import http from 'http'

const listenPort = Number(process.env.WIZARD_PORT || 8080)
const targetHost = process.env.WIZARD_HOST || 'wizard'
const targetPort = Number(process.env.WIZARD_PORT || 8080)

http
  .createServer((req, res) => {
    const proxyReq = http.request(
      {
        hostname: targetHost,
        port: targetPort,
        path: req.url,
        method: req.method,
        headers: req.headers,
      },
      (proxyRes) => {
        res.writeHead(proxyRes.statusCode || 502, proxyRes.headers)
        proxyRes.pipe(res)
      }
    )

    proxyReq.on('error', (err) => {
      res.statusCode = 502
      res.end(`Bad gateway: ${err.message}`)
    })

    req.pipe(proxyReq)
  })
  .listen(listenPort, '127.0.0.1', () => {
    console.log(`wizard proxy listening on 127.0.0.1:${listenPort} -> ${targetHost}:${targetPort}`)
  })