package controllers

import play.api.libs.ws.WS
import play.api.mvc.{Action, Controller}

import scala.concurrent.Future

class VerifyCredentialsController extends Controller {
  implicit val context = scala.concurrent.ExecutionContext.Implicits.global

  def verify = Action.async(parse.multipartFormData) { request =>
    val urlOpt = request.headers.get("X-Auth-Service-Provider")
    val tokenOpt = request.headers.get("X-Verify-Credentials-Authorization")

    getTwitterUserId(urlOpt, tokenOpt).map { user =>
      user match {
        case Some(id) =>
          // Do something interesting here here
          Ok("Success")
        case None => Unauthorized("Failure")
      }
    }
  }

  def getTwitterUserId(urlOpt: Option[String], tokenOpt: Option[String]): Future[Option[Long]] = {
    (urlOpt, tokenOpt) match {
      case (Some(url), Some(token)) => executeVerifyCredentialsResquest(url, token)
      case _ => Future.successful(None)
    }
  }

  def executeVerifyCredentialsResquest(url: String, token: String): Future[Option[Long]] = {
    WS.url(url).withHeaders("Authorization" -> token).get.map { response =>
      response.status match {
        case 200 => (response.json \ "id").asOpt[Long]
        case _ => None
      }
    }
  }
}