using System;
using Ooui;

namespace CounterApp
{
    class Program
    {
        static void Main(string[] args)
        {
            UI.Publish ("/counter", CreateCounter);

            Console.ReadLine ();
        }
        static Element CreateCounter ()
        {
            var count = 0;
            var countLabel = new Span(count.ToString());
            var upButton = new Button("Increase");
            var downButton = new Button("Decrease");

            var counter =
                new Div(new Div(upButton),
                        new Div(countLabel),
                        new Div(downButton));

            void ChangeCount(int amount) {
                count += amount;
                countLabel.Text = count.ToString();
            }
            upButton.Click += (s, e) => ChangeCount(1);
            downButton.Click += (s, e) => ChangeCount(-1);

            return counter;
        }
    }
}