// @vitest-environment jsdom

import { act, render, screen } from '@testing-library/react';
import { createElement } from 'react';
import { afterEach, describe, expect, it, vi } from 'vitest';

import { RouteImageReadyGate } from './RouteImageReadyGate';
import {
  collectRouteImageUrls,
  extractCssImageUrls,
  normalizePreloadImageUrl,
} from './routeImageReadyGateUtils';
import { RouteLoadingScreen } from './RouteLoadingScreen';

afterEach(() => {
  vi.useRealTimers();
  window.localStorage.clear();
});

describe('RouteImageReadyGate image url helpers', () => {
  it('extracts urls from layered CSS image values', () => {
    expect(
      extractCssImageUrls(
        'linear-gradient(#000,#111), url("/hero.png"), url("icons/card.webp")',
      ),
    ).toEqual(['/hero.png', 'icons/card.webp']);
  });

  it('normalizes preloadable urls against the current document', () => {
    expect(normalizePreloadImageUrl('/cover.png')).toBe(
      new URL('/cover.png', document.baseURI).href,
    );
    expect(normalizePreloadImageUrl('data:image/png;base64,abc')).toBe(
      'data:image/png;base64,abc',
    );
    expect(normalizePreloadImageUrl('')).toBeNull();
  });

  it('collects img and CSS background urls from a route root', () => {
    const root = document.createElement('section');
    root.innerHTML = `
      <img src="/images/card.png" />
      <div style='background-image: url("/images/bg.webp")'></div>
      <div style='border-image-source: url("/ui/frame.png")'></div>
    `;

    expect(collectRouteImageUrls(root)).toEqual([
      new URL('/images/card.png', document.baseURI).href,
      new URL('/images/bg.webp', document.baseURI).href,
      new URL('/ui/frame.png', document.baseURI).href,
    ]);
  });

  it('reveals route content after a short cap when images stay pending', () => {
    vi.useFakeTimers();

    render(
      createElement(
        RouteImageReadyGate,
        {
          eyebrow: '正在载入游戏',
          text: '正在加载内容',
        },
        createElement(
          'section',
          {
            'data-testid': 'route-content',
          },
          createElement('img', {
            src: '/generated-characters/slow-cover.png',
            alt: 'slow cover',
          }),
        ),
      ),
    );

    const content = screen.getByTestId('route-content');
    const visibilityGate = content.parentElement;
    expect(visibilityGate?.getAttribute('aria-hidden')).toBe('true');
    expect(visibilityGate?.style.visibility).toBe('hidden');

    act(() => {
      vi.advanceTimersByTime(1600);
    });

    expect(visibilityGate?.getAttribute('aria-hidden')).toBe('false');
    expect(visibilityGate?.style.visibility).toBe('visible');
  });

  it('uses the saved platform theme tokens for the route loading screen', () => {
    window.localStorage.setItem(
      'tavernrealms.settings.v1',
      JSON.stringify({
        version: 1,
        musicVolume: 0.42,
        platformTheme: 'dark',
      }),
    );

    const { container } = render(
      createElement(RouteLoadingScreen, {
        eyebrow: '正在载入游戏',
        text: '正在加载内容',
      }),
    );
    const shell = container.firstElementChild;

    expect(shell?.classList.contains('platform-theme')).toBe(true);
    expect(shell?.classList.contains('platform-theme--dark')).toBe(true);
    expect(shell?.className).toContain('bg-[image:var(--platform-body-fill)]');
  });
});