package poc

import org.scalajs.dom

import scala.scalajs.js
import scala.scalajs.js.annotation.JSExport

@js.native
object WorkerGlobal extends js.GlobalScope {
  def addEventListener(`type`: String, f: js.Function): Unit = js.native
  def postMessage(data: js.Any): Unit = js.native
}

@JSExport("WorkerMain")
object WorkerMain {
  @JSExport
  def main(): Unit = {
    WorkerGlobal.addEventListener("message", onMessage _ )
    WorkerGlobal.postMessage(s"Started")
  }

  val timeMessage = """Time.*""".r
  var count = 0

  def onMessage(msg: dom.MessageEvent) = {
    val s = msg.data.asInstanceOf[String]
    s match {
      case timeMessage() =>
        count += 1
        if(count % 600 == 0)
          WorkerGlobal.postMessage("60fps")
      case _ =>
        WorkerGlobal.postMessage(s"Received: $s")
    }
  }
}