#!/usr/bin/env node
/**
 * Fix Glossary Translation Newlines
 *
 * The German and French glossary translations have all newlines collapsed
 * into single lines, making them unreadable. This script restores proper
 * markdown formatting by:
 *
 * 1. Detecting markdown structure markers (headings, lists, etc.)
 * 2. Inserting appropriate newlines
 * 3. Preserving paragraph breaks
 */

const fs = require('fs');
const path = require('path');

function fixMarkdownNewlines(content) {
  // Step 1: Normalize by removing frontmatter (we'll add it back later)
  const frontmatterMatch = content.match(/^---\n(.*?)\n---\n(.*)$/s);
  if (!frontmatterMatch) {
    console.error('No frontmatter found');
    return content;
  }

  const frontmatter = frontmatterMatch[1];
  let markdown = frontmatterMatch[2];

  // Step 2: Fix the main structural issues

  // Add newlines before and after ---
  markdown = markdown.replace(/\s*---\s*/g, '\n\n---\n\n');

  // Add newlines before ## headings
  markdown = markdown.replace(/\s+(##\s+)/g, '\n\n$1');

  // Add newline after ## headings (before next content)
  markdown = markdown.replace(/(##\s+[^\n]+)\s+/g, '$1\n\n');

  // Add newlines before ### headings
  markdown = markdown.replace(/\s+(###\s+)/g, '\n\n$1');

  // Add newline after ### headings
  markdown = markdown.replace(/(###\s+[^\n]+)\s+/g, '$1\n\n');

  // Add newlines before #### headings
  markdown = markdown.replace(/\s+(####\s+)/g, '\n\n$1');

  // Add newline after #### headings
  markdown = markdown.replace(/(####\s+[^\n]+)\s+/g, '$1\n\n');

  // Fix the # h1 (main title) - special case
  // The translation created: # Title\n- Rest **Bold:** text
  // We want: # Title - Rest\n\n**Bold:** text
  markdown = markdown.replace(/^(# [^\n-]+)\n-\s+([^\*\n]+)(\s+\*\*)/m, '$1 - $2\n\n$3');

  // Fix metadata lines (Version, Last Updated, etc.) - each on own line
  markdown = markdown.replace(/(\*\*[A-Za-zäöüÄÖÜß\s]+:\*\*\s+[0-9\-\.]+)(\s+)(\*\*)/g, '$1\n$3');
  markdown = markdown.replace(/(\*\*[A-Za-zäöüÄÖÜß\s]+:\*\*\s+[^*\n]+?)(\s+)(\*\*)/g, '$1\n$3');

  // Fix last metadata line before ---
  markdown = markdown.replace(/(\*\*[A-Za-zäöüÄÖÜß\s]+:\*\*\s+[^\n]+?)\s+(---)/g, '$1\n\n$2');

  // Add newlines before **What it means:**, **Why it matters:**, etc.
  markdown = markdown.replace(/\s+(\*\*Was\s+es\s+bedeutet:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Warum\s+es\s+wichtig\s+ist:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Wie\s+es\s+funktioniert:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Analogie\s+zur\s+realen\s+Welt:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Im?\s+Tractatus:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*In\s+Tractatus:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Beispiele:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Merkmale:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Persistenz:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Menschliche\s+Aufsicht:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Überprüfungshäufigkeit:)/gi, '\n\n$1');

  // French patterns
  markdown = markdown.replace(/\s+(\*\*Ce\s+que\s+cela\s+signifie\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Pourquoi\s+c'est\s+important\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Comment\s+cela\s+fonctionne\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Analogie\s+du\s+monde\s+réel\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Dans\s+Tractatus\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Exemples\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Caractéristiques\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Persistance\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Surveillance\s+humaine\s*:)/gi, '\n\n$1');
  markdown = markdown.replace(/\s+(\*\*Fréquence\s+de\s+révision\s*:)/gi, '\n\n$1');

  // Add newlines before list items (but only at start of line or after newline)
  markdown = markdown.replace(/([^\n])\s*\n?\s*(-\s+\*\*)/g, '$1\n\n$2');
  markdown = markdown.replace(/([^\n])\s+(-\s+[A-Z])/g, '$1\n$2');

  // Fix multiple consecutive newlines (max 2)
  markdown = markdown.replace(/\n{3,}/g, '\n\n');

  // Trim leading/trailing whitespace
  markdown = markdown.trim();

  // Step 3: Reassemble with frontmatter
  return `---\n${frontmatter}\n---\n\n${markdown}\n`;
}

async function main() {
  const baseDir = path.join(__dirname, '..');
  const deFile = path.join(baseDir, 'docs/markdown/GLOSSARY-DE.md');
  const frFile = path.join(baseDir, 'docs/markdown/GLOSSARY-FR.md');

  console.log('Fixing German glossary newlines...');
  const deContent = fs.readFileSync(deFile, 'utf-8');
  const deFixed = fixMarkdownNewlines(deContent);
  fs.writeFileSync(deFile, deFixed, 'utf-8');
  console.log('✓ German glossary fixed');

  console.log('\nFixing French glossary newlines...');
  const frContent = fs.readFileSync(frFile, 'utf-8');
  const frFixed = fixMarkdownNewlines(frContent);
  fs.writeFileSync(frFile, frFixed, 'utf-8');
  console.log('✓ French glossary fixed');

  console.log('\nDone! Now re-import documents to database with:');
  console.log('  npm run migrate:docs -- --source docs/markdown --force');
}

main().catch(console.error);