jmonkey-test/src/main/scala/wow/doge/mygame/executors/GUIExecutor.scala

package wow.doge.mygame.executors

import java.util.Collections
import java.util.concurrent.AbstractExecutorService
import java.util.concurrent.Executor
import java.util.concurrent.ExecutorService
import java.util.concurrent.ThreadFactory
import java.util.concurrent.TimeUnit
import javax.swing.SwingUtilities

import scala.concurrent.ExecutionContext

import akka.dispatch.DispatcherPrerequisites
import akka.dispatch.ExecutorServiceConfigurator
import akka.dispatch.ExecutorServiceFactory
import com.typesafe.config.Config
import javafx.application.Platform
import monix.execution.Scheduler

// First we wrap invokeLater/runLater as an ExecutorService
trait GUIExecutorService extends AbstractExecutorService {
  def execute(command: Runnable): Unit

  def shutdown(): Unit = ()

  def shutdownNow() = Collections.emptyList[Runnable]

  def isShutdown = false

  def isTerminated = false

  def awaitTermination(l: Long, timeUnit: TimeUnit) = true
}

object JavaFXExecutorService extends GUIExecutorService {
  override def execute(command: Runnable) = Platform.runLater(command)
}

object SwingExecutorService extends GUIExecutorService {
  override def execute(command: Runnable) = SwingUtilities.invokeLater(command)
}

object JMEExecutorService extends GUIExecutorService {
  override def execute(command: Runnable) =
    JMERunner.runner.get.apply(command)
  // new SingleThreadEventExecutor()
  sys.addShutdownHook(JMEExecutorService.shutdown())
}

object JMERunner {
  var runner: Option[Runnable => Unit] = None

}

class JavaFXEventThreadExecutorServiceConfigurator(
    config: Config,
    prerequisites: DispatcherPrerequisites
) extends ExecutorServiceConfigurator(config, prerequisites) {
  private val f = new ExecutorServiceFactory {
    def createExecutorService: ExecutorService = JavaFXExecutorService
  }

  def createExecutorServiceFactory(
      id: String,
      threadFactory: ThreadFactory
  ): ExecutorServiceFactory = f
}

class JMEThreadExecutorServiceConfigurator(
    config: Config,
    prerequisites: DispatcherPrerequisites
) extends ExecutorServiceConfigurator(config, prerequisites) {
  private val f = new ExecutorServiceFactory {
    def createExecutorService: ExecutorService = JMEExecutorService
  }

  def createExecutorServiceFactory(
      id: String,
      threadFactory: ThreadFactory
  ): ExecutorServiceFactory = f
}

// Then we create an ExecutorServiceConfigurator so that Akka can use our SwingExecutorService for the dispatchers
class SwingEventThreadExecutorServiceConfigurator(
    config: Config,
    prerequisites: DispatcherPrerequisites
) extends ExecutorServiceConfigurator(config, prerequisites) {
  private val f = new ExecutorServiceFactory {
    def createExecutorService: ExecutorService = SwingExecutorService
  }

  def createExecutorServiceFactory(
      id: String,
      threadFactory: ThreadFactory
  ): ExecutorServiceFactory = f
}

object JFXExecutionContexts {
  val javaFxExecutionContext: ExecutionContext =
    ExecutionContext.fromExecutor(new Executor {
      def execute(command: Runnable): Unit = {
        Platform.runLater(command)
      }
    })
  val fxScheduler =
    Scheduler(javaFxExecutionContext)

}