package helloworld;

import static helloworld.HelloWorld.Repeater.repeatIt;

public class HelloWorld {

    public HelloWorld() {
        Class<?> executingClass = this.getClass();
        Tuple<Integer, String> data = extractMessage(executingClass);

        class SimplePrinter implements Runnable {
            private final String message;

            SimplePrinter(String message) {
                this.message = message;
            }

            @Override
            public void run() {
                System.out.println(message);
            }
        }
        repeatIt(data.first, new SimplePrinter(data.second));
    }

    private Tuple<Integer, String> extractMessage(Class<?> clazz) {
        char[] className = clazz.getSimpleName().toCharArray();
        StringBuilder messageBuilder = new StringBuilder("");
        int splitIndex = 0;
        for (char character : className) {
            if (Character.isUpperCase(character) && className[0] != character) {
                messageBuilder.append(" ");
                splitIndex = clazz.getSimpleName().indexOf(character);
            }
            messageBuilder.append(character);
        }
        return new Tuple<>(splitIndex, messageBuilder.toString());
    }

    public static void main(String[] args) {
        new HelloWorld();
    }

    private class Tuple<X, Y> {
        public final X first;
        public final Y second;

        public Tuple(X x, Y y) {
            this.first = x;
            this.second = y;
        }
    }

    public static class Repeater {

        public static void repeatIt(int times, Runnable action) {
            for (int i = 0; i < times; i++) {
                action.run();
            }

        }

    }

}