCard2.previousAbortionsSection!.abortions!.push({
      year: undefined,
      type: 'induced',
      gestationLength: {
        value: 6,
        unit: 'w'
      },
      indication: 'whatever'
    });
    const onChange = jasmine.createSpy('onChange');
    component.writeValue(dataCard1 );
    component.registerOnChange(onChange);
    component.writeValue(JsonTransformerUtil.transformDates(JSON.parse(JSON.stringify(dataCard1))) as any as DataCard);
    expect(onChange).toHaveBeenCalledTimes(0);
    component.writeValue(dataCard2 as any as DataCard);
    expect(onChange).toHaveBeenCalledTimes(1);
  });

  it('computes BMI correctly', () => {
    // correct values obtained by using 3rd party BMI calculator: https://netdoktor.dk/interactive/interactivetests/bmi.php
    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 180, unit: 'cm'},
        prenatalBodyWeight: {value: 90, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual(27.78);

    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 160, unit: 'cm'},
        prenatalBodyWeight: {value: 60, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual(23.44);

    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 150, unit: 'cm'},
        prenatalBodyWeight: {value: 40, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual(17.78);
  });

  it('updates bmi on data-card', () => {
    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 160, unit: 'cm'},
        prenatalBodyWeight: {value: 60, unit: 'kg'},
      }
    } as any);
    const bmi = component.bmi;
    expect(component.value?.bmi).toEqual(bmi as number);
  });

  it('handles that BMI can be un-computable', () => {
    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 0, unit: 'cm'},
        prenatalBodyWeight: {value: 90, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual('?');

    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 160, unit: 'cm'},
        prenatalBodyWeight: {value: 0, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual('?');

    component.writeValue({
      bodyMeasuresSection: {
        bodyHeight: {value: 0, unit: 'cm'},
        prenatalBodyWeight: {value: 0, unit: 'kg'},
      }
    } as any);
    expect(component.bmi).toEqual('?');

    component.writeValue({} as any);
    expect(component.bmi).toEqual('?');
  });

  it('does not wite a non-number in the actual model', () => {
    component.writeValue({} as any);
    expect(component.bmi).toEqual('?');
    expect(component.value?.bmi).toBeFalsy();
  });
});