// @flow

/* eslint-disable import/no-extraneous-dependencies, import/no-dynamic-require, global-require */

import colors from 'colors/safe'
import exitHook from 'exit-hook'

// flow-disable-next-line
import { NODE_ENV, PORT, TESTING_PORT, IS_TEST_ENV, IS_LOCAL_ENV_TYPE, ENV_TYPE } from '@sharyn/env'
import {
  appRoot,
  hasFile,
  hasPackage,
  requireCascadeFromSource,
  pathCascade,
  // flow-disable-next-line
} from '@sharyn/check-setup'
// flow-disable-next-line
const Koa = hasPackage('koa', true) && require(`${appRoot}/node_modules/koa`)
// flow-disable-next-line
const Router = hasPackage('koa-router', true) && require(`${appRoot}/node_modules/koa-router`)

const router = new Router()

const PREFIX = colors.cyan('[sharyn/koa]')

export const DEFAULT_PORT = 8020
export const DEFAULT_TESTING_PORT = 8021

const port = IS_TEST_ENV ? TESTING_PORT || DEFAULT_TESTING_PORT : PORT || DEFAULT_PORT

let server

const stopServer_ = (options?: Object) => {
  if (server) {
    if (!(options?.silent || IS_TEST_ENV)) {
      // eslint-disable-next-line no-console
      console.log() // cross-os newline
      // eslint-disable-next-line no-console
      console.log(`${PREFIX} Server stopped`)
    }
    if (hasPackage('@sharyn/db')) {
      // flow-disable-next-line
      require('@sharyn/db').knex.destroy()
    }
    if (hasPackage('@sharyn/redis')) {
      // flow-disable-next-line
      require('@sharyn/redis').quit()
    }
    return server.close()
  }
  throw Error('Tried to stop the server but no server was running')
}

const startServer_ = (manualRouting: Function, options?: Object) => {
  const routing =
    manualRouting || requireCascadeFromSource('_server/routing.js', 'server/routing.js')
  if (!routing) {
    throw Error(
      'You must pass a routing function to startServer, or have a _server/routing.js file exporting the routing function',
    )
  }

  if (!(options?.silent || IS_TEST_ENV)) {
    // eslint-disable-next-line no-console
    console.log(
      `\n${PREFIX} 🌹 Server running on PORT: ${port} | NODE_ENV: ${NODE_ENV} | ENV_TYPE: ${ENV_TYPE}`,
    )
  }

  exitHook(() => stopServer_())

  const app = new Koa()

  if (hasPackage('koa-sslify')) {
    // flow-disable-next-line
    const enforceHttps = require('koa-sslify')
    const hasHeroku = hasFile('Procfile')
    IS_LOCAL_ENV_TYPE || app.use(enforceHttps({ trustProtoHeader: hasHeroku }))
  }

  if (hasPackage('koa-compress')) {
    // flow-disable-next-line
    app.use(require('koa-compress')())
  }

  if (hasPackage('koa-mount') && hasPackage('koa-static')) {
    // flow-disable-next-line
    const mount = require('koa-mount')
    // flow-disable-next-line
    const serveStatic = require('koa-static')
    app.use(mount('/static', serveStatic('dist'))).use(mount('/static', serveStatic('public')))
  }

  if (hasPackage('koa-favicon')) {
    app.use(
      // flow-disable-next-line
      require('koa-favicon')(
        `./${pathCascade(
          'public/img/favicon/favicon.ico',
          'public/img/favicon.ico',
          'public/favicon.ico',
        )}`,
      ),
    )
  }

  routing(router)
  app.use(router.routes()).use(router.allowedMethods())

  server = app.listen(options?.port || port)
}

export const startServer = startServer_
export const stopServer = stopServer_