import fs from 'fs/promises';
import * as mdModule from '../src/services/markdownHtmlAgent';

describe('markdownHtmlAgent additional branches', () => {
  beforeEach(() => jest.resetAllMocks());

  it('ignores logo errors and proceeds without image', async () => {
    jest.spyOn(fs, 'readFile').mockRejectedValue(new Error('no file'));
    const html = await mdModule.markdownHtmlAgent({ title: 'X', markdown: '# A\n\nB', date: '2022-01-01' });
    expect(html).not.toMatch(/<img src="data:/);
    expect(html).toContain('<h1>X</h1>');
    expect(html).toContain('2022-01-01');
  });

  it('uses png mime type for .png logoPath', async () => {
    const buf = Buffer.from('ab');
    jest.spyOn(fs, 'readFile').mockResolvedValue(buf);
    const html = await mdModule.markdownHtmlAgent({ title: 'Y', markdown: 'M', logoPath: 'logo.png' });
    expect(html).toMatch(/data:image\/png;base64,/);
  });

  it('escapes HTML in code block when language is unknown', async () => {
    jest.spyOn(require('highlight.js'), 'getLanguage').mockReturnValue(undefined);
    const markdown = '# T\n```foo\n<>&\n```';
    const html = await mdModule.markdownHtmlAgent({ title: 'Z', markdown });
    expect(html).toContain('&lt;&gt;&amp;');
  });

  it('does not generate TOC for <=3 headings', async () => {
    const html = await mdModule.markdownHtmlAgent({ title: 'T', markdown: '#1\n##2\n###3' });
    expect(html).not.toContain('<nav class="toc">');
  });
});