import fs from 'fs'
import path from 'path'
import matter from 'gray-matter'

const CONTENT_DIR = path.join(process.cwd(), 'content')
const KNIEPUNKT_DIR = path.join(CONTENT_DIR, 'kniepunkt')
const POSTS_DIR = path.join(CONTENT_DIR, 'posts')

function getFiles(dir) {
  return fs.readdirSync(dir).map(f => path.join(dir, f)).filter(f => f.endsWith('.md'))
}

const allFiles = [...getFiles(KNIEPUNKT_DIR), ...getFiles(POSTS_DIR)]

function decodeEntities(str) {
  if (!str) return str
  return str
    .replace(/&/g, '&')
    .replace(/&lt;/g, '<')
    .replace(/&gt;/g, '>')
    .replace(/&quot;/g, '"')
    .replace(/&#39;/g, "'")
    .replace(/&#039;/g, "'")
    .replace(/&nbsp;/g, ' ')
}

allFiles.forEach(file => {
  if (fs.existsSync(file)) {
    const raw = fs.readFileSync(file, 'utf8')
    // Fast check
    if (raw.includes('&#') || raw.includes('&quot;') || raw.includes('&amp;')) {
      const data = matter(raw)
      let changed = false
      
      if (data.data.title && (data.data.title.includes('&#') || data.data.title.includes('&quot;'))) {
        data.data.title = decodeEntities(data.data.title)
        changed = true
      }
      
      const newContent = decodeEntities(data.content)
      if (newContent !== data.content) {
        data.content = newContent
        changed = true
      }
      
      if (changed) {
        fs.writeFileSync(file, matter.stringify(data.content, data.data))
        console.log(`📝 Fixed entities in ${path.basename(file)}`)
      }
    }
  }
})