the-gay

package my.pack;

import java.util.HashMap;
import java.util.Map;
import java.util.PriorityQueue;

public class Controller {

    static interface Command {
        int getID();
        void execute();
    }

    Map<Integer, Long> runtimes = new HashMap<>();
    PriorityQueue<Command> queue;

    private class TimeMeasuringCommand implements Command {

        private Command c;

        public TimeMeasuringCommand(Command c) {
            this.c = c;
        }

        @Override
        public int getID() {
            return c.getID();
        }

        @Override
        public void execute() {
            long start = System.currentTimeMillis();
            c.execute();
            long end = System.currentTimeMillis();
            runtimes.put(c.getID(), end - start);
        }

    }

    Controller() {
        queue = new PriorityQueue<Command>(0,
                (x, y) -> Long.compare(runtimes.get(x.getID()),
                        runtimes.get(y.getID())));
    }

    void insertCommand(Command c) {
        if (!runtimes.containsKey(c.getID())) {
            runtimes.put(c.getID(), 0L);
            queue.add(new TimeMeasuringCommand(c));
        }
        else {
            queue.add(c);
        }

    }
}