package drills.drill06.exercise4.actuator

import java.util.concurrent.CountDownLatch
import java.util.concurrent.TimeUnit

class Actuator(private val action: Action) : Thread() {
    var latch = CountDownLatch(1)

    override fun run() {
        while (true) {
            latch.await()

            synchronized(this) {
                latch = CountDownLatch(1)
            }

            if (action.getState() == Action.State.OFF)
                action.on()

            latch.await(2050, TimeUnit.MILLISECONDS)

            synchronized(this) {
                if (latch.count == 1L)
                    action.off()
            }
        }
    }

    @Synchronized
    fun actuate() {
        latch.countDown()
    }
}