trait Config {
  val dbType: String
  val serviceEndpoint: String
}

class ProdConfig extends Config {
  val dbType = "Production"
  val serviceEndpoint = "linkedin.com"
}

trait Controller
trait Service

class Controller1(serviceEndpoint: String, service1: Service1)
  extends Controller {
  println(serviceEndpoint)
}

class Controller2(serviceEndpoint: String, service1: Service1, service2: Service2)
  extends Controller {
  println(serviceEndpoint)
}

class Service1(dbType: String) extends Service {
  println(dbType)
}

class Service2(dbType: String) extends Service {
  println(dbType)
}

def service1 = Reader((c: Config) => new Service1(c.dbType))
def service2 = Reader((c: Config) => new Service2(c.dbType))

def controller1(s: Service1) = Reader[Config, Controller1] {
  c => new Controller1(c.serviceEndpoint, s)
}

def controller2(s1: Service1, s2: Service2) = Reader[Config, Controller2] {
  c => new Controller2(c.serviceEndpoint, s1, s2)
}

println("Faking a context.register call")
val cfg = new ProdConfig

val controllers = Reader[Config, (Controller1, Controller2)] {
  c => for {
    s1 <- service1
    s2 <- service2
    c1 <- controller1(s1)
    c2 <- controller2(s1,s2)
  } yield(c1, c2)
}

println(controllers.run(cfg))