import { defineEventHandler, getCookie, getRequestHeaders, getRequestURL, readBody } from 'h3'

const API_ORIGIN = process.env.API_ORIGIN as string

export default defineEventHandler(async (event) => {
  const { method } = event.node.req
  const headers = getRequestHeaders(event)
  const url = getRequestURL(event)
  const pathname = url.pathname.replace(/^\/api/, '')

  const targetUrl = API_ORIGIN + pathname + (url.search || '')

  const verificationId = headers['verification-id'] as string | undefined
  let bearer = ''
  if (verificationId) {
    bearer = getCookie(event, `Verification-${verificationId}`) || ''
    if (!bearer) bearer = getCookie(event, 'authentication') || ''
  } else {
    bearer = getCookie(event, 'authentication') || ''
  }

  const forwardHeaders = new Headers()
  if (headers['content-type']) forwardHeaders.set('Content-Type', headers['content-type'])
  forwardHeaders.set('Authorization', `Bearer ${bearer}`)

  let body: any = undefined
  if (['POST', 'PATCH'].includes(method!)) {
    if (headers['content-type']?.includes('multipart/form-data')) {
      body = await readBody(event)
    } else {
      body = await readBody(event)
      forwardHeaders.set('Content-Type', 'application/json')
      body = JSON.stringify(body)
    }
  }

  const res = await fetch(targetUrl, {
    method,
    headers: forwardHeaders,
    body,
  })

  return res
})