import { NextRequest, NextResponse } from 'next/server'
import { writeFile, mkdir } from 'node:fs/promises'
import path from 'node:path'
import { readConfig } from '@/utils/config'

export const runtime = 'nodejs'

export async function POST(req: NextRequest) {
  const password = req.headers.get('x-admin-password') || ''
  const config = await readConfig()

  if (password !== config.adminPassword) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const formData = await req.formData()
  const csvFile = formData.get('csv') as File | null
  const logoFile = formData.get('logo') as File | null

  const results: { csv?: string; logo?: string; error?: string } = {}

  if (csvFile) {
    try {
      const buffer = await csvFile.arrayBuffer()
      const csvDir = path.join(process.cwd(), 'src', 'data')
      await mkdir(csvDir, { recursive: true })
      const csvPath = path.join(csvDir, csvFile.name)
      await writeFile(csvPath, Buffer.from(buffer))
      results.csv = `✓ CSV uploaded: ${csvFile.name}`
    } catch (e: any) {
      results.error = `CSV upload failed: ${e.message}`
    }
  }

  if (logoFile) {
    try {
      const buffer = await logoFile.arrayBuffer()
      const logoDir = path.join(process.cwd(), 'public', 'branding')
      await mkdir(logoDir, { recursive: true })
      const logoPath = path.join(logoDir, logoFile.name)
      await writeFile(logoPath, Buffer.from(buffer))
      results.logo = `✓ Logo uploaded: ${logoFile.name}`
    } catch (e: any) {
      results.error = `Logo upload failed: ${e.message}`
    }
  }

  if (!csvFile && !logoFile) {
    return NextResponse.json({ error: 'No files provided' }, { status: 400 })
  }

  if (results.error) {
    return NextResponse.json(results, { status: 500 })
  }

  return NextResponse.json(results)
}