import { ComponentFixture, TestBed } from '@angular/core/testing';
import { provideMarkdown } from 'ngx-markdown';
import { Message } from '../../../core/api/models';
import { MessageBubbleComponent } from './message-bubble';

/**
 * 文件 / 图片卡片（2026-10-30 重做）
 *
 * 锁住三件事：主区可点开、下载是独立按钮、两者互不触发。
 */
describe('MessageBubble 文件卡片', () => {
  let fixture: ComponentFixture<MessageBubbleComponent>;

  function render(m: Message): void {
    fixture = TestBed.createComponent(MessageBubbleComponent);
    fixture.componentRef.setInput('message', m);
    fixture.componentRef.setInput('own', false);
    fixture.detectChanges();
  }

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

  it('非图片文件渲染为卡片，含主区与下载按钮', () => {
    render({
      id: 'm1',
      conversationId: 'c',
      sender: 'agent',
      kind: 'text',
      ts: new Date().toISOString(),
      state: 'sent',
      file: {
        kind: 'file',
        name: '报告.html',
        size: 1024,
        mimeType: 'text/html',
        url: 'https://x/a.html',
      },
    });

    expect(fixture.nativeElement.querySelector('.file-card')).not.toBeNull();
    expect(fixture.nativeElement.querySelector('.file-main')).not.toBeNull();
    expect(fixture.nativeElement.querySelectorAll('.file-act').length).toBe(2);
  });

  it('点下载按钮只下载，不触发预览', () => {
    render({
      id: 'm1',
      conversationId: 'c',
      sender: 'agent',
      kind: 'text',
      ts: new Date().toISOString(),
      state: 'sent',
      file: { kind: 'file', name: 'a.html', size: 1, mimeType: 'text/html', url: 'https://x/a.html' },
    });

    const previews: unknown[] = [];
    fixture.componentInstance.preview.subscribe((f) => previews.push(f));

    const link: HTMLAnchorElement = fixture.nativeElement.querySelectorAll('.file-act')[1];
    /*
     * 🔴 必须先拦掉默认行为：<a download href> 在 Karma 里会真的发起导航，
     *    表现为 "Some of your tests did a full page reload!" 然后整个 runner 断连。
     */
    const stop = (e: Event) => e.preventDefault();
    link.addEventListener('click', stop);
    link.click();
    link.removeEventListener('click', stop);

    // 下载是 <a download>，不经过 preview 输出
    expect(previews.length).toBe(0);
    expect(link.getAttribute('download')).toBe('a.html');
  });

  it('点主区触发预览', () => {
    render({
      id: 'm1',
      conversationId: 'c',
      sender: 'agent',
      kind: 'text',
      ts: new Date().toISOString(),
      state: 'sent',
      file: { kind: 'file', name: 'a.png', size: 1, mimeType: 'image/png', url: 'https://x/a.png' },
    });

    let got = 0;
    fixture.componentInstance.preview.subscribe(() => got++);
    (fixture.nativeElement.querySelector('button[aria-label="预览图片 a.png"]') as HTMLElement).click();
    expect(got).toBe(1);
  });
});