import express from 'express'
import { createProxyMiddleware } from 'http-proxy-middleware'
import config from '../dev.config.json'

const { env, tenant } = config

export default function proxy(proxyPort: number, serverPort: number): void {
  const app = express()
  app.disable('x-powered-by')

  const proxyTarget = `https://${tenant}.${env}.com`
  const serverTarget = `http://localhost:${serverPort}`

  const proxyMiddleware = createProxyMiddleware({
    changeOrigin: true,
    target: serverTarget,
    router(_) {
      if (/^\/api/.test(_.path)) return proxyTarget

      return serverTarget
    },
    onProxyReq(req) {
      if (!req.path.includes('/api')) return

      req.removeHeader('origin')
      req.setHeader(
        'Cookie',
        '_ga=GA1.2.2091487000.1599129225; system_host=keytang; system_id=00000000-0000-0000-0000-000000000000; system_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOiIwMDAwMDAwMC0wMDAwLTAwMDAtMDAwMC0wMDAwMDAwMDAwMDAiLCJpYXQiOjE1NjA4MjUyNzcsImV4cCI6MTYyMzg5NzI2NSwidXNlclJvbGUiOjB9.3q2HXTkXzoDNfyHIanl_c-SH0UMvjXVxAbAMAkIwSxY; _gid=GA1.2.2062618537.1601018050'
      )
    },
  })

  app.use('/', proxyMiddleware)
  app.listen(proxyPort)
}