import { describe, it, expect } from 'vitest';
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { FormField } from '@app/shared/ui/form-field/form-field';

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

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

    fixture = TestBed.createComponent(FormField);
    component = fixture.componentInstance;
    fixture.componentRef.setInput('inputId', 'test-input');
    fixture.componentRef.setInput('label', 'Test Label');
    fixture.detectChanges();
  });

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

  it('should render label with text', () => {
    const label = fixture.nativeElement.querySelector('.form-field__label');

    expect(label?.textContent).toContain('Test Label');
  });

  it('should set for attribute on label', () => {
    const label = fixture.nativeElement.querySelector('.form-field__label');

    expect(label.getAttribute('for')).toBe('test-input');
  });

  it('should not show required marker by default', () => {
    const required = fixture.nativeElement.querySelector('.form-field__required');

    expect(required).toBeNull();
  });

  it('should show required marker when required is true', () => {
    fixture.componentRef.setInput('required', true);
    fixture.detectChanges();

    const required = fixture.nativeElement.querySelector('.form-field__required');

    expect(required).toBeTruthy();
    expect(required.textContent).toContain('*');
  });

  it('should not show error message by default', () => {
    const error = fixture.nativeElement.querySelector('.form-field__error');

    expect(error).toBeNull();
  });

  it('should show error message when hasError and errorMessage are set', () => {
    fixture.componentRef.setInput('hasError', true);
    fixture.componentRef.setInput('errorMessage', 'This field is required');
    fixture.detectChanges();

    const error = fixture.nativeElement.querySelector('.form-field__error');

    expect(error).toBeTruthy();
    expect(error.textContent).toContain('This field is required');
  });

  it('should not show error when hasError is true but no errorMessage', () => {
    fixture.componentRef.setInput('hasError', true);
    fixture.detectChanges();

    const error = fixture.nativeElement.querySelector('.form-field__error');

    expect(error).toBeNull();
  });

  it('should apply error class when hasError is true', () => {
    fixture.componentRef.setInput('hasError', true);
    fixture.detectChanges();

    const div = fixture.nativeElement.querySelector('.form-field');

    expect(div.classList.contains('form-field--error')).toBe(true);
  });

  it('should show helper text when set', () => {
    fixture.componentRef.setInput('helperText', 'Some helper text');
    fixture.detectChanges();

    const helper = fixture.nativeElement.querySelector('.form-field__helper');

    expect(helper).toBeTruthy();
    expect(helper.textContent).toContain('Some helper text');
  });

  it('should not show helper text by default', () => {
    const helper = fixture.nativeElement.querySelector('.form-field__helper');

    expect(helper).toBeNull();
  });
});