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const Koa = require('koa')
const { Nuxt, Builder } = require('nuxt')

const app = new Koa()
const port = process.env.PORT || 3000


// Import and Set Nuxt.js options
let config = require('../nuxt.config.js')
config.dev = process.env.NODE_ENV !== 'production'


  // Instantiate nuxt.js
  const nuxt = new Nuxt(config)

  if (config.dev) {
    new Builder(nuxt).build()
      .then(listen)
      .catch((error) => {
        console.error(error)
        process.exit(1)
      })
  }
  else
  {
    app.use(ctx => {
      ctx.status = 200 // koa defaults to 404 when it sees that status is unset
  
      return new Promise((resolve, reject) => {
        ctx.res.on('close', resolve)
        ctx.res.on('finish', resolve)
        nuxt.render(ctx.req, ctx.res, promise => {
          // nuxt.render passes a rejected promise into callback on error.
          promise.then(resolve).catch(reject)
        })
      })
    })
  }

  

  app.listen(port)