import { Component, ViewChild } from '@angular/core';
import { TestBed } from '@angular/core/testing';
import {
  UiButtonComponent,
  UiConfirmDialogComponent,
  UiEmptyStateComponent,
  UiFormFieldComponent,
  UiIconButtonComponent,
  UiPaginationComponent,
  UiStatusBadgeComponent,
  UiToastHostComponent,
  ToastService,
} from './index';
import { isDesignSystemRouteEnabled } from '../../core/dev-only.guard';
import { devRoutes } from '../../core/dev-routes.prod';

@Component({
  standalone: true,
  imports: [
    UiButtonComponent,
    UiConfirmDialogComponent,
    UiEmptyStateComponent,
    UiFormFieldComponent,
    UiIconButtonComponent,
    UiPaginationComponent,
    UiStatusBadgeComponent,
    UiToastHostComponent,
  ],
  template: `
    <button id="trigger" type="button">Trigger</button>
    <ui-button label="Speichern" [loading]="true" />
    <ui-icon-button icon="delete" label="Eintrag loeschen" />
    <ui-form-field label="Name" error="Name ist erforderlich">
      <input class="ui-control" aria-invalid="true" />
    </ui-form-field>
    <ui-status-badge label="Deaktiviert" tone="danger" />
    <ui-empty-state title="Keine Daten" actionLabel="Neu" (action)="emptyActionCount += 1" />
    <ui-pagination [page]="2" [pageSize]="10" [total]="35" (pageChange)="page = $event" />
    <ui-confirm-dialog />
    <ui-toast-host />
  `,
})
class UiTestHostComponent {
  @ViewChild(UiConfirmDialogComponent) dialog?: UiConfirmDialogComponent;
  page = 2;
  emptyActionCount = 0;
}

describe('shared UI components', () => {
  it('renders button loading and disabled state', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    fixture.detectChanges();

    const button = (fixture.nativeElement as HTMLElement).querySelector('ui-button button');
    expect(button?.hasAttribute('disabled')).toBe(true);
    expect(button?.getAttribute('aria-busy')).toBe('true');
  });

  it('requires accessible labels for icon buttons', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    fixture.detectChanges();

    const button = (fixture.nativeElement as HTMLElement).querySelector('ui-icon-button button');
    expect(button?.getAttribute('aria-label')).toBe('Eintrag loeschen');
  });

  it('shows form field errors and status text', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    fixture.detectChanges();
    const element = fixture.nativeElement as HTMLElement;

    expect(element.textContent).toContain('Name ist erforderlich');
    expect(element.textContent).toContain('Deaktiviert');
  });

  it('opens and closes confirm dialog and restores focus', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    fixture.detectChanges();
    const trigger = (fixture.nativeElement as HTMLElement).querySelector<HTMLButtonElement>(
      '#trigger',
    );
    trigger?.focus();

    const promise = fixture.componentInstance.dialog?.open({
      title: 'Loeschen',
      description: 'Wirklich loeschen?',
      confirmLabel: 'Loeschen',
      danger: true,
    });
    fixture.detectChanges();
    await fixture.whenStable();

    expect((fixture.nativeElement as HTMLElement).querySelector('[role="dialog"]')).not.toBeNull();
    fixture.componentInstance.dialog?.close(true);
    fixture.detectChanges();

    await expect(promise).resolves.toBe(true);
    expect(document.activeElement).toBe(trigger);
  });

  it('shows and closes toasts', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    const service = TestBed.inject(ToastService);
    const id = service.show({ tone: 'success', title: 'Gespeichert' });
    fixture.detectChanges();

    expect((fixture.nativeElement as HTMLElement).textContent).toContain('Gespeichert');
    service.close(id);
    fixture.detectChanges();
    expect((fixture.nativeElement as HTMLElement).textContent).not.toContain('Gespeichert');
  });

  it('emits empty state and pagination actions', async () => {
    await TestBed.configureTestingModule({ imports: [UiTestHostComponent] }).compileComponents();
    const fixture = TestBed.createComponent(UiTestHostComponent);
    fixture.detectChanges();
    const element = fixture.nativeElement as HTMLElement;

    element.querySelector<HTMLButtonElement>('ui-empty-state button')?.click();
    element.querySelectorAll<HTMLButtonElement>('ui-pagination button')[0]?.click();

    expect(fixture.componentInstance.emptyActionCount).toBe(1);
    expect(fixture.componentInstance.page).toBe(1);
  });

  it('keeps the design system route disabled outside development mode', () => {
    expect(isDesignSystemRouteEnabled(false)).toBe(false);
    expect(devRoutes).toHaveLength(0);
  });
});