/**
 * index.ts 单元测试
 * 覆盖全局 API：create / use / on / off / setTheme / setLocale / destroy / getStatus
 */

import MeEditor, {
  create, use, on, off, setTheme, setLocale, destroy, getStatus,
  parseMarkdown, parseTokens, renderTokens, safeUrl, slugify, clearRenderCache,
  registerBlockHandler, topologicalSort, validateConfig,
  VERSION,
} from '../src/index';
import { MarkdownEditor } from '../src/core';

describe('index.ts - 全局 API', () => {
  let container: HTMLElement;

  beforeEach(() => {
    document.body.innerHTML = '';
    container = document.createElement('div');
    container.id = 'test-host';
    document.body.appendChild(container);
    // Set MeEditor on window as index.ts does
    (window as any).MeEditor = MeEditor;
  });

  afterEach(() => {
    document.body.innerHTML = '';
  });

  test('VERSION 是字符串', () => {
    expect(typeof VERSION).toBe('string');
    expect(VERSION).toBe('0.4.2');
  });

  test('api.default 是 api 本身', () => {
    expect(MeEditor).toBeDefined();
    expect(MeEditor.VERSION).toBe(VERSION);
  });

  test('create 创建编辑器实例', () => {
    const editor = create('#test-host', { value: '# Hello' });
    expect(editor).toBeInstanceOf(MarkdownEditor);
    expect(editor.getValue()).toBe('# Hello');
    editor.destroy();
  });

  test('create 接受 HTMLElement', () => {
    const editor = create(container, { value: 'text' });
    expect(editor.getValue()).toBe('text');
    editor.destroy();
  });

  test('use 注册全局插件（通过字符串）', () => {
    const result = use('autoSave', { delay: 100 });
    expect(result).toBe(MeEditor); // 返回 api（链式）
    const status = getStatus();
    expect(status.globalPlugins).toContain('autoSave');
  });

  test('use 未知预设插件 warn', () => {
    const spy = jest.spyOn(console, 'warn').mockImplementation(() => {});
    use('non-existent-preset');
    expect(spy).toHaveBeenCalled();
    spy.mockRestore();
  });

  test('use 无效插件对象 warn', () => {
    const spy = jest.spyOn(console, 'warn').mockImplementation(() => {});
    use(null);
    expect(spy).toHaveBeenCalled();
    spy.mockRestore();
  });

  test('全局插件被注入到新实例', () => {
    // Reset global plugins by destroying
    destroy();
    use('autoSave');
    const ed = create(container, { value: 'test' });
    const plugins = ed.getPlugins();
    expect(plugins.some((p: any) => p.name === 'autoSave')).toBe(true);
    ed.destroy();
  });

  test('全局 searchReplace 在新实例上可用（DOM 已就绪）', () => {
    destroy();
    use('searchReplace');
    const ed = create(container, { value: 'foo bar' });
    ed.textarea.dispatchEvent(new KeyboardEvent('keydown', { key: 'f', ctrlKey: true, bubbles: true }));
    expect(ed.el.querySelector('.me-search')).not.toBeNull();
    ed.destroy();
  });

  test('全局插件与 config.plugins 同名时只安装一次', () => {
    destroy();
    use('autoSave');
    const ed = create(container, { value: 'test', plugins: ['autoSave'] });
    const count = ed.getPlugins().filter((p: any) => p.name === 'autoSave').length;
    expect(count).toBe(1);
    ed.destroy();
  });

  test('on / off 全局钩子', () => {
    const fn = jest.fn();
    const unsub = on('afterCreate', fn);
    expect(typeof unsub).toBe('function');
    const ed = create(container, {});
    expect(fn).toHaveBeenCalled();
    off('afterCreate', fn);
    ed.destroy();
  });

  test('setTheme 切换全局主题', () => {
    expect(() => setTheme('dark')).not.toThrow();
  });

  test('setLocale 切换全局语言', () => {
    expect(() => setLocale('en-US')).not.toThrow();
  });

  test('getStatus 返回状态对象', () => {
    const status = getStatus();
    expect(status).toHaveProperty('version');
    expect(status).toHaveProperty('theme');
    expect(status).toHaveProperty('locale');
    expect(status).toHaveProperty('globalPlugins');
    expect(status).toHaveProperty('presetPlugins');
    expect(Array.isArray(status.globalPlugins)).toBe(true);
    expect(Array.isArray(status.presetPlugins)).toBe(true);
  });

  test('destroy 清理全局资源', () => {
    destroy();
    const status = getStatus();
    expect(status.globalPlugins.length).toBe(0);
  });

  test('destroy 清理用户全局钩子但保留内部注入钩子', () => {
    destroy();
    const fn = jest.fn();
    on('afterCreate', fn);
    expect(MarkdownEditor._hooks.get('afterCreate')!.length).toBeGreaterThan(0);
    destroy();
    const hooks = MarkdownEditor._hooks.get('afterCreate') || [];
    expect(hooks.length).toBe(1); // 仅剩内部 injectGlobalPlugins
    expect(hooks[0]).not.toBe(fn);
  });

  test('destroy 后 MeEditor.use 全局插件仍可用', () => {
    destroy();
    use('autoSave');
    const ed = create(container, { value: 'x' });
    expect(ed.getPlugins().some((p: any) => p.name === 'autoSave')).toBe(true);
    ed.destroy();
  });

  test('window.MeEditor 被设置', () => {
    expect((window as any).MeEditor).toBeDefined();
    expect((window as any).MeEditor.VERSION).toBe(VERSION);
  });
});

describe('index.ts - 解析器导出', () => {
  test('parseMarkdown 可直接调用', () => {
    const html = parseMarkdown('# Hello');
    expect(html).toContain('<h1');
  });

  test('parseTokens 可直接调用', () => {
    const { tokens, footnotes, refs } = parseTokens('# Hi\n\n**bold**');
    expect(Array.isArray(tokens)).toBe(true);
    expect(tokens.length).toBeGreaterThan(0);
    expect(typeof footnotes).toBe('object');
    expect(typeof refs).toBe('object');
  });

  test('renderTokens 可直接调用', () => {
    const { tokens } = parseTokens('**hello**');
    const html = renderTokens(tokens);
    expect(html).toContain('<strong>');
  });

  test('safeUrl 过滤危险协议', () => {
    expect(safeUrl('javascript:alert(1)')).toBe('');
    expect(safeUrl('https://example.com')).toBe('https://example.com');
  });

  test('slugify 生成锚点 id', () => {
    expect(slugify('Hello World')).toBe('hello-world');
  });

  test('clearRenderCache 不抛错', () => {
    expect(() => clearRenderCache()).not.toThrow();
  });

  test('registerBlockHandler 注册自定义块', () => {
    let matched = false;
    registerBlockHandler({
      name: 'testBlockIndex',
      priority: 50,
      test: (line) => { if (line === '!!!custom!!!') { matched = true; return true; } return null; },
      parse: (_l, i) => ({ token: { type: 'testBlockIndex', content: 'hit' }, newIndex: i + 1 }),
    });
    const html = parseMarkdown('!!!custom!!!\nafter');
    // 自定义 handler 被真实命中并产出 token（回退渲染为 me-block-* div）
    expect(matched).toBe(true);
    expect(html).toContain('me-block-testBlockIndex');
  });
});

describe('index.ts - 具名导出', () => {
  test('create 是函数', () => expect(typeof create).toBe('function'));
  test('use 是函数', () => expect(typeof use).toBe('function'));
  test('on 是函数', () => expect(typeof on).toBe('function'));
  test('off 是函数', () => expect(typeof off).toBe('function'));
  test('setTheme 是函数', () => expect(typeof setTheme).toBe('function'));
  test('setLocale 是函数', () => expect(typeof setLocale).toBe('function'));
  test('destroy 是函数', () => expect(typeof destroy).toBe('function'));
  test('getStatus 是函数', () => expect(typeof getStatus).toBe('function'));
  test('topologicalSort 是函数', () => expect(typeof topologicalSort).toBe('function'));
  test('validateConfig 是函数', () => expect(typeof validateConfig).toBe('function'));
});