/**
 * Script to sync thumbnails from /thumbnails to /public/thumbnails
 * This allows static file serving for GHL hosting or static deployments
 */

import { readdir, copyFile, mkdir, stat } from 'fs/promises'
import { join } from 'path'
import { existsSync } from 'fs'

const PROJECT_ROOT = join(process.cwd(), '..')
const THUMBNAILS_SOURCE = join(PROJECT_ROOT, 'thumbnails')
const THUMBNAILS_PUBLIC = join(process.cwd(), 'public', 'thumbnails')

async function syncThumbnails() {
  try {
    // Check if source directory exists
    if (!existsSync(THUMBNAILS_SOURCE)) {
      console.log('⚠️  Thumbnails source directory not found, skipping...')
      return
    }

    // Create public/thumbnails directory structure
    if (!existsSync(THUMBNAILS_PUBLIC)) {
      await mkdir(THUMBNAILS_PUBLIC, { recursive: true })
    }

    /**
     * Recursively copy thumbnails, preserving directory structure
     */
    async function copyDirectory(sourceDir, destDir, relativePath = '') {
      const entries = await readdir(sourceDir, { withFileTypes: true })

      for (const entry of entries) {
        const sourcePath = join(sourceDir, entry.name)
        const destPath = join(destDir, entry.name)
        const entryRelativePath = relativePath ? join(relativePath, entry.name) : entry.name

        if (entry.isDirectory()) {
          // Create destination directory
          if (!existsSync(destPath)) {
            await mkdir(destPath, { recursive: true })
          }
          // Recursively copy subdirectories
          await copyDirectory(sourcePath, destPath, entryRelativePath)
        } else if (entry.isFile()) {
          // Copy image files (jpg, jpeg, png, webp)
          const ext = entry.name.toLowerCase()
          if (ext.endsWith('.jpg') || ext.endsWith('.jpeg') || ext.endsWith('.png') || ext.endsWith('.webp')) {
            // Check if file needs updating (compare modification times)
            let shouldCopy = true
            if (existsSync(destPath)) {
              const sourceStats = await stat(sourcePath)
              const destStats = await stat(destPath)
              shouldCopy = sourceStats.mtime > destStats.mtime
            }

            if (shouldCopy) {
              await copyFile(sourcePath, destPath)
              console.log(`Copied: ${entryRelativePath}`)
            }
          }
        }
      }
    }

    await copyDirectory(THUMBNAILS_SOURCE, THUMBNAILS_PUBLIC)

    console.log('✅ Thumbnails synced to public folder successfully!')
  } catch (error) {
    console.error('❌ Error syncing thumbnails:', error)
    process.exit(1)
  }
}

syncThumbnails()