#if UNITY_5_3_OR_NEWER
#define NOESIS
#endif

#if NOESIS
using Noesis;
using UnityEngine;

#else
using System;
#endif

namespace Noesis.Samples
{
    /// <summary>
    /// Buttons sample view model
    /// </summary>
    public class ButtonsViewModel
    {
        private Button _startButton;
        public ButtonsViewModel(Button startButton)
        {
            _startButton = startButton;
            StartCommand = new DelegateCommand(this.Start);
            SettingsCommand = new DelegateCommand(this.Settings);
            ExitCommand = new DelegateCommand(this.Exit);
        }

        public DelegateCommand StartCommand { get; private set; }
        public DelegateCommand SettingsCommand { get; private set; }
        public DelegateCommand ExitCommand { get; private set; }

        private void Start(object parameter)
        {
            Test.PrepareTiltReturnStoryboard(_startButton);
#if NOESIS
            Debug.Log("Start Game");
#endif
        }

        private void Settings(object parameter)
        {
#if NOESIS
            Debug.Log("Change Settings");
#endif
        }

        private void Exit(object parameter)
        {
#if NOESIS
            Debug.Log("Exit Game");
#endif
        }
    }

    public class Test
    {
        private static Storyboard story;
        public static void PrepareTiltReturnStoryboard(Button button)
        {
            if (story != null)
            {
                story.Stop(); // all OK
                story = null;
            }
            else
            {
                button.Projection = new PlaneProjection();

                // setup animation
                Storyboard story = new Storyboard();
                story.Completed += (sender, args) => { button.Content = "done"; };
                DoubleAnimation anim = new DoubleAnimation();
                Storyboard.SetTargetProperty(anim, new PropertyPath("(UIElement.Projection).(PlaneProjection.RotationZ)"));
                anim.To = 45;
                anim.Duration = System.TimeSpan.FromSeconds(2);
                story.Children.Add(anim);

                Storyboard.SetTarget(anim, button);
                story.Begin(button, true);
                if (story.IsPlaying()) // ERROR: this code will show "Target Not Found" crash in Unity log 
                {
                    story.Stop(); // ERROR: this code will show "Target not Found" too in case the if() is removed
                }
            }
        }
    }
}