import { HttpErrorResponse } from '@angular/common/http';
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { of, throwError } from 'rxjs';
import { beforeEach, describe, expect, it, vi } from 'vitest';

import { CaseDetailService } from '../case-detail.service';
import { ActionLink, ApplicantDetailsRequest } from '../case-detail.types';
import { EditApplicantDetails } from './edit-applicant-details';

const initial: ApplicantDetailsRequest = {
  surname: 'de Vries',
  initials: 'A.',
  address: { street: 'Kerkweg', number: '12', postalCode: '3512JK', city: 'Utrecht' },
  email: 'anna@example.nl',
  phone: null,
  preferredChannel: 'Post',
};

describe('EditApplicantDetails', () => {
  let fixture: ComponentFixture<EditApplicantDetails>;
  let updateDetails: ReturnType<typeof vi.fn>;

  function render(actionLink: ActionLink): HTMLElement {
    fixture = TestBed.createComponent(EditApplicantDetails);
    fixture.componentRef.setInput('actionLink', actionLink);
    fixture.componentRef.setInput('initial', initial);
    fixture.detectChanges();
    return fixture.nativeElement as HTMLElement;
  }

  function submitForm(el: HTMLElement): void {
    el.querySelector('form')!.dispatchEvent(new Event('submit', { cancelable: true }));
    fixture.detectChanges();
  }

  beforeEach(async () => {
    updateDetails = vi.fn();
    await TestBed.configureTestingModule({
      imports: [EditApplicantDetails],
      providers: [{ provide: CaseDetailService, useValue: { updateDetails } }],
    }).compileComponents();
  });

  it('shows the write-through disclaimer only in writeThrough mode', () => {
    const writeThroughEl = render({ mode: 'writeThrough', href: '/api/worklist/legacy/1001/details' });
    expect(writeThroughEl.querySelector('[data-testid="write-through-disclaimer"]')).toBeTruthy();

    const ownedEl = render({ mode: 'owned', href: '/api/worklist/owned/abc/details' });
    expect(ownedEl.querySelector('[data-testid="write-through-disclaimer"]')).toBeFalsy();
  });

  it('submits the form body to the given href and emits saved on success', () => {
    updateDetails.mockReturnValue(of(undefined));
    const el = render({ mode: 'owned', href: '/api/worklist/owned/abc/details' });
    const savedSpy = vi.fn();
    fixture.componentInstance.saved.subscribe(savedSpy);

    submitForm(el);

    expect(updateDetails).toHaveBeenCalledWith('/api/worklist/owned/abc/details', {
      surname: 'de Vries',
      initials: 'A.',
      address: { street: 'Kerkweg', number: '12', postalCode: '3512JK', city: 'Utrecht' },
      email: 'anna@example.nl',
      phone: null,
      preferredChannel: 'Post',
    });
    expect(savedSpy).toHaveBeenCalled();
  });

  it('maps a 400 ErrorsResponse to per-field inline errors', () => {
    updateDetails.mockReturnValue(
      throwError(
        () =>
          new HttpErrorResponse({
            status: 400,
            error: {
              errors: [
                { field: 'surname', message: 'Achternaam is verplicht.' },
                { field: 'address.number', message: 'Huisnummer is verplicht.' },
                { field: 'address.postalCode', message: 'Ongeldige postcode.' },
              ],
            },
          }),
      ),
    );
    const el = render({ mode: 'writeThrough', href: '/api/worklist/legacy/1001/details' });

    submitForm(el);

    expect(el.querySelector('[data-testid="field-error-surname"]')?.textContent).toContain('Achternaam is verplicht.');
    expect(el.querySelector('[data-testid="field-error-address.number"]')?.textContent).toContain('Huisnummer is verplicht.');
    expect(el.querySelector('[data-testid="field-error-address.postalCode"]')?.textContent).toContain('Ongeldige postcode.');
  });

  it('shows a 422 InvariantViolationResponse as an invariant + message banner', () => {
    updateDetails.mockReturnValue(
      throwError(() => new HttpErrorResponse({ status: 422, error: { invariant: 'Address.AllPartsRequired', message: 'All address parts are required.' } })),
    );
    const el = render({ mode: 'owned', href: '/api/worklist/owned/abc/details' });

    submitForm(el);

    expect(el.querySelector('[data-testid="edit-details-banner"]')?.textContent).toContain('Address.AllPartsRequired');
    expect(el.querySelector('[data-testid="edit-details-banner"]')?.textContent).toContain('All address parts are required.');
  });

  it('shows a 409 MessageResponse as a banner', () => {
    updateDetails.mockReturnValue(
      throwError(() => new HttpErrorResponse({ status: 409, error: { message: 'This aanvraag has already been migrated.' } })),
    );
    const el = render({ mode: 'writeThrough', href: '/api/worklist/legacy/1002/details' });

    submitForm(el);

    expect(el.querySelector('[data-testid="edit-details-banner"]')?.textContent).toContain('This aanvraag has already been migrated.');
  });
});