jmonkey-test/src/main/scala/wow/doge/mygame/utils/ReaderDemo.scala

package wow.doge.mygame.utils
import cats.data.Reader
import cats.data.ReaderT
import monix.bio.UIO

object ReaderDemo {

  type IoReaderT[S, E, A] = ReaderT[UIO, S, Either[E, A]]
  val IoReaderT = ReaderT
  val t =
    ReaderT[UIO, String, Either[Error, Unit]](s => UIO.unit.attempt)
      .run("s")
      .rethrow
  val r: IoReaderT[String, Error, Unit] = IoReaderT(s => UIO.unit.attempt)
  val t2 = r.run("s").rethrow
  // Kleisli[IO, String, Unit](s => IO.unit)

  case class Environment(str: String, num: Int)

  def fun1: Reader[String, UIO[Unit]] = Reader(str => UIO(println(str)))
  def fun2: Reader[Int, UIO[Unit]] = Reader(num => UIO(println(num)))

  def total: Reader[Environment, UIO[Unit]] =
    for {
      x <- fun1.local[Environment](_.str)
      y <- fun2.local[Environment](_.num)
    } yield UIO.parSequence(List(x, y)).void

  val io: UIO[Unit] = total.run(Environment("hello", 50))

}