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)]

allFiles.forEach(file => {
  const content = fs.readFileSync(file, 'utf-8')
  const { data, content: body } = matter(content)
  
  // Delete empty or almost empty files (like the bad PDF parses)
  if (body.trim().length < 50) {
    console.log(`🗑️ Deleting empty file: ${path.basename(file)}`)
    fs.unlinkSync(file)
    return
  }
  
  const filename = path.basename(file).toLowerCase()
  const title = (data.title || '').toLowerCase()
  
  const isKniepunkt = filename.includes('kniepunkt') || title.includes('kniepunkt')
  const targetDir = isKniepunkt ? KNIEPUNKT_DIR : POSTS_DIR
  const targetPath = path.join(targetDir, path.basename(file))
  
  // Adjust date for Kniepunkte (must be Sunday)
  if (isKniepunkt && data.date) {
    const d = new Date(data.date)
    const day = d.getDay()
    if (day !== 0) {
      // Shift to nearest Sunday (if Saturday, +1. If Monday, -1)
      const diff = day === 6 ? 1 : (day === 1 ? -1 : (day > 3 ? 7 - day : -day))
      d.setDate(d.getDate() + diff)
      data.date = d.toISOString().split('T')[0]
    }
  }
  
  // If it's the wrong directory or we need to update the date, rewrite it
  if (file !== targetPath || isKniepunkt) {
    console.log(`📦 Moving/Updating: ${path.basename(file)} -> ${isKniepunkt ? 'kniepunkt' : 'posts'}`)
    const newContent = matter.stringify(body, data)
    fs.writeFileSync(targetPath, newContent)
    if (file !== targetPath) {
      fs.unlinkSync(file)
    }
  }
})
console.log('✅ Cleanup complete!')