import { describe, expect, it } from 'vitest';
import {
  aboutLink,
  archiveLink,
  blogLink,
  friendsLink,
  homeLink,
  navLinks,
  resolveThemeOptions,
} from './options';

describe('nav link helpers', () => {
  it('homeLink returns default label', () => {
    expect(homeLink()).toEqual({ href: '/', label: '首页' });
  });

  it('homeLink accepts custom label', () => {
    expect(homeLink('Home')).toEqual({ href: '/', label: 'Home' });
  });

  it('blogLink returns default label', () => {
    expect(blogLink()).toEqual({ href: '/blog', label: '文章' });
  });

  it('archiveLink returns default label', () => {
    expect(archiveLink()).toEqual({ href: '/archive', label: '归档' });
  });

  it('aboutLink returns default label', () => {
    expect(aboutLink()).toEqual({ href: '/about', label: '关于' });
  });

  it('friendsLink returns default label', () => {
    expect(friendsLink()).toEqual({ href: '/friends', label: '友链' });
  });

  it('navLinks returns standard order', () => {
    const links = navLinks();
    expect(links).toHaveLength(5);
    expect(links.map((l) => l.href)).toEqual([
      '/',
      '/blog',
      '/archive',
      '/friends',
      '/about',
    ]);
  });

  it('navLinks inserts extra links before about', () => {
    const links = navLinks([{ href: '/projects', label: '项目' }]);
    expect(links).toHaveLength(6);
    expect(links[4]).toEqual({ href: '/projects', label: '项目' });
    expect(links[5].href).toBe('/about');
  });
});

describe('resolveThemeOptions', () => {
  it('returns all defaults when called with no arguments', () => {
    const resolved = resolveThemeOptions();
    expect(resolved.title).toBe('木漏れ日');
    expect(resolved.tagline).toBe('');
    expect(resolved.locale).toBe('zh-CN');
    expect(resolved.pagination.pageSize).toBe(10);
    expect(resolved.repositoryUrl).toBeUndefined();
    expect(resolved.friends).toEqual([]);
    expect(resolved.customCss).toEqual([]);
  });

  it('returns default home content', () => {
    const { home } = resolveThemeOptions();
    expect(home.eyebrow).toBe('欢迎来到这里');
    expect(home.title).toBe('Hi~');
    expect(home.description).toContain('欢迎来到我的博客');
  });

  it('returns default labels', () => {
    const { labels } = resolveThemeOptions();
    expect(labels.latestPostsHeading).toBe('最近写了什么');
    expect(labels.latestPostsMore).toBe('查看全部 →');
    expect(labels.footerRss).toBe('订阅 RSS');
  });

  it('returns default nav via navLinks()', () => {
    const { nav } = resolveThemeOptions();
    expect(nav).toHaveLength(5);
    expect(nav[0].href).toBe('/');
    expect(nav[nav.length - 1].href).toBe('/about');
  });

  it('overrides title', () => {
    const resolved = resolveThemeOptions({ title: 'My Blog' });
    expect(resolved.title).toBe('My Blog');
  });

  it('overrides tagline', () => {
    const resolved = resolveThemeOptions({ tagline: 'Hello' });
    expect(resolved.tagline).toBe('Hello');
  });

  it('overrides locale', () => {
    const resolved = resolveThemeOptions({ locale: 'en' });
    expect(resolved.locale).toBe('en');
  });

  it('overrides pagination size', () => {
    const resolved = resolveThemeOptions({ pagination: { pageSize: 20 } });
    expect(resolved.pagination.pageSize).toBe(20);
  });

  it('preserves default pagination size when only partial override', () => {
    const resolved = resolveThemeOptions({ pagination: {} });
    expect(resolved.pagination.pageSize).toBe(10);
  });

  it('overrides home section', () => {
    const resolved = resolveThemeOptions({
      home: { title: 'Welcome', description: 'Desc' },
    });
    expect(resolved.home.title).toBe('Welcome');
    expect(resolved.home.description).toBe('Desc');
    expect(resolved.home.eyebrow).toBe('欢迎来到这里');
  });

  it('includes repositoryUrl when provided', () => {
    const resolved = resolveThemeOptions({
      repositoryUrl: 'https://github.com/example/repo',
    });
    expect(resolved.repositoryUrl).toBe('https://github.com/example/repo');
  });

  it('omits repositoryUrl when not provided', () => {
    const resolved = resolveThemeOptions({});
    expect('repositoryUrl' in resolved).toBe(false);
  });

  it('overrides nav completely', () => {
    const customNav = [{ href: '/custom', label: 'Custom' }];
    const resolved = resolveThemeOptions({ nav: customNav });
    expect(resolved.nav).toEqual(customNav);
  });

  it('overrides friends', () => {
    const friends = [
      {
        name: 'Alice',
        url: 'https://alice.dev',
        avatar: '',
        description: 'Dev',
      },
    ];
    const resolved = resolveThemeOptions({ friends });
    expect(resolved.friends).toEqual(friends);
  });

  it('merges partial labels with defaults', () => {
    const resolved = resolveThemeOptions({
      labels: { latestPostsHeading: 'Latest' },
    });
    expect(resolved.labels.latestPostsHeading).toBe('Latest');
    expect(resolved.labels.footerRss).toBe('订阅 RSS');
  });

  it('overrides customCss', () => {
    const resolved = resolveThemeOptions({
      customCss: ['./custom.css'],
    });
    expect(resolved.customCss).toEqual(['./custom.css']);
  });
});