import { NextRequest, NextResponse } from 'next/server'
import { writeFile, mkdir } from 'fs/promises'
import { join } from 'path'
import { existsSync } from 'fs'

export async function POST(request: NextRequest) {
  try {
    const data = await request.formData()
    const files: File[] = data.getAll('files') as File[]

    if (!files || files.length === 0) {
      return NextResponse.json({ error: 'No files uploaded' }, { status: 400 })
    }

    const uploadedUrls: string[] = []

    for (const file of files) {
      if (!file.type.startsWith('image/')) {
        return NextResponse.json({ error: 'Only image files are allowed' }, { status: 400 })
      }

      const bytes = await file.arrayBuffer()
      const buffer = new Uint8Array(bytes)

      // Create products directory if it doesn't exist
      const productsDir = join(process.cwd(), 'public', 'products')
      if (!existsSync(productsDir)) {
        await mkdir(productsDir, { recursive: true })
      }

      // Generate unique filename
      const timestamp = Date.now()
      const filename = `${timestamp}-${file.name.replace(/[^a-zA-Z0-9.-]/g, '_')}`
      const filepath = join(productsDir, filename)

      // Write file to public/products directory
      await writeFile(filepath, buffer)

      // Add to uploaded URLs (relative path for use in app)
      uploadedUrls.push(`/products/${filename}`)
    }

    return NextResponse.json({ 
      success: true, 
      urls: uploadedUrls,
      message: `${uploadedUrls.length} file(s) uploaded successfully`
    })

  } catch (error) {
    console.error('Upload error:', error)
    return NextResponse.json(
      { error: 'Failed to upload files' },
      { status: 500 }
    )
  }
}