/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

// @ts-ignore
import proxy from 'proxy'
import { readFileSync } from 'fs'
import { join } from 'path'
import * as http from 'http'
import * as https from 'https'

export const ssl = {
  key: readFileSync(join(__dirname, '..', 'fixtures', 'https.key')),
  cert: readFileSync(join(__dirname, '..', 'fixtures', 'https.cert'))
}

type AuthenticateFn = (err: Error | null, valid: boolean) => void
interface ProxyServer extends http.Server {
  authenticate?(req: http.IncomingMessage, fn: AuthenticateFn): void
}

export function createProxy (): Promise<ProxyServer> {
  return new Promise((resolve, reject) => {
    const server = proxy(http.createServer())
    server.listen(0, '127.0.0.1', () => {
      resolve(server)
    })
  })
}

export function createSecureProxy (): Promise<ProxyServer> {
  return new Promise((resolve, reject) => {
    const server = proxy(https.createServer(ssl))
    server.listen(0, '127.0.0.1', () => {
      resolve(server)
    })
  })
}

export function createServer (): Promise<http.Server> {
  return new Promise((resolve, reject) => {
    const server = http.createServer()
    server.listen(0, '127.0.0.1', () => {
      resolve(server)
    })
  })
}

export function createSecureServer (): Promise<http.Server> {
  return new Promise((resolve, reject) => {
    const server = https.createServer(ssl)
    server.listen(0, '127.0.0.1', () => {
      resolve(server)
    })
  })
}