import TurndownService from 'turndown';
import { unified } from 'unified';
import remarkParse from 'remark-parse';
import remarkHtml from 'remark-html';

// Initialize Turndown for HTML to Markdown conversion
const turndownService = new TurndownService({
  headingStyle: 'atx',
  codeBlockStyle: 'fenced',
  fence: '```',
  emDelimiter: '_',
  strongDelimiter: '**',
  bulletListMarker: '-',
});

export function htmlToMarkdown(html: string): string {
  return turndownService.turndown(html);
}

// Convert markdown to HTML using remark
export async function markdownToHtml(markdown: string): Promise<string> {
  const file = await unified()
    .use(remarkParse)
    .use(remarkHtml, { sanitize: false })
    .process(markdown);
  
  return String(file);
}

// Synchronous version for TipTap initialization
export function markdownToHtmlSync(markdown: string): string {
  // For now, return the markdown as-is and let TipTap handle it
  // This will be processed asynchronously by the editor
  return markdown;
}