package com.scalawilliam.example.play

import play.api.libs.ws._

/**
 * Play's Scala WS library is very very cool. Provides you with plenty niceties.
 * See more: https://www.playframework.com/documentation/2.3.x/ScalaWS
 *
 * Unfortunately it by default requires a Play application context.
 * But you do not necessarily always want that.
 *
 * William Narmontas, Scala Consultant, London. UK
 * https://www.scalawilliam.com/
 */
object WSWithoutPlayApp extends App {

  class StandaloneWSAPI(wsClientConfig: WSClientConfig = DefaultWSClientConfig()) extends WSAPI with java.io.Closeable {

    import play.api.libs.ws.ning.{NingWSClient, NingAsyncHttpClientConfigBuilder}

    lazy val configuration = new NingAsyncHttpClientConfigBuilder(wsClientConfig).build()
    lazy val ningWsClient = new NingWSClient(configuration)
    override val client: WSClient = ningWsClient

    override def url(url: String): WSRequestHolder = client.url(url)

    def close(): Unit = {
      ningWsClient.close()
    }

  }

  val standaloneWSAPI = new StandaloneWSAPI()

  // Standard Play-style WSAPI
  val wsAPI: WSAPI = standaloneWSAPI

  def holder = {
    wsAPI.url("http://www.planetscala.com/atom.xml")
      .withHeaders("Accept" -> "application/xml")
      .withRequestTimeout(10000)
  }

  import scala.concurrent._
  import scala.concurrent.duration._
  import scala.concurrent.ExecutionContext.Implicits.global
  import scala.concurrent.Await

  def getPlanetScalaTitles: Future[Seq[String]] = {
    holder.get().map(_.xml \\ "title" map (_.text))
  }

  println("Here are the first ten Planet Scala titles:")
  try {
    Await.result(getPlanetScalaTitles, 10.seconds) take 10 foreach println
  } finally {
    // required, else there'll be threads hanging around
    // you might not care to do this though.
    standaloneWSAPI.close()
  }

}