jmonkey-test/src/main/scala/wow/doge/mygame/game/entities/CharacterStats.scala

package wow.doge.mygame.game.entities

import akka.actor.typed.ActorRef
import akka.actor.typed.Behavior
import akka.actor.typed.scaladsl.ActorContext
import akka.actor.typed.scaladsl.Behaviors
import cats.Show
import cats.kernel.Eq
import io.estatico.newtype.macros.newtype

final case class CharacterStats(
    hp: CharacterStats.Health,
    stamina: CharacterStats.Stamina
)
object CharacterStats {
  @newtype final case class HealHealth(toInt: Int)
  @newtype final case class DamageHealth(toInt: Int)
  @newtype final case class Health(toInt: Int)
  object Health {
    implicit class HealthOps(private val h: Health) extends AnyVal {
      def :+(v: HealHealth): Health = Health(h.toInt + v.toInt)
      def -(v: DamageHealth): Health = Health(h.toInt - v.toInt)
    }
  }
  @newtype final case class HealStamina(toInt: Int)
  @newtype final case class DamageStamina(toInt: Int)
  @newtype final case class Stamina(toInt: Int)
  object Stamina {
    implicit class StaminaOps(private val h: Stamina) extends AnyVal {
      def :+(v: HealStamina): Stamina = Stamina(h.toInt + v.toInt)
      def -(v: DamageStamina): Stamina = Stamina(h.toInt - v.toInt)
    }
  }

  implicit val show = Show.fromToString[CharacterStats]
  implicit val eq = Eq.fromUniversalEquals[CharacterStats]

}

object StatsActor {
  import CharacterStats._

  sealed trait Status
  object Status {
    case object Alive extends Status
    case object Dead extends Status
  }

  sealed trait Command
  final case class TakeDamageResult(
      value: CharacterStats.DamageHealth,
      replyTo: ActorRef[(Status, CharacterStats)]
  ) extends Command
  final case class ConsumeStaminaResult(
      value: CharacterStats.DamageStamina,
      replyTo: ActorRef[(Status, CharacterStats)]
  ) extends Command
  final case class HealHealthResult(
      value: HealHealth,
      replyTo: ActorRef[CharacterStats]
  ) extends Command

  final case class HealStaminaResult(
      value: HealStamina,
      replyTo: ActorRef[CharacterStats]
  ) extends Command
  final case class CurrentStats(replyTo: ActorRef[CharacterStats])
      extends Command

  class Props(
      startingHealth: CharacterStats.Health,
      startingStamina: CharacterStats.Stamina
  ) {
    def behavior =
      Behaviors.setup[Command] { ctx =>
        new StatsActor(ctx, this)
          .receive(
            State(CharacterStats(startingHealth, startingStamina))
          )
      }
  }

  final case class State(stats: CharacterStats)
}
class StatsActor(
    ctx: ActorContext[StatsActor.Command],
    props: StatsActor.Props
) {
  import StatsActor._
  import CharacterStats._
  import com.softwaremill.quicklens._
  def receive(state: State): Behavior[Command] =
    Behaviors.receiveMessage[Command] {
      // Todo add min max values
      //   case TakeDamage(value) =>
      //     val nextState =
      //       if (state.stats.hp - value <= 0)
      //         state.modify(_.stats.hp).setTo(0)
      //       else
      //         state.modify(_.stats.hp).using(_ - value)
      //     receive(nextState)
      case TakeDamageResult(value, replyTo) =>
        val nextState = if ((state.stats.hp - value).toInt <= 0) {
          val s = state.modify(_.stats.hp).setTo(Health(0))
          replyTo ! Status.Dead -> s.stats
          s
        } else {
          val s = state.modify(_.stats.hp).using(_ - value)
          replyTo ! Status.Alive -> s.stats
          s
        }
        receive(nextState)
      case ConsumeStaminaResult(value, replyTo) =>
        val nextState = if ((state.stats.stamina - value).toInt <= 0) {
          val s = state.modify(_.stats.stamina).setTo(Stamina(0))
          replyTo ! Status.Alive -> s.stats
          s
        } else {
          val s = state.modify(_.stats.stamina).using(_ - value)
          replyTo ! Status.Alive -> s.stats
          s
        }
        receive(nextState)
      case HealHealthResult(value, replyTo) =>
        val nextState = receive(state.modify(_.stats.hp).using(_ :+ value))
        replyTo ! state.stats
        nextState

      case HealStaminaResult(value, replyTo) =>
        val nextState = receive(state.modify(_.stats.stamina).using(_ :+ value))
        replyTo ! state.stats
        nextState

      case CurrentStats(replyTo) =>
        replyTo ! state.stats
        Behaviors.same
    }
}