import { NextApiRequest, NextApiResponse } from 'next'
import { SerialPort } from 'serialport'

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  if (req.method !== 'GET') {
    return res.status(405).json({ message: 'Method not allowed' })
  }

  try {
    const ports = await SerialPort.list()
    
    // Filter for ESP32 devices (common VID/PID patterns)
    const esp32Ports = ports.filter(port => 
      port.vendorId === '10C4' || // Silicon Labs CP210x
      port.vendorId === '1A86' || // QinHeng Electronics CH340
      port.vendorId === '0403' ||  // FTDI
      port.manufacturer?.includes('Silicon Labs') ||
      port.manufacturer?.includes('FTDI') ||
      port.productId === 'EA60'    // CP2102
    )

    res.status(200).json({
      allPorts: ports,
      esp32Ports,
      count: esp32Ports.length
    })
  } catch (error) {
    console.error('Error listing serial ports:', error)
    res.status(500).json({ 
      message: 'Failed to list serial ports',
      error: error instanceof Error ? error.message : 'Unknown error'
    })
  }
}