/**
 * Runs in Node context.
 */

/**
 * Make sure to yarn add / npm install (in your project root)
 * anything you import here (except for express and compression).
 */
import express from 'express'
import compression from 'compression'
import {
  defineSsrCreate,
  defineSsrListen,
  defineSsrClose,
  defineSsrServeStaticContent,
  defineSsrRenderPreloadTag
} from '#q-app/wrappers'

/**
 * Create your webserver and return its instance.
 * If needed, prepare your webserver to receive
 * connect-like middlewares.
 *
 * Can be async: defineSsrCreate(async ({ ... }) => { ... })
 */
export const create = defineSsrCreate((/* { ... } */) => {
  const app = express()

  // attackers can use this header to detect apps running Express
  // and then launch specifically-targeted attacks
  app.disable('x-powered-by')

  // place here any middlewares that
  // absolutely need to run before anything else
  if (process.env.PROD) {
    app.use(compression())
  }

  return app
})

/**
 * You need to make the server listen to the indicated port
 * and return the listening instance or whatever you need to
 * close the server with.
 *
 * The "listenResult" param for the "close()" definition below
 * is what you return here.
 *
 * For production, you can instead export your
 * handler for serverless use or whatever else fits your needs.
 *
 * Can be async: defineSsrListen(async ({ app, devHttpsApp, port }) => { ... })
 */
export const listen = defineSsrListen(({ app, devHttpsApp, port }) => {
  const server = devHttpsApp || app
  return server.listen(port, () => {
    if (process.env.PROD) {
      console.log('Server listening at port ' + port)
    }
  })
})

/**
 * Should close the server and free up any resources.
 * Will be used on development only when the server needs
 * to be rebooted.
 *
 * Should you need the result of the "listen()" call above,
 * you can use the "listenResult" param.
 *
 * Can be async: defineSsrClose(async ({ listenResult }) => { ... })
 */
export const close = defineSsrClose(({ listenResult }) => {
  return listenResult.close()
})

const maxAge = process.env.DEV
  ? 0
  : 1000 * 60 * 60 * 24 * 30

/**
 * Should return a function that will be used to configure the webserver
 * to serve static content at "urlPath" from "pathToServe" folder/file.
 *
 * Notice resolve.urlPath(urlPath) and resolve.public(pathToServe) usages.
 *
 * Can be async: defineSsrServeStaticContent(async ({ app, resolve }) => {
 * Can return an async function: return async ({ urlPath = '/', pathToServe = '.', opts = {} }) => {
 */
export const serveStaticContent = defineSsrServeStaticContent(({ app, resolve }) => {
  return ({ urlPath = '/', pathToServe = '.', opts = {} }) => {
    const serveFn = express.static(resolve.public(pathToServe), { maxAge, ...opts })
    app.use(resolve.urlPath(urlPath), serveFn)
  }
})

const jsRE = /\.js$/
const cssRE = /\.css$/
const woffRE = /\.woff$/
const woff2RE = /\.woff2$/
const gifRE = /\.gif$/
const jpgRE = /\.jpe?g$/
const pngRE = /\.png$/

/**
 * Should return a String with HTML output
 * (if any) for preloading indicated file
 */
export const renderPreloadTag = defineSsrRenderPreloadTag((file/* , { ssrContext } */) => {
  if (jsRE.test(file) === true) {
    return `<link rel="modulepreload" href="${file}" crossorigin>`
  }

  if (cssRE.test(file) === true) {
    return `<link rel="stylesheet" href="${file}" crossorigin>`
  }

  if (woffRE.test(file) === true) {
    return `<link rel="preload" href="${file}" as="font" type="font/woff" crossorigin>`
  }

  if (woff2RE.test(file) === true) {
    return `<link rel="preload" href="${file}" as="font" type="font/woff2" crossorigin>`
  }

  if (gifRE.test(file) === true) {
    return `<link rel="preload" href="${file}" as="image" type="image/gif" crossorigin>`
  }

  if (jpgRE.test(file) === true) {
    return `<link rel="preload" href="${file}" as="image" type="image/jpeg" crossorigin>`
  }

  if (pngRE.test(file) === true) {
    return `<link rel="preload" href="${file}" as="image" type="image/png" crossorigin>`
  }

  return ''
})

export function <functionName> ({
  app, port, isReady, ssrHandler,
  resolve, publicPath, folders, render, serve
}) => {

{
  app,     // Expressjs app instance (or whatever you return from create())

  port,    // on production: process∙env∙PORT or quasar.config file > ssr > prodPort
           // on development: quasar.config file > devServer > port

  isReady, // Function to call returning a Promise
           // when app is ready to serve clients

  ssrHandler, // Prebuilt app handler if your serverless service
              // doesn't require a specific way to provide it.
              // Form: ssrHandler (req, res, next)
              // Tip: it uses isReady() under the hood already

  // all of the following are the same as
  // for the SSR middlewares (check its docs page);
  // normally you don't need these here
  // (use a real SSR middleware instead)
  resolve: {
    urlPath(path)
    root(arg1, arg2),
    public(arg1, arg2)
  },
  publicPath, // String
  folders: {
    root,     // String
    public    // String
  },
  render(ssrContext),
  serve: {
    static({ urlPath, pathToServe, opts }),
    error({ err, req, res })
  }
}

import { defineSsrCreate } from '#q-app/wrappers'
import connect from 'connect'
import compression from 'compression'

export const create = defineSsrCreate((/* { ... } */) => {
  const app = connect()

  // place here any middlewares that
  // absolutely need to run before anything else
  if (process.env.PROD) {
    app.use(compression())
  }

  return app
})

export const listen = defineSsrListen(({ app, devHttpsApp, port }) => {
  const server = devHttpsApp || app;
  return server.listen(port, () => {
    if (process.env.PROD) {
      console.log('Server listening at port ' + port);
    }
  });
})

import { defineSsrListen } from '#q-app/wrappers'
export const listen = defineSsrListen(({ app, devHttpsApp, port }) => {
  if (process.env.DEV) {
    // for dev, start listening on the created server
    const server = devHttpsApp || app;
    return server.listen(port, () => {
      // we're ready to serve clients
    })
  }
  else { // in production
    // return an object with a "handler" property
    // that the server script will named-export
    return { handler: app }
  }
})

import { defineSsrListen } from '#q-app/wrappers'
import serverless from 'serverless-http'

export const listen = defineSsrListen(({ app, devHttpsApp, port }) => {
  if (process.env.DEV) {
    // for dev, start listening on the created server
    const server = devHttpsApp || app;
    return server.listen(port, () => {
      // we're ready to serve clients
    })
  }
  else { // in production
    return { handler: serverless(ssrHandler) }
  }
})

import { defineSsrListen } from '#q-app/wrappers'
import * as functions from 'firebase-functions'

export const listen = defineSsrListen(({ app, devHttpsApp, port }) => {
  if (process.env.DEV) {
    // for dev, start listening on the created server
    const server = devHttpsApp || app;
    return server.listen(port, () => {
      // we're ready to serve clients
    })
  }
  else { // in production
    return {
      handler: functions.https.onRequest(ssrHandler)
    }
  }
})