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package akka.dispatch

import java.util.Collection
import java.util.concurrent.{ TimeUnit, Callable, ExecutorService }
import scala.concurrent.Future
import scalajs.js.timers.setTimeout
import scalajs.js.Dynamic.global
import scalajs.js

class EventLoopExecutor extends ExecutorServiceDelegate {
  def executor: ExecutorService = this

  final val deferringFunction: Runnable => Unit =
    if (js.isUndefined(global.setImmediate)) {
      { command: Runnable => global.setTimeout(command.run _, 0) }
    } else {
      { command: Runnable => global.setImmediate(command.run _) }
    }

  private[this] var _isShutdown = false

  // XXX: DO NOT CHANGE THIS TO USE scaaljs.js.timers.setTimeout
  // We need to access global because otherwise the overridden setTimeout
  // in `akka-js-testkit` fails to execute
  @inline
  override def execute(command: Runnable) =
    if (!_isShutdown) deferringFunction(command)

  override def shutdown() = _isShutdown = true

  override def shutdownNow() = ???

  override def isShutdown() = _isShutdown

  override def isTerminated = ???

  override def awaitTermination(l: Long, timeUnit: TimeUnit) = ???

  override def submit[T](callable: Callable[T]) = ???

  override def submit[T](runnable: Runnable, t: T) = ???

  override def submit(runnable: Runnable) = ???

  override def invokeAll[T](callables: Collection[_ <: Callable[T]]) = ???

  override def invokeAll[T](callables: Collection[_ <: Callable[T]], l: Long, timeUnit: TimeUnit) = ???

  override def invokeAny[T](callables: Collection[_ <: Callable[T]]) = ???

  override def invokeAny[T](callables: Collection[_ <: Callable[T]], l: Long, timeUnit: TimeUnit) = ???
}